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| Impact of Sampling Frequency Offset on Performance of Passive Radar Using Digital TV Signals |
| WAN Xianrong CHENG Yiyao YI Jianxin ZHANG Xun |
| (School of Electronic Information, Wuhan University, Wuhan 430072, China) |
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Abstract Passive radar makes full use of non-cooperative illumination source to detect targets. Reference signal purification and clutter suppression of the surveillance signal are two key steps to achieve target signal detection. To solve the problem of the sampling frequency offset in digital TV based passive radar, the signal model is first established, and the impact of the sampling frequency offset on the performance of the reference signal reconstruction is analyzed. Then how the sampling frequency offset affects the clutter suppression and the target correlation matching is mainly investigated. The simulation results show that improving the sampling frequency can reduce the symbol error rate of the reconstructed signal. Different temporal clutter suppression algorithms perform differently under the existence of sampling frequency offset. The sampling frequency offset has a greater impact on the temporal clutter rejection performance and less effect on correlation matching. Finally, the analysis results are verified by the measurement data, which also provide theoretical basis on improving the target detection performance of digital TV based passive radar.
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Received: 24 February 2017
Published: 27 June 2017
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| Fund:The National Key Research and Development Program (2016YFB0502403), The National Natural Science Foundation of China (61331012, 61371197, U1333106, 61271400), The Science and Technology Division Project of Hubei Province (2015BCE075, 2016CFA061), Postdoctoral Innovation Talent Support Program (BX201600117) |
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Corresponding Authors:
WAN Xianrong
E-mail: xrwan@whu.edu.cn
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