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IF estimation of FM signals based on time-frequency image

机译:基于时频图像的FM信号的IF估计

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摘要

This paper addresses the problem of estimating the instantaneous frequency (IF) of multicomponent radar signals, which are assumed to be frequency-modulated (FM). The difficulties lie in that different FM components which overlap in time-frequency (TF) domain have different time-supports, and their spectral contents may present continuous and stepped IF laws. We propose an IF estimation algorithm by exploiting the combination of TF distributions (TFDs) and image processing techniques. Numerical results are provided to demonstrate desirable capabilities of the proposed algorithm.
机译:本文解决了估计多分量雷达信号的瞬时频率(IF)的问题,假定该多分量雷达信号是调频(FM)的。困难在于,在时频(TF)域重叠的不同FM分量具有不同的时间支持,并且它们的频谱内容可能呈现连续和阶梯式中频定律。通过利用TF分布(TFD)和图像处理技术的组合,我们提出了IF估计算法。提供数值结果以证明所提出算法的理想功能。

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