SAW quadrature binary modulation system applications

Author

Vigil, A.J. ; Belkerdid, Madjid A. ; Malocha, Donald C.

Author_Institution

Comlinear Corp., Urbana, IL, USA

Volume

40

Issue

5

fYear

1993

Firstpage

496

Lastpage

503

Abstract

A surface acoustic wave (SAW) modulation system has been built, using a combination of a digital message sequence, an impulse driver, and different SAW modulator filters, for experimental testing of a wide variety of quadrature binary modulation schemes. The RF testbed is described and characterized for system distortion, dynamic range, and spurious responses, and system optimization is discussed. Nine different SAW modulator filters having different time- and frequency-domain responses were designed and fabricated for use in the system. Several of the designs are representative of new modulation schemes which offer better spectral confinement; and time-domain envelope uniformity than MSK. The results obtained with the designed SAW quadrature binary modulation system are presented. Excellent agreement between time- and frequency-domain measurements and theoretical predictions using the SAW modulation system are shown.<>

Keywords

frequency response; modulation; surface acoustic wave filters; test equipment; RF testbed; SAW modulation system; SAW modulator filters; digital message; dynamic range; frequency-domain responses; impulse driver; quadrature binary modulation system; spectral confinement; spurious responses; surface acoustic wave; system distortion; system optimization; time-domain envelope uniformity; Acoustic distortion; Acoustic testing; Acoustic waves; Digital filters; Digital modulation; Dynamic range; Impulse testing; Radio frequency; Surface acoustic waves; System testing;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.238101

Filename

238101