Improved radio over fiber performance using predistortion linearization

Author

Katz, A. ; Jemison, W. ; Kubak, M. ; Dragone, J.

Author_Institution

Coll. of New Jersey, Ewing, NJ, USA

Volume

2

fYear

2003

Firstpage

1403

Abstract

This paper describes improvements to Radio Over Fiber photonic links obtained by increasing the linearity of Mach Zehnder modulators using predistortion. The work was conducted at the Ku and X-band satellite uplink frequencies with a 1550 nm laser, but should be applicable to any microwave or even millimeter frequency band and any externally modulated laser. Link performance was evaluated for 2-tone intermodulation distortion, noise power ratio (NPR) and WCDMA adjacent channel power. Intermodulation distortion was reduced by more than 15 dB, and more than a 6 dB increase in effective signal power was demonstrated for typical system requirements.

Keywords

Mach-Zehnder interferometers; code division multiple access; intermodulation distortion; linearisation techniques; microwave links; microwave photonics; optical fibre communication; satellite links; 1550 nm; Ku-band; Mach-Zehnder modulator; WCDMA adjacent channel power; X-band; effective signal power; externally modulated laser; microwave link; noise power ratio; predistortion linearization; radio-over-fiber photonic link; satellite uplink; two-tone intermodulation distortion; Fiber lasers; Frequency; Intermodulation distortion; Laser noise; Linearity; Masers; Optical modulation; Predistortion; Satellite broadcasting; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2003 IEEE MTT-S International

Conference_Location

Philadelphia, PA, USA

ISSN

0149-645X

Print_ISBN

0-7803-7695-1

Type

conf

DOI

10.1109/MWSYM.2003.1212634

Filename

1212634