Transmitter-in-the-loop optimization of distorted OFDM radar emissions

Author

Jakabosky, John ; Ryan, Lane ; Blunt, Shannon

Author_Institution

Radar Syst. Lab., Univ. of Kansas, Lawrence, KS, USA

fYear

2013

fDate

April 29 2013-May 3 2013

Firstpage

1

Lastpage

5

Abstract

The inherent amplitude modulation of orthogonal frequency division multiplexing (OFDM) has limited its use in radar due to transmitter-induced distortion. Specifically, there is a necessary trade-off between reduced SNR caused by power back-off to accommodate these AM effects and the waveform distortion that occurs when driving the amplifier closer to saturation. Here a method is developed to design OFDM-based radar emissions with low range sidelobes in the presence of transmitter-induced distortion. This work builds upon previous results for hardware-in-the-loop optimization of continuous phase modulation (CPM) waveforms to demonstrate how saturated OFDM emissions may potentially provide a feasible alternative waveform design scheme.

Keywords

OFDM modulation; amplitude modulation; continuous phase modulation; radar applications; CPM waveforms; amplitude modulation; continuous phase modulation waveforms; distorted OFDM radar emissions; low range sidelobes; orthogonal frequency division multiplexing; power back-off; reduced SNR; transmitter-in-the-loop optimization; transmitter-induced distortion; waveform design scheme; waveform distortion; Delays; Optimization; Peak to average power ratio; Power amplifiers; Radar; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Radar Conference (RADAR), 2013 IEEE

Conference_Location

Ottawa, ON

ISSN

1097-5659

Print_ISBN

978-1-4673-5792-0

Type

conf

DOI

10.1109/RADAR.2013.6586121

Filename

6586121