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Texas Instruments Adaptive Filters With TMS320C25 or TMS320C30 ( Contains Scanned Text) Application notes
An Implementation of
Adaptive Filters with the
TMS320C25 or the
TMS320C30
APPLICATION REPORT: SPRA116
Sen Kuo
Northwestern Illinois University
Chein Chen
Digital Signal Processor Products
Semiconductor Group
Texas Instruments
Digital Signal Processing Solutions
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CONTACT INFORMATION
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An Implementation of Adaptive
Filters with the TMS320C25 or the
TMS320C30
Abstract
Adaptive filtering techniques are necessary considerations when a
specific signal output is desired but the coefficients of that filter
cannot be determined at the outset. Sometimes this is because of
changing line or transmission conditions. An adaptive filter is one
which contains coefficients that are updated by an adaptive
algorithm to optimize filter response to the desired performance
criterion.
Two devices, the TMS320C25 and TMS320C30, combine the
power, high speed, flexibility and architecture optimized for
adaptive signal processing.
This book discusses the topic of adaptive filter implementation as
they apply to these two processors.
The book begins with a description of the two parts of an adaptive
filter: the filter and the adaptive algorithm. The book goes on to
discuss:
q The applications of adaptive filters (including adaptive
prediction, equalization, noise cancellation and echo
cancellation).
q The implementation of adaptive structures and algorithms
(including transversal structure with the LMS algorithm,
symmetric transversal structure, lattice structure, and modified
LMS algorithms)
q Implementation considerations (including dynamic range
constraint, finite precision errors, and design issues)
SPRA116
q Software development (assembly function libraries, C function
libraries, development process and environment)
The book also contains:
q Tables showing transversal structure, symmetric transversal
structure and lattice structure for both the TMS320C25 and
TMS320C30 processors
q Extensive references
q Multiple appendices of sample code for both TMS320C25 and
TMS320C30 processors
6
An Implementation of Adaptive Filters with the TMS320C25 or the TMS320C30
SPRA116
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An Implementation of Adaptive Filters with the TMS320C25 or the TMS320C30
7
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