摘要
为解决高动态、猝发式直扩通信系统中全数字接收机快速同步的问题,提出了一种新的基于FFT技术的直扩信号快捕方法。该方法在用匹配滤波器捕获伪码后,通过两级低阶FFT变换实现载波多普勒频偏的估计和补偿。实验结果表明,该方法可以很好地实现高动态猝发式扩频信号的捕获,并且可以有效地节省硬件资源。
In order to solve the problems of rapid synchronization in all-digital receiver of high dynamic,burst DSSS communication system, a FFT based novel acquisition algorithm was presented. The new algorithm used two stages of FFT transform to estimate and compensate the frequency offset after PN code was acquired by matching filter. Experiment indicated that the algorithm proposed worked well on high dynamic, burst DSSS signal acquisition, and on the other hand, saved hardware resource effectively.
出处
《科学技术与工程》
2008年第18期5174-5177,共4页
Science Technology and Engineering
关键词
高动态
伪码捕获
频偏估计
FFT
high dynamic PN code acquisition frequency offset estimate FFT
