Abstract:
Given the growing concern over energy consumption and associated global warming, green communication is becoming more and more important. Lots of efforts have been put in...Show MoreMetadata
Abstract:
Given the growing concern over energy consumption and associated global warming, green communication is becoming more and more important. Lots of efforts have been put into investigating energy efficiency based design in wireless systems. Unfortunately, the maximum energy efficiency of a point-to-point link is normally achieved when the transmit power approaches zero, which, however, is not desirable in practical systems due to the low achievable data rate. In this paper, we consider the energy efficiency optimization with a practical power consumption model, where, besides a maximum transmit power constraint, we set a rate constraint (r0) to guarantee an average throughput requirement (Rth). Due to the possible outage in transmission, r0 is in general different from Rth, and determining r0 for a given Rth is not trivial. We shall derive a closed-form solution for the optimal transmit power that maximizes energy efficiency. We will also demonstrate that a carefully selected rate constraint r0 can guarantee the required average throughput Rth and provide the freedom to achieve different tradeoffs between energy efficiency and average throughput.
Date of Conference: 01-04 April 2012
Date Added to IEEE Xplore: 11 June 2012
ISBN Information: