A Novel Evaluation Method for the Downlink Capacity of Distributed Antenna Systems

Wei FENG  Yifei ZHAO  Ming ZHAO  Shidong ZHOU  Jing WANG  Minghua XIA  

IEICE TRANSACTIONS on Communications   Vol.E92-B   No.6   pp.2226-2230
Publication Date: 2009/06/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.2226
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
distributed antenna system (DAS),  downlink capacity,  random matrix theory,  iterative method,  

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This letter focuses on the simplified capacity evaluation for the downlink of a distributed antenna system (DAS) with random antenna layout. Based on system scale-up, we derive a good approximation of the downlink capacity by developing the results from random matrix theory. We also propose an iterative method to calculate the unknown parameters in the approximated expression of the downlink capacity. The approximation is illustrated to be quite accurate and the iterative method is shown to be quite efficient by Monte Carlo simulations.