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 Citation (Scopus)

    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

    Fingerprint

    Echo suppression
    Adaptive filtering
    Adaptive filters
    Telecommunication
    FIR filters
    Impulse response
    IIR filters
    Digital signal processors
    Adaptive algorithms
    Computer simulation

    All Science Journal Classification (ASJC) codes

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

    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.
    Kloos, Michael N. ; Jenkins, William Kenneth. / The investigation of new adaptive filtering algorithms for telecommunications echo cancellation implemented in TMS32010 fixed point assembly code. Midwest Symposium on Circuits and Systems. Publ by IEEE, 1991. pp. 1034-1037 (Midwest Symposium on Circuits and Systems).
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    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.",
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    Kloos, MN & Jenkins, WK 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. Midwest Symposium on Circuits and Systems, vol. 2, Publ by IEEE, pp. 1034-1037, 33rd Midwest Symposium on Circuits and Systems, Calgary, Alberta, Can, 8/12/90.

    The investigation of new adaptive filtering algorithms for telecommunications echo cancellation implemented in TMS32010 fixed point assembly code. / Kloos, Michael N.; Jenkins, William Kenneth.

    Midwest Symposium on Circuits and Systems. Publ by IEEE, 1991. p. 1034-1037 (Midwest Symposium on Circuits and Systems; Vol. 2).

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

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    AB - 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.

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    Kloos MN, Jenkins WK. 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. Publ by IEEE. 1991. p. 1034-1037. (Midwest Symposium on Circuits and Systems).