基于复合扩频序列的声光快捕方法

针对扩频伪码捕获时间长、占用资源大的缺点,提出基于复合扩频序列的声光快捕方法。该方法利用复合扩频序列的相关特性及声光技术处理具有高增益的特点,实现在射频上直接对低信噪比信号进行检测,实现简单并可节约大量资源。理论分析与仿真表明,采用声光技术的扩频系统能实现对低信噪比伪码的快速捕获。

The AO Fast Acquisition Based on Complex SS Sequence

In order to shorten the time of capturing spread spectrum(SS) sequence and save the resource of the system engrossing,a acousto-optic(AO) fast acquisition method based on complex SS sequence is described in the paper.By use of the correlation characteristic of the complex SS sequence as well as AO technology with high gain,the method detects the low SNR signal directly on the RF band,and the system structure is simple.The theory analyses and simulations show that the SS system based on AO technology can realize a fast acquisition of pseudo code under low SNR Condition.