Method of receiving signals in digital communication system with compensation of noise defined by multiple-beam interference

FIELD: radio engineering, communication.

SUBSTANCE: method includes performing the following operations: by a test pulse, located in a fragment of message reception time interval known in the receiving end of the communication system, the ICR estimation operation is performed, each k-th time-based IN realisation, corresponding to each allowable k-th TSE alternative, is formed. This formation of IN realisations is performed taking into account the result of the ICR estimation, forming an array of differences {δk(t)}, between the analyzed TSE and each of the k-th of the indicated IN realisations separately, for each of these differences δk(t) they form the k-th decisive statistics (PC) zk, and based on the totality of these PCs they make a decision about which particular TSE is adopted. Each kth PC zk are formed by calculating the correlation between the k-th realisation of the δk(t) difference and the corresponding k-th TSE alternative, and the decision, about which particular TSE is adopted, is carried out by determining the index k =k0 for that of the collection PC zk0, which satisfies the condition zk0=maxk{zk}.

EFFECT: increase of noise immunity of reception of signals of digital communication during the operation of a communication system in the presence of multiple-beam interference.

3 dwg

 



 

Same patents:

FIELD: information technologies.

SUBSTANCE: method contains the following stages: on transmitting side they download orthogonal codes in lines from a number of multiuser communication lines, signals are sent as loaded with these codes, which correspond to lines, on receiving side they receive information on vector of transient noise according to vector of actually received signal, and quantitative value of transient noise is identified on the side of a certain line out of mentioned lines. System contains transmitting device, which sends test signals loaded with orthogonal codes, and receiving device, which receives test signals and calculates quantitative value of transient noise.

EFFECT: detection of transient noise among multiple lines for optimisation of lines operation.

13 cl, 12 dwg

FIELD: information technologies.

SUBSTANCE: mobile device of wireless communication and methods for it include signal reception, saving of received signal part, identification of all possible pilot-signals by means of determination of information on slot border for saved part of signal, determination of information on frame border and/or information of scrambling code from saved part of signal by means of correlation of saved signal part with scrambling codes on the basis of information on slot border. In other versions of realisation searching is done in real time without signal saving.

EFFECT: increased probability of signal detection.

22 cl, 7 dwg

FIELD: communication systems.

SUBSTANCE: proposed method includes dynamic control of subscriber station transmitter considering noise level in vicinity of base station location and information load on base station by estimating quality of communication channel and accounting for network subscriber priority.

EFFECT: enhanced reliability of mobile communication system.

1 cl, 2 dwg

FIELD: modulation methods, possible use during transmission and receipt of information signals.

SUBSTANCE: in accordance to method, as encoding transformation, comparison of several bits of parallel, serial digital code or information units to sample of analog signal of given duration and certain shape is used.

EFFECT: direct transformation of digital signal or units of information by means of precisely generating analog signal from samples known in advance.

3 cl, 2 dwg

FIELD: broadband cell radio communication systems, possible use for correcting frequency of supporting generator of mobile stations, necessary for provision of coherent message receipt mode.

SUBSTANCE: serial cyclic procedure of estimating mismatch and its compensation uses original algorithm for determining maximum of solving function by two of its values from the area where frequency is undetermined, thus making it possible to decrease frequency mismatch compensation time. Proposed procedure has increased interference resistance, because it uses additional digital supporting signal. Proposed algorithm can function with different, including substantial, values of original frequency mismatch. Algorithm is efficient both at beginning stage (in frequency capture mode) and during following automatic adjustment. Proposed variant of realization of frequency automatic adjustment allows precise adjustment of frequency of supporting generator even in case of very low signal-noise ratio for signal being received.

EFFECT: increased precision of estimation of frequency of input multi-beam signal, including cases with substantial frequency mismatches.

3 cl, 9 dwg

The invention relates to the field of radio and can be used in the mobile communication system mdcr for the formation of complex quasiorthogonal codes and to expand channel data using a set of complex codes quasiorthogonal

The invention relates to the field of digital information and can be used to implement multi-channel modems with parallel multi-frequency composite orthogonal signals

The invention relates to telecommunications, and is intended for the transmission of discrete information with a noise-like signals

The invention relates to cellular telephone systems, specifically to a system for increasing the reliability of the cellular telephone system in environments with multipath transmission of signals, or in conditions in which a large number of mobile phone units simultaneously try to access the base station

FIELD: physics, communications.

SUBSTANCE: invention relates to wireless communication and can be used for generating precoding unitary matrices for a MIMO system. Described are systems and techniques which enable calculation of the precoding index which in a certain relationship with the precoding matrix in the code book. According to various aspects, systems and/or methods which enable calculation the effective signal-to-noise ratio (SNR) are described. Such systems and/or methods can additionally enable selection of the precoding matrix and the corresponding precoding index. Such systems and/or methods can also enable use of a precoding matrix in a wireless communication MIMO system.

EFFECT: simplification of the algorithm related to calculation of the precoding index in a wireless communication MIMO system.

45 cl, 10 dwg

FIELD: information technologies.

SUBSTANCE: mobile station of data switching and record traffic contains switching device of channels and communication lines, satellite communications station with antenna system, VHF radio station with antenna, user's set, control console, portable radio station with built-in antenna, two encryptors, station master automated workstation consisting of portable computer and small-size printer, two channel equipments, dial telephone set, first, second and third VHF radio station of multichannel communication with units of aerial filters and broadband antennas, two vocoders, wireless modem, first and second VHF receiving sets with antennas, navigation equipment with antenna, high speed radio channels encryptor, basic multichannel data transmission station (DTS), automated work station of data transmission operator being a part of control console of data transmission station, two facsimiles, telephone communication switch, exchange lines of direct communication, telephones of local battery system, block of cable entry, junction lines, telecommunication line, basic station of pager communication with antenna and receivers of personal radio call.

EFFECT: functionality enhancement.

1 dwg

The invention relates to electrical engineering and can be used in the transmission and reception of information VLF-band using broadband random signals with sequential switching frequencies and error-correcting correcting coding and functioning under the influence of a pulsed, focused on the spectrum, signatory interference and white Gaussian noise

Telegraph // 2025902

FIELD: information technologies.

SUBSTANCE: mobile station of data switching and record traffic contains switching device of channels and communication lines, satellite communications station with antenna system, VHF radio station with antenna, user's set, control console, portable radio station with built-in antenna, two encryptors, station master automated workstation consisting of portable computer and small-size printer, two channel equipments, dial telephone set, first, second and third VHF radio station of multichannel communication with units of aerial filters and broadband antennas, two vocoders, wireless modem, first and second VHF receiving sets with antennas, navigation equipment with antenna, high speed radio channels encryptor, basic multichannel data transmission station (DTS), automated work station of data transmission operator being a part of control console of data transmission station, two facsimiles, telephone communication switch, exchange lines of direct communication, telephones of local battery system, block of cable entry, junction lines, telecommunication line, basic station of pager communication with antenna and receivers of personal radio call.

EFFECT: functionality enhancement.

1 dwg

FIELD: physics, communications.

SUBSTANCE: invention relates to wireless communication and can be used for generating precoding unitary matrices for a MIMO system. Described are systems and techniques which enable calculation of the precoding index which in a certain relationship with the precoding matrix in the code book. According to various aspects, systems and/or methods which enable calculation the effective signal-to-noise ratio (SNR) are described. Such systems and/or methods can additionally enable selection of the precoding matrix and the corresponding precoding index. Such systems and/or methods can also enable use of a precoding matrix in a wireless communication MIMO system.

EFFECT: simplification of the algorithm related to calculation of the precoding index in a wireless communication MIMO system.

45 cl, 10 dwg

FIELD: information technology.

SUBSTANCE: disclosed methods of binary information transmitting and receiving over radio communication channels in non-automatic mode under conditions of concentrated, noise and deliberate interferences relate to radio communication technique. Technical result consists in improvement of noise immunity and energy concealment of received information. Under conditions of concentrated and noise interferences disclosed is sequence of actions, which is displayed at receiving side with different slope gradients, not coinciding with gradient of lines, displaying concentrated interferences on spectrogram in "time-frequency" plane. Under conditions of deliberate interferences, using working frequencies intra-bit pseudorandom retuning mode with reduction of frequency chip duration to time, smaller than electronic countermeasures system response time, which enables to perform actual transition from channel with targeted deliberate interference to channel with random focused interferences, on background of which signal selection is carried out by visual identification of received binary packages, which visual image on spectrogram differs from interferences displaying by their slope gradients and other characteristics.

EFFECT: wherein disclosed methods noise immunity and energy concealment increasing depends not only on selected frequency range, radio channel state, noise level exceeding above signal level, but also on duration of binary packages, number of frequency chips used for their generation, as well as counteracting system capabilities.

4 cl, 10 dwg

FIELD: radio engineering, communication.

SUBSTANCE: method of dynamic searching for mobile subscribers includes the steps of forming a search plan in the form of a stochastic matrix, selecting an outgoing element of the communication network, taking into account the prediction of the subscriber movement for a certain time interval, the results of previously served callers and periodically transmitted over the communication network of service information.

EFFECT: expanding the capabilities of the prototype method, increasing the reliability of subscriber search on networks, taking into account the possibility of unexpected change of subscriber location on the networks and the need to search for subscribers on heterogeneous communication networks.

2 dwg, 2 tbl

FIELD: radio engineering, communication.

SUBSTANCE: method of diagnosing cyclic codes involves selecting a certain number of code blocks and analysing different pairs of the code blocks. By means of a cyclically repeated procedure for shifting one of the polynomials describing the code blocks and bitwise addition modulo 2 of the polynomial pair to be processed, it is possible to find the common polynomial of the pair under consideration. The results of each analysis procedure are recorded, and after a sufficient number of procedures is performed, the number of results obtained for each detected type of common polynomials is compared. The desired generating polynomial is common to all code blocks and appears for the largest number of times. This is detected and used as a result of diagnosis.

EFFECT: increasing the noise immunity of information transfer.

2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: method includes performing the following operations: by a test pulse, located in a fragment of message reception time interval known in the receiving end of the communication system, the ICR estimation operation is performed, each k-th time-based IN realisation, corresponding to each allowable k-th TSE alternative, is formed. This formation of IN realisations is performed taking into account the result of the ICR estimation, forming an array of differences {δk(t)}, between the analyzed TSE and each of the k-th of the indicated IN realisations separately, for each of these differences δk(t) they form the k-th decisive statistics (PC) zk, and based on the totality of these PCs they make a decision about which particular TSE is adopted. Each kth PC zk are formed by calculating the correlation between the k-th realisation of the δk(t) difference and the corresponding k-th TSE alternative, and the decision, about which particular TSE is adopted, is carried out by determining the index k =k0 for that of the collection PC zk0, which satisfies the condition zk0=maxk{zk}.

EFFECT: increase of noise immunity of reception of signals of digital communication during the operation of a communication system in the presence of multiple-beam interference.

3 dwg

FIELD: broadband cell radio communication systems, possible use for correcting frequency of supporting generator of mobile stations, necessary for provision of coherent message receipt mode.

SUBSTANCE: serial cyclic procedure of estimating mismatch and its compensation uses original algorithm for determining maximum of solving function by two of its values from the area where frequency is undetermined, thus making it possible to decrease frequency mismatch compensation time. Proposed procedure has increased interference resistance, because it uses additional digital supporting signal. Proposed algorithm can function with different, including substantial, values of original frequency mismatch. Algorithm is efficient both at beginning stage (in frequency capture mode) and during following automatic adjustment. Proposed variant of realization of frequency automatic adjustment allows precise adjustment of frequency of supporting generator even in case of very low signal-noise ratio for signal being received.

EFFECT: increased precision of estimation of frequency of input multi-beam signal, including cases with substantial frequency mismatches.

3 cl, 9 dwg

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