Title :
A block-Toeplitz VCMA equalizer for MIMO-OFDM systems
Author :
Abrudan, Traian ; Sirbu, Marius ; Koivunen, Visa
Author_Institution :
Signal Process. Laboratory, Helsinki Univ. of Technol., Espoo, Finland
Abstract :
In this paper we consider the problem of blind recovery of multiple OFDM signals in a MIMO system. The equalization algorithm is based on composite criterion which is able to cancel both inter-symbol interference (ISI) and inter-user interference (IUI). We propose a modified version of vector constant modulus algorithm (VCMA) which exploits the Toeplitz structure of the equalization matrix, in order to cancel the ISI. The IUI is mitigated by a second decorrelation criterion.
Keywords :
MIMO systems; OFDM modulation; Toeplitz matrices; decorrelation; intersymbol interference; vectors; MIMO-OFDM systems; blind recovery; block-Toeplitz VCMA equalizer; equalization matrix; intersymbol interference; interuser interference; multiple-input multiple-output systems; orthogonal frequency division multiplexing; second decorrelation criterion; vector constant modulus algorithm; Blind equalizers; Convolution; Cost function; Decorrelation; Interference cancellation; Intersymbol interference; Laboratories; OFDM modulation; Signal processing algorithms; Training data;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Seventh Asilomar Conference on
Print_ISBN :
0-7803-8104-1
DOI :
10.1109/ACSSC.2003.1292083
