Power Optimized PA Clipping for MIMO-OFDM Systems

Author

Hun Seok Kim ; Daneshrad, B.

Author_Institution

Applic. & Syst. R&D Center, Texas Instrum. Inc., Dallas, TX, USA

Volume

10

Issue

9

fYear

2011

fDate

9/1/2011 12:00:00 AM

Firstpage

2823

Lastpage

2828

Abstract

For a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system that is being pushed into power amplifier (PA) saturation, this letter investigates power-optimized PA clipping. Our goal is to identify the optimum clipping level for a MIMO-OFDM system that delivers the desired bit error rate (BER) with minimum power consumption in the PA. We present a complete theoretical framework resulting in an analytical expression for the BER of a MIMO-OFDM system subject to PA clipping. PA power saving is addressed by the total degradation metric, which shows that as much as 6dB power reduction can be achieved by proper choice of the clipping level.

Keywords

MIMO communication; OFDM modulation; error statistics; power amplifiers; MIMO-OFDM system; PA power saving; PA saturation; bit error rate; multiple-input multiple-output system; optimum clipping level; orthogonal frequency division multiplexing; power amplifier; power consumption; power reduction; power-optimized PA clipping; total degradation metric; Bit error rate; Degradation; Detectors; MIMO; Peak to average power ratio; Signal to noise ratio; MIMO; OFDM; PA clipping; peak to average power ratio; total degradation;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2011.072011.101834

Filename

5963797