线性调频信号数字脉冲压缩的优化设计  

Optimized Design for Digital Pulse Compression of LFM Signal

作　　者：唐爱鹏[1] 刘丽霞[1] 倪亮[1] 

机构地区：[1]北京控制与电子技术研究所,北京100038

出　　处：《计算机仿真》2014年第8期1-5,共5页Computer Simulation

摘　　要：在雷达探测系统优化问题的研究中,线性调频(LFM)信号广泛应用于雷达探测系统,数字脉冲压缩是数字雷达接收机中的关键技术,脉压精度直接影响整个系统的性能。为了提高脉冲压缩的精度,提出了数字脉冲压缩的优化设计方案,首先研究了频域匹配滤波器对脉压输出序列中目标位置和弃置区的影响,然后实现了基于FPGA的高性能单精度浮点脉压处理器。仿真结果表明,频域匹配滤波器的设计至关重要,浮点脉压处理器实时性好,通用性强,信号精度高。改进方案可以灵活设置参数,具有很好的工程适应性。Linear Frequency Modulation （LFM） signal is widely used in radar systems. Digital pulse compression is the key technology of digital radar receiver, and the accuracy directly affects the performance of the whole system. In order to improve the precision of pulse compression, the paper puts forward an optimization design. First, research the location of target and disposal area among the output of pulse compression with different matched filter. Then pro- pose a high performance pulse compression processor based on FPGA. Simulation result shows that the effect of fre- quency domain matched filter is very important. The pulse compression processor has good real - time performance, strong commonality and high precision. For the flexibility of parameter setting, the design is suitable for engineering application.

关 键 词：数字脉冲压缩 匹配滤波器 现场可编程门阵列 单精度浮点 

分 类 号：TN957[电子电信—信号与信息处理]