短波FH/OFDM通信系统抗跟踪式干扰性能分析  

Tracking Interference Suppression Performance Analysis of Shortwave FH / OFDM Communication System

作　　者：甘海慧 熊俊俏[2] 曹新莉[2] 陈爱杰[2] 

机构地区：[1]武汉烽火网络有限责任公司,武汉430074 [2]武汉工程大学电气信息学院,武汉430205

出　　处：《电讯技术》2015年第2期156-162,共7页Telecommunication Engineering

基　　金：湖北省自然科学基金资助项目(2014CKC524);武汉工程大学科研基金资助项目(K201421)~~

摘　　要：对于短波多载波跳频通信系统,跟踪式干扰是一种有效的干扰模式。分析了正交频分复用(OFDM)部分子信道干扰与符号误码率的关系,通过仿真获得了最佳跟踪干扰的部分时间参数,结合OFDM频谱结构与干扰频谱关系,推导了高斯信道条件下部分频带干扰和多音干扰时系统误码率,分析了短波FH/OFDM通信系统抗跟踪式干扰的误码率性能,仿真结果表明:跟踪干扰时间窗口对误码率的影响与部分频带干扰因子和信干比有关;在部分频带干扰与部分时间干扰之间,存在等效的干扰效果区域;多音干扰因子越大,系统所受影响越大,跟踪干扰时间窗口对误码率的影响与多音干扰因子和信干比有关,针对OFDM符号的多音干扰影响要远大于部分频带干扰的影响;跳频与OFDM技术的结合、提高载波跳速、减小跟踪式干扰对OFDM符号的影响,也是消除多音干扰的重要手段。Tracking interference is an effective interference patterns for a shortwave multi-carrier frequency-hopping（FH） communication system. In this paper,the relationship between sub-channels interferenceand orthogonal frequency division multiplexing（OFDM） symbol error rate is analyzed,and the part time pa-rameters of best tracking interference are obtained by simulation,the system bit error rate（BER） in partialband jamming and the multi-tone interference is derived under Gaussian channel according to the relation-ship between OFDM spectrum and interference spectral,and the BER performance of anti-tracking interfer-ence is analyzed. Simulations show that：the BER is related not only with the tracking interference time win-dow,but also with the partial-band interference factor and signal to interference ratio;there is interferenceequivalent region between the partial-band interference and the part-time interference;when the factor ofmulti-tone jamming is greater,the effect of the time-window on system is greater,the BER is related notonly with the tracking interference time window,but also with the multi-tone interference factor and signalto interference ratio,and the effect of multi-tone interference on OFDM symbol is more critical than that ofpartial band interference;by combining FH and OFDM,increasing the carrier FH rate and reducing the im-pact of tracking interference on OFDM symbols,multi-tone interference can be eliminated effectively.

关 键 词：短波跳频 多载波调制 跟踪式干扰 部分频带干扰 多音干扰 抗干扰性能分析 

分 类 号：TN911.2[电子电信—通信与信息系统]