Application of LDPC Code in TFU-OFDM Downlink

TFU-OFDM technology is time domain and frequency domain united orthogonal frequency division multiplexing(OFDM) technology.It could get better anti-interference and bit error rate performances through the channel estimation which used both PN sequence and pilots.LDPC code is the best channel code to the Shannon limit.Various decoding methods are analyzed for the quasi-cyclic LDPC code.The research on the bit error rate performances in Normalized Min-Sum decoding Algorithm acquired the best values of both the correct factor and number of iterations.A performance assessment for the downlink TFU-OFDM system combined with LDPC code is performed.