Abstract: The present application discloses a method for processing a signal. An apparatus detects, according to a check relationship set during a forward error correction coding, that a phase jump occurs in a data segment of a signal, and a quantity of degrees of the phase jump; performs, according to the quantity of degrees of the phase jump, a phase correction on the data segment; after the phase correction, performs a confidence correction on the data segment; and after the confidence correction, performs a forward error correction decision decoding on the data segment on which the confidence correction has been performed and output the data segment.

Abstract: Embodiments of the present application relate to a method for implementing Turbo equalization compensation. The equalizer divides a first data block into n data segments, where D bits in two adjacent data segments in the n data segments overlap, performs recursive processing on each data segment in the n data segments, before the recursive processing, merges the n data segments to obtain a second data block; and performs iterative decoding on the second data block, to output a third data block, where data lengths of the first data block, the second data block, and the third data block are all 1/T of a code length of a LDPC convolutional code.

Abstract: Embodiments of the present invention provide a decoding method and apparatus. The method includes: acquiring a demodulation signal; acquiring a first decoding signal, where the first decoding signal is a signal fed back after the ith M-ary differential decoding processing is performed on the demodulation signal, and i is an integer greater than or equal to 0; and performing M-ary differential decoding processing on the demodulation signal according to the first decoding signal, to obtain a second decoding signal. The first decoding signal that is fed back is added and input to a decoder.

Abstract: The embodiments of the present invention provide an encoding and decoding method and device. The encoding method includes: equally dividing input K-bit information into n blocks, where k1, k2, . . . , and kn are used to represent each block of information; combining a kith block of information with n?1 encoded code words Vi?1, Vi?2, . . . , and Vi?n+1 of ki?1th, ki?2th, . . . , and ki?n+1th blocks, to obtain a code word to be encoded, where when a sequence number of an encoded code word is smaller than or equal to 0, the encoded code word is history information; performing, by using an LDPC check matrix, encoding on the code word to be encoded, where a generated check bit and the kith block of information form an encoded code word Vi; and outputting encoded code words V1, V2, . . . , and Vn. The embodiments of the present invention are applied in encoding and decoding.

Abstract: Embodiments of the present invention provide a decoding method and a decoding device. The method includes: performing iterative decoding on a multidimensional code to obtain incorrigible code words; determining locations of error bits in the incorrigible code words that are obtained by performing the iterative decoding on the multidimensional code, where the locations of error bits in the incorrigible code words are multidimensional coordinate locations of the error bits in the multidimensional code; correcting error bits of a part of the incorrigible code words in the multidimensional code according to the determined locations of the error bits in the incorrigible code words; and after the error bits of a part of the incorrigible code words in the multidimensional code are corrected, performing iterative decoding on the multidimensional code The embodiments of the present invention are applicable to the field of decoding technologies.

Abstract: The present invention discloses a coding and decoding method, apparatus, and system for forward error correction, and pertains to the field of communications. The method includes: determining check matrix parameters of time-varying periodic LDPC convolutional code according to performance a transmission system, complexity of the transmission system, and a synchronization manner for code word alignment, constructing a QC-LDPC check matrix according to the determined check matrix parameters, and obtaining a check matrix (Hc) of the time-varying periodic LDPC convolutional code according to the QC-LDPC check matrix; de-blocking, according to requirements of the Hc, data to be coded, and coding data of each sub-block according to the Hc, so as to obtain multiple code words of the LDPC convolutional code; and adding the multiple code words of the LDPC convolutional code in a data frame and sending the data frame.

Abstract: The present invention discloses a receiving apparatus, a sending apparatus, a system and a method for optical polarization division multiplexing.

Abstract: Embodiments of the present invention provide a data transmitter, a data receiver, and a frame synchronization method. The data transmitter includes a coding module and a processing module. The coding module is configured to perform forward error correction FEC coding on sent data to obtain an FEC code word, and to output the FEC code word and an indication signal for indicating a boundary position of the FEC code word to the processing module. The processing module is configured to insert a training sequence into the FEC code word according to the indication signal, so that a data receiver determines the boundary position of the FEC code word according to the training sequence.

Abstract: The present invention provides a call access method, device and system. A base station receives a call access request sent by a terminal. The call access request includes a type of a call that the terminal requests accessing. The base station performs uplink synchronization with the terminal. The base station receives capability information of the terminal and sends a reception acknowledgement response to the capability information to the terminal. If the type of the call is an emergency call, the base station directly sends configuration information of a default bearer that corresponds to the capability information to the terminal.

Abstract: Embodiments of the present invention provide a decoding method and a decoding device. The method includes: performing iterative decoding on a multidimensional code to obtain incorrigible code words; determining locations of error bits in the incorrigible code words that are obtained by performing the iterative decoding on the multidimensional code, where the locations of error bits in the incorrigible code words are multidimensional coordinate locations of the error bits in the multidimensional code; correcting error bits of a part of the incorrigible code words in the multidimensional code according to the determined locations of the error bits in the incorrigible code words; and after the error bits of a part of the incorrigible code words in the multidimensional code are corrected, performing iterative decoding on the multidimensional code The embodiments of the present invention are applicable to the field of decoding technologies.

Abstract: The embodiments of the present invention disclose a system, a method, and a device for polarization multiplexing. The method includes: co-direction judgment: after judging that the similarity between the control quantities of the two optical signals meets a predetermined similarity criterion, enabling at least one of the two branches to re-search for the control quantity until the similarity between the control quantities of the two optical signals does not meet the predetermined similarity criterion. The preceding technical solution may substantially prevent the optical signals output by the two branches at a receiving end from having the co-directional state of polarization, without affecting the complexity and implementation cost of the system and the processing time delay of data signals at the receiving end.

Abstract: The present invention discloses a receiving apparatus, a sending apparatus, a system and a method for optical polarization division multiplexing.