电光与控制
電光與控製
전광여공제
ELECTRONICS OPTICS & CONTROL
2013年
10期
102-105
,共4页
通信侦察%干扰识别%直接序列扩频%分层决策
通信偵察%榦擾識彆%直接序列擴頻%分層決策
통신정찰%간우식별%직접서렬확빈%분층결책
communication reconnaissance%jamming identification%direct sequence spread spectrum%hierarchical decision-making
宽带压制性干扰是直接序列扩频系统面临的主要干扰威胁之一，对宽带干扰样式的识别与参数估计可为直扩通信双方采取有针对性的抗干扰措施提供有益参考。针对直扩系统常见的宽带干扰类型，通过提取5个特征参数值，提出了一种基于分数阶Fourier变换和分层决策分类算法的宽带干扰样式自动识别方法，并给出了仿真结果及其分析。仿真结果表明，该方法可以有效识别无干扰、窄带干扰、宽带噪声干扰、宽带梳状谱干扰和宽带线扫频干扰情况，具有识别率高、算法简单、信号采样时长短、稳定性和鲁棒性好等优点。
寬帶壓製性榦擾是直接序列擴頻繫統麵臨的主要榦擾威脅之一，對寬帶榦擾樣式的識彆與參數估計可為直擴通信雙方採取有針對性的抗榦擾措施提供有益參攷。針對直擴繫統常見的寬帶榦擾類型，通過提取5箇特徵參數值，提齣瞭一種基于分數階Fourier變換和分層決策分類算法的寬帶榦擾樣式自動識彆方法，併給齣瞭倣真結果及其分析。倣真結果錶明，該方法可以有效識彆無榦擾、窄帶榦擾、寬帶譟聲榦擾、寬帶梳狀譜榦擾和寬帶線掃頻榦擾情況，具有識彆率高、算法簡單、信號採樣時長短、穩定性和魯棒性好等優點。
관대압제성간우시직접서렬확빈계통면림적주요간우위협지일，대관대간우양식적식별여삼수고계가위직확통신쌍방채취유침대성적항간우조시제공유익삼고。침대직확계통상견적관대간우류형，통과제취5개특정삼수치，제출료일충기우분수계Fourier변환화분층결책분류산법적관대간우양식자동식별방법，병급출료방진결과급기분석。방진결과표명，해방법가이유효식별무간우、착대간우、관대조성간우、관대소상보간우화관대선소빈간우정황，구유식별솔고、산법간단、신호채양시장단、은정성화로봉성호등우점。
Wide-band suppressing jamming is one of the main threats faced by Direct Sequence Spread Spectrum (DSSS) system.The identification of wide-band jamming modes and estimation of its parameters may provide a beneficial reference for implementing effective anti-jamming measures.Aiming at the common wide-band jamming modes faced by DSSS,five characteristic parameters are extracted .An automatic identification method of wide-band jamming modes was proposed based on Fractional Fourier Transform ( FRFT) and hierarchical decision-making algorithm .The simulation result and its analysis are given,which shows that:1 ) this method can effectively identify non-jamming,narrow-band jamming,wide-band noise jamming,wide-band comb jamming and wide-band sweep jamming; and 2 ) it has the advantages of high identification rate,simple algorithm,short sample time,fine stability and robustness,etc.
