摘要
介绍了利用改进型的时间相关算法进行短波非正交跳频网台信号分选的方法。由于短波信号环境的复杂性,影响了对短波领域跳频信号的检测,使得跳频信号的持续时间这一关键技术参数无法正确获取,因此采取提高跳频信号检测的准确性和找回因"频率碰撞"而丢失的跳频频点等方法对时间相关分选算法进行改进,以提高网台信号分选的正确概率。通过实验分析,结果表明,在适当的信噪比条件下,改进型时间相关分选算法能够完成四部非正交跳频网台信号的分选,分选的正确率大大提高。
Shortwave non-orthodox frequency-hopped signal selection by improved time correlation arithmetic is introduced. Because of the complexity of shortwave signal environment, the detection of frequency-hopped signal in shortwave is affected and the durative time of frequency-hopped signal is not gained correctly, so time correlation arithmetic is improved by some methods such as the increase of detective veracity about frequency-hopped signal and the settlement of 'frequency-collision'problem etc, which make the correct probability of signal selection improved. The selection of four non-orthodox frequency-hopped network station signal is completed by improved time correlation arithmetic in proper SNR.
