水声直接序列扩频通信捕获电路的优化设计  

Optimizing design of acquisition circuit for direct sequence spread spectrum in underwater acoustic communication system

作　　者：张晓彤[1] 刘金龙[1] 刘兰军[1] 王有华[1] 王沁[1] 

机构地区：[1]北京科技大学信息工程学院,北京100083

出　　处：《仪器仪表学报》2009年第6期1256-1260,共5页Chinese Journal of Scientific Instrument

基　　金：国家863计划(2006AA09Z115)资助项目

摘　　要：通过对水下声通信直接序列扩频通信信号捕获算法的研究,利用本地标准样本具有周期性特点对匹配滤波捕获算法进行改进,提出一种面积优化、低功耗的匹配滤波信号捕获电路设计方法。该方法基于流水线技术,采用先加后乘的电路结构,较传统结构减少了运算电路的乘法器数量。经过EDA工具综合仿真和实际系统验证,该方法较传统匹配滤波捕获电路节省了42.45%的逻辑资源,电路动态功耗降低了43.17%。该设计方案已成功用于一种基于FPGA实现的支持码分多址接入的水声直接序列扩频通信系统中。Based on the analysis of the acquisition algorithm for a direct sequence spread spectrum in underwater acoustic communication system, the matched filter algorithm with the cyclical features of local standard samples is improved, an area optimization and the low-power circuit realization method are proposed. Using the multiplication after add pipeline structure this method reduces the amount of multiplications than that of traditional method. According to EDA tools integrated simulation and the actual system verification, the circuit saves 42.45% of the logic resources and 43.17% lower power than the conventional circuit. And the acoustic signal acquisition circuit has been successfully used for CDMA based on acoustic direct sequence spread spectrum communication system.

关 键 词：水声通信 直接序列扩频 匹配滤波 流水线 动态功耗 

分 类 号：TN914.42[电子电信—通信与信息系统]