Title :
A computationally efficient MIMO turbo-equaliser
Author :
Kansanen, Kimmo ; Matsumoto, Tad
Author_Institution :
Centre for Wireless Commun., Oulu Univ., Finland
Abstract :
A reduced complexity version of the soft-interference cancelling MMSE turbo equalizer is proposed for single-carrier MIMO systems. In the receiver exact symbol-by-symbol interference covariance matrice inverses are replaced by time averages acquired through matrix inversion lemma iterations. Consequently, also the requirement to explicitly estimate signal-to-noise ratio is removed. After a number of iterations the equalizer is further simplified by utilizing the matched filter approximation. Remaining multipath and multiuser interference, in addition to receiver noise, are accounted for in the approximation. The performance of the receiver is verified through simulations with two MIMO radio network configurations.
Keywords :
MIMO systems; computational complexity; equalisers; interference suppression; intersymbol interference; iterative methods; least mean squares methods; matched filters; matrix inversion; radio networks; radio receivers; radiofrequency interference; MIMO radio network configurations; MIMO turbo-equaliser; matched filter approximation; matrix inversion lemma iterations; multipath interference; multiple input multiple output; multiuser interference; receiver noise; signal-to-noise ratio; single-carrier MIMO systems; soft-interference cancelling MMSE turbo equalizer; symbol-by-symbol interference covariance matrice inverses; Computational complexity; Covariance matrix; Filtering; Interference; Iterative algorithms; MIMO; Matched filters; Receivers; Signal to noise ratio; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Print_ISBN :
0-7803-7757-5
DOI :
10.1109/VETECS.2003.1207546
