Energy efficient precoder design for MIMO-OFDM with rate-dependent circuit power

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...

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Bibliographic Details
Published in:2015 IEEE International Conference on Communications (ICC) pp. 1897 - 1902
Main Authors: Zijian Wang, Stupia, Ivan, Vandendorpe, Luc
Format: Conference Proceeding
Language:English
Published: IEEE 01.06.2015
Subjects:
Information rates
Linear programming
MIMO
Noise
OFDM
Power demand
Wireless communication
ISSN:1550-3607
Online Access:Get full text
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Summary: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.
ISSN:1550-3607
DOI:10.1109/ICC.2015.7248602