| 一种浅海信道扩频水声调制解调系统及其DSP实现 |
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| 引用本文： | 王潜,颜国雄,童峰.一种浅海信道扩频水声调制解调系统及其DSP实现[J].厦门大学学报(自然科学版),2009,48(4). |
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| 作者姓名： | 王潜 颜国雄 童峰 |
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| 作者单位： | 厦门大学水声通信与海洋信息技术教育部重点实验室,福建,厦门,361005 |
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| 基金项目： | 国家自然科学基金，福建省新世纪优秀人才支持计划项目 |
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| 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.
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| 关 键 词： | 直接序列扩频 |
An Underwater Acoustic Modulation and Demodulation System Based on the DSP Technology |
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| WANG Qian,YAN Guo-xiong,TONG Feng.An Underwater Acoustic Modulation and Demodulation System Based on the DSP Technology[J].Journal of Xiamen University(Natural Science),2009,48(4). |
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| Authors: | WANG Qian YAN Guo-xiong TONG Feng |
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| Abstract: | DSSS is a kind of anti-multi-path and anti-jamming technology used for data transmission. In view of the strong multi-path 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 multithread 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. |
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| Keywords: | DSP DS-DBPSK DSP/BIOS DSP DSSS DS-DBPSK DSP/BIOS |
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