The estimation of the transmission channel in a wireless communication system

 

The invention relates to a wireless communication system. To improve the evaluation of wireless transmission channels in communication systems, simplification and optimization, which is a technical result that is used the correlation of different impulse responses of the channels defined in a different way. 8 N. and 35 C.p. f-crystals, 14 ill.

In radio communication with the communication line between the source information and the consumer information processing and transmission of information are used in transmitting and receiving device, in which

1) processing and transmission of information may be made in the preferred direction of transmission (simplex mode) or in both transmission directions (full duplex),

2) the processing of information is done in analog or in digital form,

3) the transmission of information via the communication is carried out by wire or wirelessly on the basis of different methods of message transmission, such as multiple access frequency division (FDMA equipment) channels, multiple access with time division (mdvr) channels and/or multiple access code division (mdcr) channels, for example in accordance with various communication standards, so what stupa) or PACS (communication System with archiving images) IS (international standard)-54, PHS, PDC (Personal digital channel) and so on (see IEEE Communications Magazine, January 1995, s.50-57; D. D. Falconer et al., Time Division Multiple Access Methods for Wireless Personal Communications).

The term “communication” means the generic term that is used for features such as semantic content (information) and the physical representation (signal). In spite of the same message, i.e., the same information can be used in various waveforms. For example, a message relating to the same subject, can be transmitted

(1) in the form of image,

(2) as the spoken word,

(3) as the written word,

(4) as an encrypted word or image.

Transmission type corresponding to the points(1), (2), (3), normally characterized by continuous (analog) signals, while the type of the transfer under paragraph (4) is usually due to intermittent signals (e.g. pulses, digital signals).

Based on this General definition of the transmission system, the invention relates to a method for estimating transmission channels in a wireless communication system according to the generic characteristics of paragraphs 1, 6, 9 and 11 of the claims, as well as to the transmitter/receiver to estimate channel transmission is adnie communication systems are described in the following publications: (1) Nachrichtentechnik Elektronik, Berlin 45, 1995, Heft 1, S. 10-14; Heft 2, S. 24-27; P. Jung, B. Steiner: Konzepts a CDMA-Mobilfunksystem mit gemeinsamer Detektion fuer die dritte Mobifunkgeneration"; (2) Nachrichtentechnik Elektronik, Berlin 41,1991, Heft 6, S. 223-227, S. 234; P. W. Baier, P. Jung, A. Klein: "CDMA - ein guenstiges Vielfachzugriffsverfahren fuer frequenzselektive und zeitvariante Mobilfunkkanaele"; (3) IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E79-A, No. 12, Dec. 1996, S. 1930-1937; P. W. Baier, P. Jung: "CDMA Myths and Realities Revisited"; (4) IEEE Personal Communications, Feb. 1995, p. 38-47; A. Urie, M. Streeton, C. Mourot, "An Advanced TDMA Mobile Access System for UMTS"; (5) telecom praxis, 5/1995, S. 9-14; P. W. Baier: "Spread-Spectrum-Technik und, CDMA - eine urspruenglich militaerische Technik erobert den zivilen Bereich"; (6) IEEE Personal Communications, Feb. 1995, p. 48-53; P. G. Andermo, L. M. Ewerbring: "An CDMA-Based Radio Access Design for UMTS"; (7) ITG Fachberichte 124 (1993), Berlin, Offenbach: VDE Verlag ISBN 3-8007-1965-7, S. 67-75; Dr. T. Zimmermann, Siemens AG: "application von CDMA in der Mobilkommunikation"; (8) telcom report 16, (1993), Heft 1, S. 38-41; Dr. T. Ketseoglou, Siemens AG, Dr. T. Zimmermann, Siemens AG: "Effizienter Teilnehmerzugriff fuer die 3.Generation der Mobilkommunikation - Vielfachzugriffsverfahren CDMA macht Luftschnittstelle flexibler". Similar systems in the aspect of Universal mobile telecommunications system (UMTS) are considered as the basis of promising Radiocommunication systems of the third generation.

Telecommunication systems of the second generation are defined currently in the range of micro - and macrotec radio system GSM (global system for mobile communication) based on the principle of transmission modes FDMA equipment/MDR/HDR (duplex the uropaeische Mobilfunknetze", S. 137-152; (2) R. Steele: Mobile Radio Communications, Pentech Press, 1992 (Reprint 1994), Chapter 8: The Pan-European Cellular Mobile Radio System - known as GSM, S. 677 ff.; (3) telekom praxis 4/1993, P. Smolka: "GSM-Funkschnittstelle - Elemente und functions, S. 17, 24), and in the range of pechacek radio system DECT standard, i.e., Digital enhanced (formerly European) wireless communication system based on the principle of transmission modes FDMA equipment/MDR/DDA (full duplex time division) (see, for example, (1) Nachrichtentechnik Elektronik 42 (1992) Jan./Feb. No. 1, Berlin, DE; U. Pilger "Struktur des DECT-Standards", 's.23-29, ETSI-Publikation ETS 300175-1... 9, Okt. 1992; (2) telcom report 16 (1993), No. 1, J. H. Koch, "Digitaler Komfort für schnurlose Telekommunikation - DECT-standard eroeffnet neue Nutzungsgebiete", 's.26-27; (3) tec 2/93 - Das technische Magazin von Ascom. "Wege zur universellen mobilen Telekommunikation", 's.35-42; (4) Philips Telecommunication Review, Vol. 49, No. 3, Sept. 1991, R. J. Mulder, "DECT, a universal cordless access system"; (5) WO 93/21719 (Fig. 1-3 with the corresponding description of these drawings).

In Fig. 1 shows the structure of multicode channel graph frame mdvr and structure of time intervals mdvr for the payload channel graph according to the GSM standard for mobile communications (see (1) Informatik Spektrum 14 (1991) June, Nr. 3, Berlin, DE; A. Mann: "Der GSM-standard-Grundlage für digitale europaeische Mobilfunknetze", S. 137-152; (2) R. Steele: Mobile Radio Communications, Pentech Press, 1992 (Reprint 1994), Chapter 8: The Pan-European Cellular Mobile Radio System-known as GSM, S. 677 ff.; (3) telekom praxis 4/1993, P. Smolka: "GSM-Funkschnittstelle - Elemente und Funktione The P in the ascending line (corresponding to the direction of transmission from the mobile station to the base station) is transmitted in the frequency range from 890 MHz to 915 MHz, and in the downlink (corresponds to the direction of transmission from the base station to the mobile station) in the frequency range from 935 MHz to 960 MHz.

In Fig. 2 shows the structure of multicade, frame mdvr and time intervals mdvr for the payload channel graph corresponding to the DECT standard for mobile communications (see (1) Nachrichtentechnik Elektronik 42 (1992) Jan./Feb. No. 1, Berlin, DE; U. Pilger "Struktur des DECT-Standards", 's.23-29), where the data is presented in the drawing the structure, in accordance with the principle of DDA in downlink (corresponds to the direction of transmission from the base station to the mobile station) is transmitted during the time interval 0...11, and in the ascending line (corresponding to the direction of transmission from the mobile station to the base station) at time intervals of 12...23.

In Fig. 3 shows, on the basis of the above-mentioned publication (Nachrichtentechnik Elektronik, Berlin 45, 1995, Heft 1, S. 10-14; Heft 2, S. 24-27; P. Jung, B. Steiner: Konzepts a CDMA-Mobilfunksystem mit gemeinsamer Detektion fuer die dritte Mobifunkgeneration") possible multiple access modes FDMA equipment/MDR/mdcr for the upward communication line (corresponding to the direction of transmission from the mobile station to the base station) and downlink (corresponds to the direction of transmission from the base Stanimir, according to the principle of mobile communication mdcr with joint detection, in which, as in the system of the GSM standard (see Fig. 1) data is transmitted in accordance with the principle of HDR in the ascending line (corresponding to the direction of transmission from the mobile station to the base station) and downlink (corresponds to the direction of transmission from the base station to the mobile station) in different frequency ranges.

The number of simultaneously active users in one time interval is, for example, K=8.

In Fig. 4 shows, on the basis of the submission of multiple access in Fig. 3, known from the aforementioned publication (Nachrichtentechnik Elektronik, Berlin 45, 1995, Heft 1, S. 10-14; ft 2, S. 24-27; P. Jung, B. Steiner: Konzepts a, CDMA-Mobilfunksystem mit gemeinsamer Detektion fuer die dritte Mobifunkgeneration"), a well-known structure of a time frame (see Fig. 5 the specified publication) upward communication (corresponding to the direction of transmission from the mobile station to the base station) for mobile communication mdcr with joint detection.

It is shown in Fig. 4 24 characters of the data block payload expands range with code extensions for each specific user with the expansion coefficient Q=14, so that each data symbol 14 contains an element Denmark radio standard GSM using, for example, two cells of the radio communication with their base stations (base transceiver station - BPS), and the first base station BPS (transmitter/receiver) Omni-directional “irradiates” first cell radio AR, and the second base station BPS (transmitter/receiver) omnidirectional irradiates the second cell radio AR, while the base station BPS, BPS linked, or may contact with many located in the cell radio AR, AR mobile stations MS...MS (transmitter/receiver) through a specific script for radio FDMA equipment/MDR/mdcr radio interface for wireless unidirectional or bidirectional ascending and/or descending lines through respective transmission channels. The base station BPS 1, BPPS in a known manner (as in the mobile communication system GSM) associated with base station controller (ASC), which is under the control base stations takes control functions of frequency and connectivity. The base station controller KBS with his hand through the switching center mobile stations (SMC) is connected with the higher-level telecommunications network, e.g. the public switched telephone network General floor is Noah communication system. He performs a full call management, using the appropriate register (not shown) performs the functions of a user authentication system of communication and control network location.

Fig. 6 illustrates the principle of the base station BPS, BPS, designed as a transmitter/receiver, and Fig. 7 - principle of the mobile station MS...MS, designed as a transmitter/receiver. The base station BPS 1, BPS is sending radio messages to mobile stations MS...MS and receive messages from them, while the mobile station MS...MS transmits radio messages to the base station BPS, BPS and receive messages from it. The base station has a transmitting antenna Plant and the receiving antenna Print, and the mobile station MS...MS has a common antenna Ant used with the antenna switch up as on transmission and on reception. In uplink communication (receive channel) base station BPS, BPS receives through the receiving antenna Print at least one message with a single FDMA equipment/MDR/mdcr component from at least one of the mobile stations MS...MS, while the mobile station MS...MS for downlink (receive channel) via the common antenna is from one base station BPS, BPS. Message Radiocommunication CF formed when the carrier signal, the advanced along the spectrum, with a superimposed information by modulation of the data symbols.

In the receiving unit PRU received carrier signal is filtered and converted to an intermediate frequency, which is then sampled and quantized. After analog-to-digital conversion of the signal distorted in the channel due to multipath propagation, served in the correction block Bq, which corrects most part distortion (with synchronization).

Thereafter, in block channel estimation (SIDE) is an attempt to estimate the properties of a transmission channel (channel graphics - CT), which was implemented message sending radio WED. The transmission properties of the channel that you specify in the time domain using an impulse response of the channel. In order to estimate the impulse response of the channel, the radio message on the transmission side (in this case from the mobile station MS...MS or respectively the base station BPS, BPS) is given special additional information generated in the form of test information sequences, the so-called “metaboli” (by analogy with the “preamble”).

Codec channel (QC) of the received bit sequence is decoded componentwise. In accordance with the channel bit data is transmitted in the time interval of the control and alarm or the time interval of the speech signal and, in the case of the base station (Fig. 6), data management and signaling and voice data for transmission to the base station controller KBS transferred to the appropriate interface (S) provided for signaling and encoding/decoding of speech (speech codec), and in the case of the mobile station (Fig. 7) data management and signaling are transmitted to the control unit and alarm (BEADS) used to perform all functions of the alarm and control mobile station, E. speech interface, And base stations BPS, BPS speech data is converted into a predetermined data stream (for example, a stream with a speed of 64 kbit/s in the direction to the network and, accordingly, the flow at the rate of 13 kbit/s from the network).

In the control unit BU is full control of base stations BPS, BPS.

In the downstream direction (transmission path) base station BPS, BPS passes through the transmitting antenna Plant, for example, at least one communication radio WED containing component FDMA equipment/MDR/mdcr at least one mobile station MS...MS, while in the uplink direction (transmission path) of the mobile station MS...MS through the common antenna Ant transmits, for example, at least one message Radiocommunication CF component FDMA equipment/MDR/mdcr at least one base station BPS.BPS.

The transmission path begins at the base station BPS 1, BPPS in Fig.6 the fact that the received code channel QC from the base station controller ASC interface And data management and signaling and voice data are sent in the time interval of the control and alarm or time interval of the speech signal, and the data in these time intervals componentwise encoded by getting bit pic is ke channel QC from the speech codec KR speech data and from the control unit and alarm BUS control data and signaling are sent in the time interval of the control and alarm or time interval of the speech signal, and the data in these time intervals componentwise encoded by receiving the bit sequence.

Received in the base station BPS, BPS and the mobile station MS...MS bit sequence is converted into the character data in the corresponding data Converter symbols (PDS). Then the received data symbols are expanding the spectrum using individual for each user code in the block spread spectrum (SRS). In the generator package SE, consisting of a block layout packages (BCP) and a multiplexer (M), in block layout packages BKP advanced spectrum data characters added test information sequence in the form of “metaboli” for channel estimation, and the multiplexer M thus obtained information packet is placed in the corresponding time interval. Then the received packet is modulated in the modulator Mod to transfer at a high frequency, and is subjected to d / a conversion, before the thus obtained signal in the form of message radio WED transmitting through the device the remote control will be transferred to the transmitting antenna Plant or respectively in the common antenna Ant for radiation.

In wireless systems Sugak, Berlin 45, 1995, Heft 1, S. 10-14; Heft 2, S. 24-27; P. Jung, B. Steiner: Konzepts a CDMA-Mobilfunksystem mit gemeinsamer Detektion fuer die dritte Mobifunkgeneration"; (2) Nachrichtentechnik Elektronik, Berlin 41, 1991, Heft 6, S. 223-227, S. 234; P. W. Baier, P. Jung, A. Klein: "CDMA-ein guenstiges Vielfachzugriffsverfahren fuer frequenzselektive und zeitvariante Mobilfunkkanaele"; (3) IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E79-A, No. 12, Dec. 1996, S. 1930-1937; P. W. Baier, P. Jung: "CDMA Myths and Realities Revisited"; (4) IEEE Personal Communications, Feb. 1995, p. 38-47; A. Urie, M. Streeton, C. Mourot, "An Advanced TDMA Mobile Access System for UMTS"; (5) telecom praxis, 5/1995, S. 9-14; P. W. Baier: "Spread-Spectrum-Technik und CDMA - eine urspruenglich militaerische Technik erobert den zivilen Bereich"; (6) IEEE Personal Communications, Feb. 1995, p. 48-53; P. O. Andermo, L. M. Ewerbring: "An CDMA-Based Radio Access Design for UMTS"; (7) ITG Fachberichte 124 (1993), Berlin, Offenbach: VDE Verlag ISBN 3-8007-1965-7, S. 67-75; Dr. T. Zimmermann, Siemens AG: "application von CDMA in der Mobilkommunikation"; (8) telcom report 16, (1993), Heft 1, S. 38-41; Dr. T. Ketseoglou, Siemens AG, Dr. T. Zimmermann, Siemens AG: "Effizienter Teilnehmerzugriff fuer die 3.Generation der Mobilkommunikation - Vielfachzugriffdverfahren CDMA macht Luftschnittstelle flexibler"), consisting in the fact that the properties of the transmission on the transmission path, the transmission channel or in the channel of the mobile radio change over time. The properties of a transmission channel of the mobile radio in the time domain are characterized by the impulse response of the channel. Therefore, especially in mobile communication systems based on the principles mdvr, try to estimate the impulse response of the channel of mobile communication. While imposing a test posledovatelnostei mdvr. With the help of a received signal obtained on the basis of the test sequence or, respectively, test signals, you can determine the impulse response of the channel of mobile communication.

From DE-19523327 A1 there is a method to improve the estimation of the pulse response of the transmission channel, in which a test signal of known content is transmitted from the transmitter to the receiver. Estimated deviation between the actual and the calculated change of the test signal.

From DE-19506117 C1-known method and device for estimating an impulse response of the transmission channel, wherein at the transmitting side code applies spread spectrum, and on the receiving side corresponding correlation code.

From DE-19506109 C1-known method and device for estimating an impulse response of the transmission channel, wherein at the receiving side, depending on the parameters of the model are simulated stochastic processes.

From EP-0535403 A1 is known a method of channel estimation, which at the time of reception of digital mdvr signal data symbols of the first time interval and adjacent the second time interval, which contain, respectively, the test sequence for channel estimation, are used for evaluation of the first impulselike the second time interval. Both the impulse response of the channel by linear interpolation produces an intermediate impulse response lying between these two impulse responses of the channel.

From DE 4233222 A1 in conjunction with a measuring system for the analysis of mobile radio communications, which are determined by the impulse response of the channel, known summation (integration) directly following each other impulse response of the channel. This integration of the impulse response of the channel is suitable for removing large measurement errors, but only for quasi-static channels.

The objective of the invention is to improve the evaluation of wireless transmission channels in communication systems, simplification and optimization.

This problem is solved on the basis of way, certain generic terms in paragraphs 1, 6, 9 and 11 of the claims, with the distinctive signs provided for in paragraphs 1, 6, 9 and 11 claims.

In addition, this problem is solved on the basis of the transmitter/receiver, certain generic terms in paragraphs 22, 27, 30 and 32 of the claims, with the distinctive signs provided for in paragraphs 22, 27, 30 and 32 of the claims.

The idea underlying the invention, sostoi is bent so that that

(i) under paragraph 1 and, respectively, 22 user of the communication system (for example, according to Fig. 5, the internal user of the system to the mobile station MS, ...MS and/or other internal system user in the mobile station MS...MS (internal connection) or external to the system user at a higher level of PSTN (external link), which is designed to accept his message (in case of communications systems mdvr the user, which correlated n-th time interval of the frame mdvr) also receives messages intended for other users and transmitted in the same transmission direction (in the case of communication systems mdvr for the user with whom correlated, for example, (n-1)-th time interval of the frame MDR), and uses them to estimate the channel. This ensures a significant improvement of the frequency characteristics of the error bits (hospital has no facilities), which is a function of the relationship of bit energy to power density of the noise (the hospital has no facilities=f(Eb/N0)).

(ii) additionally, in accordance with paragraphs 2 and 3 or, respectively, 23 and 24 or, alternatively, under paragraph 6 or, respectively, 27, defines two sufficiently similar to an impulse response of the channel, which, for example, according uncanny intervals and the variance is below a predetermined boundary values. Thereby, it is possible to ensure that required hospital has no facilities need less Eb/N0than without using this information.

(iii) in addition, pursuant to paragraph 4 or, respectively, 25 or, alternatively, under paragraph 9 and, respectively, 30 when two sufficiently similar impulse responses of the channels, the deviation is below a predefined boundary values for each of the n-th time interval for transmission, for example, under paragraph 21 and, respectively, 41, is not passed the test information sequence or, respectively, test signals (“metaboli”). Thereby, it is possible to increase the data rate for the corresponding user.

(iv) in addition, according to paragraph 5 or, respectively, 26 or, alternatively, under paragraph 11 or, respectively, 32 are determined by the conversion tables for different carrier frequencies of the communications system, which shows the relationship between the correlation coefficient and speed to the user, depending on the carrier frequency (absolute speed). Using these tables, you can simplify the estimation of the channel. A prerequisite for the definition of the tables is that the correlation properties assessed the speed of the user. If the estimated impulse responses of the channels are correlated, then the user moves with the relative speed. If the estimated impulse responses of the channels correlatively, the user moves with a higher relative velocity.

Further preferred embodiments of the invention shown in the remaining dependent claims.

The embodiments of the invention are explained with reference to Fig. 8-14, which presents the following:

Fig. 8 - on the basis of Fig. 6, a block diagram of a base station according to the first variant embodiment of the invention; and

Fig. 9 - on the basis of Fig. 7, a block diagram of a mobile station according to the first preferred variant embodiment of the invention; and

Fig. 10 - on the basis of Fig. 6, a block diagram of a base station according to the second preferred variant embodiment of the invention; and

Fig. 11 - on the basis of Fig. 7, a block diagram of a mobile station according to the second preferred variant embodiment of the invention; and

Fig. 12 - on the basis of Fig. 6, a block diagram of a base station according to the third preferred variant embodiment of the invention; and

Fig. 13 - on the basis of Fig. 7, a block diagram of a mobile station according tert is Antii according to the fourth preferred variant embodiment of the invention.

Fig. 8 and 9 illustrate, in accordance with the first embodiment of the invention, based on Fig. 6 and 7, the principle of construction of the base station BPS, BPS (Fig. 8) and the mobile station MS...MS (Fig. 9). A significant difference between the corresponding execution according to Fig. 6 and 7 and the corresponding execution according to Fig. 8 and 9 is that in the past used a modified block channel estimation by SIDE’. This block channel estimation by SIDE’ are made so that the user of the communication system (for example, according to Fig. 5, the internal user of the system to the mobile station MS, ...MS and/or other internal system user in the mobile station MS...MS (internal connection) or external to the system user at a higher level of PSTN (external link), which is designed to accept his message (in case of communications systems mdvr the user, which correlated n-th time interval of the frame mdvr) also receives messages intended for other users and transmitted in the same transmission direction (in the case of communication systems mdvr for the user with whom correlated, for example, (n-1)-th time interval of the frame MDR), and uses them to estimate the channel. This ensures sushestve to the power density of the noise (the hospital has no facilities=f(Eb/No)).

Fig. 10 and 11 illustrate, in accordance with the second embodiment of the invention, based on Fig. 6 and 7, the principle of construction of the base station BPS, BPS (Fig. 10) and the mobile station MS...MS (Fig. 11). A significant difference between the corresponding execution according to Fig. 6 and 7 and the corresponding execution according to Fig. 10 and 11 is that the latter is provided in unit assessment PP. This device evaluation UO is bidirectional and correlated respectively with block channel estimation by SIDE and with a control unit BU or respectively by the control unit and alarm BEADS or connected with them and forms with them the appropriate means of channel estimation. These tools channel estimation differ from the corresponding block channel estimation is the fact that by means of device evaluation UO under control of a control unit BU or, respectively, a control unit and alarm BUS defines two obtained the corresponding block channel estimation the BOKEH is quite similar to an impulse response of the channel, which are measured, for example, in various (not necessarily consecutive) time intervals and the deviation does not exceed a predefined boundary znachenie and Comparer. A predefined limit value is, for example, the control unit BU or control unit and alarm BEADS. Thus, it can be ensured that the desired frequency error bit (hospital has no facilities) sufficient to be less Eb/Nothan without using this information.

Fig. 12 and 13 illustrate, in accordance with the third embodiment of the invention, based on Fig. 6 and 7, the principle of construction of the base station BPS, BPS (Fig. 12) and the mobile station MS...MS (Fig. 13). A significant difference between the corresponding execution according to Fig. 6 and 7 and the corresponding execution according to Fig. 12 and 13 is that in the latter is provided a modified device evaluation UO’. This device evaluation UO’ is bidirectional and correlated respectively with block channel estimation by SIDE and with a control unit BU or respectively with the control unit and alarm BEADS or connected with them and forms with them the appropriate means of channel estimation. These tools channel estimation differ from the corresponding block channel estimation is the fact that by means of device evaluation UO’ under control of a control unit BU or block control the x impulse response of the channel, estimated, for example, in various (not necessarily consecutive) time intervals and the deviation does not exceed a predefined limit value, for each of the n-th time transmission interval, for example every second packet is not transmitted test information sequence or the test signals (“metaboli”). Device evaluation UO’ contains, for example, the unit of comparison. A predefined limit value is, for example, the control unit BU or control unit and alarm BEADS. Thereby can be improved, in particular, the data rate of the corresponding user.

Fig. 14 illustrates, in accordance with the fourth embodiment of the invention, based on Fig. 6, the principle of construction of the base station BPS, BPS. A significant difference between the execution according to Fig. 6 and execution according to Fig. 14 is that in the past provided a memory block BP controlled from the control unit BU and forming together with the evaluation unit of the channel SIDE and the control unit BU means of channel estimation. In this memory block can be stored in the conversion tables. These conversion tables are preferably composed for the calling user, depending on the carrier frequency (absolute speed). Using these tables, you can simplify the estimation of the channel. A prerequisite for the definition of the tables is that the correlation properties of the estimated impulse responses of the channels previously investigated, and depending on that assesses the relative speed of the user. If the estimated impulse responses of the channels are correlated, then the user moves with the relative speed. If the estimated impulse responses of the channels correlatively, the user moves with a higher relative velocity.

Claims

1. The method of estimating transmission channels in a wireless communications system, in which between the receiver of the first transceiver and the transmitter of the second transceiver to the transmission channels provide unidirectional or bidirectional transmission of messages, wherein the first receiver that receives a first message transmitted from the first transmitter uses at least one additional message, which is transmitted from the first transmitter and/or from another transmitter in the same direction of transmission at least to the one who is the communication system, based on the method of multiple access time division channels (MDR).

3. The method according to p. 2, characterized in that (a) messages distributed over the time interval, (b) estimate the impulse responses of the channel for time intervals with specific additional information, which is shaped in the form of test information sequences, each of which is contained in the message, (c) evaluate the first impulse response of the channel for the first time interval, receiving at the first transceiver, (d) evaluate the second impulse response of the channel for a second time interval of reception in the first transceiver, (e) establish a sufficient similarity between the first pulse response of the channel and the second impulse response of the channel, if the difference is that the first impulse response of the channel is different from the second impulse response of the channel does not exceed a predetermined limit value, (f) form the medium impulse response of the channel from the first impulse response of the channel and from the second impulse response of the channel, if they are sufficiently similar.

4. The method according to p. 2 or 3, characterized in that for each of the n-th time interval between the transmission of the transceiver to the indicate the test information sequence, contained in the corresponding transmitted message for channel estimation if the first impulse response and the second impulse response sufficiently similar.

5. The method according to any of paragraphs.1-4, characterized in that (a) evaluate the first impulse response of the channel is stationary transceiver with specific additional information, which is shaped as a test of the information sequence contained in the messages transmitted in the frequency bands, (b) evaluate the second impulse response of the channel is stationary transceiver with specific additional information, which is shaped as a test of the information sequence contained in the messages transmitted in the frequency bands, (c) establish a sufficient similarity between the first pulse response of the channel and the second impulse response of the channel, if the difference, on which the first pulse response of the channel is different from the second impulse response of the channel is larger than the specified boundary value, (d) the rate referred to the appropriate frequency band of the mobile transceiver from the second transceiver, defined as slow, if the first impulse response of the channel and the second impulse response of the channel ohms correlation and speed, (f) evaluate a predefined number of consecutive impulse response of the channel estimated by the stationary transceiver, based on the conversion tables.

6. The method of estimating transmission channels in a wireless communications system, in which (a) between the receiver of the first transceiver and second transmitters of the transceivers of the communication systems for the transmission channels implement a bidirectional message passing, distributed time intervals, (b) estimate the impulse responses of the channels for time intervals with specific additional information, which is shaped in the form of test information sequences, each of which is contained in the message, wherein (c) evaluate the first impulse response of the channel for the first time interval, receiving at the first transceiver, (d) evaluate the second impulse response of the channel for a second time interval of reception in the first transceiver, (e) establish a sufficient similarity between the first pulse response of the channel and the second impulse response of the channel, if the difference is that the first impulse response of the channel is different from the second impulse response of the channel does not exceed the specified boundary C is osnago of the channel response, if they are sufficiently similar.

7. The method according to p. 6, characterized in that for each of the n-th time interval between the transmission of the transceiver that is communicating station in relation to the first transceiver, for n greater than 1, do not pass the test information sequence contained in the corresponding transmitted message for channel estimation if the first impulse response and the second impulse response sufficiently similar.

8. The method according to p. 6 or 7, characterized in that (a) evaluate the first impulse response of the channel of the stationary transceiver of the first transceiver with the specific additional information that is generated as a test of the information sequence contained in the messages transmitted in the frequency bands, (b) evaluate the second impulse response of the channel is stationary transceiver with specific additional information, which is shaped as a test of the information sequence contained in the messages transmitted in the frequency bands, (c) establish a sufficient similarity between the first pulse response of the channel and the second impulse response of the channel, if the difference, to which the first value, (d) the rate referred to the appropriate frequency band of the mobile transceiver from the second transceiver, defined as slow, if the first impulse response of the channel and the second impulse response of the channel is sufficiently similar, (e) forming a conversion table indicating the relationship between the correlation coefficient and velocity, (f) evaluate a predefined number of consecutive impulse response of the channel estimated by the stationary transceiver, based on the conversion tables.

9. The method of estimating transmission channels in a wireless communications system, in which (a) between the receiver of the first transceiver and second transmitters of the transceivers of the communication systems for the transmission channels implement a bidirectional message passing, distributed time intervals, (b) estimate the impulse responses of the channels for time intervals with specific additional information, which is shaped in the form of test information sequences, each of which is contained in the message, wherein (c) evaluate the first impulse response of the channel for the first time interval, receiving at the first transceiver, (d) evaluate the second sufficient similarity between the first pulse response of the channel and the second impulse response of the channel, if the difference is that the first impulse response of the channel is different from the second impulse response of the channel is larger than the specified boundary value, (f) for every n-th time interval between the transmission of the transceiver that is communicating station in relation to the first transceiver, for n greater than 1, do not pass the test information sequence contained in the corresponding transmitted message for channel estimation if the first impulse response and the second impulse response sufficiently similar.

10. The method according to p. 9, characterized in that (a) evaluate the first impulse response of the channel of the stationary transceiver of the first transceiver with the specific additional information that is generated as a test of the information sequence contained in the messages transmitted in the frequency bands, (b) evaluate the second impulse response of the channel is stationary transceiver with specific additional information, which is shaped as a test of the information sequence contained in the messages transmitted in the frequency bands, (c) establish a sufficient similarity between the first pulse response of the channel is whose impulse response of the channel, do not exceed a specified limit value, (d) the rate referred to the appropriate frequency band of the mobile transceiver from the second transceiver, defined as slow, if the first impulse response of the channel and the second impulse response of the channel is sufficiently similar, (e) forming a conversion table indicating the relationship between the correlation coefficient and velocity, (f) evaluate a predefined number of consecutive impulse response of the channel estimated by the stationary transceiver, based on the conversion tables.

11. The method of estimating transmission channels in a wireless communications system, and between the receiver of the first transceiver and second transmitters of the transceivers of the communication systems for the transmission channels perform bidirectional message transmission in frequency bands, characterized in that (a) evaluate the first impulse response of the channel of the stationary transceiver of the first transceiver with the specific additional information that is generated as a test of the information sequence contained in the messages transmitted in the frequency bands, (b) evaluate the second impulse response of the channel is stationary primape outermost, contained in the messages transmitted in the frequency bands, (c) establish a sufficient similarity between the first pulse response of the channel and the second impulse response of the channel, if the difference is that the first impulse response of the channel is different from the second impulse response of the channel is larger than the specified boundary value, (d) the rate referred to the appropriate frequency band of the mobile transceiver from the second transceiver, defined as slow, if the first impulse response of the channel and the second impulse response of the channel is sufficiently similar, (e) forming a conversion table indicating the relationship between the correlation coefficient and speed, (f) evaluate a predefined number of consecutive impulse response of the channel estimated by the stationary transceiver, based on the conversion tables.

12. The method according to any of paragraphs.1, 6-11, characterized in that the communication system is a communication system based on the method of multiple access with time division multiplexing, code division multiplexing (MDR/mdcr).

13. The method according to any of paragraphs.2-5, characterized in that the communication system is a communication system based on mdcr.

14. SP is m detection.

15. The method according to p. 1 or 2, characterized in that the first transmitter is a mobile station, and the first receiver is a base station.

16. The method according to any of paragraphs.1, 3, 4, 6, 7 or 9, characterized in that the first transceiver is a base station.

17. The method according to any of paragraphs.1, 3, 4, 6, 7 or 9, characterized in that the first transceiver is a mobile station.

18. The method according to any of paragraphs.5, 8, 10 or 11, characterized in that the stationary transceiver is a base station and the mobile transceiver is a mobile station.

19. The method according to any of paragraphs.3, 6 or 9, characterized in that the first period of reception and the second time interval of the reception directly follow each other.

20. The method according to any of paragraphs.3, 6 or 9, characterized in that the first period of reception and the second period of reception are in the same frame mdvr.

21. The method according to any of paragraphs.3, 6 or 9, characterized in that the first period of reception and the second period of reception are in different frames mdvr.

22. The method according to any of paragraphs.4, 7 or 9, characterized in that the number n is equal to 2.

23. Transceiver to the station with him, made in the form of a transceiver of a communication system, the transmission channel is unidirectional or bidirectional transmission of messages containing the assessment tool channel, characterized in that the means of channel estimation is performed in such a way that when the transceiver receives the first message transmitted interacting station, at least one message, which is transmitted from the communicating station and/or other interactive stations in the same direction of transmission to at least one other transceiver, is used for channel estimation.

24. The transceiver under item 23, wherein the communication system is a communication system based on MDR.

25. The transceiver on p. 24, characterized in that the messages are distributed by time intervals and that the means of channel estimation is performed in such a way that (a) is estimated impulse responses of the channel for time intervals with specific additional information, which is shaped in the form of test information sequences, each of which is contained in the message, (b) is measured first impulse response of the channel for a first time interval of the reception, (c) activae similarity between the first pulse response of the channel and the second impulse response of the channel, if the difference is that the first impulse response of the channel is different from the second impulse response of the channel is larger than the specified boundary value, (e) is the average impulse response of the channel from the first impulse response of the channel and from the second impulse response of the channel, if they are sufficiently similar.

26. The transceiver under item 24 or 25, characterized in that the messages are distributed by time intervals and means of channel estimation is performed in such a way that for every n-th time interval for transmission of interactive stations for n greater than 1, is not passed the test information sequence contained in the corresponding transmitted message for channel estimation if the first impulse response and the second impulse response sufficiently similar.

27. The transceiver according to any one of paragraphs.23 to 26, characterized in that the means of channel estimation is performed in such a way that (a) is measured first impulse response of the channel with the specific additional information that is generated as a test of the information sequence contained in the messages transmitted in the frequency bands, (b) second estimated impulse response of the channel with a specific critique the messages, transmitted in the frequency bands, (c) is sufficient similarity between the first pulse response of the channel and the second impulse response of the channel, if the difference is that the first impulse response of the channel is different from the second impulse response of the channel is larger than the specified boundary value, (d) the rate referred to the appropriate frequency band mobile interactive station is made in the form of a transceiver, is defined as slow, if the first impulse response of the channel and the second impulse response of the channel is sufficiently similar, (e) is formed by the conversion table indicating the relationship between the correlation coefficient and velocity, (f) a predefined number of consecutive estimated impulse response of the channel is estimated on the basis of the conversion tables.

28. A transceiver for estimating transmission channels in a wireless communications system, and between the transceiver and interacting with the station, made in the form of a transceiver of a communication system, the transmission channel is a bidirectional message passing, distributed time intervals, together with the channel estimation is designed to assess pulse eccliesioloy information sequence, each of which is contained in the message, characterized in that the means of channel estimation is performed in such a way that (a) the first pulse response of the channel is estimated for a first time interval of the reception, (b) a second impulse response of the channel is estimated for the second time interval of the reception, (c) is sufficient similarity between the first pulse response of the channel and the second impulse response of the channel, if the difference is that the first impulse response of the channel is different from the second impulse response of the channel is larger than the specified boundary value, (d) is formed, the average impulse response of the channel from the first impulse response of the channel and from the second impulse response of the channel, if they are sufficiently similar.

29. The transceiver on p. 28, characterized in that the means of channel estimation is performed in such a way that for every n-th time interval for transmission of interactive stations for n greater than 1, is not passed the test information sequence contained in the corresponding transmitted message for channel estimation if the first impulse response and the second impulse response sufficiently similar.

30. The transceiver under item 28 or 29, otlichalsya with specific additional information which is formed as a test of the information sequence contained in the messages transmitted in the frequency bands, (b) second estimated impulse response of the channel with the specific additional information that is generated as a test of the information sequence contained in the messages transmitted in the frequency bands, (c) is sufficient similarity between the first pulse response of the channel and the second impulse response of the channel, if the difference is that the first impulse response of the channel is different from the second impulse response of the channel is larger than the specified boundary value, (d) the rate referred to the appropriate frequency band mobile interactive stations, made in the form of a transceiver, is defined as slow, if the first impulse response of the channel and the second impulse response of the channel is sufficiently similar, (e) is formed by the conversion table indicating the relationship between the correlation coefficient and velocity, (f) a predefined number of consecutive estimated impulse response of the channel is estimated on the basis of the conversion tables.

31. A transceiver for estimating transmission channels in wireless systems is Attica communication system, the transmission channel is a bidirectional message passing, distributed time intervals, together with the channel estimation is designed to estimate the impulse responses of the channels for time intervals with specific additional information, which is shaped in the form of test information sequences, each of which is contained in the message, characterized in that the means of channel estimation is performed in such a way that (a) the first pulse response of the channel is estimated for a first time interval of the reception, (b) a second impulse response of the channel is estimated for the second time interval of the reception, (c) set a sufficient similarity between the first pulse response of the channel and the second impulse response of the channel, if the difference is that the first impulse response of the channel is different from the second impulse response of the channel is larger than the specified boundary value, (d) for each of the n-th time interval for transmission of interactive stations for n greater than 1, is not passed the test information sequence contained in the corresponding transmitted message for channel estimation if the first impulse response and the second impulse response in the subject so that (a) is measured first impulse response of the channel with the specific additional information that is generated as a test of the information sequence contained in the messages transmitted in the frequency bands, (b) second estimated impulse response of the channel with the specific additional information that is generated as a test of the information sequence contained in the messages transmitted in the frequency bands, (c) is sufficient similarity between the first pulse response of the channel and the second impulse response of the channel, if the difference is that the first impulse response of the channel is different from the second impulse response of the channel is larger than the specified boundary value, (d) the rate referred to the appropriate frequency band mobile interactive station is made in the form of a transceiver, is defined as slow, if the first impulse response of the channel and the second impulse response of the channel is sufficiently similar, (e) is formed by the conversion table indicating the relationship between the correlation coefficient and velocity, (f) a predefined number of consecutive estimated impulse response of the channel is estimated on the basis of the table is between the transceiver and interacting with the station, made in the form of a transceiver of a communication system, the transmission channel is a bidirectional message transmission in frequency bands, together with the channel estimation is designed to estimate the impulse response of the channel with the specific additional information, which is shaped in the form of test information sequences, each of which is contained in the message, characterized in that the means of channel estimation is performed in such a way that (a) is measured first impulse response of the channel with the specific additional information that is generated as a test of the information sequence contained in the messages transmitted in the frequency bands, (b) estimated second impulse response of the channel with the specific additional information that is generated as a test of the information sequence contained in the messages transmitted in the frequency bands, (c) is sufficient similarity between the first pulse response of the channel and the second impulse response of the channel, if the difference is that the first impulse response of the channel is different from the second impulse response of the channel is larger than the specified boundary value, (d) the rate referred to soothsayers slow if the first impulse response of the channel and the second impulse response of the channel is sufficiently similar, (e) is formed by the conversion table indicating the relationship between the correlation coefficient and velocity, (f) a predefined number of consecutive estimated impulse response of the channel is estimated on the basis of the conversion tables.

34. The transceiver according to any one of paragraphs.23, 28-33, wherein the communication system is a communication system based on MDR/mdcr.

35. The transceiver according to any one of paragraphs.24-27, wherein the communication system is a communication system based on mdcr.

36. The transceiver under item 34 or 35, characterized in that the method of multiple access is mdcr with joint detection.

37. The transceiver according to any one of paragraphs.23-36, wherein a represents a base station or mobile station.

38. The transceiver according to any one of paragraphs.23, 25-33, wherein the interactive station is made in the form of a transceiver is a mobile station or base station.

39. The transceiver according to any one of paragraphs.27, 30, 32, 33, characterized in that the transceiver is a base station station.

40. The transceiver according to any one of paragraphs.25, 28, 31, characterized in that the first period of reception and the second time interval of the reception directly follow each other.

41. The transceiver according to any one of paragraphs.25, 28, 31, characterized in that the first period of reception and the second period of reception are in the same frame mdvr.

42. The transceiver according to any one of paragraphs.25, 28, 31, characterized in that the first period of reception and the second period of reception are in different frames mdvr.

43. The transceiver according to any one of paragraphs.26, 29 or 31, characterized in that the number n is 2.

 

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FIELD: radio communications.

SUBSTANCE: proposed method intended for single-ended radio communications between mobile objects whose routes have common initial center involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from mobile object, these intermediate transceiving drop stations being produced in advance on mentioned mobile objects and destroyed upon completion of radio communications. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning of several radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

1 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer from mobile object to stationary one residing at initial center of common mobile-object route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from mobile object, these intermediate transceiving drop stations being produced in advance on mobile object. Proposed radio communication system is characterized in reduced space requirement which enhanced its effectiveness in joint functioning with several other radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 6 dwg

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile object from stationary one residing at initial center of mobile-object route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from mobile object, these intermediate transceiving drop stations being produced in advance on mobile object. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning with several other radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 6 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method for single-ended radio communications between mobile objects whose routes have common initial center involves use of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from mobile objects. Proposed radio communication system is characterized in reduced space requirement and, consequently, in enhanced effectiveness when operating simultaneously with several other radio communication systems.

EFFECT: reduced mass and size, enhanced noise immunity and electromagnetic safety for attending personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile objects from stationary one residing at initial center of common mobile-objects route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from first mobile object. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in simultaneous functioning of several radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile objects from stationary one residing at initial center of common mobile-objects route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from first mobile object, these intermediate transceiving drop stations being produced in advance on first mobile object. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning with several other radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method for single-ended radio communications between mobile objects having common initial center involves use of low-power intermediate transceiver stations equipped with non-directional antennas and dropped from mobile objects. Proposed radio communication system is characterized in reduced space requirement and, consequently, in enhanced effectiveness when operating simultaneously with several other radio communication systems.

EFFECT: reduced mass and size, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile objects from stationary one residing at initial center of common mobile-objects route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from first mobile object, these intermediate transceiving drop stations being produced in advance on first mobile object and destroyed upon completion of radio communications between mobile and stationary objects. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning with several radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications engineering; digital communications in computer-aided ground-to-air data exchange systems.

SUBSTANCE: proposed system designed to transfer information about all received messages irrespective of their priority from mobile objects to information user has newly introduced message processing unit, group of m modems, (m + 1) and (m + 2) modems, address switching unit, reception disabling unit whose input functions as high-frequency input of station and output is connected to receiver input; control input of reception disabling unit is connected to output of TRANSMIT signal shaping unit; first input/output of message processing unit is connected through series-connected (m + 2) and (m + 1) modems and address switching unit to output of control unit; output of address switching unit is connected to input of transmission signal storage unit; t outputs of message processing unit function through t respective modems as low-frequency outputs of station; initialization of priority setting and control units, message processing unit clock generator, and system loading counter is effected by transferring CLEAR signal to respective inputs.

EFFECT: enhanced efficiency due to enhanced throughput capacity of system.

1 cl, 2 dwg

FIELD: radiophone groups servicing distant subscribers.

SUBSTANCE: proposed radiophone system has base station, plurality of distant subscriber stations, group of modems, each affording direct digital synthesizing of any frequency identifying frequency channel within serial time spaces, and cluster controller incorporating means for synchronizing modems with base station and used to submit any of modems to support communications between subscriber stations and base station during sequential time intervals.

EFFECT: enhanced quality of voice information.

12 cl, 11 dwg

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