非线性调频信号时域旁瓣抑制滤波器设计  

NLFM Digital Pulse Compression Filter Design in Time Domain for Sidelobe Suppression

作　　者：杨斌[1] 武剑辉[2] 向敬成[2] 

机构地区：[1]西南电子技术研究所 [2]电子科技大学电子工程学院

出　　处：《信号处理》1999年第B12期31-35,共5页Journal of Signal Processing

摘　　要：本文研究较小时带积的非线性调频信号以 Ｎｙｑｕｉｓｔ速率采样在时域进行压缩处理的数字 ＦＩＲ滤波器设计问题。重新定义目标函数和约束条件，利用迭代加权最小二乘技术，得出了又一种设计算法。模拟和实验表明，设计处理结果在多普勒频移 ｆ_ｄ＝０时，控制 ４ｄＢ主瓣展宽并使失配信噪比损失有限条件下，峰值旁瓣电平抑制较匹配处理提高了６～１０ｄＢ。A novel approach to design digital pulse compression filter in time domain is proposed, which is applied to NLFM signals with small time bandwidth product. The processing is based on iteratively reweighted least square method, but the object function and constraint condition are redefined, and the solution is obtained. When the Doppler frequency shift f_d=0, the 4dB mainlobe width is controlled and the loss of signal-to-noise ratio is limited, the peak sidelobe level is improved about 6~10dB.

关 键 词：脉冲压缩 旁瓣抑制 非线性调频 滤波器 雷达 

分 类 号：TN957.51[电子电信—信号与信息处理] TN713.02[电子电信—信息与通信工程]