对电离层慢相径调制干扰去除算法的优化  

Optimization Algorithm to Decontaminate HF Sky-Wave Returns for Ionospheric Slow Phase-Path Disturbance

作　　者：侯成宇[1] 沈一鹰[1] 刘永坦[1] 

机构地区：[1]哈尔滨工业大学电子信息研究室,黑龙江哈尔滨150001

出　　处：《电子学报》2007年第3期539-542,共4页Acta Electronica Sinica

摘　　要：本文就已提出的一种电离层慢相径调制干扰抑制改进算法进行优化.在理论分析慢相径调制干扰的基础上,对算法进行了两方面优化:两个一阶Bragg峰得到的电离层扰动信息的动态加权;采用迭代处理方式.仿真处理验证了理论分析结果,又表明:该算法可以仅通过单批积累周期数据来实现多普勒谱质量改善,这对于提高机动目标发现概率是大有裨益的.This paper presents an algorithm to optimiza the estimation of the ionospheric slow phase-path disturbance in High-frequency sky-wave over-the-horizon radar. Based on the theoretical analysis of the radar echoes＇ distortion by the slow phasepath-modulation disturbance, two optimization aspects are considered. One is using the prior knowledge of the amplitude difference between the two first-order Bragg peaks to acquire optimum weighting. The other is to apply the iterative process to further enhance the special decontamination. Example of simulation demonstrates that this method can achieve the better desmearing Doppler spectra with single coherent integrated time data, which is helpful to detect the ship targets with higher detection probability.

关 键 词：天波雷达 电离层干扰 慢相径调制估计 

分 类 号：TN953.5[电子电信—信号与信息处理]