关键词: GMSK调制, 跳频通信, 特征提取, 阻塞干扰, 干扰识别

Abstract:

Analyzing the interference environment in which the frequency-hopping（FH）communication system is located can help both the participants in communication take corresponding anti-interference measurements for specific types of interference.Follower jamming and barrage jamming are very useful jamming method to the FH communication system.The existing jamming-resisted algorithms may work well for certain interference.the proper anti-jamming measures can be implemented for different interferences.In this article,it focuses on the barrage jamming recognition of the Frequency Hopping-Gaussian filtered minimum shift keying（FH-GMSK）communication system.Based on the interference characteristics extracted from the receiving signals in the view of time,frequency and time-frequency domains,a set of characteristic parameters was picked up,which were robust and insensitive to the recognition signal to jamming ratio（SNRR）.And it can automatically identify the barrage jamming without the prior knowledge.And the simulation result proves that there is a much more accurate recognition rate for the FH communication system under the usual interferences with the different SNRR.

Key words: GMSK modulation, frequency-hopping communication, feature extraction, barrage jamming, interference recognition