Design Of Saw Fir Filters For Quadrature Binary Modulation Systems

    Authors

    A. J. Vigil; D. C. Malocha;M. A. Belkerdid

    Comments

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    Abbreviated Journal Title

    IEEE Trans. Ultrason. Ferroelectr. Freq. Control

    Keywords

    Pulse; Acoustics; Engineering, Electrical & Electronic

    Abstract

    Full response signaling quadrature binary modulation (QBM) systems, which include QPSK, MSK, and SFSK, have applications in MODEM's, direct sequence spread spectrum, and microwave communications. Effective quadrature binary modulators are characterized by modulated signal waveforms with little intersymbol interference, good envelope uniformity, accurate spectral response, and good dynamic range. SAW filters are ideally suited for these systems since precise time-domain responses can be achieved. In addition, SAW filter designs can often compensate for system implementation distortion, such as spectral roll-off or matching. This yields near ideal time- and frequency-domain responses. Finally, it is relatively easy to implement any SAW FIR response for the required system. This paper presents several SAW FIR filter design techniques for full response signaling QBM systems. The design approaches for several standard modulator filters, such as QPSK and MSK, as well as several newly developed FIR modulator filters, will be compared. The design procedures, including zero extraction, are discussed. Experimental and theoretical results for five different SAW filter modulator designs are presented and show excellent time and frequency-domain correlation.

    Journal Title

    Ieee Transactions on Ultrasonics Ferroelectrics and Frequency Control

    Volume

    40

    Issue/Number

    5

    Publication Date

    1-1-1993

    Document Type

    Article

    Language

    English

    First Page

    504

    Last Page

    511

    WOS Identifier

    WOS:A1993MA44400010

    ISSN

    0885-3010

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