ANALYSIS TECHNIQUES FOR SIGNALS HAVING TIME-VARYING FREQUENCIES

Authors
  1. Wong, K.M.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);McMaster Univ, Hamilton ONT (CAN)
Abstract
In various signal transmission environments such as sonar and radar, we often encounter signals with time-varying frequencies. This report examines four major methods which estimate the frequencies of the signals at various instants. The four methods are (i) the Wigner distribution, (ii) the spectrogram, (iii) the transformed spectrogram, and (iv) the phase interpolation estimation. The theoretical biases and variances involved in the use of these methods are developed and compared with the lower bound of the estimates. Computer simulation results are also presented so that the performances of these methods under different signal-to-noise ratios can be compared.
Report Number
DREA-CR-88-403 — Contractor Report
Date of publication
15 Feb 1988
Number of Pages
151
DSTKIM No
88-02728
CANDIS No
55951
Format(s):
Hardcopy;Originator's fiche received by DSIS

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