Pattern Time Delay Shift Coding Scheme for Underwater Acoustic Communication Based on Chaotic Spread Spectrum
The time delay shift values of the pattern were used to encode the digital information in the Pattern Time Delay Shift Coding (PDS) communication system, it’s a robust and effective scheme for the underwater acoustic communication. Chaos is a deterministic, random-like process found in nonlinear, dynamical system, which is non-period, non-converging and bounded. It is very easy to generate chaotic spreading sequences which have ideal correlation and balance. Used in communication system, chaotic spreading sequences can obtain spread spectrum gain and is also suitable for remote communication particularly. Combining chaotic spread spectrum with PDS scheme, the underwater acoustic communication system can achieve the excellent performance of chaotic spread-spectrum communication system and improve its ability of anti-multipath interference. The communication system uses chaotic spreading sequences to produce the pattern codes in the PDS scheme, and then the digital information is encoded using the pattern codes. The different chaotic spreading sequences will also be sent as correcting codes with information codes when communication in the water. At the receiver, the corresponding correcting codes and the received information codes will be sent to copy correlator to estimate the time delay shifts, which are used to decode the digital information. The trial results on Lianhua Lake show that PDS scheme based on the chaotic spread spectrum has a good ability of anti-multipath interference and anti-doppler shift, and also prove that it is suitable for remote underwater acoustic communication.
underwater acoustic (UWA) communication pattern time delay shift coding (PDS) chaotic spread spectrum
Chen Kai Zhao Anbang Meng Hua Yu Yun Yu Yi
National Laboratory of Underwater Acoustic TechnologyHarbin Engineering University, China Unit 91388 National Laboratory of Underwater Acoustic TechnologyHarbin Engineering University, China Unit 91388, PLA, Chinachenkaiheu@sina.com Unit 91388, PLA, China chenkaiheu@sina.com
国际会议
哈尔滨
英文
151-155
2011-01-18（万方平台首次上网日期，不代表论文的发表时间）