Performance analysis of a SAW based group demodulator for on-board processing communications satellites

Author

Loo, Chun

Author_Institution

Commun. Res. Centre, Ottawa, Ont., Canada

fYear

1991

fDate

2-5 Dec 1991

Firstpage

1351

Abstract

A description is presented of the chirp Fourier transforms which can be implemented with surface acoustic wave (SAW) devices. Two configurations, the multiply convolve multiply (MCM) and convolve multiply convolve (CMC), are treated. The derivations show that one gives the Fourier transform precisely, the other is an approximation, although a good one under most circumstances. Numerical results for the CMC are given. The results show that windowing is an effective means of reducing the sidelobe level of the output transform but at the expense of widening the main lobe

Keywords

Fourier analysis; demodulators; satellite relay systems; signal processing; surface acoustic wave devices; SAW devices; SAW group demodulator; approximation; chirp Fourier transforms; communications satellites; convolve multiply convolve; multiply convolve multiply; onboard processing; output transform; performance analysis; sidelobe reduction; surface acoustic wave; windowing; Chirp; Demodulation; Downlink; Equations; Fourier transforms; Frequency division multiaccess; Mobile communication; Performance analysis; Surface acoustic wave devices; Surface acoustic waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1991. GLOBECOM '91. 'Countdown to the New Millennium. Featuring a Mini-Theme on: Personal Communications Services

Conference_Location

Phoenix, AZ

Print_ISBN

0-87942-697-7

Type

conf

DOI

10.1109/GLOCOM.1991.188590

Filename

188590