摘要
Pattern时延差编码水声通信体制利用信息码元的时延值调制信息,他的抗多途扩展干扰能力与码型种类及码型脉宽有关.扩频通信可获得扩频增益,可胜任远程水声通信,但其通信速率低是使用受限的重要原因.提出将扩频通信与Pattern时延差编码水声通信体制相结合,并采用M元扩频、多通道工作方式,构成一种新的适用于水声环境的通信方案,既可获得扩频通信的优良性能,又可提高通信速率.湖试结果验证了本文提出的M元混沌扩频多通道Pattern时延差编码水声通信方案的鲁棒性及可行性.
Pattern time delay shift coding scheme uses the time delay shift values of the Pattern to code the information whose anti-ISI (intersymbol interference) ability is related to the kind and duration of the Pattern. Spread spectrum communications is competent for long-range underwater acoustic communications for its spread spectrum gain, but the low communications rate seriously restricts its application. The proposed new scheme is adapted to the underwater acoustic environment, which integrates the spread spectrum with Pattern time delay shift coding and works at M-ary mode spread spectrum and several communications channels. The scheme could achieve good performance of the spread spectrum and also improve the data transfer rate. The results of lake trial show that the M-ary chaotic spread spectrum Pattern time delay shift coding scheme is robust and feasible.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第10期5915-5921,共7页
Acta Physica Sinica
基金
国家高技术研究发展计划(863)项目(批准号:2006AA09Z105)资助的课题~~
关键词
水声通信
M元混沌扩频通信
Pattern时延差编码体制
underwater acoustic communication, M-ary chaotic spread spectrum communication, Pattern time delay shift coding scheme