Method of decoding cyclic codes with "hard" pointer vector solution and device therefor

FIELD: radio engineering, communication.

SUBSTANCE: device comprises a syndrome and pointer vector computing unit, a correction vector generating unit, an error vector initial element generating unit, a current syndrome and current pointer vector computing unit, a correction vector generation completion unit, an error vector continuation element generating unit, a correction unit, a unit for selecting the systematic portion of a codeword and random-access memory.

EFFECT: faster cyclic code decoding.

4 cl, 1 dwg

 



 

Same patents:

FIELD: information technology.

SUBSTANCE: method includes receiving, by user equipment (UE), carrier activation commands or carrier deactivation commands in an n-th downlink subframe; determining, by the UE, an updated downlink activated carrier as a set of current downlink activated carriers, beginning with the (n+k) uplink frame, wherein the set of updated downlink activated carriers is a downlink activated carrier updated after the UE receives carrier activation commands or carrier deactivation commands in the n-th downlink subframe, where n and k are positive integers, and k is greater than or equal to 5; sorting, by the UE, uplink control information (UCI) of each downlink carrier for X downlink carriers in accordance with a given rule, where X is a positive integer; and X downlink carriers belong to the set of current downlink activated carriers of the UE; transmitting, by the UE, the sorted UCI for X downlink carriers to a base station.

EFFECT: fewer errors when decoding uplink control information.

16 cl, 15 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a method, an apparatus and a system for configuring control channels in a mobile communication network and at a mobile station. The invention provides aligning the size of the control channel information of different formats with an equal number of coded control channel information bits and/or modulation symbols for each control channel. The control channels may contain scheduling-related control information. According to another aspect of the invention, a more flexible solution is proposed which allows taking different geometries of mobile stations in a cell into account. Similar to the aspect above, the size of the control channel information is aligned through modulation and/or coding, although the control channel information is aligned to one out of a set of numbers of coded control channel information bits and/or modulation symbols for each control channel.

EFFECT: improved control channel configuration scheme, particularly control channels relating to transmission of user data.

4 cl, 19 dwg, 14 tbl

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a method of data transmission in a wireless communication system with hybrid automatic request for repetition (HARQ). Assessment bias compensation CQI is performed by processing of HARQ receipts (7), a signal-code sequence (SCS) is chosen based on compensated assessment CQI, coding of a data batch (6) is performed by its help, after that, the first attempt of transmission of the batch of coded data to a receiver (4) is performed via a forward channel (2), the success of which is determined as per the type of HARQ receipt (7) received from the receiver (4) via a backward channel (3) in response to this attempt. In case the received HARQ receipt (7) is not positive, repeated attempt of batch transmission is performed via the forward channel (2). In order to provide the adaptive compensation of bias of assessment CQI, the first measure (S) is determined using at least two last HARQ receipts and based on it there determined is a value of a factor of coarse compensation, the second measure (T) is determined using at least one of the last HARQ receipts and based on it there determined is a value of a factor of fine compensation, a reset operation of the value of the fine compensation factor is performed till the initial value at the change of the current value of the coarse compensation factor and CQI assessment is changed considering values of the obtained values of the coarse compensation factor and the fine compensation factor.

EFFECT: providing control of the level of successful delivery of data from the first try of transmission; improving the efficient use of radio resources and speed of data transmission in a wireless communication system as a whole.

17 cl, 5 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to a method for wireless transmission of data and control information using a plurality of transmission levels. The method includes determining the number of bits in one or more codewords (122) of user data to be transmitted during a subframe, and calculating the number of control vector symbols (124) for allocation for control information during said subframe. The number of control vector symbols (124) is calculated based at least in part on the number of bits in one or more codewords (122) of user data to be transmitted during said frame, and estimation of the number of vector symbols (124) to which one or more codewords (122) of user data are to be mapped. Estimation of the number of vector symbols (124) depends at least in part on the number of control vector symbols (124) to be allocated for control information. The method also includes mapping one or more control codewords (120) to a calculated number of control vector symbols (124) and transmitting the vector symbols (122) of user data and control vector symbols (124) on a plurality of transmission levels during said subframe.

EFFECT: providing optimum allocation of transmission resources when there is need to transmit a large amount of control information.

30 cl, 7 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a method for wireless transmission of data and control information using multiple of transmission layers. The method includes determining the number of bits in one or more codewords of user data (122) transmitted in a subframe and calculating, for each control signal from M, transmitted in the subframe, a value (Q') based at least in part on the number of bits in one or more codewords of user data (122) and estimating the number of vectors of symbols of user data (124) to which one or more codewords of user data (122) are mapped. Estimation of the number of vectors of symbols of user data (124) for a specific control signal from M depends at least in part on the number of control vectors of symbols (124) allocated to one or more other control signals from M. The method also includes determining the number of control vectors of symbols (124) for mapping each control signal from M based on the corresponding value 'Q', calculated for said control signal, mapping said control signal and transmitting the control vectors of symbols.

EFFECT: providing optimum allocation of transmission resources when there is need to transmit a large amount of control information.

34 cl, 7 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to a method for wireless transmission of data using a plurality of transmission levels. The method includes steps of: estimating the number of vector symbols (124) to be allocated for transmission of user data codewords (122) during a subframe; and determining the number of bits in a plurality of user data codewords (122) to be transmitted during a subframe. The method also includes a step of calculating the number of control vector symbols (124) for allocation for control information based, at least in part, on the estimated number of vector symbols (124) and the determined number of bits. Further, the method includes steps of: displaying the control codewords (120) in the calculated number of control vector symbols (124) and transmitting the vector symbols (124), which transfer the user data codewords (122) and control codewords (120) on a plurality of transmission levels during a subframe.

EFFECT: optimum allocation of transmission resources between control information and user data.

26 cl, 7 dwg

FIELD: radio engineering, communication.

SUBSTANCE: method includes the following steps, performed at a base station (eNB): performing channel encoding of information bits (ST 802), performing a process of matching the rate of encoded bits after interleaving (ST 804), and transmitting the transmitted data corresponding to the length of the encoded bits after rate matching to a mobile terminal (UE) (ST 806); and the following steps, performed in a mobile terminal (UE): receiving transmitted data (ST 807), performing channel decoding of the received data (ST 810), and discarding part of the received data according to the soft buffer memory size of the mobile terminal (UE) and storage thereof in the soft buffer memory (ST 812 and ST 813).

EFFECT: reduced deterioration of transmission characteristics when transmitting data even when there is insufficient soft buffer memory in a mobile terminal to control retransmission.

17 cl, 14 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a channel state information (CSI) feedback method. A transmitter transmits a frame containing at least part of determined CSI. CSI is fed back in a very-high throughput (VHT) wireless communication system.

EFFECT: high data channel throughput, determining CSI parameters based on information included in a request.

73 cl, 34 dwg, 3 tbl

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to means of transmitting data packets. The method comprises encapsulating a data segment for a higher layer data packet in a lower layer data packet, wherein the higher layer data packet includes logical link control (LLC) protocol data units (PDU) and the lower layer data packet includes radio link control (RLC) data blocks for transmission over an enhanced general packet radio service (EGPRS) network; adding a new packet indicator set to a predetermined value to the lower layer data packet header if the data segment comprises the beginning of a new higher layer data packet to indicate the start of a new higher layer data packet; adding a length indicator to the lower layer data packet header if the data segment comprises the end of a higher layer data packet, wherein adding a new packet indicator includes adding a new packet indicator to a lower layer data packet only when the lower layer data packet begins from the new higher layer data packet segment.

EFFECT: reduced errors when segmenting and merging data packets.

12 cl, 8 dwg

FIELD: radio engineering, communication.

SUBSTANCE: device includes a unit transmission pulse counter, a transmission control unit, a transmission memory unit, a transmission parameter determining unit, a digital transmission system, a unit reception pulse counter, a reception control unit, a reception memory unit, a reception parameter determining unit, a comparator, transmission frame analysis units and a reception frame analysis unit.

EFFECT: high reliability of detecting single and multiple errors in a variable-length Ethernet frame and detecting alternating single and multiple failures in the digital data transmission system under analysis.

3 cl, 4 dwg

FIELD: radio engineering, communications.

SUBSTANCE: device comprises a correction device, a circuit of bit quality identification, a demodulator, a circuit of symbol quality detection and selection of least valid symbols, a circuit of code cycle synchronisation with integrated soft and hard decisions, a circuit of error vectors generation for least valid symbols, a unit of summators by module two, a unit of decoders of a BCH code, a circuit for detection of least weight, a controller of PC code decoder.

EFFECT: increased validity of information reception in channels with high level of noise.

1 dwg

FIELD: information technology.

SUBSTANCE: disclosed is a signal transmitting device comprising: a forward error correction (FEC) encoder which performs FEC coding of input data according to a Bose-Chaudhuri-Hocquenghem (BCH) coding scheme and a low-density parity check (LDPC) coding scheme; a first interleaver which interleaves FEC coded data; a symbol display unit which converts the interleaved data into data symbols; a second interleaver which interleaves data symbols; an encoder which codes data symbols interleaved by the second interleaver according to a multiple-input single-output (MISO) coding technique; a unit for inserting a pilot symbol into data frames which contains coded data symbols. At least the pilot symbol includes information for the type of transmission according to the MISO coding technique; and a transmitter for transmitting the data frame which includes the pilot symbol and data symbols.

EFFECT: high efficiency o using channel bandwidth, high rate of transmitting data and longer signal transmission distance.

15 cl, 35 dwg

FIELD: information technologies.

SUBSTANCE: invention is related to data transfer technology and may be used in systems with decision feedback for reception of information coded by cyclic code that permits majority decoding procedure. Decoder with detection and correction of errors comprises two OR elements, shift register, nine keys, syndrome calculator, summators, majority element, summator by module two, counter of corrections, shift counter, unit of discrete integration, counter of invalid symbols and buffer shift register. The novelty in decoder is introduction of discrete integration unit, counter of invalid symbols, the second OR element, two keys (eighth and ninth) and buffer shift register, and also change of connections between available elements of decoder. All that helped to increase noise immunity and accuracy of decoding of received discrete signals due to application of majority decoding principles.

EFFECT: improved noise immunity and accuracy of decoding.

1 dwg

FIELD: physics, communication.

SUBSTANCE: invention is related to the field of communication and may be used in devices for transmission of discrete information in communication line with interferences. Device contains memorising register, unit of error detection, unit of error correction, switching unit, which consists of two "AND" circuits, two registers of generator polynomial, two summators by module two, two decoders, programmable logical matrix, comparison unit, processor, inverter. Also method is disclosed for correction of two errors in cyclic code, which is realised by this device.

EFFECT: increase of communication channels equipment interference protection.

2 cl, 2 dwg, 1 tbl

FIELD: communications engineering, possible use in data transmission systems, for remote measurement, remote control, in radio-transmitting equipment of small spacecrafts and for deep space telemetry.

SUBSTANCE: in accordance to the invention, at transmitting side code words are generated by encoding information symbols using cyclic code without usage of synchronizing patterns, parameters of cyclic code are changed depending on level of interference, transferred information is accumulated at receiving side, thus creating a selection, then for phasing by code words limits of code word are determined, supposed length of code word is set, and in set window "sliding" symbol-wise discrete Fourier transformation is performed in Galois field for whole volume of selection being analyzed, while at each step of "sliding" discrete Fourier transformation in Galois field, selection of zero spectral components is performed as well as determining of quantity thereof together with building a function of number of zero spectral components at each step of "sliding" discrete Fourier transformation in Galois field, then decimation of given function is performed with step, equal to supposed length of code word, with building of a function estimate of mathematical expectation of number of zero spectral components, phasing moments reach maximum of mathematical expectation estimation function of number of zero spectral components, with consideration of resulting maximum, code words are selected, and then estimate of mathematical expectation of code word spectrums is performed and parameters of cyclic code are evaluated on basis of resulting code words, and then cyclotomic classes are determined, the generative polynomial of cyclic code is restored and code words are decoded.

EFFECT: increased interference resistance of cyclic code receipt, automatic adaptation of characteristics of transferred signal to interference intensity, increased speed of information transfer and accelerated phasing process during transfer of code words without synchronizing patterns.

4 dwg

FIELD: communications engineering, in particular, engineering of data transfer systems for decoding cyclic interference-resistant codes without preliminary phasing.

SUBSTANCE: during decoding of cyclic interference-resistant code, range of presumed lengths of code combinations [nmin-nmax] is determined, and assumed phase of beginning of code combination f is set, from phase f in received code series several presumed code combinations Si are selected and pairs are formed from selected combinations in accordance to condition Si≠Sk, N of greatest common divisors, represented by polynomials, is calculated, and from calculated polynomials a polynomial of least order is selected, which is considered equal to original polynomial g(x) of cyclic interference-resistant code, if N of greatest common divisors is equal to "1", then length of proposed code combination n is increased by one, phase of proposed beginning of code combination is altered for one, if greatest common divisor, different from "1", is not found for all n∈[nmin-nmax], combinations of errors are determined in code word and selected code combinations are decoded.

EFFECT: development of method for decoding cyclic interference-resistant code under conditions of adaptation of interference-resistant code to quality of information transfer channel.

3 cl

FIELD: communications engineering; data transfer, telemetering, and telecontrol systems.

SUBSTANCE: proposed codec has on sending end code-word data part shaper whose output and that of code-word synchronizing part shaper are connected to modulo two adder input; on receiving end it has binary filter whose code-word data part shaper output is connected to accumulator connected to synchronizing sequence decoder and to error connection unit whose outputs are connected to respective inverting inputs of code-word data part shaper; output of the latter functions as data output of device; output of binary-filter code-word synchronizing part is connected through switching unit to input of code-word data part shaping unit; synchronizing sequence decoder output is connected to control input of switching unit and to error correction unit input; on receiving end accumulator outputs are connected to inputs of code-word data part shift decoder whose output is connected to input of delay circuit whose output functions as second control input of switching unit and as synchronizing output of device.

EFFECT: enhanced noise immunity.

1 cl, 1 dwg

FIELD: communications engineering; network remote measuring and control systems.

SUBSTANCE: proposed noise-immune cyclic code codec designed for data transfer without pre-phasing has on sending end code-word information section shaper incorporating shift-register memory elements, units for computing verifying parts of noise-immune code of code-word information section, and modulo two adder of code-word information section shaper; code-word synchronizing section shaper and modulo two adder of code-word synchronizing section; on receiving end it has binary filter incorporating binary-filter shift register memory elements, computing units for verifying parts of binary-filter noise-immune code, and binary-filter modulo two adder; shift register of code word information section; decoder; accumulator; error correction unit; unit for shaping synchronizing section of code word; and modulo two adder units.

EFFECT: enhanced speed of device.

1 cl, 1 dwg

The invention relates to the field of communication technology and can be used in data transmission systems, systems, telemetering and telecontrol

The invention relates to a coder/decoder in a communication system, and more particularly to a device for encoding/decoding of linear block codes by analyzing serial concatenated codes

FIELD: communications engineering; network remote measuring and control systems.

SUBSTANCE: proposed noise-immune cyclic code codec designed for data transfer without pre-phasing has on sending end code-word information section shaper incorporating shift-register memory elements, units for computing verifying parts of noise-immune code of code-word information section, and modulo two adder of code-word information section shaper; code-word synchronizing section shaper and modulo two adder of code-word synchronizing section; on receiving end it has binary filter incorporating binary-filter shift register memory elements, computing units for verifying parts of binary-filter noise-immune code, and binary-filter modulo two adder; shift register of code word information section; decoder; accumulator; error correction unit; unit for shaping synchronizing section of code word; and modulo two adder units.

EFFECT: enhanced speed of device.

1 cl, 1 dwg

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