摘要
采用Pattern时延差编码(PDS)通信体制,研究了4通信信道水声通信技术。通信系统利用信息码元的时延差值进行时延编码,采用码元的多种不同波形(Pattern)来进行码元分割,另外还采用频率分割来划分通信信道。其优点是可有效对抗水声多途干扰并实现高速通信,通信速率达到1200bit/s。提出依据最小均方误差准则,利用波形相似性来联合估计两个信道的时延差值。通过大量海洋信道仿真实验,验证了PDS体制具有高通信速率和高可靠性。
A 4-channel underwater acoustic communication system is studied based on pattern time delay shift （PDS） coding. By using different patterns for code division and different frequency tor channel division, the system is highly robust against multi-path interference. The transmission rate is 1200bit/s. Combined estimation of time-delay between two channels is obtained with a minimum mean square error criterion by using similarity of the signals. Simulation results show that the PDS system can achieve high data rate and good reliability.
出处
《声学技术》
EI
CSCD
北大核心
2006年第1期10-15,共6页
Technical Acoustics
关键词
水声通信
PDS通信体制
时延估计
underwater acoustic communication
PDS system
time-delay estimation
