Patent ID: 8504891

Claim:
A method for underwater acoustic (UWA) communication, the method comprising the steps of: (a) providing at least one nonbinary, low density parity check (LDPC) code to an encoder; (b) with the encoder, encoding: (i) at least one nonbinary regular LDPC code if the constellation size of the at least one nonbinary LDPC code is a modulation of at least 64-QAM or a Galois Field of at least 64, or (ii) at least one nonbinary irregular LDPC code if the constellation size of the at least one nonbinary LDPC code is a modulation of less than 64-QAM or a Galois Field of less than 64; (c) transmitting the at least one encoded LDPC code through an underwater transmitter on an orthogonal frequency division multiplexed (OFDM) UWA signal; (d) receiving the at least one encoded LDPC code through an underwater receiver on the OFDM UWA signal; (e) storing the received at least one encoded LDPC code; and (f) decoding the received at least one encoded LDPC code.