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A flexible field programmable gate array based radar signal processor is presented. The radar signal processor mainly consists of five functional modules: radar system timer, binary phase coded pulse compression(PC), moving target detection(MTD), constant false alarm rate(CFAR) and target dots processing. Preliminary target dots information is obtained in PC, MTD, and CFAR modules and Nios II CPU is used for target dots combination and false sidelobe target removing. System on programmable chip(SOPC) technique is adopted in the system in which SDRAM is used to cache data. Finally, a FPGA-based binary phase coded radar signal processor is realized and simulation result is given. 相似文献
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The m series with 511 bits is taken as an example being applied in non-coherent integration algorithm. A method to choose the bi-phase code is presented,which is 15 kinds of codes are picked out of 511 kinds of m series to do non-coherent integration. It is indicated that the power increasing times of larger target sidelobe is less than the power increasing times of smaller target mainlobe because of the larger target’s pseudo-randomness. Smaller target is integrated from larger target sidelobe,which strengthens the detection capability of radar for smaller targets. According to the sidelobes distributing characteristic,a method is presented in this paper to remove the estimated sidelobes mean value for signal detection after non-coherent integration. Simulation results present that the SNR of small target can be improved approximately 6 . 5 dB by the proposed method. 相似文献
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距离—速度二维波形分析跟踪 总被引:3,自引:2,他引:1
提出一种用于MTD体制雷达的速度-距离跟踪技术;距离-速度二维波形分析数字动目标跟踪技术。它是在距离波形分析数字动目标跟踪技术的基础上发展出来的。距离-速度二维波形分析数字动目标跟踪是通过高速采样存储N次雷达脉冲回波信号,在MTD处理(如FFT)后,分析回波波形信息获取目标的距离和速度误差而进行自动跟踪的。距离-速度二维波形分析数字动目标跟踪技术和距离波形分析数字动目标跟踪技术相比,利用的回波信息更全面,因而效果更好。 相似文献