话音混沌扩频通信实验平台的设计与实现

目前将混沌应用于扩频通信的研究主要以理论分析和计算机仿真为主 ,而硬件实现验证的工作较少。用数字信号处理器 (DSP)设计和实现了混沌扩频的话音通信实验平台。该实验平台由两个独立的模块———话音终端和扩频调制解调器构成。由于采用全数字化处理 ,选用DSP和专用芯片等器件构成硬件平台 ,因此该系统功能灵活 ,便于各种算法的研究。同时 ,该实验平台也可以作为实验用的数字编码话音信号源和扩频信号源

The Design and Implementation of Experimental Platform for Chaotic Spread-Spectrum Voice Communication

At present the study on the chaos based spread spectrum communication mainly focuses on the theoretical analysis and computer simulation, but its hardware realization and verification are rarely seen in the literatures. So an experimental platform for chaotic spread spectrum voice communication is designed and implemented by DSP (digital signal processor) in this paper. Two independent modules, i.e. voice terminal and spread spectrum mode are designed to make up this platform. Since all digital processing is adopted in the system and the hardware consists of DSP and ASIC (application specific integrated circuit) devices, this platform is versatile and convenient to study all kinds of algorithms. Besides, the platform can also be used as digital encoded voice sources and spread spectrum signal source for experiments.