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An improved normalized min-sum (IN-MS) algorithm is proposed for decoding low-density parity-check (LDPC) codes. In this algorithm, two normalized factors are used in check node computing, one for the minimum data and another for the second minimum data, and this algorithm achieves a better approximation to the BP algorithm. Simulation results show that the decoding performance of IN-MS algorithm...
In this paper, a modified a posteriori probability (APP) based algorithm for the decoding of low- density parity-check (LDPC) codes is proposed. The modified APP-based algorithm utilizes an additional processing in the bit nodes to improve the accuracy instead of the check nodes normalization performed in normalized APP-based algorithm. The modified APP- based algorithm yields desirable trade-off between...
in this paper, we theoretically derive the suitable normalized factor of normalized BP-based algorithm of LDPC decoding in 802.11n system. To be specific, we compute 1.15, 1.25, 1.3, 1.35 as the suitable normalized factors with regard to R=1/2, R=2/3, R=3/4, R=5/6 code in 802.11n system respectively. These factors can compensate for the performance loss in UMP BP-based algorithm. By analyzing the...
A new LDPC decoding design aimed for a reduced finite word-length hardware implementation is proposed for WiMAX LDPC codes. In this design, normalized BP-based decoding method and layered decoding scheme are employed. The correction factor of the decoding method is chosen to simplify the multiplication. By analyzing the statistical distribution of variable node message, the word-length of bit node...
In the fields of mobile phone and satellite communications, the quality of data transmission is required highly. In view of the hard space environment of high radiation for satellite, the hardening of anti-radiation must be considered during satellite communications for avoiding the phenomenon which influences communication or error, such as the SEU. Response to the request of the Consultative Committee...
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