多径反射下低空目标检测研究
Radar detection of low altitude target in multipath
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摘要: 该文主要考虑多径反射对目标检测的影响及采用频率分集技术的多脉冲M/N检测的参数选择(M是超过检测阀值的脉冲个数,N是总脉冲个数)。为了选取适当的M和N以保证检测概率,必须获得噪声加目标乘以多径因子后的统计分布。与其他研究不同的是,该文采用了更一般的反射模型,实际推导出无起伏和瑞利起伏目标的多径回波功率的PDF,并应用该PDF简要计算出在多径环境下多脉冲检测的最佳M/N选择与pF和pD的关系(与自由空间相比)。
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关键词:
- 低空目标检测; 多径反射; 频率分集
Abstract: This paper deals with the influence induced by multipath propagation and optimal selection of M/N when frequency diversity technique is used. To ensure the detection statistic and choose the correct M and N, it must be known that the probability density function (PDF) of the noise plus target times the multipath factor. Differ from other papers, the more general model of reflection is adopt, the PDF is derived for a nonfluctuating target and for a Rayleigh target, then the relation between M/N and P_D/P_F is got by multi-pulse detection in multipath. (compared with free-space). -
M.I.斯科尔尼克(美)编著,林茂庸等译,雷达系统导论,北京,国防工业出版社,1992,140-148.[2]M.W.朗(美)著,薛德镛译,陆地和海面的雷达波散射特性,北京,科学出版社,1981,第4章. ［3］S.L. Wilson, B. D. Carison, Radar detection in multipath, IEE Proc.-F, 1999, 146(1), 45-52.[3]E. Daeipour, W. D. Blair, Y. Bar-Shalom, Bias compensation and tracking with monopulse radars in the presence of multipath, IEEE Trans. on AES, 1997, AES-33(3), 863-882.[4]何友,等著,雷达自动检测与恒虚警处理,北京,清华大学出版社,1999,17-31. -
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