摘要
为了使数据在极其复杂的水声信道中可靠传输,需要采用具有很好纠错性能的纠错码来提高信息传输的可靠性。针对水声信道多径干扰强、信道衰落严重的特点,提出了基于Turbo编码的直接序列扩频水声通信编码方案,并对其在水声多径信道中的性能进行分析。数值仿真及湖试数据处理结果表明,该编码方案具有编码增益高、抗多径能力强的特点,误码性能优于不加直接序列扩频的Turbo编码方案,更适合于强多径、衰落严重的水声信道。
In order to ensure that the data is reliably transport in extremely complex underwater acoustic channel,error correcting code with excellent performance should be used to improve the reliability of information transmission.Strong multipath and serious fading is main characteristic for underwater acoustic channel,so we present the design of a reliable coding scheme based on Turbo codes and direct sequence spread spectrum（Turbo-DSSS）.The performance was analyzed and compared with another coding scheme based on Turbo codes,without using direct sequence spread spectrum（Turbo-DPSK）. The coding scheme was simulated and tested in the lake.In this paper,the data obtained from the test was processed,the result shows that Turbo-DSSS coding scheme can adds extra improvements in bit error rates（BER） and retains the advantage of multipath suppression,it has better performance than Turbo-DPSK coding scheme,so it is more suitable for the underwater acoustic channel which has the characteristic s of strong multipath and serious fading.
出处
《国外电子测量技术》
2010年第3期26-30,共5页
Foreign Electronic Measurement Technology
基金
国家自然科学基金(10674110)资助项目
关键词
TURBO码
水声通信
多径
直接序列扩频
Turbo codes
underwater acoustic communication
multi-path
DSSS（direct-sequence spread-spectrum）
