Optical nulling of wideband microwave signals

Author

Schulz, P.A. ; Rispin, L.W. ; LeComte, W.L. ; Henion, S.R. ; Johnson, L.M. ; Roussell, H.V. ; Lummings, W.C.

Author_Institution

Lincoln Lab., MIT, Lexington, MA, USA

fYear

1993

fDate

15-18 Nov 1993

Firstpage

512

Lastpage

513

Abstract

Adaptive nulling is a technique to reduce the detection of unwanted interference by selecting specifically against some characteristic of the interference. In the case of an antenna with several subapertures or channels, spatial selection of the interference is implemented through appropriate complex weighting of the channels to make the net antenna sensitivity orders of magnitude smaller in the direction of the interference. This paper describes how optics has been used to achieve a wide-bandwidth (2 GHz) null centered at 6 GHz for the case of two channels. Such a 33% bandwidth null could not be achieved with microwave technology alone

Keywords

adaptive signal processing; interference suppression; optical information processing; 2 GHz; 6 GHz; adaptive ing; interference detection; optical ing; wideband microwave signals; Frequency; Interference; Microwave technology; Optical attenuators; Optical filters; Optical modulation; Optical sensors; Photodetectors; Signal analysis; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics Society Annual Meeting, 1993. LEOS '93 Conference Proceedings. IEEE

Conference_Location

San Jose, CA

Print_ISBN

0-7803-1263-5

Type

conf

DOI

10.1109/LEOS.1993.379286

Filename

379286