Browse > Article
http://dx.doi.org/10.5573/ieie.2014.51.5.029

Optimization of the Number of Active Antennas for Energy-Efficiency in the MIMO Broadcast Channel  

Choi, Seungkyu (Department of Electrical and Electronic Engineering, Yonsei University)
Kim, Dohoon (Korea Electronics Technology Institute)
Lee, Chungyong (Department of Electrical and Electronic Engineering, Yonsei University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.51, no.5, 2014 , pp. 29-34 More about this Journal
Abstract
We introduce a number of antenna optimization problem for the zero-forcing beamforming (ZFBF) scheme to enhance energy-efficiency (EE) of the multiple-input-multiple-output broadcast channel. For proposed optimization problem, we assume an instantaneous channel gain of the ZFBF scheme as an average channel gain, given by $N_a-K+1$, in order to reduce a computational complexity of finding the number of active antennas $N_a$. Then, we convert a fractional-form objective function into a subtractive-form, and find a solution of $N_a$ and the maximum EE by an iterative process. Simulation results show that the maximum EE value obtained by proposed algorithm is almost identical to the optimal EE value by the exhaustive search method.
Keywords
ZFBF;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Isheden, Christian; Chong, Zhijiat; Jorswieck, E.; Fettweis, Gerhard, "Framework for Link-Level Energy Efficiency Optimization with Informed Transmitter," IEEE Trans. Wireless Commun., vol.11, no.8, pp.2946-2957, Aug. 2012.
2 Li-Chun Wang; Rangapillai, S., "A survey on green 5G cellular networks," Signal Processing and Communications (SPCOM), 2012 International Conference on, vol., no., pp.1,5, 22-25 July 2012.
3 Rusek, F.; Persson, D.; Buon Kiong Lau; Larsson, E.G.; Marzetta, T.L.; Edfors, O.; Tufvesson, F., "Scaling Up MIMO: Opportunities and Challenges with Very Large Arrays," IEEE Sig. Processing Mag., vol.30, no.1, pp.40-60, Jan. 2013.
4 Hien Quoc Ngo; Larsson, E.G.; Marzetta, T.L., "Energy and Spectral Efficiency of Very Large Multiuser MIMO Systems," IEEE Trans. Commun., vol.61, no.4, pp.1436-1449, April 2013.   DOI   ScienceOn
5 Hoon Huh; Caire, G.; Papadopoulos, H.C.; Ramprashad, S.A., "Achieving "Massive MIMO" Spectral Efficiency with a Not-so-Large Number of Antennas," IEEE Trans. Wireless Commun., vol.11, no.9, pp.3226-3239, Sep. 2012.   DOI   ScienceOn
6 Jie Xu; Ling Qiu, "Energy Efficiency Optimization for MIMO Broadcast Channels," IEEE Trans. Wireless Commun., vol.12, no.2, pp.690-701, Feb. 2013.   DOI   ScienceOn
7 Ng, D.W.K.; Lo, E.S.; Schober, R., "Energy-Efficient Resource Allocation in OFDMA Systems with Large Numbers of Base Station Antennas," IEEE Trans. Wireless Commun., vol.11, no.9, pp.3292-3304, Sep. 2012.   DOI   ScienceOn
8 Hongseok Kim; Chan-Byoung Chae; de Veciana, G.; Heath, R.W., "A cross-layer approach to energy efficiency for adaptive MIMO systems exploiting spare capacity," IEEE Trans. Wireless Commun., vol.8, no.8 pp.4264-4275, Aug. 2009.   DOI   ScienceOn
9 Miao, Guowang, et al. "Cross-layer optimization for energy-efficient wireless communications: a survey." Wireless Commu.nications and Mobile Computing 9.4 (2009): 529-542.   DOI   ScienceOn
10 Taesang Yoo; Goldsmith, A., "On the optimality of multiantenna broadcast scheduling using zero-forcing beamforming," IEEE J. Sel. Areas Commun., vol.24, no.3, pp.528-541, Mar. 2006.   DOI   ScienceOn
11 Paulraj, Nabar, and Gore, Introduction to Space-Time Wireless Communication. NewYork: Cambridge University Press, 2003.