一种短突发信号快速捕获的自适应门限判决方法

Adaptive Threshold Judgment Algorithm of Short Outburst Signals Fast Acquisition

根据实际的应用背景，针对突发短帧信号的特性，研究其信号快速捕获问题，提出了一种适应低信噪比、大动态接收范围情况下，捕获突发信号的自适应门限判决方法。并对视频输出中噪声部分的统计特性进行了分析，找出其统计量，同时提出了确定自适应门限的实施方法。经过试验表明该方法可以适用于动态信道环境下的突发信号的伪码的正确捕获。

According to the practical application background, aiming at the outburst short-frame signals, and by studying its fast acquisition problem, it provides an adaptive threshold judgment algorithm for outburst signal acquisition under the situation of low S/N ratio and great dynamic receiving range. Furthermore, it also analyzes the statistical characteristics of the video output noise part, then find out its statistical result, and present the implementation method of determining the adaptive threshold. Through some tests, it shows out that the method is suitable for correct pseudo-code acquisition of the outburst signals under the dynamic channel environment.