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http://dx.doi.org/10.7840/kics.2012.37A.10.865

Antenna Placement Designs for Distributed Antenna Systems with Multiple-Antenna Ports  

Lee, Changhee (고려대학교 전기전자전파공학부 무선통신 연구실)
Park, Eunsung (고려대학교 전기전자전파공학부 무선통신 연구실)
Lee, Inkyu (고려대학교 전기전자전파공학부 무선통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37A, no.10, 2012 , pp. 865-875 More about this Journal
Abstract
In this paper, we optimize antenna locations for a distributed antenna system (DAS) with distributed antenna (DA) ports equipped with multiple antennas under per-DA port power constraint. Maximum ratio transmission and scaled zero-forcing beamforming are employed for single-user and multi-user DAS, respectively. Instead of maximizing the cell average ergodic sum rate, we focus on a lower bound of the expected signal-to-noise ratio (SNR) for the single-cell scenario and the expected signal-to-leakage ratio (SLR) for the two-cell scenario to determine antenna locations. For the single-cell case, optimization of the SNR criterion generates a closed form solution in comparison to conventional iterative algorithms. Also, a gradient ascent algorithm is proposed to solve the SLR criterion for the two-cell scenario. Simulation results show that DAS with antenna locations obtained from the proposed algorithms achieve capacity gains over traditional centralized antenna systems.
Keywords
multiple-antenna port; distributed antenna systems (DAS); distributed antenna (DA); antenna location; antenna placement;
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