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多径对雷达探测性能的影响分析
Analysis of radar detection under multipath effect
投稿时间:2012-09-04  修订日期:2012-11-08
中文关键词:多径  探测范围  探测概率  信噪比  多径传输因子
英文关键词:multipath  detection range  detection probability  Signal to Noise Ratio  multipath transmission factor
基金项目:
作者单位
周志增 63889 Unit of PLAMengzhou Henan 454750China 
刘 朋 63889 Unit of PLAMengzhou Henan 454750China 
顾荣军 63889 Unit of PLAMengzhou Henan 454750China 
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中文摘要:
      分析了自由空间和多径2种环境下雷达探测概率与信噪比的关系,雷达探测范围以及不同反射系数和不同载频下的多径传输因子。研究结果表明,反射系数越小,探测概率曲线越接近自由空间下的变化曲线。信噪比较大时,多径衰落造成其检测性能逐渐下降。当性噪比较低时,为得到相同的检测概率,多径所需要的信噪比比自由空间下约小7 dB~8 dB。多径传输因子随着距离起伏较大,反射因子越大,多径传输因子起伏越大,其相应的暴露区裂化程度越严重。
英文摘要:
      The relationships between radar detection probability and signal to noise ratio under two environments including free space and the multi-path are analyzed in detail. The radar detection range and the multi-path transmission factors under different reflection coefficients and different carrier frequencies are studied as well. The results show that the smaller the reflection coefficients, the closer the detection probability curves to the curves of the free space; the detection performance declines under high Signal to Noise Ratio(SNR) due to the multipath fading; in order to get the same detection probability, the SNR required in multi-path is lower by 7 dB-8 dB than that in the free space when the SNR is low; the bigger the reflection factors, the bigger the fluctuation of multi-path transmission factors, and the corresponding cracking of exposure zone is more serious.
引用本文:周志增,刘 朋,顾荣军.多径对雷达探测性能的影响分析[J].太赫兹科学与电子信息学报,2013,11(5):736~740
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