A theoretical treatment of PA power optimization in clipped MIMO-OFDM systems

Authors:
Hun Seok Kim;Babak Daneshrad
Affiliations:
University of California, Los Angeles, CA;University of California, Los Angeles, CA
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

Citing 5
Cited 0

An overview of peak-to-average power ratio reduction techniques for multicarrier transmission

IEEE Wireless Communications
Peak-to-mean power control in OFDM, Golay complementary sequences, and Reed-Muller codes

IEEE Transactions on Information Theory
On the existence and construction of good codes with low peak-to-average power ratios

IEEE Transactions on Information Theory
On maximum-likelihood detection and the search for the closest lattice point

IEEE Transactions on Information Theory
Power savings analysis of peak-to-average power ratio in OFDM

IEEE Transactions on Consumer Electronics

Quantified Score

Hi-index	0.00

Visualization

Abstract

This work presents a theoretical framework for determining the optimal clipping level for a multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) system. We start by modeling of the clipping noise, and propose a maximum likelihood (ML) receiver for the resulting signal. The bit error rate (BER) for this ML receiver is then derived for MIMO spatial multiplexing, space time coding, and cyclic delay diversity schemes. A search through the tradeoff space between the BER performance penalty and power amplifier (PA) power consumption advantage reveals optimum clipping levels of the system. Using an IEEE 802.11n like system, we show that the optimum clipping as predicted by this approach can improve PA power efficiency as much as 70%.