Chirp signal detection using FFT peak frequency difference [Correspondence]
Chi‐Hao Cheng, Lihyeh L. Liou, James Tsui, David Ming Lin · IEEE Transactions on Aerospace and Electronic Systems · 2016
A new method was proposed for chirp signal detection and estimation built on the frame-based fast Fourier transform (FFT). The proposed method uses the peak frequency difference between FFT frames to detect a chirp signal and estimate chirp rate. This approach differs from conventional methods and is easy to implement. It generates more accurate chirp rate estimation especially under a low signal-to-noise ratio. Simulation and experimental data are used to verify the proposed methods.