DocumentCode :
802985
Title :
Performance evaluation of threshold-based power allocation algorithms for down-link switched-based parallel scheduling
Author :
Nam, Sung Sik ; Yang, Hong-Chuan ; Alouini, Mohamed-Slim ; Qaraqe, Khalid A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas A&M Univ. at Coll. Station, College Station, TX
Volume :
8
Issue :
4
fYear :
2009
fDate :
4/1/2009 12:00:00 AM
Firstpage :
1744
Lastpage :
1753
Abstract :
In this paper, we propose threshold-based power allocation algorithms for a recently proposed down-link parallel multiuser scheduling (SBS) scheme. The proposed algorithms re-allocate the extracted excess transmit power from some acceptable users to those unacceptable users among scheduled users. After the power allocation process, more unacceptable users will enjoy acceptable link reliability as the number of effective acceptable users with an acceptable receive SNR level among the scheduled users is increased without any additional down-link transmit power. Some selected numerical results, show that the proposed power allocation algorithms offer a certain improvement in average spectral efficiency (ASE) and an increase in the average number of effective acceptable users. Although the average bit error rate (BER) performance degrades, especially when the average SNR is close to the SNR threshold, this average BER performance still meets the average BER requirement.
Keywords :
diversity reception; error statistics; telecommunication network management; telecommunication network reliability; telecommunication switching; SNR threshold; average bit error rate; down-link parallel multiuser scheduling scheme; down-link switched-based parallel scheduling; link reliability; threshold-based power allocation algorithms; transmit power; Adaptive scheduling; Bit error rate; Degradation; Downlink; Multiaccess communication; Performance loss; Scheduling algorithm; Signal processing; Signal processing algorithms; Signal to noise ratio; Multiuser diversity; adaptive modulation; high-speed downlink packet access (HSDPA); opportunistic scheduling; power allocation; spectral efficiency;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2009.071026
Filename :
4907447
Link To Document :
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