On Implementation and Design of Filter Banks for Subband Adaptive Systems
On Implementation and Design of Filter Banks for Subband Adaptive Systems
This paper introduces a polyphase implementation and design of an oversampled K-channel generalized DFT (GDFT) filter bank, which can be employed for subband adaptive filtering, and therefore is required to have a low aliasing level in the subband signals. A polyphase structure is derived which can be factorized into a real valued polyphase network and a GDFT modulation. For the latter, an FFT realization may be used, yielding a highly efficient polyphase implementation for arbitrary integer decimation ratios N <= K. We also present an analysis underlining the efficiency of complex valued subband processing. The design of the filter bank is completely based on the prototype filter and solved using a fast converging iterative least squares method, for which we give examples. The design specifications closely correspond with performance limits of subband adaptive filtering, which are under-pinned by simulation results.
0-7803-4997-0
172-181
Weiss, S
a1716781-351d-41d2-8d67-3e3d34f16476
Harteneck, M
9b15e378-31d8-4e37-8042-5e386a292a4a
Stewart, R W
c819965d-70b4-4689-8206-e6e444dcbf8e
October 1998
Weiss, S
a1716781-351d-41d2-8d67-3e3d34f16476
Harteneck, M
9b15e378-31d8-4e37-8042-5e386a292a4a
Stewart, R W
c819965d-70b4-4689-8206-e6e444dcbf8e
Weiss, S, Harteneck, M and Stewart, R W
(1998)
On Implementation and Design of Filter Banks for Subband Adaptive Systems.
1998 IEEE Workshop on Signal Processing Systems (SiPS): Design and Implementation.
.
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Abstract
This paper introduces a polyphase implementation and design of an oversampled K-channel generalized DFT (GDFT) filter bank, which can be employed for subband adaptive filtering, and therefore is required to have a low aliasing level in the subband signals. A polyphase structure is derived which can be factorized into a real valued polyphase network and a GDFT modulation. For the latter, an FFT realization may be used, yielding a highly efficient polyphase implementation for arbitrary integer decimation ratios N <= K. We also present an analysis underlining the efficiency of complex valued subband processing. The design of the filter bank is completely based on the prototype filter and solved using a fast converging iterative least squares method, for which we give examples. The design specifications closely correspond with performance limits of subband adaptive filtering, which are under-pinned by simulation results.
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Published date: October 1998
Additional Information:
Organisation: IEEE Address: Cambridge, Massachusetts, USA
Venue - Dates:
1998 IEEE Workshop on Signal Processing Systems (SiPS): Design and Implementation, 1998-10-01
Organisations:
Electronics & Computer Science
Identifiers
Local EPrints ID: 251918
URI: http://eprints.soton.ac.uk/id/eprint/251918
ISBN: 0-7803-4997-0
PURE UUID: 727057cb-4105-47a7-9b8e-8947d8e141da
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Date deposited: 08 Nov 2000
Last modified: 14 Mar 2024 05:14
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Contributors
Author:
S Weiss
Author:
M Harteneck
Author:
R W Stewart
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