Instantaneous frequency estimation for radar NLFM signal using combined STFT and TFD ridge smoothing technique

H. Milczarek; A. Kawalec

doi:10.1117/12.2524516

27 March 2019 Instantaneous frequency estimation for radar NLFM signal using combined STFT and TFD ridge smoothing technique

H. Milczarek, A. Kawalec

Author Affiliations +

Proceedings Volume 11055, XII Conference on Reconnaissance and Electronic Warfare Systems; 110550A (2019) https://doi.org/10.1117/12.2524516
Event: XII Conference on Reconnaissance and Electronic Warfare Systems, 2018, Oltarzew, Poland

Abstract

The paper presents a novel method for NLFM radar signal instantaneous frequency estimation. Up to now there are only a few limited reports in this field. The method involves combined short-time Fourier transform and IF curve smoothing in time – frequency plane. The algorithm performs a fine estimation of instantaneous frequency of noise buried signals up to -3 dB. Due to FFT and simple filtering application, there is no high computational load needed. Simulation results indicate that the algorithm is robust and outperforms well-known phase differentiation method.

Citation Download Citation

H. Milczarek and A. Kawalec "Instantaneous frequency estimation for radar NLFM signal using combined STFT and TFD ridge smoothing technique", Proc. SPIE 11055, XII Conference on Reconnaissance and Electronic Warfare Systems, 110550A (27 March 2019); https://doi.org/10.1117/12.2524516

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