Title :
Instantaneous frequency estimation using the crossterm deleted Wigner representation (CDWR)
Author :
Kadambe, Shubha ; Orr, Richard S.
Author_Institution :
Atlantic Aerosp. Electron. Corp., Greenbelt, MD, USA
Abstract :
In this paper, an instantaneous frequency (IF) estimator based on the crossterm deleted Wigner representation (CDWR) is described. The performance of this estimator is verified by deriving the mean and the variance of the estimate. It has been demonstrated that the estimator is unbiased minimum variance under certain constraints. The Cramer-Rao lower bound for the two types of signals considered here are also derived. From the experimental results it can be seen that the mean square error of the estimates of the IF of these two types of signals is close to the theoretical bound at signal to noise ratios (SNR) greater than -3 dB
Keywords :
Wigner distribution; error statistics; frequency estimation; signal representation; Cramer-Rao lower bound; SNR; crossterm deleted Wigner representation; estimate mean; estimate variance; instantaneous frequency estimation; mean square error; performance; signals; unbiased minimum variance; Aerospace electronics; Frequency estimation; Mean square error methods; Radar signal processing; Signal processing; Signal processing algorithms; Signal resolution; Signal to noise ratio; Sonar; Time frequency analysis;
Conference_Titel :
Time-Frequency and Time-Scale Analysis, 1996., Proceedings of the IEEE-SP International Symposium on
Conference_Location :
Paris
Print_ISBN :
0-7803-3512-0
DOI :
10.1109/TFSA.1996.547470
