Simulation of Soft-inout Soft-output Multicarrier Detector and Decoder for LDPC Codes OFDM System in Mobile Channels

• Main Authors: Yi-Rung Peng, 彭以榮
• Other Authors: 曾恕銘
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/en4pgc

碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 94 === Recently, low-density parity-check (LDPC) codes have attracted a lot of attention. In this thesis, we apply turbo inter-carrier interference (ICI) cancellation (channel detecting) and sum-product decoding to the LDPC-OFDM system in the mobile channel. The simulation results show that the proposed Turbo ICI cancellation and sum-product algorithm decoding of LDPC coded OFDM systems can achieve the comparable error rate performance with Turbo ICI cancellation and BCJR decoding of convolutional coded-OFDM systems when codeword length is not too short. LDPC_OFDM also have lower computational complexity. We also consider the perfected known and unperfected known channel conditions.