Title :
Joint time delay and Doppler stretch estimation using wideband signals
Author :
Jin, Q. ; Wong, K.M. ; Luo, Z.Q.
Author_Institution :
Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont., Canada
Abstract :
The authors discuss the application of the wavelet transform. The theoretical performance is derived. The joint maximum likelihood estimation is presented and the Cramer-Rao lower bound (CRLB) obtained. The joint estimation using the wavelet transform is shown to be more robust, and under high signal to noise ratio it is unbiased and the estimation variance is close to the CRLB for a large variety of signals. All these results are verified by computer simulations. It is demonstrated that the estimation accuracy depends on the signal structure, and the optimum signal structure is strongly related to the form of its wavelet transform
Keywords :
Doppler effect; delays; maximum likelihood estimation; parameter estimation; signal processing; wavelet transforms; Cramer-Rao lower bound; Doppler stretch estimation; computer simulations; estimation accuracy; estimation variance; joint maximum likelihood estimation; optimum signal structure; time delay estimation; wavelet transform; wideband signals; Continuous wavelet transforms; Delay effects; Delay estimation; Gaussian noise; Maximum likelihood estimation; Narrowband; Signal to noise ratio; Sonar; Wavelet transforms; Wideband;
Conference_Titel :
Statistical Signal and Array Processing, 1992. Conference Proceedings., IEEE Sixth SP Workshop on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0508-6
DOI :
10.1109/SSAP.1992.246838
