摘要
针对大频偏下高动态直扩接收机伪码捕获时间长的问题,提出了一种新的捕获方案,即基于FFT算法实现对多普勒频移进行一定程度的补偿,解决了高动态环境下伪码序列的快速捕获问题。实验结果表明,该方法可以很好地实现高动态扩频信号的捕获,并可以有效地节省硬件资源。
A new codeacquisition method based on FFT algorithm is presented to solve the problem of long code acquisition time in high dynamic DS - SS receiver having large frequency offset. The new algorithm can compensate the frequency offset in a certain extent. Experiment results have verified its excellent performance and hardware efficiency.
出处
《现代电子技术》
2007年第23期42-44,共3页
Modern Electronics Technique
关键词
FFT算法
多普勒频移
匹配滤波器
扩频通信
码捕获
FFT algorithm
frequency offset
segmented matched filter
spread spectrum communication
code acquisition
