摘要
直接序列扩频技术是一种能有效抗多径和抗干扰的信息传输技术,针对浅海信道强多径干扰和低信噪比的特性,研究了一种二进制差分相位键控-直接序列扩频(DS-DBPSK)水声调制解调技术方案,并设计了以高速DSP芯片TMS320C6713为核心的调制解调实现系统.为了合理利用DSP的CPU资源及保证调制解调方案的实时实现,系统采用DSP/BIOS实时操作系统提供的中断管理和多线程机制,在提高程序执行效率的同时降低了对存储器和CPU的负荷和需求.初步的湖试和海试结果表明了该系统的有效性.
DSSS is a kind of anti-multi-path and anti-jamming technology used for data transmission. In view of the strong multipath and low-SNR characteristics in shallow water channel, this paper studied a DSSS underwater acoustic communication scheme and designed a modulation and demodulation implementation system based on high-speed DSP TMS320C6713. This system adopted the interrupt management and muhithread mechanism provided by DSP/BIOS to make rational use of DSP CPU resources and ensure the real-time operation. The experimental results obtained at lake and on sea confirmed the effectiveness of the proposed system.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第4期532-537,共6页
Journal of Xiamen University：Natural Science
基金
国家自然科学基金(10704063)
福建省新世纪优秀人才支持计划项目资助
