Zte Corporation

Sanechips Technology Co., Ltd.

Yueyi You

Tao Zhang

Nanshan Cao

Qiang Li

Ning Qiu

Yangzhong Yao

Haiyong Xiao

The present invention discloses a channel estimation method and device in an orthogonal frequency division multiplexing system. The method includes steps of: A. grouping physical resource blocks in the bandwidth of the orthogonal frequency division multiplexing system; B. extracting at least one group from groups for channel estimation to acquire a channel coefficient, wherein the number of the extracted groups is less than the total number of groups; C. completing the MIMO demodulation by using the acquired channel coefficient; D. judging whether the channel estimation on the grouping has been completed, if yes, ending, otherwise, returning to step B. The device divides the physical resource blocks (PRB) in the bandwidth of the orthogonal frequency division multiplexing system into several groups and then carries out channel estimation processing on each group of resource blocks successively and individually, so as to achieve memory sharing and save storage amount.

Method and device for channel estimation in orthogonal frequency division multiplexing system

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.

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Shenzhen, China

Yueyi You