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| 1 | ANALYSIS OF CELL-AVERAGING BASED DETECTORS FOR χ^2 FLUCTUATING TARGETS IN MULTITARGET ENVIRONMENTS显示文摘The χ 2family of signal fluctuation distributions represents the main fluctuation models which most radar targets follow it in their reflections. This family can be categorized as fluctuation distribution with two degrees of freedom and those with four degrees of freedom. The first category represents an important class of fluctuation models which when illuminated by a coherent pulse train, return a train of fully correlated pulses (Swerling I model) or fully decorrelated pulses (Swerling II model). The detection of this type of fluctuating targets is therefore of great importance. This paper is devoted to the analysis of Cell-Averaging (CA) based de-tectors for the case where the radar receiver noncoherently integrates M square-law detected pulses and the sig-nal fluctuation obeys χ 2statistics with two degrees of freedom. These detectors include the Mean-Of (MO), the Greatest-Of (GO) and the Smallest-Of (SO) schemes. In these processors, the estimation of the noise power levels from the leading and the trailing reference windows is based on the CA technique. Exact formulas for the detection probabilities are derived, in the absence as well as in the presence of spurious targets. The pri-mary and the secondary interfering targets are assumed to be fluctuating in accordance with the χ 2fluctuation model with two degrees of freedom (SWI & SWII). The numerical results show that the MO version has the best homogeneous performance, the SO scheme has the best multiple-target performance, while the GO proce-dure does not offer any merits, neither in the absence nor in the presence of outlying targets. | Mohamed B. El_Mashade | 2006 | Journal of Electronics(China)2006，23，6： | 1 |
| 2 | 分布式OSCA-CFAR检测系统的检测性能显示文摘分布式检测系统可以提供更高的信噪比,提高系统在复杂电磁环境下的生存能力,抗干扰能力。由于OSCA-CFAR检测器具有较好的抗干扰性能,因此,在此研究了分布式OSCA-CFAR检测系统采用'AND','OR'融合准则时在非均匀背景下的检测性能。分析表明,分布式OSCA-CFAR检测系统采用'OR'融合准则时在非均匀背景下具有更好的抗干扰性能。 | 宋玉珍 刘炼 曲付勇 | 2010 | 现代电子技术2010，33，14： | 0 |
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