采样速率偏差对数字电视外辐射源雷达性能影响研究

发布时间：2018-03-17 19:24

本文选题：外辐射源雷达　切入点：采样速率偏差　出处：《电子与信息学报》2017年10期 　论文类型：期刊论文

【摘要】：外辐射源雷达利用非合作照射源信号探测目标,参考信号提纯和监测信号杂波抑制是实现目标信号检测的关键。该文针对数字电视外辐射源雷达接收系统中存在的采样速率偏差问题,首先建立信号模型,从理论上分析了采样速率偏差对参考信号重构性能的影响,然后探讨了采样速率偏差对时域杂波抑制和相关匹配接收的影响。仿真结果说明存在采样速率偏差时,提高接收端采样速率可以降低参考信号的重构误码率;不同的时域杂波抑制算法对采样速率偏差的表现不同;采样速率偏差对时域杂波抑制的影响较大,对相关匹配接收的影响较小。实测数据处理验证了上述结论的正确性,为提高数字电视外辐射源雷达的目标探测性能提供了理论依据。
[Abstract]:External emitter radar uses non-cooperative source signals to detect targets, The key of target signal detection is to purify reference signal and suppress clutter of monitoring signal. In order to solve the problem of sampling rate deviation in digital television external emitter radar receiving system, a signal model is established. The influence of sampling rate deviation on the performance of reference signal reconstruction is analyzed theoretically, and then the influence of sampling rate deviation on time domain clutter suppression and correlation matching reception is discussed. Increasing the sampling rate at the receiving end can reduce the reconstruction error rate of the reference signal; different time domain clutter suppression algorithms have different performance on the sampling rate deviation; the sampling rate deviation has a great effect on the time domain clutter suppression. The experimental data processing verifies the correctness of the above conclusions and provides a theoretical basis for improving the target detection performance of digital television external emitter radar.
【作者单位】：武汉大学电子信息学院;
【基金】：国家重点研发计划(2016YFB0502403) 国家自然科学基金(61331012,61371197,U1333106,61271400) 湖北省科技厅项目(2015BCE075,2016CFA061) 博士后创新人才支持计划(BX201600117)~~
【分类号】：TN958

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