Saw Quadrature Binary Modulation System Applications
Abbreviated Journal Title
IEEE Trans. Ultrason. Ferroelectr. Freq. Control
Keywords
Pulse; Acoustics; Engineering, Electrical & Electronic
Abstract
SAW filters have been applied to finite impulse response (FIR) modulation systems such as quadrature phase shift keying (QPSK) and minimum shift key (MSK) because they offer precise time-domain symbol shaping which allows many different types of systems to be implemented with varying spectral confinement, time-domain envelope uniformity, and intersymbol interference. By using the combination of a digital message sequence, an impulse driver, and different SAW modulator filters, a SAW modulation system has been designed for experimental testing of a wide variety of quadrature binary modulation schemes. The RF test bed is characterized for system distortion, dynamic range, and spurious responses. 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. This paper presents results of the designed SAW quadrature binary modulation system. Excellent agreement between time- and frequency-domain measurements and theoretical predictions using the SAW modulation system are shown. In addition, the hardware test bed design is described and system optimization is discussed.
Journal Title
Ieee Transactions on Ultrasonics Ferroelectrics and Frequency Control
Volume
40
Issue/Number
5
Publication Date
1-1-1993
Document Type
Article
DOI Link
Language
English
First Page
496
Last Page
503
WOS Identifier
ISSN
0885-3010
Recommended Citation
"Saw Quadrature Binary Modulation System Applications" (1993). Faculty Bibliography 1990s. 943.
https://stars.library.ucf.edu/facultybib1990/943
Comments
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