一种短波差分跳频信号检测方法

短波差分跳频通信跳速高、信息速率高、抗干扰性能好,具有良好的应用前景。低信噪比下跳频信号的检测是短波差分跳频的关键技术之一,为提高低信噪比下短波差分跳频信号的检测性能,提出了一种基于切片瞬时四阶矩相位信息的跳频信号检测方法。理论分析和仿真结果表明,该方法对噪声具有较好的鲁棒性,在低信噪比情况下,检测性能较传统的基于瞬时相关函数的方法有明显改善,而计算量相当,具有实际应用价值。

A detection method of DFH signals

Difference Frequency Hooping(DFH) short-wave communications have a good prospect because of its high hopping speed, high information speed and good anti-jamming performance. The detecting performance of SW DFH signals at low SNR is one of the key technologies. In order to improve the performance, a new method based on the phase information of the Sliced Instantaneous Higher-Order Moments(S-IHOM) has been proposed. The results show that the S-IHOM of FH signals is less sensitive to noise than the IFC of FH signals, and have much better performance at lower SNR while have similar amount of computation.