Title :
Performance analysis of underwater digital speech communication system based on LDPC codes
Author :
Han, Wei ; Huang, Jianguo ; Jiang, Min
Author_Institution :
Coll. of Marine Eng., Northwestern Polytech. Univ., Xian
Abstract :
To reduce error codes between the receiver and the transmitter and to achieve credible transmission performance of underwater digital speech communication system, low density parity check code (LDPC) is introduced to underwater digital speech communication system. Based on the characteristics of the system, (864,432) LDPC code with code rate 1/2, row weight 6, column weight 3 is selected. We also compare the LDPC code with Turbo code with 1/2 code rate. The experiment results show that digital speech signal transmission is reliable if signal to noise is more than 1.5 dB in the underwater digital speech communication system.
Keywords :
error correction codes; parity check codes; speech coding; underwater acoustic communication; voice communication; LDPC code; error code; low density parity check code; underwater digital speech communication system; Belief propagation; Block codes; Code standards; Oral communication; Parity check codes; Performance analysis; Sparse matrices; Speech coding; Turbo codes; Underwater communication; belief propagation (BP); log likelihood ratios (LLR); low density parity check code; underwater channel;
Conference_Titel :
Industrial Electronics and Applications, 2009. ICIEA 2009. 4th IEEE Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4244-2799-4
Electronic_ISBN :
978-1-4244-2800-7
DOI :
10.1109/ICIEA.2009.5138212
