Title :
Toeplitz method for blind equalization in MIMO OFDM systems
Author :
Abrudan, Traian ; Hjorungnes, A. ; Koivunen, Visa
Author_Institution :
Signal Process Lab., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
In this paper we address the problem of blind recovery of multiple OFDM streams in a multiple-input multiple-output (MIMO) system. We propose an equalization algorithm which is based on a combined criterion that cancels both inter-symbol interference (ISI), and co-channel interference (CCI). ISI is minimized by using a modified vector constant modulus (VCM) criterion, while CCI is minimized by a decorrelation criterion.
Keywords :
MIMO systems; OFDM modulation; Toeplitz matrices; blind equalisers; cochannel interference; intersymbol interference; vectors; CCI; ISI; MIMO system; OFDM; Toeplitz method; VCM; blind equalization; co-channel interference; inter-symbol interference; modified vector constant modulus; multiple-input multiple-output; orthogonal frequency division multiplexing; Autocorrelation; Blind equalizers; Cost function; Decorrelation; MIMO; OFDM; Periodic structures; Radiofrequency interference; Signal processing algorithms; Training data;
Conference_Titel :
Communications, 2004 International Zurich Seminar on
Print_ISBN :
0-7803-8329-X
DOI :
10.1109/IZS.2004.1287427
