AU - S. Sadri,
AU - S. Gazor and A. M. Doosthoseini,
TI - Windowing Effects of Short Time Fourier Transform on Wideband Array Signal Processing Using Maximum Likelihood Estimation
PT - JOURNAL ARTICLE
TA - iut-jcme
JN - iut-jcme
VO - 17
VI - 2
IP - 2
4099 - http://jcme.iut.ac.ir/article-1-134-en.html
4100 - http://jcme.iut.ac.ir/article-1-134-en.pdf
SO - iut-jcme 2
ABĀ - During the last two decades, Maximum Likelihood estimation (ML) has been used to determine Direction Of Arrival (DOA) and signals propagated by the sources, using narrowband array signals. The algorithm fails in the case of wideband signals. As an attempt by the present study to overcome the problem, the array outputs are transformed into narrowband frequency bins, using short time Fourier transform together with ML, to estimate DOAs and the signals. The effect of window parameters (i.e, type, length and decimation factor) on the bias and variance of estimation of DOAs and signals is investigated. The algorithm robustness and convergence in presence of low SNR and coherent signals is illustrated. It is also shown that the local optimal problem encountered in the narrowband case is resolved for the wideband signals.
CP - IRAN
IN -
LG - eng
PB - iut-jcme
PG - 29
PT - Research
YR - 1998