Maximum-Likelihood Subchannel Detection in Forward Links for Multicarrier DS CDMA System

Jianjun LI
Pingyi FAN
Zhigang CAO

IEICE TRANSACTIONS on Communications   Vol.E84-B    No.11    pp.2924-2931
Publication Date: 2001/11/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technology
subchannel detection,  multicarrier CDMA,  wireless communication,  

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In this paper, we consider the subchannel detection problem in forward links for the multicarrier DS-CDMA system when some different subchannel allocation policies are used. An optimal subchannel decision algorithm is proposed based on the maximum-likelihood (ML) criterion. Theoretical analysis and simulation results are presented. Furthermore, we discuss the parameter selection problem on the length of the training sequences in the subchannel allocation scheme in [8],[12] by using the proposed ML detection algorithm. The results show that the subchannel allocation scheme in [8],[12] is feasible since only a few symbols overhead is required.