Apparatus and method for transmitting and receiving signals using adaptive systems

 

(57) Abstract:

The invention provides reception and transmission of signals in the communication system, for example in a cellular communication system. The antenna has a radiation pattern, which adaptively responds to the characteristics of the propagation channel between the communication stations in the communication system. The directivity of the adaptive antenna is selected in accordance with the propagation characteristics. When the characteristics of the distribution indicate the presence of a channel with only a small signal components of multipath propagation, is chosen vysokonapolnennyh the antenna pattern, and when the characteristic of the distribution indicate the presence of significant signal components of multipath propagation, the antenna pattern is changed to less than directed. The technical result - improving the efficiency of the system of systems, reducing the effect of noise and interference on the received signal and reduce interference to other network elements in the transmission signal. 3 S. and 21 C.p. f-crystals, 7 Il.

The present invention relates to a communication system such as a cellular communication system. More specifically, the present izobreteny is in the communication system, using antennas with adaptive characteristics of the pattern. The characteristics of the beam are adaptive, responsive at least in part on characteristics of the radio channels on which signals of a radio communication system is transmitted in the process of functioning of the system.

The communication system includes at least a transmitter and receiver connected by a communication channel. Generated by the transmitter of the communication signals containing the information transmitted over the communication channel for reception by the receiver. The receiver recovers the information content of the communication signal.

Wireless communication system or the communication system is a system in which the communication channel is a radio channel defined by the used frequency spectrum of electromagnetic waves. A cellular communication system is an example of a wireless communication system. The communication signal transmitted over the air, is formed by combining signals, i.e., the modulation of the carrier wave of information that must be transmitted. The receiver recovers the information by performing the reverse procedure, i.e., demodulation of a communication signal to recover information but more accurately, the receiver provides recovery information content of the signal transmitted by the transmitter.

The communication signal transmitted by the transmitter to the receiver, when receiving his receiver must have at least the energy level and the level of signal quality, which restores the receiver to the transmitted signal.

The signal from the receiver feels scattering, diffraction, reflection and attenuation during propagation through the transmission channel. As a result of reflections of the transmitted signal, the receiver often receives the signal actually represents the sum of the signal components transmitted by various routes of distribution, in addition to the direct route along the line of sight. Sometimes the track forward propagation of the signal on the line of sight is blocked, and the signal actually received by the receiver, is formed only of the reflected signal components.

Because the signal actually received by the receiver, may be the sum of the signal components transmitted via multiple propagation paths, the communication channel is sometimes defined as the channel multipath propagation and signal actually pinioned is a set of signal traces, passing between the transmitter and the receiver.

The energy levels of the signal components of the multipath signal dependent on slopes, which extend above mentioned components. Power, i.e., the value associated with the energy level of the signal component of the direct propagation path is determined by the equation Maxwell's electromagnetic field. The power of the reflected signal component is determined by the radar equation. Therefore, while the power of the signal component of direct distribution or difragirovavshej signal component decreases according to the function of the second (or higher) degree of distance from the transmitter, the power of the reflected signal component is reduced according to the function of the fourth (or higher) degree of distance from the transmitter.

As a result, increasing the distance from the transmitter to the receiver the reflected signal components, which are considerably longer than its than the signal component of direct distribution, progressive attenuated to a greater extent than the signal component of direct distribution. When the distance separating the transmitter from the receiver, large reflected signal to costaestrigalis as "point source".

Non-directional (or "Omni-directional" antenna typically provides the best recovery of the information contained in the signal transmitted by the transmitter, when the reflected signal components (also called components of multipath propagation) form a significant portion of the signal received by the receiver. Conversely, the directional antenna can be used when the signals received by the receiver, do not contain significant levels of the signal components of multipath propagation.

As mentioned above, the cellular communication system is a wireless communication system. Cellular communication system contains a multitude of spaced stationary transceivers, called base stations, distributed over a certain area. Each base station serves a part of this territory, defined as a cell. Roaming or mobile transceiver, called mobile device, can be located in any position within any cell on the above mentioned territory served by the cellular communication system. Mobile device with so its location can transmit the communication signals, at the th cell to another, switches the communication channel that the mobile device from one base station to another. This means that when a mobile device that communicates with the first base station, out of the cell served by the first base station, and is included in the cell served by the second base station, the mobile device starts to communicate with the second base station. Switching from the first base station to the second base station occurs automatically and without any apparent break in communication with the cellular communication system.

In a typical case, each of the base stations of the cellular communication system includes an antenna device for transmitting signals to mobile stations located within the cell, and receiving signals from the mobile stations. The signals actually received by the base station, are sometimes complex interference diagram generated by multiple reflections of the signal transmitted from the mobile device for a variety of different propagation paths of multipath channel. Thus, the source of the transmitted signal, i.e. the mobile device in such cases is for the base station as a "long" history is, separating the mobile device from the base station increases the power of the multipath signal components is becoming weaker relative to the signal transmitted by direct route distribution from the mobile device to the base station. In such cases, the mobile device appears in the base station as a signal source having a relatively small length. And as the distance separating the mobile device from the base station continues to grow, the mobile device will be reported to the base station as a "point" source.

A base station with a directional antenna, in which the configuration of the pattern formed by such a directional antenna, includes an elongated main beam will provide the best reception of signals transmitted by the remote mobile device. However, when a mobile device is near the base station, the base station having a non-directional antenna configuration which is characterized by a wider main beam, the model will provide a more effective signal generated by the mobile device, as the signal components of Megalochori> Although some existing base stations contain directional antennas, such directional antennas are immutable characteristics. That is, the configuration of the antenna beam usually have a nominally constant form.

Although controlled or adaptive antenna device is known, however, such an antenna device, in principle, used in radar and in astronomy.

In radar systems, signal pulse, i.e. the transmitted pulse, in a typical case, is transmitted from a known location at a known time and in a known direction. The radar system detects the signal pulse reflected from the target, i.e., the reflected pulse. The goal typically is located at a considerable distance from the location from which transmitted the transmitted pulse, and so the goal can be considered as a point source. Information associated with the source position, the transmission time of the transmitted pulse and the direction of transmission of the transmitted pulse, is used in the processing of the reflected pulse. The target speed determined by Doppler shift can be determined, for example, in such a way. Since the purpose of forming a point istochniki accurate positioning purpose.

In astronomical applications also typically use directional antennas. Directional antennas are used to detect signals generated by the remote signal sources, which can also be considered as point sources.

In both of these applications that use adaptive directional antenna, the signal components of multipath propagation are undesirable because such components can lead to the formation of false targets in the radar system. In order for such a system is the increased resolution, which is determined by the location of the remote source.

Managed the antenna system is also proposed for cellular systems. In such systems, the antenna gain in the elongated beam pattern of the antenna can provide an acceptable level of power in the direction of the remote mobile device and registrovat mutual interference with other mobile devices using the same frequency in another cell (which may be in different directions relative to the base station). It uses a beam with effectively constant feature is the use of mechanical, electronic and other means. In the prior art it is known adaptive summation of components in each of the many elements of a phased antenna array after conversion of its components with the phase and/or amplitude modulation for the adaptive formation of arbitrary characteristics of the pattern, wherein the antenna system provides a zero gain in the direction of one or more sources of interference that is offset from the axis of the antenna. This method is sometimes defined as the adaptive formation of zeros in the antenna pattern. This means that the characteristics of the pattern are formed so as to registrovat many other sources.

As more and more wide spread cellular communication networks, and other wireless communication systems, increasing the scope of application of such systems require effective use of the radio frequency channels allocated for communication in these systems. In the case of a cellular communication system base station of the cellular communication system with an antenna, the characteristics of which depend on the propagation characteristics of the communication signals transmitted between the mobile is s wireless communication systems can also benefit from the use of such antennas.

In light of the above prior art wireless communication systems such as cellular communication system, it is necessary to consider the significant improvements provided by the present invention.

The invention

The present invention relates to a device and method for communication in a wireless communication system, such as a cellular communication system. The invention uses the directional antenna with adaptive characteristics of the pattern. Due to the fact that the characteristics of the antenna are adaptive, these characteristics of the antenna can be selected so that to provide better transmission and reception of information transmitted during the operation of the communication system.

In accordance with one aspect of the invention, the device and associated method for use in a communication system having a first communication station and at least one second communication station. The device is associated with the first transceiver to transmit the communication signals on the radio channel between the first and second communication stations. The power characterization of the distribution determines charanjeet characteristic, adaptive responsive to the characteristics of the distribution defined by the block determining propagation characteristics.

According to another aspect of the invention, a base station radio signals and direct lines of communication, at least one mobile device and receives from him the signal return line. Schema transceiver form signals a straight line and process signals a return line connection upon reception. Unit to determine the distance responsive to the selected signals a return line that is processed by the circuits of the transceiver. The power distance definition defines the value representing the distance separating the mobile device from the transceiver. With circuits of the transceiver connected to the antenna, which has the characteristic of adaptive and responsive to the distance value obtained by the unit to determine the distance.

If, for example, the distance separating the mobile device from the transceiver, defined as a significant distance, the beam pattern of the antenna is extended, to ensure the provision of feedback signal lines of communication and to registrovat noise and interference signals coming from off-axis direction is e distance the configuration of the beam pattern of the antenna is chosen as less elongated, and the antenna characteristics approaching omnidirectional antenna. The antenna in this case provides better reception of signals coming from off-axis directions along the multipath propagation, formed between the mobile device and the base station.

Thus, as the characteristics of the antenna adaptively on the propagation characteristics of the communication channel, passing between the first and second communication stations, as the change in the characteristics of the propagation characteristics of the adaptive antenna is changed so that the best way to ensure adequate reception of signals transmitted between the transceivers. If the characteristics of the distribution channel show that there is a significant degree of multipath propagation, the characteristics of the antenna is chosen to facilitate the intake of most of the energy of the signal transmitted in this channel. If the propagation characteristics of the communication channel show that scattering is negligible, the characteristic of the antenna is selected so that rejecti aemy in the communication channel.

The invention is illustrated in the following detailed description of preferred embodiments of the invention illustrated by the drawings, and in the attached claims.

A brief description of the drawings, where

Fig. 1 is a functional block diagram of a communication system that uses the present invention;

Fig. 2A, 2B and 2C are graphical representations of various configurations of the beam pattern of the antenna, which can generate adaptive antenna corresponding to a possible variant embodiment of the invention;

Fig. 3 - view of the antenna array, partly in the form of functional blocks, partially in schematic form according to a possible variant embodiment of the invention;

Fig. 4 is a view of an antenna array, partly in the form of functional blocks, partially in schematic view, similar to Fig. 3, but with an increased number of antenna elements;

Fig. 5 is a view of an antenna array, partly in the form of functional blocks, partially in schematic form, similar to that shown in Fig. 3, according to which the signals in the antenna elements of an antenna array are shifted in phase to one another to form a flat Volnova the Fig. 7 is a functional block diagram of a base station radio communication corresponding to a possible variant embodiment of the invention, which can be used in a cellular communication system shown in Fig. 7.

Detailed description of preferred embodiments of the invention

In Fig. 1 shows a communication system 10, which uses the present invention. The communication system 10 is a wireless communication system or a communication system for information exchange between a transmitting position, which is represented here in the form of floating or rolling the remote transceiver 12, and receiver, presented in the form of a stationary set of transceiver 14. Although the illustrated embodiment shows two transceiver 12 and 14, however, in other embodiments, implementation of the transmitting station may be a transmitter, and the receiving station is only a receiver.

Communication signals generated in the transmitting transceiver unit 12 are transferred one by one from the set of radio frequency communication channels. Stationary set the transceiver 14 includes transceiver means 16, comprising transmitting the, what about whom the communication signals generated by the transceiver 12.

Communication signals generated by the transceiver 12, form RF signals are electromagnetic waves that can be transmitted on the RF channel.

The communication signals transmitted via RF channel transceiver 12, detected by the antenna device 18 associated with the stationary-located transceiver 14. The antenna device 18 converts the RF signals of electromagnetic waves into electrical signals, which are formed in line 22 and fed into the receiving unit transmitting means 16.

The control unit 24 is connected with the transmitting means 16 line 26 and the antenna device 18 by line 28. In the shown embodiment, the control unit 24 provides not only control of transceiver means 16, and functions as a device for determination of propagation characteristics, providing a characterization of the distribution channel of communication between the transceivers 12 and 14. Taking into account propagation characteristics in the communication channel determined by device characterization distribution, orprevent antenna device 18.

In one of the embodiments of the invention, if the distance between the transceivers 12 and 14 is relatively small, then select the main beam of the antenna directional diagram, which by its shape is close to omnidirectional. As the distance between the transceivers 12 and 14 increases, the selected geometric configuration of the main beam with increasing elongation.

The control unit 24 provides an adaptive change in the geometry of the beam pattern of an antenna device 18. Moreover, as changes in the characteristics of the communication channel between the transceiver configuration beam pattern of an antenna device may be modified to provide better communication between the transceivers 12 and 14.

The communication system 10 is an example of wireless communication systems of different types, in which the transmitting station transmits the communication signals to the receiving station. Communication system 10 may represent, for example, a cellular communication system in which the transceiver 12 is a mobile device, and the transceiver 14 to the base station radio that is associated with the telephone network of General use normal way.

In ohms and the base station radio communication in one or more radio frequency channels, subject to distortion due to multipath propagation and having significant levels. As mentioned above, the communication signal transmitted, for example, the mobile device to the base station, when receiving its base station is in fact a complex interference pattern formed by the combination of signal components of multipath propagation, transmitted to the base station through multiple propagation paths of the signals. As shown in Fig. 1, in addition to the signal component transmitted along a direct passage 32 along the line of sight, the signal components are also transmitted along with the reflection, for example, on highway 24, where the signal component of the transmitted signal undergoes reflection from the object 36. Route 34 comprises an area of incoming signal strength and phase of the reflected signal. The track 34 is shown for example only. A communication channel having a significant number of components of multipath propagation, contains many tracks, such as that shown highway 34.

In some cases, the track is short and direct signal between the mobile device and the base station is absent. If there are significant levels of distortion, obsto, not already represented by a point source. On the contrary, the mobile device appears to the base station as an extended source. In some cases, the mobile device may be a base station as occupying an angular sector of up to ten degrees. In such cases, the geometry of the primary beam pattern of the antenna, in this case, the antenna device 18 of the transceiver 14, is chosen less focused on its configuration, to permit the recovery of most of the energy of the signal being transmitted.

Radio direct transmission, such as the signal component transmitted by the highway 32, is determined by the equation Maxwell's electromagnetic field. Consequently, the field strength of the signal decreases in accordance with a power-law function, representing the first degree distance, and the power level is reduced as the second degree of distance, measured in free space. Dragirovaniya signal detects similar characteristics, however, the field intensity of the diffracted signal is further reduced as the energy passing through the gap, is distributed in space in a more significant degree, and this C is th distribution or the reflected signal is determined according to the radar equation, because the trail of multipath propagation consists of two or more segments. In the case of the track 34, as shown for example in Fig. 1, it is formed by the segment of the route the incoming signal and the trace of the reflected signal. Each of these segments has an impact on the power of the signal component transmitted through the channel multipath propagation, according to the power function of the second power of the distance multiplied by the reflection coefficient of the surface from which the reflected signal component. The power of the reflected signal component falls under the fourth power of the distance, as determined by the radar equation.

Therefore, the power levels of the direct signal propagation and signal multipath propagation is reduced as a function of distance in varying degrees with increasing distance between the mobile device and the base station. Thus the reflected signals become weaker and less significant relative to the component of direct distribution. Thus, the visible length of the mobile device to the base station decreases with increasing distance between the mobile device and the base is controlled by the communication channel by the transmitter, for example, the transmitter 12 shown in Fig. 1, and received by the receiver, such as receiver 14 shown in Fig. 1.

Distribution 38 on the angular coordinate, shown in Fig. 2A, characterizes the energy spectrum of the signal transmitted over the communication channel, characterized by a slight dispersion due to multipath propagation. The main part of the energy signal has an energy spectrum that is similar to the distribution 38. A remote signal source, therefore, has a similar distribution.

Distribution on the angular coordinate 40 and 42, shown in Fig. 2B and 2C, characterize the energy spectra of the signals transmitted via the communication channels, with considerable dispersion due to multipath propagation. The energy of the signal contained in a wider angular sectors. Close source reveals, therefore, a similar distribution.

The signals transmitted from the base station radio communication to the mobile device over the channel multipath propagation, has similar characteristics. That is, by increasing the distance between the mobile device and the base station signal components Mnogotochie is more than inconsequential relative to the signal component of direct distribution.

The antenna device of the base station, such as the antenna device 18, shown in Fig. 1, provides the best detection of signals transmitted over the channel with a narrow angular distribution, and the best way ensures transmission of signals to the mobile device when the geometry of the primary beam pattern of an antenna device is vysokonapornoj and includes an elongated main beam oriented in the direction of the remote mobile device. Conversely, when the energy distribution on the angular coordinate is long, the signal components of the multipath propagation of the signals transmitted between the base station and the mobile device, form a significant portion of the transmitted signal. The configuration of the antenna beam of an antenna device of a base station, such as the antenna device 18 that best provides for the detection of signals in close proximity of the mobile device, and the best way ensures transmission of signals to a nearby mobile device, when the geometry of the beam pattern of an antenna device is non-directional, i.e., when the configuration osnovnoj the antenna beam of an antenna device 18, the best way for communication between the transceivers 12 and 14 depends on the propagation characteristics of the communication channel between the transceivers. When the propagation characteristics of the communication channel such that the components of multipath propagation constitute a significant share of the signals transmitted between the transceivers, antenna pattern, providing omnidirectional, i.e., podlipny main beam that best provides the link between the transmitters. When, on the contrary, the propagation characteristics of the communication channel such that the components of multipath propagation form a relatively small proportion of the signals transmitted between the transceivers, antenna pattern, providing directional, i.e. elongated main beam that best provides the link between the transmitters.

Since there is a correlation between distance and recession of the power levels of the signal components of direct distribution relative to the signal components of multipath propagation, in one of the embodiments of the present invention adopts the definition of distances between transceivers of Britania distribution on the angular coordinate signals, accept the transceivers, is used to determine the propagation characteristics of the communication channel. In other embodiments, the implementation to determine the propagation characteristics of the communication channel used by the signal level or quality of signal.

In Fig. 3 shows an implementation option, in which the antenna device 18 forms the antenna grid and consists of two antenna elements 62 and 64. Phased array antenna formed by the antenna elements 62 and 64, determines the pattern 66 antennas. The antenna elements 62 and 64 form the radiating elements and receivers reverse lines of communication and work together to form the antenna either switched-beam or with a controlled beam that can be carried out in a known manner. In the configuration with a switched beam antenna pattern is selected using, for example, the physical delay that can be realized by changing the physical length of the supply lines to the antenna elements 62 and 64.

In Fig. 4 shows the antenna device in the form of an antenna array corresponding to another variant implementation of the present invention. In this embodiment, antenna array formed by the family and the identification of a radiation pattern of antenna 86, formed by the main beam, elongated relative to the longitudinal axis 88. And in this case, the antenna array may be performed either in the form of an antenna with switchable beam or antenna steered beam. The number of elements in the array can be selected in accordance with specific needs.

For example, a configuration 66 of the antenna beam, shown in Fig. 3, may be formed in the antenna array shown in Fig. 4, if only two of the antenna elements 68-84 selected for forming the active elements of the lattice. That is, the amplitude of the signal applied to the other antenna elements equal to zero. Fig. 3 and 4 are only examples of the many different means by which adaptive to change the geometry of the beam pattern of the antenna.

The configuration of the antenna beam can also be changed by introducing phase shifts in the signal at different antenna elements.

In Fig. 5 shows antenna array shown in Fig. 4 and formed by the antenna elements 68, 72, 74, 76, 78, 82 and 84. In this case, the antenna elements are arranged offset to one another from the baseline location for illustration f of the lattice. The magnitude of phase shifts of the signal applied to the elements 68-84 indicated by line segments 68-1, 72-1, 74-1, 76-1, 78-1, 82-1, 84-1 respectively. As shown in the drawing, the phase shifts of the signal applied to the upper three antenna elements, 68-74 positive, while the phase shifts of the signal applied to the lower three antenna elements 78, 82 and 84, is negative. The antenna pattern, formed by a lattice of antenna elements 68-84, newly defines an elongated beam.

In Fig. 6 shows a cellular communication system 110, which can be used in the present invention. The cellular communication system 110 contains many cells 112 defined geographic territory. Each cell 112 is determined by the base station radio 114. The base station 114 for purposes of illustration, is shown as arranged with the same spacing throughout the territorial area occupied by the system 110.

The base station 114 are connected through lines 116 with the switching center 118 mobile devices (CCMU). The switching center 118 is connected to the telephone network (PSTN) 119 via line 121.

Provided telephone connection between the subscriber placed in the calling station, and the emnd cellular communication system 110. Call to the selected mobile device 122 is routed to the base station 114 system 110 in the usual way.

As soon as the call is routed to the corresponding one of the base stations 114, the base station generates modulated signals, which are transmitted to the selected mobile device 122. After the mobile device 122 will respond to modulated signals transmitted thereto, is a telephone connection between the calling station and the called mobile device.

In Fig. 7 shows a base station 114 of the radio communication performed according to a possible variant embodiment of the invention. If the base station 114 is placed, as shown for example in Fig.7, the base station 114 together form a cellular communication system.

Antenna array comprising antenna elements 128, is connected with the base station 114 via diagrammatology circuit 130. Antenna array receives RF signals of the electromagnetic wave transmitted by the mobile device according to one or more radio frequency communication channels. Antenna array is made, for example, as an antenna with switchable beam or steered beam, as described above with reference to Fig. 3-4 and 5-6 respectively the cops 128. Diagrammatica circuit 130 may be performed, for example, in the form of a Butler matrix or Blass. Each output of the matrix corresponds to the beam, a dial-up in the usual way in a given direction of the beam. Signals received by antenna elements 128 are converted into electrical signals in lines 131, which are connected with diagrammable circuit 130 connected, in turn, with step-down Converter 134.

Step-down Converter 134 converts the usual manner with decreasing frequency signals on him, and generates the converted signal line 136. Line 136 is connected with the demodulator 138. The demodulator 138 usual demodulates the signals into him, and generates a demodulated signal on line 142, which is supplied to the corrector 144.

Corrector 144 provides a correction signal to him, and generates an adjusted signal line 145 is supplied to the error detector bit 148.

The detector error bits 148 also receives the demodulated signal generated by the demodulator in line 142. The detector error bits 148 detects errors in the bits in the received signal by comparing the input and output signals of the offset 1 is line 152.

Line 146, in which is given the adjusted signal generated by the corrector 144, is also associated with the decoder 154. The decoder 154 decodes the received signal and generates in line 156 decoded signal which is fed, for example, in the PSTN.

The control unit 162 is connected to line 152 and line 146 to obtain as indications of bit errors detected by the error detector bit 148, and the corrected signal generated by the corrector 144. The control unit is also connected by line 142 to receive a signal generated by the demodulator in line 142.

The control unit enables at least a determination of the propagation characteristics of the communication channel, which transmits signals to the base station.

In one cellular communication system, for example, the feedback signal line, generated by the mobile device synchronizes with the previously transmitted signal is a straight line. For example, in a cellular communication system GSM signal pre-emption synchronization (TA), passed in the operation of the GSM system can be used to determine the distance between the mobile device and the base station. The delay caused by the propagation velocity of the signal is conducted to obtain indication of the distance between the mobile device and the base station. In accordance with the obtained distance may be selected antenna pattern generated by the antenna elements 128.

The antenna pattern generated by the antenna elements 128 may be selected depending on the energy level of the reverse signal line received in the base station, indicating the degree distribution of the received signal on the angular coordinate. The signal level varies as a function of distance and propagation characteristics of the radio channel. If the power level with which the mobile device transmits a signal return line is known, the strength of the signal received at the base station, can be interpreted as a measure of the propagation characteristics of radio frequency communication channel on which the signal is transmitted. A strong signal or a signal experiencing a slight extension on the angular coordinate, indicates good conditions for the spread of the signal component of the direct transmission, for which the preferred antenna pattern characterized by major orientation. Lower signal levels or high levels of dispersion energy indicate what the La may also be determined by the control device 162, moreover, in this case, the control unit 162 performs the function block definitions level of the received signal.

The antenna pattern generated by the antenna elements 128, may also be made dependent on the distortion detected in the signal received by the base station, and the measured offset 144 channel. Similarly, the configuration pattern of the antenna can be made depending on the number of error bits detected by the error detector bit 148.

In yet another embodiment of the present invention, the pattern formed by the antenna elements 128 may be made depending on the combination of the distance between the mobile device and the base station, the dispersion energy of the received signal on the angular coordinate of the received signal and/or the number of error bits that indicate the quality of the decoded signal.

The control unit 162 generates a signal line 166, served on diagrammatology circuit 130. Diagrammatica circuit 130 is designed as a single element or a distributed element in each of the antenna elements 128. The device 130 includes or off the options 128, thereby obtaining the desired characteristics of the antenna directional diagram.

The base station also includes a transmitting circuit for transmitting signals straight line connection to the mobile device, in particular, as shown in the drawing, contains a boost Converter 168 to transform with increasing frequency supplied to him signals, for example signals from the PSTN, and the modulator 172 to modulate converted to higher frequency signals. The signals modulated by the modulator 172, served on the antenna formed of the antenna elements 128, to ensure transmission of the modulated signals to a remote mobile device.

Although the signals backward links do not necessarily have to be transmitted on the same RF channel, however, the choice pattern of the antenna when transmitting a base station signal direct line of communication to a mobile device can be carried out according to the method described above. In General, if the antenna is selected when the signal return line is narrow, the directivity of the antenna providing the best signal transfer straight line, in a typical case, there will be lines of communication with significant variance in the angular coordinate, i.e., the feedback signal line, for which the obvious significant levels of distortion associated with multipath propagation, does not provide an accurate indication of the direction of the narrow beam antenna for transmission after this signal is a direct line of communication to a mobile device.

Because the configuration of the antenna adaptive beam changes in accordance with the measurements of the propagation characteristics of the communication channel between the mobile device and the base station, the configuration of the antenna beam can be changed during successive time intervals (slots) one frame in the system multiple access with time division multiplexing (MDR) to ensure the best configuration of directional antennas for transmission and reception of signals transmitted by the sequential procedures of information exchange with a variety of mobile devices.

In a more General aspect, the variant of implementation of the present invention enables adaptive changes in the pattern of the antenna to improve the efficiency of the antenna system with a phased array or other antenna systems. The necessity of taking to the addressing pattern of the antenna, can now be excluded, since it has become possible adaptive changes of antenna directional diagram. In a variant, according to which the base station of the cellular communication system includes a device for adaptive changes of the geometry of the antenna directional diagram, communication with the selected mobile device is optimized in relation to the influence of noise and interference sources on the signal received by the base station, while reducing interference to other network elements, caused by the signals transmitted by the given base station.

Presents embodiments of the present invention are described in sufficient detail. This description of the preferred options are to ensure the implementation of the invention, the volume of the invention is not limited to the options presented in the description and the claims.

1. Device for transmission of communication signals on the radio channel between the first communication station and a second communication station in a communication system containing at least one first communication station, which is associated with the said device, and at least one second communication station, characterized in that it contains a unit oppo whom the communication signals between the first communication station and a second communication station, and the antenna device, connected to receive indications of the propagation characteristics defined by the said block defining characteristics of the distribution, and the antenna device ensures the formation of antenna directional diagram that, at least, in turn has at least a first configuration of the antenna beam and the second configuration of the antenna beam, the choice of the pattern provided by the specified antenna device, is determined by the said block defining characteristics of the distribution.

2. The device according to p. 1, wherein the block of determining the characteristics of the distribution determines the propagation delay of the communication signals transmitted over the radio channel between the first and second communication stations, respectively.

3. The device according to p. 2, characterized in that the communication signal transmitted by the second communication station to the first communication station determines the signal return line connection, and the communication signal transmitted by the first communication station to the second communication station determines the signal straight line, while the propagation delay determined by the block determining the characteristics of the distribution opredelyaytes the th link station and receiving at the first communication station of the selected feedback signal line, passed in response to the first signal connection.

4. The device according to p. 1, wherein the block of determining the characteristics of the distribution determines the value characterizing the distribution of the angular coordinate of the power of communication signals transmitted over the radio channel between the first and second communication stations, respectively.

5. The device according to p. 4, characterized in that the communication signal transmitted by the second communication station to the first communication station determines the signal return line, with the value determined by the block determining the characteristics of the distribution characterizes the distribution of the angular coordinate of the signal energy of the reverse link.

6. The device according to p. 1, wherein the block of determining the characteristics of the distribution determines the value characterizing the quality of the communication signals transmitted over the radio channel between the first and second communication stations, respectively.

7. The device according to p. 6, characterized in that the communication signal transmitted by the second communication station to the first communication station determines the signal return line, with the value determined by the block determining the characteristics of the distribution characterizes the AC is tion of the distribution determines the value characterizing the level of communication signals transmitted over the radio channel between the first and second communication stations, respectively.

9. The device under item 8, wherein the communication signal transmitted by the second communication station to the first communication station determines the signal return line, with the value determined by the block determining the characteristics of the distribution characterizes the signal strength of the reverse link.

10. The device under item 1, characterized in that the characteristics mentioned antenna represents the configuration of the beam pattern mentioned antenna.

11. The device under item 1, characterized in that the configuration of the beam of an antenna device is adaptively selected in accordance with the characteristics of the distribution.

12. The device under item 1, characterized in that the pattern mentioned antenna device includes many configurations of beams, each beam configuration defines the main beam of the antenna directional diagram, the configuration of the main beam is adaptively selected in accordance with the propagation characteristics defined in the said block defining a character who is adaptively chosen to form, at least either of the elongated main beam or headlining main beam.

14. The device according to p. 13, characterized in that the configuration of the main beam is adaptively chosen for the development of the selected main beam, the shape of which corresponds to the elongated main beam or newlistname the main beam.

15. The device under item 1, characterized in that the first communication station forms a base station of radio communication, the second communication station forms a transceiver having the ability to change the location, and the said block defining characteristics of the distribution associated with the base station radio as its constituent parts.

16. The device according to p. 15, characterized in that the said antenna device is associated with the base station radio.

17. The device under item 1, characterized in that the said antenna device comprises an antenna grid consisting of a set of antenna elements, with many antenna elements have the characteristics of elements, which together define the directional diagram of the antenna device.

18. The device according to p. 16, characterized in that the directional diagram of the antenna resh is on p. 17, characterized in that the directivity of the antenna array adaptive changes through adaptive changes in the number of antenna elements forming an antenna array.

20. The device according to p. 19, characterized in that the directivity of the antenna array adaptive changes by changing the phases of the signals supplied to the antenna elements of the antenna array.

21. The device according to p. 19, characterized in that the directivity of the antenna array adaptive changes by changing the amplitudes of the signals supplied to the antenna elements of the antenna array.

22. The device under item 1, characterized in that the radio channel contains a back-line and direct line of communication, and unit characterization determines the propagation characteristics of the reverse link.

23. The way of communication in the communication system containing a first communication station and at least one second communication station and the radio channel, which are transmitted radio signals between the first and second communication stations, and the method includes at least the reception of communication signals generated by the second communication station, wherein the determination is a function of communication on the radio channel, and choose the adaptive directivity of an antenna device in accordance with certain characteristics of the distribution, and as the beam is chosen, at least alternately to the first configuration of the antenna beam or the second configuration of the antenna beam.

24. The base station radio for transmitting signals straight line, at least one subscriber device and receiving signals a return line from the subscriber device, characterized in that it contains a transceiver for generating signals direct lines of communication and signal processing the return line, the block defining characteristics of the distribution, responsive to the selected signals a return line processed by the transceiver, and the said block defining characteristics of the distribution is intended to determine the value representing the propagation characteristics of the radio channels, which are transmitted communication signals between the subscriber device and said transceiver, and the antenna device associated with said transceiver, and the antenna device has a chart napravlennos is that the configuration of the antenna beam, the choice of the pattern specified antenna of the device is performed in accordance with the value defined in the said block defining characteristics of the distribution.

 

Same patents:

Line radio // 2160503
The invention relates to radio communications and can be used in space and terrestrial communication systems using spatial modulation

The invention relates to the field of frequency synthesis and can be used in the frequency synthesizer with a fractional value of the division factor

The invention relates to antenna arrays

The invention relates to telecommunication systems and can be used in the radio links with reuse frequency (PMP)

The invention relates to radio communications and can be used in space and terrestrial radio links

The invention relates to the field of radio engineering, in particular to an adaptive antenna systems (AAS)

FIELD: communications engineering.

SUBSTANCE: proposed system has user terminal, gateway, and plurality of beam sources radiating plurality of beams, communication line between user terminal and gateway being set for one or more beams. Proposed method is based on protocol of message exchange between gateway and user. Depending on messages sent from user to gateway, preferably on pre-chosen periodic basis, gateway determines most suited beam or beams to be transferred to user. Messages sent from user to gateway incorporate values which are, essentially, beam intensities measured at user's. Gateway uses beam intensities measured at user's to choose those of them suited to given user. Beams to be used are those capable of reducing rate of call failure and ensuring desired separation level of beam sources.

EFFECT: reduced rate of call failure in multibeam communication system.

20 cl, 27 dwg

FIELD: automatic adaptive high frequency packet radio communications.

SUBSTANCE: each high frequency ground station contains at least one additional high frequency receiver for "surface to surface" communication and at least one additional "surface to surface" demodulator of one-tone multi-positional phase-manipulated signal, output of which is connected to additional information input of high frequency controller of ground station, and input is connected to output of additional high frequency "surface to surface" receiver, information input of which is connected to common high frequency receiving antenna, while control input is connected to additional control output of high frequency controller of ground station.

EFFECT: prevented disconnection from "air to surface" data exchange system of technically operable high frequency ground stations which became inaccessible for ground communications sub-system for due to various reasons, and also provision of possible connection to high frequency "air to surface" data exchange system of high frequency ground stations, having no access to ground communication network due to absence of ground communication infrastructure at remote locations, where these high frequency ground stations are positioned.

2 cl, 12 dwg, 2 tbl

FIELD: planning data transfer in wireless communication systems.

SUBSTANCE: proposed method used for planning data transfer over incoming communication line for definite terminals of wireless communication system includes formation of definite set of terminals for probable data transfer, each set incorporating unique combination of terminals and complies with estimate-designed hypothesis. Capacity of each hypothesis is evaluated and one of evaluated hypotheses is chosen on capacity basis.

EFFECT: enhanced system capacity.

39 cl, 12 dwg

FIELD: mobile communication systems.

SUBSTANCE: system contains closed contour, thus expanding similar system with open contour and made with possible use of distancing technology during transfer with four antennas, and method for transferring signal in aforementioned system. Method for transferring signal in system for spatial-temporal distancing during transfer with closed contour, having several transferring antennas, includes: spatial-temporal encoding of symbols, meant for transfer; classification of encoded symbols in appropriate groups; and multiplication by different weight values of each group of transferred symbols and their transmission.

EFFECT: improved quality of communication.

5 cl, 5 dwg

FIELD: radio communications, possible use in space and ground communication systems, using noise-like signals.

SUBSTANCE: at transmitting side device features: first and second transmitter decoders, transmitter counter, first and second transmitter keys, transmitter phase inverter, OR circuit of transmitter, at receiving side device features: first and second receiver decoders, receiver counter, first and second receiver keys, receiver phase-inverter, OR circuit of receiver, first and second gates.

EFFECT: increased concealment of information being transferred.

4 dwg

FIELD: mobile communication system which uses adaptive antenna array circuit with a set of inputs and a set of outputs.

SUBSTANCE: in accordance to the invention, first receiver computes receipt value with usage of compressed signal received from receipt signal, to generate receipt beam of first receiver and computes weight value of transmission with usage of computed weight value of receipt to generate transmission beam of second transmitter, generating check connection information, which includes weight value of transmission. First transmitter transmits check connection information to second receiver. Second receiver receives check connection information, and second transmitter determines weight value of transmission from check connection information received in second receiver, and generates transmission beam which corresponds to weight transmission value, to transmit the signal by applying transmission beam to the signal.

EFFECT: provision of system and method for transmitting/receiving in mobile communication system using two-stage method for creating a weight value.

6 cl, 12 dwg

FIELD: onboard radio-systems for exchanging data, possible use for information exchange between aerial vessels and ground-based complexes in radio communication channels.

SUBSTANCE: complex of onboard digital communication instruments contains two receiver-transmitters of very high frequency broadcasting range, two receiver-transmitters of high frequency range, interface switching block, control block, modulator-demodulator (modem), control and indication panel, frequency-separation device of high frequency range and frequency-separation device of very high frequency range.

EFFECT: increased interference resistance of data, reduced level of collateral radio emissions and fulfilled electromagnetic compatibility requirements.

1 dwg

FIELD: method and device for receiving data in mobile communication system using a circuit for adaptive generation of receiving beam weight.

SUBSTANCE: in accordance to the invention, mobile communications system receives a compressed signal, produced from received signal, and determines first value of error, using first circuit in clock point, and second value of error, using second circuit, which is different from first circuit in clock point. The system determines weight of application of first circuit in accordance to difference between first value of error and second value of error and generates third value of error, using the circuit which combines first circuit and second circuit, and determines the weight of the receiving beam, using compressed signal, third error value and output signal.

EFFECT: realization of the device and method for generation of receiving beam with minimal error value in mobile communications system.

2 cl, 9 dwg

FIELD: information technologies.

SUBSTANCE: invention relates to the radio communications and can be used in wireless communications system. Signals are transmitted with party check code usage with low density. Raise supporting party check matrix with low density is formed with the help of elements value extension in party check matrix with low density with the help of submatrix, which conforms a number of transmitting aerials. Specific transmitting signals are coded with usage of supporting raise party check matrix with low density. After that, coded signals are conversed seria/parallel and transmitted through transmission aerials.

EFFECT: improvement of data jam resistance in channel with noises while high-speed transmission.

36 cl, 16 dwg

FIELD: communication technologies.

SUBSTANCE: detecting techniques for close components of multi-beam distribution are described. The techniques are aimed at prevention of channel merging without relative position monitoring between each of diversity channel set. Displacement limits are defined for each diversity channel. Temporary tracing commands are suppressed. Such commands may displace diversity channels beyond their displacement limits. Displacement limits are dynamically updated, with displacement limits for each diversity channel defined according to displacement limits of adjacent diversity channels.

EFFECT: prevention of diversity channel merging; increase in system efficiency and capacity and decreased improper use of system resources.

12 cl, 10 dwg, 1 tbl

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