Authors: ChiaHsin Cheng JenYung Lin ChaoKai Wen JyhHorng Wen
Publish Date: 2008/06/03
Volume: 48, Issue: 2, Pages: 311-325
Abstract
In this paper a convenient signaling scheme called orthogonal on–off BPSK O3BPSK along with a simple oneshot linear decorrelating detector LDD and a whitening Rake bank is proposed for near–far resistant detection in asynchronous DS/CDMA systems Based on the maximum multipath spreading delay a minimum duration of “off” is suggested during which the temporally adjacent bits TABs that contain multiuser interference MUI and intersymbol interference ISI from different users at the receiver are decoupled The O3BPSK signaling scheme is combined with the whitening Rake receiver to preserve multipath diversity gain in multipath fading CDMA channels The scheme offers low complexity no detection delay near–far resistance and compensation for fading channels
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