高频雷达去斜脉压加权处理分析

Analysis of Weighted Dechirp Pulse Compression of High Frequency Radar Echo

在高频雷达回波的去斜脉压中,去斜后各个单频脉冲在时间上不对齐,当用权函数压低旁瓣时,对各个单频脉冲有效的只是权函数的不同分段,且这些函数段通常是不对称的,导致了旁瓣电平抬高。该文在给定工作条件下,对加海明权函数时去斜脉压的最大旁瓣电平、以及加权引起的信噪比损失和主瓣展宽系数进行了定量计算和分析。

In the dechirp pulse compression of target echo of high frequency （HF） radar, the starting point of every dechirped echo is different. When a weight function is used to reduce the sidelobe, only some different segments of this function are useful to these dechirped echoes and these function segments are usually asymmetric, resulting in high sidelobe level. In this paper, the highest sidelobe level of the dechirp pulse compression, the SNR loss and the widening coefficient of the mainlobe caused by weight function are quantitatively computed and analyzed in the condition of using Hamming weight function.