基于CDR数字音频广播的无源雷达模糊函数分析与处理

Q2 Physics and Astronomy 雷达学报 Pub Date : 2015-01-01 DOI:10.12000/JR14050

Zhang Qiang, W. XianRong, Fu Yan, Rao Yunhua, Gong Ziping

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引用次数: 1

摘要

中国数字广播(CDR)是我们研发的调频频率(87- 108mhz)数字音频广播新标准。它与模拟调频广播中的频谱兼容，满足了中国调频广播中模拟信号向数字信号平稳过渡的要求。本文主要研究了基于无线电的无源雷达的信号特性和处理方法。分析了无源雷达光源的信号特性和模糊函数。研究了循环前缀、信号同步引起的多普勒模糊条带以及信号不连续频谱引起的侧峰范围对目标检测的不利影响。最后，提出了抑制这些侧峰的方法，并通过仿真验证了其有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Ambiguity Function Analysis and Processing for Passive Radar Based on CDR Digital Audio Broadcasting

China Digital Radio (CDR) broadcasting is a new standard of digital audio broadcasting of FM frequency (87-108 MHz) based on our research and development efforts. It is compatible with the frequency spectrum in analog FM radio and satisfies the requirements for smooth transition from analog to digital signal in FM broadcasting in China. This paper focuses on the signal characteristics and processing methods of radio-based passive radar. The signal characteristics and ambiguity function of a passive radar illumination source are analyzed. The adverse effects on the target detection of the side peaks owing to cyclic prefix, the Doppler ambiguity strips because of signal synchronization, and the range of side peaks resulting from the signal discontinuous spectrum are then studied. Finally, methods for suppressing these side peaks are proposed and their effectiveness is verified by simulations.

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