Title :
Blind Channel Equalization and Carrier Frequency Offset Estimation for MC-CDMA Systems using Guard Interval Redundancy and Excess Codes
Author :
Djebbar, A.B. ; Abed-Meraim, K. ; Djebbari, A.
Author_Institution :
TTNS Lab., Univ. of Sidi Bel Abbes, Algeria
Abstract :
It is well known that multipath channel and carrier frequency offset destroy the orthogonality between subcarriers in the downlink of MC-CDMA and degrade the system performance. In this paper, a new low complexity algorithm is proposed to iteratively estimate the carrier frequency offset (CFO) and the channel equalizer using only the guard interval (GI) redundancy, or excess codes (EC) or both (GI) and (EC) without additional pilots. Simulations illustrate and compare the performance efficiency of these schemes in different scenarios.
Keywords :
blind equalisers; channel estimation; code division multiple access; multipath channels; MC-CDMA systems; blind channel equalization; carrier frequency offset estimation; excess codes; guard interval redundancy; multipath channel; Blind equalizers; Degradation; Downlink; Fading; Frequency estimation; Multiaccess communication; Multicarrier code division multiple access; OFDM modulation; System performance; Vectors;
Conference_Titel :
Signal Processing and Communications, 2007. ICSPC 2007. IEEE International Conference on
Conference_Location :
Dubai
Print_ISBN :
978-1-4244-1235-8
Electronic_ISBN :
978-1-4244-1236-5
DOI :
10.1109/ICSPC.2007.4728354
