Energy Efficient Precoder Design for MIMO-OFDM with Rate-dependent Circuit Power
Information Theory
2015-03-18 v1 math.IT
Abstract
This paper studies an energy efficient design of precoders for point-to-point multiple-input-multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems. Differently from traditional approaches, the optimal power allocation strategy is studied by modelling the circuit power as a rate-dependent function. We show that if the circuit power is a constant plus an increasing and convex function of the transmission rate, the problem of minimizing the consumed energy per bit received can be reformulated as a convex fractional program and solved by means of a bisection algorithm. The impact of the some system parameters is investigated either analytically or by means of computational results.
Cite
@article{arxiv.1503.05070,
title = {Energy Efficient Precoder Design for MIMO-OFDM with Rate-dependent Circuit Power},
author = {Zijian Wang and Ivan Stupia and Luc Vandendorpe},
journal= {arXiv preprint arXiv:1503.05070},
year = {2015}
}