Micro-Doppler Parameter Estimation Using Radar

Abstract

Doppler effect is the apparent difference between the frequency at which a signal is transmitted and that at which they reach an observer. It is induced due to the bulk motion of radar targets. When a signal reaches its target, it traverses back to the transmitter. When these radar targets have an arbitrary motion involved, we observe a phenomenon called Micro-Doppler effect. This project aims to estimate various radar parameters due to this phenomenon. We introduce this effect in radar and compute various modulations.

Our analyses use the Fourier transform and computation of Fourier Bessel coefficients extensively. We weigh the pros and cons of this approach and advance to another technique that makes use of high-resolution time-frequency transform to analyze time-varying Micro-Doppler effects. We have also used certain other concepts such as Hankel Transform, Bessel Functions and Integration to calculate the coefficients. As the Doppler Effect is termed due to the effect of sound produced by moving objects at a certain speed, Micro-Doppler signal has the properties of a target with moving blades. Hence, various applications like the calculation of rotational and vibrational components use this concept. In this report we restrict ourselves with the study of rotational components only.