星载双基跟飞构型的杂波特性分析及参数选择

doi:10.12305/j.issn.1001-506X.2023.09.11

摘要/Abstract

摘要：

星载双基地雷达收发分置, 双基构型导致了分辨率空变和严重的空时谱展宽, 目标检测面临极大的挑战。本文基于严格的斜距历程和星地关系, 同时考虑分辨率空变性的影响, 建立了星载双基地雷达的杂波信号模型, 分析了跟飞构型下分辨率空变性及其对杂波谱分布的影响。在此基础上, 结合全链路评估模型, 以输出信杂噪比损失为指标, 分析了观测区域和基线长度对性能的影响, 明确了跟飞构型下的关键参数选择依据, 能够为实际跟飞构型的系统设计提供参考。

关键词: 星载双基地雷达, 杂波模型, 杂波特性, 轨道构型

Abstract:

The transmitter and receiver of spaceborne bistatic radar are placed on different satellites, bistatic configurations cause resolution spatial variation and severe space-time power spectrum broadening, posing great challenge to moving target indication. Based on strict slant range and satellite-earth relation, and taking into consideration the influence of resolution spatial variation, a signal model of clutter is established and the resolution spatial variation and its influence on the distribution of space-time power spectrum are analysed. Drawing on the full link evaluation mode and the index of output signal-to-clutter-plus-noise ratio loss, the performance under the influence of observation area and baseline is analysed and criteria for selecting key parameters in same orbital following configuration are specified. This paper provides references for system design of same orbital following configuration.

Key words: spaceborne bistatic radar, clutter model, clutter characteristics, orbital configuration

中图分类号:

TN951

谭啸, 杨志伟, 何鹏远, 吴翔宇. 星载双基跟飞构型的杂波特性分析及参数选择[J]. 系统工程与电子技术, 2023, 45(9): 2735-2743.

Xiao TAN, Zhiwei YANG, Pengyuan HE, Xiangyu WU. Analysis of clutter characteristics and parameters selection for following configuration of spaceborne bistatic radar[J]. Systems Engineering and Electronics, 2023, 45(9): 2735-2743.

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参数	发射站	接收站
轨道高度/km	632.589	632.589
轨道倾角/(°)	5	5
升交点赤经/(°)	0	0
近地点幅角/(°)	20	0
偏心率	0	0
真近点角/(°)	0	0

参数	取值
雷达载频/GHz	1.3
信号带宽/MHz	20
平均发射功率/kW	4
脉冲数/个	90
接收通道数/个	12
脉冲重频/Hz	5 000
系统损耗/dB	11
噪声系数/dB	3
发射天线尺寸/(m×m)	30×2(方位×俯仰)
接收天线尺寸/(m×m)	30×2(方位×俯仰)

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