Practical Power Allocation for Cooperative Distributed Antenna Systems

Wei FENG  Yanmin WANG  Yunzhou LI  Shidong ZHOU  Jing WANG  

IEICE TRANSACTIONS on Communications   Vol.E93-B   No.9   pp.2424-2427
Publication Date: 2010/09/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.2424
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
distributed antenna system (DAS),  practical power allocation,  low SNR,  high SNR,  inter-cluster interference,  

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In this letter, we address the problem of downlink power allocation for the generalized distributed antenna system (DAS) with cooperative clusters. Considering practical applications, we assume that only the large-scale channel state information is available at the transmitter. The power allocation scheme is investigated with the target of ergodic achievable sum rate maximization. Based on some approximations and the Rayleigh Quotient Theory, the simple selective power allocation scheme is derived for the low SNR scenario and the high SNR scenario, respectively. The methods are applicable in practice due to their low complexity.