| 无源双基地脉冲雷达频率同步误差影响分析 |
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| 引用本文： | 刘永,张财生,何友.无源双基地脉冲雷达频率同步误差影响分析[J].舰船电子工程,2011,31(10):31-34,59. |
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| 作者姓名： | 刘永 张财生 何友 |
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| 作者单位： | 1. 海军驻南京地区航天机电系统军事代表室,南京,210006
2. 海军航空工程学院信息融合技术研究所,烟台,264001 |
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| 基金项目： | 国家自然科学基金项目(编号:60672139,60972160)资助 |
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| 摘 要： | 在无源双基地脉冲雷达系统中,由于直达波信号的起伏,非合作接收系统难以对雷达辐射源的频率进行精确估计,因而导致接收与发射平台间总是存在频率同步误差。针对中频正交处理器的幅相不平衡度是频率的函数,文章首先给出了存在一定频率同步误差时接收系统输出的频谱和功率损耗,定性指出了频率同步误差对无源双基地雷达动目标检测的影响,然后为定量分析系统相参处理后输出的多个干扰频率分量的影响,定义了归一化干扰功率并推导了其与幅相不平衡度间的解析表达式,同时给出了多种信杂比条件下的量化分析结果。研究结果表明,无源双基地脉冲雷达相参处理输出的多个干扰频率分量将导致目标通道输出的信杂比急剧减小,严重影响目标信号的检测和参数估计。
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| 关 键 词： | 无源双基地雷达 频率同步误差 归一化干扰功率 杂波可见度 |
Impact of Frequency Synchronization Error on Passive Bistatic Pulse Radar |
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| Liu Yong Zhang Caisheng He You,Nanjing ,Yantai.Impact of Frequency Synchronization Error on Passive Bistatic Pulse Radar[J].Ship Electronic Engineering,2011,31(10):31-34,59. |
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| Authors: | Liu Yong Zhang Caisheng He You Nanjing Yantai |
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| Institution: | Liu Yong1) Zhang Caisheng2) He You2)(Naval Representative Office of Aerospace Mechanical and Electrical System in Nanjing District1),Nanjing 210006)(Research Inst.of Information Fusion,Naval Aeronautical and Astronautical Univ.2),Yantai 264001) |
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| Abstract: | In passive bistatic coherent radar system,the receiver needs to independently solve the problem of frequency synchronizations via the fluctuating direct-path signal.Under the circumstances,however,it is difficult to achieve highly accurate frequency synchronization since the instantaneous frequency measurement accuracy depends on the signal to noise ratio of the direct-path signal.In this paper,we focused on the impact of frequency synchronization error(FSE) on passive bistatic pulse radar system which adop... |
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| Keywords: | passive bistatic radar(PBR) frequency synchronization error(FSE) normalized interference power(NIP) sub-clutter bisibility(SCV) |
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