A OFDM Modulation Decoding Algorithm Based on LDPC
XU Zhi-jiang · Journal of Circuits and Systems · 2004
The performance of LDPC (Low Density Parity Check) coding is very close to the Shannon limit with low practical decoding complexity. When LDPC codes are applied to OFDM, the bit error rate (BER) of OFDM in multi-path environments can be improved effectively. An iterative decoding algorithm for the LDPC-OFDM systems with MQAM/MPSK is proposed in this paper. It is shown from simulation that the proposed algorithm for LDPC-OFDM systems with multilevel modulation works correctly both in AWGN and Rayleigh fading channels.