RESIDUAL ENERGY-AWARE COLLABORATIVE TRANSMISSION BEAMFORMING IN WIRELESS SENSOR NETWORKS

被引：0
|
作者：
Nsenga, J. [1 ]
Dawans, S. [1 ]
Ramon, V. [1 ]
Bourdoux, A. [2 ]
Horlin, F. [3 ]
机构：
[1] CETIC, 29-3 Rue Freres Wright, B-6041 Gosselies, Belgium
[2] IMEC, B-3001 Louvain, Belgium
[3] Univ Libre Bruxelles, B-1050 Brussels, Belgium
来源：
19TH EUROPEAN SIGNAL PROCESSING CONFERENCE (EUSIPCO-2011) | 2011年
关键词：
MIMO;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Energy Efficient transmission techniques arc very important for extending the lifetime of a wireless sensor network (WSN) given that recharging batteries of a large number of WSN nodes is a very difficult and expensive operation. Collaborative transmission beamforming (CTB) saves energy consumed by each node by distributing between different WSN nodes the required total power transmission to get a desired bit error rate (BER) at the receiver. Moreover, by coherently combining the different signals transmitted by the WSN nodes, CTB increases the signal strength in the direction of the receiver, therefore decreases the total power transmission of the WSN. In this paper, we propose a new CTB technique that minimizes the total power transmission of the WSN while balancing the residual energy in different nodes. By solving this multi-objective optimization problem, we show that the WSN lifetime can be improved up to 30 compared to the basic CTB algorithm, which aims at minimizing the total power transmission without taking into account the residual energy.
引用
收藏
页码：1180 / 1184
页数：5
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