中文摘要：

在最坏情况多音干扰环境中，一种应用于MFSK／FFH系统的差动干扰抑制（DJR）接收机被提出。该方法无需任何干扰信号副信息，利用接收端对跳频图案和跳频速率的先验知识，通过提前检测跳频频点频谱特征完成对干扰信号的差动抑制。数据分析和仿真表明了该方法有效性。

英文摘要：

A Differential Jamming Rejection （D JR） receiver in FFH/MFSK systems is introduced under a worst-case band multi-tone jamming. This method, based on ahead spectrum detection using apriority knowledge of FHP （Frequency Hopping Pattern） and FH rate, implements differential suppression of multi-tone jamming without any side information. Further analysis and data simulation indicate that this scheme possesses good efficiency.