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Turbo, dual-mode decoder
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Application background Turbo code is an error correcting code, which is close to the Shannon limit. It is widely used in modern communication systems. The development of the future communication technology is urgent need to support the two mode or multi mode converter. Log-MAP algorithm as the decoding algorithm of LDPC code and Turbo code, and the Turbo code of the simplified algorithm is applied to the LDPC code. Key Technology Turbo codes are used as the component codes of Soft codes, and MAP Posterior Maximum Viterbi (A) and Output Viterbi Algorithm SOVA (Possibility) are used to improve the decoding performance of Turbo codes.
candyfly 0 0
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LDPC code encoder design
4.0
Application background The WIMAX standard is the fourth global 3G standard for ITU, WCDMA, CDMA200, and TD-SCDMA in 2007. The standard uses LDPC code as its optional channel encoding program. LDPC code with its excellent error correction performance has become a hot research topic in recent years. Key Technology The basic decoding algorithm of LDPC Codes: the probability BP algorithm, the log domain BP algorithm, the minimum and the algorithm, the minimum and the algorithm, the algorithm, the TDMP-NMS algorithm and the TDMP algorithm. Based on BP and its simplified algorithm, the algorithm has the advantages of fast convergence speed and NMS algorithm. The TDMP-NMS algorithm is implemented to support WIMAX standard code length and code rate LDPC decoder.
candyfly 3 0
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