Title :
Further results on the DS-WRELAX algorithm for the delay and Doppler scale estimation of multiple moving targets
Author :
Su, Zhigang ; Wu, Renbiao ; Yu, Jianpii
Author_Institution :
Signal Process. & Commun. Res. Lab., Civil Aviation Univ. of China, Tianjin, China
Abstract :
A statistically and computationally efficient algorithm, which was referred to as DS-WRELAX, was proposed for the delay and Doppler scale estimation of multiple closely spaced moving targets. The performance of DS-WRELAX was further investigated in this paper. Comparison with another similarly structured algorithm FML (fast maximum likelihood) due to D.W. Tufts (1993) shows that DS-WRELAX can significantly outperform FML. We also explain why the SNR (signal-to-noise ratio) threshold for the phase estimates is much higher than that of other unknown parameters and point out that this phenomenon is algorithm-independent
Keywords :
Doppler effect; delay estimation; noise; phase estimation; statistical analysis; DS-WRELAX algorithm; Doppler scale estimation; FML algorithm; SNR threshold; computationally efficient algorithm; delay estimation; fast maximum likelihood; multiple moving targets; phase estimates; signal processing; signal-to-noise ratio; statistically efficient algorithm; Cost function; Delay effects; Delay estimation; Gaussian noise; Maximum likelihood estimation; Phase estimation; Signal processing; Signal processing algorithms; Signal to noise ratio; Telephony;
Conference_Titel :
Signal Processing Proceedings, 2000. WCCC-ICSP 2000. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-5747-7
DOI :
10.1109/ICOSP.2000.894475
