Title :
Performance analysis of subspace-based signature waveform estimation algorithms for DS-CDMA systems with unknown correlated noise
Author :
Zarifi, Keyvan ; Gershman, Alex B.
Author_Institution :
Dept. of Comm. Syst., Univ. of Duisburg-Essen, Duisburg, Germany
Abstract :
We obtain analytical expressions for the mean-square error (MSE) of two recent popular blind subspace-based signature waveform estimation techniques proposed by Wang and Poor and Buzzi and Poor for direct-sequence code division multiple-access (DS-CDMA) systems with unknown correlated noise. Simple high SNR approximations of the obtained formulae are found that explicitly clarify how the performance of these techniques depends on the environmental parameters of interest and how it is related to that of the conventional techniques that are based on the standard white noise assumption.
Keywords :
blind equalisers; channel estimation; code division multiple access; correlation theory; mean square error methods; spread spectrum communication; white noise; DS-CDMA system; MSE; approximation theory; blind subspace algorithm; correlated noise; direct-sequence code division multiple-access; environmental parameter; mean-square error; performance analysis; signature waveform estimation; white noise; Additive noise; Covariance matrix; Multiaccess communication; Multiuser detection; Performance analysis; Receiving antennas; Signal processing; Signal to noise ratio; White noise; Working environment noise;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2005 IEEE 6th Workshop on
Print_ISBN :
0-7803-8867-4
DOI :
10.1109/SPAWC.2005.1506210
