Increasing measurement speed in mm-wave imaging systems by means of frequency multiplexing

Author

Koeppel, Tobias ; Methfessel, Sebastian ; Schiessl, A. ; Schmidt, Lorenz-Peter

Author_Institution

Inst. of Microwaves & Photonics, Univ. Erlangen-Nuremberg, Erlangen, Germany

fYear

2013

fDate

9-11 Oct. 2013

Firstpage

315

Lastpage

318

Abstract

Target movement during illumination causes reliability issues in imaging systems, particularly in applications where time efficiency is needed. A technique is proposed in order to reduce measurement time and as a consequence also motion blur effects. With the use of OFDM waveforms, a decrease in measurement time by a factor of 1.6 is achieved with minimal hardware costs. Measurement time for increasing numbers of carriers is predicted. A hardware realization is investigated with respect to hardware imperfections. Influence of intermodulation distortion and phase noise on dynamic range is discussed. Afterwards, imaging results are presented.

Keywords

OFDM modulation; image motion analysis; intermodulation distortion; millimetre wave imaging; multiplexing; phase noise; OFDM waveforms; frequency multiplexing; intermodulation distortion; measurement speed; mm-wave imaging systems; motion blur effects; phase noise; target movement; Hardware; Imaging; OFDM; Phase noise; Receivers; Time measurement; Transmitters; microwave imaging; multistatic radar; signal processing; sparse array;

fLanguage

English

Publisher

ieee

Conference_Titel

Radar Conference (EuRAD), 2013 European

Conference_Location

Nuremberg

Type

conf

Filename

6689177