天发船收高频雷达海面目标回波建模  

Modeling of Target Echo for Shipborne High Frequency Hybrid Sky-surface Wave Radar

作　　者：丁明凯 童鹏[1,2] 位寅生 Ding Mingkai;Tong Peng;Wei Yinsheng(School of Electronics and Information Engineering,Harbin Institute of Technology,Harbin,Heilongjiang 150001,China;Key Laboratory of Marine Environmental Monitoring and Information Processing,Ministry of Industry and Information Technology,Harbin,Heilongjiang 150001,,China)

机构地区：[1]哈尔滨工业大学电子与信息工程学院,黑龙江哈尔滨150001 [2]工业和信息化部海洋环境监测与信息处理重点实验室,黑龙江哈尔滨150001

出　　处：《信号处理》2020年第12期2007-2015,共9页Journal of Signal Processing

基　　金：国家自然科学基金(61831010);黑龙江省自然科学基金(JQ2019F001)。

摘　　要：天发船收高频雷达系统中,由于电离层随机扰动和接收船六维摆动运动影响,目标回波空时谱发生展宽和形变,严重影响雷达探测性能。本文对天发船收高频雷达海面目标回波建模问题开展研究,首先分析了动态空间几何关系变化下目标回波的多普勒频移特性,建立了理想条件下的空时目标回波模型;在此基础上,引入电离层不规则体和六维摆动空时相位扰动影响,分别构建电离层随机扰动相位仿真器和六维摆动扰动相位模型,进而建立了天发船收高频雷达扰动目标空时回波模型,实验数据验证了模型的有效性。The space-time spectrum of target echoes are broadened and deformed in a shipborne high frequency radar via hybrid sky-surface wave propagation,which seriously affects the radar detection performance,due to the influence of the ionospheric random perturbation and the six degree of freedom motion of the receiving ship.This paper investigates the problem of modeling target echoes for this radar system.Firstly,the Doppler frequency shift characteristics of the target echo under dynamic spatial geometry are analyzed and the space-time target echo model under ideal conditions is established;On this basis,introducing the space-time phase perturbation effects of ionospheric irregularities and the six degree of freedom motion,the ionospheric random perturbation phase simulator and the six-dimensional oscillating perturbation phase model are constructed,respectively,and then the space-time target echo model of the shipborne high frequency radar via hybrid sky-surface wave propagation is established.Experimental data verify the effectiveness of the model.

关 键 词：天发船收高频雷达 目标空时回波模型 目标多普勒频移模型 电离层不规则体相位扰动 六维摆动相位扰动 

分 类 号：TN958.93[电子电信—信号与信息处理]