一种基于谱修正数字脉压旁瓣抑制的改进方法  

An Improvement of Spectrum Modification in Digital Pulse Compression Sidelobe-suppression

作　　者：张云雷[1] 龚诚 卢建斌[1] 席泽敏[1] 

机构地区：[1]海军工程大学电子工程学院,武汉430033 [2]海军司令部,北京100032

出　　处：《舰船电子工程》2013年第2期61-63,共3页Ship Electronic Engineering

摘　　要：针对气象雷达应用脉冲压缩体制带来的超低距离旁瓣需求,文章将谱修正方法引入脉冲压缩旁瓣抑制中,在一定条件下,谱修正后脉压输出为窗函数的频谱,通过选取适当的窗函数可以获得超低峰值旁瓣(-60dB),但同时会带来较大的主瓣展宽和信噪比损失。为了解决上述矛盾,该文引入了带宽调整因子来平衡超低旁瓣和其他性能指标,讨论了调整因子的选择和算法的性能。仿真表明,改进后算法不但具有和原频谱修正算法相似的旁瓣性能,在不增加运算量的条件下,具有更小的主瓣展宽和信噪比损失。According to the requirement of superlow sidelobe in weather radar with pulse compression,this paper brings spectrum modification way,as the pulse compression＇s outcome is the spectrum of window function under some conditions,so any low sidelobe can be achieved by applying in the specific window functions in theory,but this will bring in much mainlobe widening and SNR loss.This paper effectively solves the problem by introducing an adjust factor with a variable of alterable frequency domain,and makes a discussion to the choice of the factor.The simulation results show that the improvement can get superlow sidelobe while result in very small mainlobe widening and SNR loss under the same computing complexity.

关 键 词：超低旁瓣 旁瓣抑制 脉冲压缩 谱修正 

分 类 号：TN911.72[电子电信—通信与信息系统]