具有强抗干扰性的快速跳频捕获方案设计

Fast acquisition scheme with excellent anti-jamming performance

滑动相关法和匹配滤波器法是现有的自同步跳频捕获方法中抗干扰性能最强的2种方法,但是,滑动相关法捕获速度太慢,匹配滤波器法系统结构太复杂。为了克服这些缺点,对这2种方法进行了深入的研究,从捕获时间的期望值、抗干扰性能以及系统结构的复杂度3方面对其性能进行了全面的对比评价,提出了一种改进的跳频同步捕获方案——“快速出局式捕获”。该改进方案在保持最高级别的抗干扰性能的同时,不仅具有与匹配滤波法接近的快速捕获速度,而且具有与滑动相关法相当的简单系统结构。

Modern frequency hopping systems generally use the sliding correlation scheme and the matched filter scheme which have the best anti-jamming performance. However, the sliding correlation scheme converges too slowly while the matched filter scheme occupies too much hardware. An improved acquisition scheme was developed which reduces the acquisition time, has excellent anti-jamming ability and limits the system complexity. The improved scheme not only keeps the best anti-jamming performance but also has a simple structure comparable to the classical sliding correlation acquisition with an acquisition speed almost as fast as the classical matched filter acquisition.