利用光子实时傅里叶变换的微波到达角测量

Z. Wang, Dan Zhu, Bowen Zhang, Jiewen Ding, S. Pan
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引用次数: 0

摘要

提出并演示了一种基于光子实时傅里叶变换(RTFT)的微波到达角测量系统。在该系统中,光子RTFT是利用时间谱卷积系统实现的,该系统由光脉冲源、电光调制器和一对色散值互补的色散元件组成。得到线性调频(LFM)信号的时延,并以此计算到达时差分(TDOA)和相应的AOA。进行了概念验证实验。AOA测量范围为25°~ 155°,测量误差小于3.4°。该方案克服了传统AOA测量系统存在的相位模糊问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Microwave angle-of-arrival measurement utilizing photonic real-time Fourier transformation
A microwave angle-of-arrival (AOA) measurement system based on the photonic real-time Fourier transformation (RTFT) is proposed and demonstrated. In the proposed system, photonic RTFT is implemented utilizing the temporal-spectrum convolution system, which is composed by an optical pulse source, an electro-optical modulator and a pair of dispersive elements with complementary dispersion values. The time delay of the linearly frequency-modulated (LFM) signals can be obtained, which are used to calculate the time-difference-of arrival (TDOA) and the corresponding AOA. A proof-ofconcept experiment is taken. The AOA measurement range from 25° to 155° is achieved with a measurement error of less than 3.4°. In this scheme, the problem of phase ambiguity in traditional AOA measurement systems is overcome.
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