Energy Minimization of a QAM System

In this paper, an energy minimization problem for a quadrature amplitude modulation (QAM) system with automatic repeat request (ARQ) is considered. We formulate an optimization problem with constellation size and transmit power as the variables. We give an efficient and accurate geometric programmin...

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Bibliographic Details
Main Authors: Prabhu, R.S., Daneshrad, B., Vandenberghe, L.
Format: Conference Proceeding
Language:English
Subjects:
Automatic repeat request
AWGN
Bandwidth
Bit error rate
Power system modeling
Pulse amplifiers
Pulse modulation
Quadrature amplitude modulation
Throughput
Transmitters
Online Access:Request full text
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Description
Summary:In this paper, an energy minimization problem for a quadrature amplitude modulation (QAM) system with automatic repeat request (ARQ) is considered. We formulate an optimization problem with constellation size and transmit power as the variables. We give an efficient and accurate geometric programming (GP) approximation to the problem and illustrate the solution using a numerical example. We learn that the transmit power or equivalently bit error rate (BER) should be carefully chosen for minimal energy. Our analysis provides guidelines for setting the BER in an energy optimal way for various packet lengths.
ISSN:1525-3511
1558-2612
DOI:10.1109/WCNC.2007.140