基于软件无线电的近距离扩频测距算法

Near Field Spread Spectrum Range Algorithm Based on Software Radio

对基于软件无线电的近距离扩频测距算法进行了研究.论述了直接序列扩频测距的原理,研究了近距离测距的回波模型.从理论上分析了由于体目标引起的引信回波信号的多普勒展宽和距离展宽问题,以及它们对近距离扩频测距的影响.提出采用正交接收机结构来消除载波随机相位对测距的影响.最后对算法进行了软件仿真,对文章的研究工作进行了总结.

The near field spread spectrum ranging algorithm based on software radio is investigated. The principle of direct sequence spread spectrum ranging is introduced and the echo model of near field ranging is discussed. A detailed analysis is made on the echo＇s Doppler spread and range spread caused by body target Spread, and on their influence on ranging. The structure of orthogonal receiver is adopted to eliminate the effect of carrier＇s random phase on range. Finally, the software simulation of algorithm is made and conclusions are drawn on the research work.