DocumentCode
3622605
Title
Interference avoidance with incremental power updates for uplink CDMA systems
Author
C. Lacatus;D.C. Popescu
Author_Institution
Dept. of Electr. Eng., Texas Univ., San Antonio, TX
Volume
4
fYear
2006
fDate
6/28/1905 12:00:00 AM
Firstpage
1842
Lastpage
1847
Abstract
The paper presents a distributed algorithm for joint codeword and power adaptation in the uplink of a code division multiple access (CDMA) system, in which users sequentially adjust codewords and powers using gradient-based updates to maximize their individual spectral efficiency subject to constraints on the signal-to-interference plus-noise ratios (SINR). Codeword adaptation is based on greedy interference avoidance which decreases the effective interference seen by users, and is followed by incremental power adaptation. The proposed algorithm is analyzed and illustrated with numerical examples obtained from simulations
Keywords
"Multiaccess communication","Signal to noise ratio","Power control","Signal design","Interference constraints","Base stations","Covariance matrix","Distributed algorithms","Algorithm design and analysis","Analytical models"
Publisher
ieee
Conference_Titel
Wireless Communications and Networking Conference, 2006. WCNC 2006. IEEE
ISSN
1525-3511
Print_ISBN
1-4244-0269-7
Type
conf
DOI
10.1109/WCNC.2006.1696576
Filename
1696576
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