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Distributed power allocation over indoor multi-pico stations

Journal of Beijing Institute of Technology 2015年第2期24卷 227-232页

作者：费泽松高强傅友 Tero Isotalo jarno niemela School of Information and Electronics Beijing Institute of Technology Department of Communication Engineering Tampere University of Technology

A low-complexity distributed power allocation algorithm is proposed to reduce the interference and improve the transmitting rate of edge users. Different scenarios are considered and user experience of indoor communication is promoted. The simulation results prove the effectiveness of our algorithm. The proposed power control scheme ensures that more users can achieve their required rate and the fairness of different users is improved. Besides, more than 5096 energy can be saved without loss in outage ability, and energy efficiency is also promoted. In addition, the proposed algorithm can be extended to scenarios that the required rates of pico stations can be changed periodically.

关键词： distributed power allocation indoor communication multi-pico stations

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Optimal power allocation for homogeneous and heterogeneous CA-MIMO systems

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Science China(Information Sciences) 2013年第2期56卷 177-190页

作者： CUI QiMei KANG PeiChuan HUANG XueQing VALKAMA Mikko niemela jarno Key Laboratory of Universal Wireless Communications Beijing University of Posts and Telecommunications Department of Communications Engineering Tampere University of Technology

Carrier aggregation (CA) technique has been adopted by 3GPP LTE-Advanced due to its ability of enhancing the spectrum efficiency and peak data rates through aggregating multiple component carriers (CCs). Two main factors make power control optimization very essential for CA-MIMO radio link: the different channel characteristics in multiple CCs, and multiple power constraint conditions (per-CC, per-antenna and pertransmitter power constraints) in the actual CA system deployment. This paper firstly derives the degenerate conditions of optimal power allocation for a single-transmitter CA-MIMO system. Stemming from the derived degenerate conditions, we propose a modified hybrid gradient optimal power allocation(MHGOPA) algorithm to maximize the system performance. Simulation results verify the validity of the proposed resource allocation approach by comparing with baseline average power allocation algorithm. Finally, we extend the MHGOPA algorithm into a heterogeneous CA network with multiple transmitters working simultaneously.

关键词： LTE-advanced carrier aggregation CA-MIMO heterogenous network modified hybrid gradient optimal power allocation

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