Design of capacity-approaching irregular low-density parity-check codes
IEEE Transactions on Information Theory
Regular and irregular progressive edge-growth tanner graphs
IEEE Transactions on Information Theory
Iterative Carrier Frequency Offset and Channel Estimation for Underwater Acoustic OFDM Systems
IEEE Journal on Selected Areas in Communications
Nonbinary LDPC Coding for Multicarrier Underwater Acoustic Communication
IEEE Journal on Selected Areas in Communications
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A structure for decision feedback equalization (DFE) with low density parity code (LDPC) decoding is introduced for anti-multipath communication over underwater acoustic channels. The decoding performance of irregular LDPC codes is investigated. Simulations show that the DFE-LDPC structure has excellent anti-multipath performance. The BER (Bit Error Rate) of the system is less than 10−5, and the SNR (Signal to Noise rate) is higher than 11dB over three different underwater acoustic channels. Furthermore, the irregular LDPC codes optimized on AWGN channels are also excellent on strong multipath underwater acoustic channels. Under the same code rate and block length, irregular LDPC codes are better by about 0.5dB than regular LDPC codes with column weight 3 at BER=10−5.