Zte Corporation

Sanechips Technology Co., Ltd.

Nanshan Cao

Li Chen

Ning Qiu

Qiang Li

Tao Zhang

Yangzhong Yao

Yueyi You

Xi Wang

Yunpeng Li

Guohua Gu

Shuangxi Li

Chungui Tao

Yuanliang Huang

The present disclosure provides a signal sampling method and apparatus, and an optical receiver. The method includes sampling a burst signal that is received according to a first sampling frequency to obtain a first sampling signal; sampling a preamble signal in the first sampling signal according to a second sampling frequency to obtain a second sampling signal; determining a phase difference between the burst signal and a local sampling clock corresponding to the first sampling frequency according to the second sampling signal; and interpolating the first sampling signal according to the phase difference to obtain a target sampling signal.

Signal sampling method and apparatus, and optical receiver

The present disclosure provides a method for estimating a frequency offset, including: extracting sampling points from an input signal according to preset intervals to obtain a plurality of groups of sampling points, with the preset intervals of the groups of sampling points being different; performing processes on a current sampling point and the groups of sampling points to obtain data of arguments of complex numbers corresponding to the preset intervals; and determining an estimation value of a frequency offset of a current input signal according to the data of arguments of complex numbers corresponding to the preset intervals. The present disclosure further provides an apparatus for estimating a frequency offset, an electronic device and a computer-readable medium.

Method and apparatus for estimating frequency offset, electronic device and computer-readable medium

An MAP algorithm-based Turbo decoding method and apparatus. The method includes: iteratively estimating an information symbol by using an MAP algorithm, acquiring an &#x3b1; and &#x3b2; window boundary values of each sliding window by means of window boundary value inheritance, acquiring an &#x3b1; block boundary value and &#x3b2; block boundary value of each sub-block by means of block boundary value inheritance, and recursively calculating posterior probability Log Likelihood Ratio (LLR) values of a whole window and a whole block according to the &#x3b1; boundary values and the &#x3b2; boundary values (); and performing decoding decision according to the LLR values ().

Map algorithm-based turbo decoding method and apparatus, and computer storage medium

A synchronization method is disclosed, including: obtaining a synchronization symbol position {circumflex over (d)}of one time slot of an initial update period; taking Nframes as an update period to adjust the synchronization symbol position, and the step of adjusting the synchronization symbol position including: obtaining a synchronization symbol position {circumflex over ({circumflex over (d)}=d+N{circumflex over (T)}of a corresponding time slot of a (k+1)update period according to a synchronization symbol position {circumflex over (d)}of a corresponding time slot of a kupdate period and an inter-frame sampling derivation estimation value {circumflex over (T)}of said kupdate period; obtaining synchronization symbol positions of other time slots in said kupdate period according to the synchronization symbol position {circumflex over (d)}of the corresponding time slot of the kupdate period and the inter-frame sampling derivation estimation value {circumflex over (T)}of said kupdate period. A synchronization apparatus is also disclosed. The method and apparatus reduces synchronization calculation amount.

Synchronization method and device

The embodiments of the invention disclose a method and a device for decoding an RS code, the method comprising: receiving bit reliability information of the RS code output by a channel, performing a hard decision on the bit reliability information to obtain a hard-decision result value sequence; determining a type of an error of the hard-decision result value sequence according to an initial check array corresponding to an encoding mode of the RS code; according to preset corresponding relationships between types of errors of the hard-decision result value sequence and error-correcting modes capable of correcting the errors, determining an error-correcting mode corresponding to the type of the error of the hard-decision result value sequence, and performing a bit error correction on the hard-decision result value sequence according to the determined error-correcting mode; outputting the hard-decision result value sequence after the bit error correction as a decoding result.

Method and device for decoding Reed-Solomon (RS) code

Disclosed are a decoding method and device for concatenated code, for the decoding of concatenated code composed of low density parity code (LDPC) and Reed-Solomon (RS) code. The method includes carrying out LDPC soft decision iterative decoding on bit de-interleaved data flow, and carrying out check decision on LDPC codeword obtained from decoding by using a check matrix; carrying out de-byte-interleave on an information bit of the LDPC codeword obtained from decoding and converting check information of the LDPC codeword into puncturing information of RS codeword; selecting a decoding mode according to the puncturing information of the RS codeword to carry out RS decoding. By way of the solution of the present invention, the RS decoding performance can be improved without increasing the computation complexity, thus greatly improving the receiving performance of the CMMB terminal as compared to the conventional method.

Decoding method and device for concatenated code

The present invention discloses an OFDM signal demodulation method and device thereof. The method comprises: adding a pre-obtained timing offset estimation value of an OFDM signal demodulation device to the initial position of an OFDM symbol of a received signal to obtain a window deviation value of the OFDM symbol; adding a channel time delay extension to the window deviation value to obtain a combined prefix initial position; calculating the combined OFDM signal value starting from the prefix initial position; processing the Fast Fourier Transform (FFT) for the combined OFDM signal value to obtain a frequency domain data subcarrier signal; calculating the frequency domain original channel estimation value processing the channel estimation based on the original channel estimation value phase modification of the OFDM symbol according to the channel estimation compensation indication value; and processing equalization and detection for the frequency domain data subcarrier signal according to the channel estimation result. The present invention uses the cycle prefix of the received signals to promote the demodulation performance of the OFDM signal demodulation device.

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Shenzhen, China

Nanshan Cao