摘要
区别于传统的射频噪声和单频噪声,针对FSK信号具有频率键控的特点,提出了利用构造随机跳频噪声干扰FSK信号的方法。该噪声采用与被干扰信号相同码速率的随机码调频,具有与被干扰信号相似的谱形和随机跳变的瞬时频率,从而对正交解调和基于时频分析的FSK信号解调具有好的干扰效果。以2FSK信号模型为例,假设在接收机完成同步的条件下,导出了其影响接收机正交解调的误码率公式,并通过理论分析和仿真实验给出了干扰性能评价。仿真实验表明本文提出的调频噪声在不同干信比条件下比传统射频噪声有更好的干扰效果。
Different from the RF （ Radio Frequency） noise and the single-frequency noise, to aim at the characteristic that the FSK signal is frequency-shift keying, the random frequencyhopping noise is proposed to jam FSK signals. Adopting the same code rate as that of the jammed signal, the proposed noise has the similar spectrum to FSK signal and the random hopping frequencies, so that it has good jamming effect on the orthogonal demodulation and the FSK demodulation based on the time-frequency analysis. The error rate formula of its effect on the communication receiver＇ s orthogonal demodulation is deduced under the condition that the timing synchronization has been completed in the case of 2FSK model. And the jamming performance evaluation is also given by the theoretical analysis and simulation. And the jamming performance is given through the theoretical analysis and simulations. The simulation shows that the proposed frequency-modulated noise has better jamming effect in comparison with the traditional RF noise in the case of various JSRs （Jam-to-Siganl Ratio）.
出处
《电子信息对抗技术》
2007年第6期33-38,共6页
Electronic Information Warfare Technology
关键词
电子战
通信对抗
通信干扰
高斯噪声
通信系统
electronic warfare
communication countermeasures
communication jamming
Gaussian noise
communication system
