Coordinated Beamforming for MISO Interference Channel: Complexity Analysis and Efficient Algorithms
Coordinated Beamforming for MISO Interference Channel: Complexity Analysis and Efficient Algorithms
复制标题
MISO 干扰通道的协调波束形成:复杂性分析和高效算法
DOI:
10.1109/tsp.2010.2092772
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发表时间:
2011-03
影响因子:
5.4
通讯作者:
Luo, Zhi-Quan
中科院分区:
文献类型:
--
作者:
Liu, Ya-Feng;Dai, Yu-Hong;Luo, Zhi-Quan
In a cellular wireless system, users located at cell edges often suffer significant out-of-cell interference. Assuming each base station is equipped with multiple antennas, we can model this scenario as a multiple-input single-output (MISO) interference channel. In this paper we consider a coordinated beamforming approach whereby multiple base stations jointly optimize their downlink beamforming vectors in order to simultaneously improve the data rates of a given group of cell edge users. Assuming perfect channel knowledge, we formulate this problem as the maximization of a system utility (which balances user fairness and average user rates), subject to individual power constraints at each base station. We show that, for the single-carrier case and when the number of antennas at each base station is at least two, the optimal coordinated beamforming problem is NP-hard for both the harmonic mean utility and the proportional fairness utility. For general utilities, we propose a cyclic coordinate descent algorithm, which enables each transmitter to update its beamformer locally with limited information exchange and establish its global convergence to a stationary point. We illustrate its effectiveness in computer simulations by using the space matched beamformer as the benchmark.
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影响因子:
14.9
作者:
D. Schmidt;Changxin Shi;R. Berry;M. Honig;W. Utschick
通讯作者:
D. Schmidt;Changxin Shi;R. Berry;M. Honig;W. Utschick
DOI:
10.1109/ciss.2008.4558565
发表时间:
2008-03
期刊:
2008 42nd Annual Conference on Information Sciences and Systems
影响因子:
--
作者:
H. Dahrouj;Wei Yu
通讯作者:
H. Dahrouj;Wei Yu
DOI:
10.1109/jstsp.2007.914876
发表时间:
2008-02-01
影响因子:
7.5
作者:
Luo, Zhi-Quan (Tom);Zhang, Shuzhong
通讯作者:
Zhang, Shuzhong
DOI:
10.1201/b11043-9
发表时间:
2011-07
期刊:
--
影响因子:
--
作者:
G. Steel
通讯作者:
G. Steel
DOI:
10.1109/infcom.2009.5062050
发表时间:
2009-04
期刊:
IEEE INFOCOM 2009
影响因子:
--
作者:
C. Tan;M. Chiang;R. Srikant
通讯作者:
C. Tan;M. Chiang;R. Srikant