Title :
MMSE based iterative turbo equalization for antenna switching system
Author :
Yildirim, Recep Ali ; Yilmaz, A. Özgür
Author_Institution :
Elektrik ve Elektron. Muhendisligi, Orta Dogu Teknik Univ., Ankara, Turkey
Abstract :
In this paper, we study the performance of an antenna switching (AS) system in a multipath Rayleigh fading channel in comparison to an Alamouti coded system. We propose a minimum mean-squared error based iterative equalizer for the multi-antenna system. In the proposed receiver, MMSE equalization and channel decoding are jointly carried out at each iteration by using the a priori probabilities from previous iterations. It is observed that Alamouti based scheme performs better when the channel state information is perfect. It turns out that the antenna switching based system performs significantly better in the case of imperfect channel state information.
Keywords :
Rayleigh channels; antenna arrays; decoding; equalisers; iterative methods; least mean squares methods; Alamouti coded system; MMSE equalization; a priori probability; antenna switching system; channel decoding; imperfect channel state information; iterative equalizer; iterative turbo equalization; minimum mean squared error; multiantenna system; multipath Rayleigh fading channel; Antennas; Binary phase shift keying; Channel state information; Fading; Iterative decoding; Viterbi algorithm; Wireless communication;
Conference_Titel :
Signal Processing and Communications Applications Conference (SIU), 2010 IEEE 18th
Conference_Location :
Diyarbakir
Print_ISBN :
978-1-4244-9672-3
DOI :
10.1109/SIU.2010.5651420
