通信技术
通信技術
통신기술
COMMUNICATIONS TECHNOLOGY
2013年
6期
28-33
,共6页
峰度%强信号%弱信号检测%性能分析
峰度%彊信號%弱信號檢測%性能分析
봉도%강신호%약신호검측%성능분석
kurtosis%strong signal%weak signals detection%performance analysis
强信号覆盖下，弱信号存在性问题一直是频谱监视、威胁评估、干扰检测领域的重要研究内容。为了有针对性地改进基于峰度特性的弱信号检测算法，提高弱信号检测性能。通过定量分析强信号信噪比、强弱信号功率比、定时偏差对检测算法性能的影响，优化影响算法性能的关键参数实现途径，给出一种既能有效抑制虚警又能提高弱信号检测概率的修正算法。计算机仿真结果验证了分析结论的正确性及修正算法的有效性。
彊信號覆蓋下，弱信號存在性問題一直是頻譜鑑視、威脅評估、榦擾檢測領域的重要研究內容。為瞭有針對性地改進基于峰度特性的弱信號檢測算法，提高弱信號檢測性能。通過定量分析彊信號信譟比、彊弱信號功率比、定時偏差對檢測算法性能的影響，優化影響算法性能的關鍵參數實現途徑，給齣一種既能有效抑製虛警又能提高弱信號檢測概率的脩正算法。計算機倣真結果驗證瞭分析結論的正確性及脩正算法的有效性。
강신호복개하，약신호존재성문제일직시빈보감시、위협평고、간우검측영역적중요연구내용。위료유침대성지개진기우봉도특성적약신호검측산법，제고약신호검측성능。통과정량분석강신호신조비、강약신호공솔비、정시편차대검측산법성능적영향，우화영향산법성능적관건삼수실현도경，급출일충기능유효억제허경우능제고약신호검측개솔적수정산법。계산궤방진결과험증료분석결론적정학성급수정산법적유효성。
Detection of weak signals covered by strong signal is an important problem in many fields including spectrum surveillance, threat assessment, jamming detection. In order to improve the detection algorithm and detection performance of weak signals covered by strong signal, the property of detection algorithm is studied, and the quantitative analysis also done on the unkown parameters, including signal noise ratio of strong signal, power ratio between strong and weak signals, timing error. Then by optimizing critical parameters of the algorithm, a modified algorithm is proposed, which could effecitvely suppress false alarming and raise the detection probility of week signals. Simulation indicates that the analyis is correct and the modified algorithm is feasible and effective.
