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

fYear

2007

fDate

24-27 Nov. 2007

Firstpage

456

Lastpage

459

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICSPC.2007.4728354

Filename

4728354