Title :
Iterative Channel Estimation and Equalization for STBC MC-CDMA System over Time- and Frequency-Selective Fading Channels
Author :
Hassan, Mohamed A S ; Sharif, Bayan S. ; Woo, Wai Lok ; Hmidat, Adel M.
Author_Institution :
Sch. of Electr., Electron. & Comput. Eng., Newcastle Univ., Newcastle upon Tyne
Abstract :
This paper investigates the performance of a downlink space-time block code (STBC) multi-carrier code division multiple access (MC-CDMA) system employing a receiver with iterative channel estimation (ICE) and iterative equalization (IE). ICE based on the Kalman filter whereas IE based on the minimum mean square error (MMSE) equalizer. The performance of this system is investigated under time-varying multipath fading channels with different fading rates. Simulation results demonstrate that a signal-to-noise ratio (SNR) gain of2-2.5 dB can be added when employing ICE and IE for 4 iterations with only few training symbols (less than 10% of bandwidth efficiency loss) even when channels have high fading rate
Keywords :
Kalman filters; block codes; channel estimation; code division multiple access; fading channels; multipath channels; receivers; time-varying channels; Kalman filter; STBC MC-CDMA system; downlink space-time block code; frequency-selective fading channels; iterative channel equalization; iterative channel estimation; minimum mean square error equalizer; multicarrier code division multiple access; receiver; time-selective fading channels; time-varying multipath fading channels; Block codes; Channel estimation; Downlink; Equalizers; Frequency-selective fading channels; Ice; Mean square error methods; Multicarrier code division multiple access; Signal to noise ratio; Time varying systems;
Conference_Titel :
Information and Communication Technologies, 2006. ICTTA '06. 2nd
Conference_Location :
Damascus
Print_ISBN :
0-7803-9521-2
DOI :
10.1109/ICTTA.2006.1684809
