The investigation of new adaptive filtering algorithms for telecommunications echo cancellation implemented in TMS32010 fixed point assembly code

Michael N. Kloos, William Kenneth Jenkins

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Scopus citations

    Abstract

    Current state-of-the art echo cancellers for telecommunications typically employ the least mean square (LMS) adaptive algorithm developed in the late 1950's and early 1960's. The canceller is usually implemented as a nonrecursive, or finite impulse response (FIR), filter structure. More recently, interest has grown in recursive, or infinite impulse response (IIR), adaptive filter structures for the echo cancellation application. Floating-point computer simulations have shown that adaptive IIR filters require less computation to match certain transfer relations than do adaptive FIR filters. However, it is a practical question as to how well these algorithms perform when implemented in a fixed-point environment, which is typically the case in practical situations. This paper examines the performance of several IIR adaptive filtering algorithms as implemented on a Texas Instruments TMS32010 digital signal processor for echo cancellation in telecommunication environments.

    Original languageEnglish (US)
    Title of host publicationMidwest Symposium on Circuits and Systems
    PublisherPubl by IEEE
    Pages1034-1037
    Number of pages4
    ISBN (Print)0780300815
    StatePublished - Dec 1 1991
    Event33rd Midwest Symposium on Circuits and Systems - Calgary, Alberta, Can
    Duration: Aug 12 1990Aug 15 1990

    Publication series

    NameMidwest Symposium on Circuits and Systems
    Volume2

    Other

    Other33rd Midwest Symposium on Circuits and Systems
    CityCalgary, Alberta, Can
    Period8/12/908/15/90

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Electrical and Electronic Engineering

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  • Cite this

    Kloos, M. N., & Jenkins, W. K. (1991). The investigation of new adaptive filtering algorithms for telecommunications echo cancellation implemented in TMS32010 fixed point assembly code. In Midwest Symposium on Circuits and Systems (pp. 1034-1037). (Midwest Symposium on Circuits and Systems; Vol. 2). Publ by IEEE.