强直达波干扰下量化处理对微弱回波信号采集损失的影响
摘要
收发分置地基相控阵雷达探测空间碎片时,收发站间直达信号干扰强、接收目标回波信号微弱,为了满足接收机动态范围和采集设备参数,接收系统采集量化接收信号所能采用的量化间隔将大于目标回波信号功率水平,会导致目标微弱回波能量的损失。对此,首先分析接收信号量化统计特性,并研究了接收信号采集的“量化准则”,然后针对高斯噪声背景,提出了基于“量化准则”分析强直达波干扰下微弱目标回波信号采集量化信噪比损失与量化间隔和噪声功率间的关系,指出只要量化间隔小于噪声均方差一定倍数,微弱目标回波信噪比不会受到采集量化的影响,且与直达波功率水平无关,最后通过计算机仿真验证了理论分析的正确性,为直达波干扰下微弱信号采集量化等其他方面微弱信号的采集量化提供理论指导参考。
出处
《电信技术研究》
2014年第6期13-19,共7页
Research on telecommunication technology
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