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Title of Journal: Wireless Pers Commun

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Abbravation: Wireless Personal Communications

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Springer US

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DOI

10.1007/978-1-4612-5885-8

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1572-834X

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Effects of NakagamiFading Parameters and Power Co

Authors: Mohamad DosaranianMoghadam Hamidreza Bakhshi Gholamreza Dadashzadeh
Publish Date: 2012/01/12
Volume: 68, Issue: 3, Pages: 1197-1223
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Abstract

It is well known that power control error PCE is a critical issue in CDMA cellular systems In this paper the bit error rate BER of a direct sequencecode division multiple access DSCDMA receiver with imperfect power control adaptive beamforming and voice activity is derived in frequencyselective Nakagami fading channels We discuss the effects of PCE Nakagamim fading parameter and channel’s multipath intensity profile as average signal strength and rate of average power decay and their effects on the BER performance of DSCDMA cellular systems In this paper the RAKE receiver consists of three stages In the first stage with conjugate gradient adaptive beamforming algorithm the desired users’ signal in an arbitrary path is passed and the interpath interference is canceled in other paths in each RAKE finger Also in this stage the multiple access interference MAI from other users is reduced Thus the matched filter MF can be used for the MAI reduction in each RAKE finger in the second stage In the third stage the output signals from the MFs are combined according to the conventional maximal ratio combining principle and then are fed into the decision circuit for the desired user How the Nakagami fading parameters power control imperfections or the number of resolvable paths affect the reverse link capacity of the system is discussed in detail Analytical and simulation results are also given for systems with different processing gains and number of BSs in the cellselection process with various Nakagami fading parameters

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