Code-aided Iteration Carrier Synchronization Algorithm
YANG Guanghui
ZHANG Shuxia
JIANG Yuzhong
Abstract：At low signal-to-noise ratio, the carrier frequency offset and phase offset will have a significant impact on the LDPC code system, requiring the receiver to estimate the frequency offset and phase offset before decoding.In order to solve the above problems, a code-aided iterative carrier estimation is proposed based on statistics of soft information from LDPC iterative decoder.The basic idea is to use the soft information output by the decoder to assist the estimation of the synchronization parameters, which is to use the soft information for the coarse synchronization of the carrier based on the cost function and the carrier synchronization based on the maximum likelihood iteration respectively.The better carrier synchronization is achieved by conducting the joint iteration of synchronizer, demodulator and decoder.
Keywords：LDPC Codescode-aidedsoft decoding informationiterative carrier synchronization
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 28-31 )