다중 안테나 포트를 장착한 분산 안테나 시스템에서의 안테나 설계 방법Antenna Placement Designs for Distributed Antenna Systems with Multiple-Antenna Ports
- Other Titles
- Antenna Placement Designs for Distributed Antenna Systems with Multiple-Antenna Ports
- Authors
- 이창희; 박은성; 이인규
- Issue Date
- 2012
- Publisher
- 한국통신학회
- Keywords
- multiple-antenna port; distributed antenna systems (DAS); distributed antenna (DA); antenna location; antenna placement
- Citation
- 한국통신학회논문지, v.37, no.10, pp.865 - 875
- Indexed
- KCI
- Journal Title
- 한국통신학회논문지
- Volume
- 37
- Number
- 10
- Start Page
- 865
- End Page
- 875
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/109974
- ISSN
- 1226-4717
- 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.
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