Interleaved OFDM Radar Signals for Simultaneous Polarimetric Measurements

Author

Wang, Zongbo ; Tigrek, Firat ; Krasnov, Oleg ; Van Der Zwan, Fred ; Van Genderen, Piet ; Yarovoy, Alexander

Author_Institution

Dalian Univ. of Technol., Dalian, China

Volume

48

Issue

3

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

2085

Lastpage

2099

Abstract

A novel pair of mutually-orthogonal radar waveforms is proposed for simultaneous polarimetric measurements (SPM). The proposed waveform pair exploits the orthogonality features between different subcarriers within a single orthogonal frequency division multiplexing (OFDM) chip, and is called interleaved OFDM (I-OFDM). With I-OFDM signals the isolation limitation defined by the bandwidth time (BT) product for frequently used waveform pairs like linear frequency modulated (LFM) and phase-code modulated (PCM) signals, can be overcome. The performance features of I-OFDM signals are theoretically analyzed; the application of I-OFDM signals and the corresponding signal processing scheme in SPM are presented. A significant increase of the polarimetric measurements efficiency by utilization of the proposed I-OFDM signals has been verified by experiments using an operational radar system.

Keywords

OFDM modulation; frequency modulation; phase coding; phase modulation; radar polarimetry; radar signal processing; BT product; I-OFDM signals; LFM; PCM signals; SPM; bandwidth time product; interleaved OFDM radar signals; linear frequency modulated; mutually-orthogonal radar waveforms; orthogonal frequency division multiplexing chip; phase-code modulated signals; signal processing scheme; simultaneous polarimetric measurements; Correlation; Estimation; OFDM; Radar measurements; Radar polarimetry; Signal resolution;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/TAES.2012.6237580

Filename

6237580