Joint Antenna Diversity and Frequency-Domain Equalization for Multi-Rate MC-CDMA

Fumiyuki ADACHI  Tomoki SAO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E86-B   No.11   pp.3217-3224
Publication Date: 2003/11/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Terrestrial Radio Communications
Keyword: 
MC-CDMA,  MMSEC,  frequency-domain equalization,  antenna diversity,  frequency-selective channel,  

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Summary: 
For the reception of MC-CDMA signals in a frequency-selective fading channel, frequency-domain equalization is necessary before despreading. In this paper, joint antenna diversity combining and one-tap frequency-domain equalization is considered (simply referred to as the joint antenna diversity & equalization, in this paper). A receiver structure for joint antenna diversity & equalization is presented and the unified weights based on minimum mean square error (MMSE) criterion are found in the presence of multi-users with different spreading factors and transmit powers. For comparison, antenna diversity combining after despreading using MMSE combining (MMSEC) is also considered. The achievable bit error rate (BER) performances with joint antenna diversity & equalization and with antenna diversity after MMSEC despreading in a frequency-selective Rayleigh fading channel are evaluated by computer simulations and compared.