Optimal power allocation for energy efficiency maximization in distributed antenna systems

In this paper, we present a power allocation method for a distributed antenna system (DAS) to maximize energy efficiency (EE) which is defined as the ratio of the transmission rate to the total consumed power. Different from conventional EE maximization schemes which require iterative numerical meth...

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Bibliographic Details
Main Authors: Heejin Kim, Sang-Rim Lee, Changick Song, Inkyu Lee
Format: Conference Proceeding
Language:English
Subjects:
Antenna arrays
Closed-form solutions
Optimization
Ports (Computers)
Resource management
Wireless communication
Online Access:Request full text
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Description
Summary:In this paper, we present a power allocation method for a distributed antenna system (DAS) to maximize energy efficiency (EE) which is defined as the ratio of the transmission rate to the total consumed power. Different from conventional EE maximization schemes which require iterative numerical methods, we derive the optimal solution as closed form by solving Karush-Kuhn-Tucker conditions. The obtained closed form expression is applicable to DAS with an arbitrary number of distributed antenna (DA) ports and general per-DA port power constraints, and is also guaranteed to be globally optimum. Through Monte Carlo simulations, we show that the proposed power allocation method produces the optimal average EE identical to exhaustive search with significantly reduced computational complexity. In addition, we demonstrate that DAS is more beneficial in terms of EE compared to conventional antenna systems.
ISSN:1550-3607
1938-1883
DOI:10.1109/ICC.2013.6655516