Second-order IMD cancellation receiver for wideband coherent SCM systems

Author

Gross, Richard ; Olshansky, Robert

Author_Institution

GTE Lab., Waltham, MA, USA

Volume

3

Issue

9

fYear

1991

Firstpage

847

Lastpage

849

Abstract

A novel receiver design for coherent subcarrier multiplexed (SCM) systems is demonstrated with a 20-channel digital video system in a multioctave configuration. System performance is enhanced by cancelling second-order intermodulation distortion and detecting both sidebands containing the microwave information. A multioctave 20-channel heterodyne SCM differential quadrature phase shift keying (DQPSK) experiment demonstrated the technique, achieving a receiver sensitivity of -40 dBm, which represents a 12 dB gain over the standard receiver design for this system configuration.<>

Keywords

intermodulation; multiplexing; optical links; optical modulation; phase shift keying; receivers; sensitivity; video signals; 20-channel digital video system; DQPSK; coherent subcarrier multiplexed; differential quadrature phase shift keying; intermodulation distortion cancellation; microwave information; multioctave configuration; receiver design; second-order intermodulation distortion; sensitivity; sidebands; wideband coherent SCM systems; Intermodulation distortion; Nonlinear optics; Optical distortion; Optical mixing; Optical receivers; Optical sensors; Phase modulation; Phase noise; Photoconductivity; Wideband;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.84514

Filename

84514