NDLI: An efficient constant-Q spectrum analyzer architecture using polyphase filter bank

Content Provider	IEEE Xplore Digital Library
Author	Venosa, E. Xiaofei Chen Harris, F.
Copyright Year	2010
Description	Author affiliation: San Diego State University, USA (Xiaofei Chen; Harris, F.) \|\| Seconda Università degli Studi di Napoli, Italy (Venosa, E.)
Abstract	In this paper we present an extremely efficient constant-Q spectrum analyzer. By using half-band filtering and 2-to-1 down-sampling, the traditional analyzer successively shifts lower octaves to the same spectral interval so that the same post-processing can be applied to all of them. To decrease the total workload of such a structure a 4-path polyphase filter could be used to perform a 4-to-1 down-sampling before processing the octaves in the proportional bandwidth filter bank; this engine down-samples the current octave simultaneously translating it from quarter sample rate to base-band. In this paper we do much better! We propose a spectrum analyzer that uses only a 4-path polyphase channelizer along with a proportional bandwidth filter bank. The 4-path polyphase channelizer is used to perform 4-to-2 down-sampling. It is able to simultaneously shift lower octaves to the same spectral interval and translate the current octave to base-band allowing the proportional filter bank to work on a reduced sampling rate and decreasing the total workload of the system. To further reduce the workload recursive filters are used to implement the proportional bandwidth filters. A workload analysis along with a comparison between traditional and proposed constant-Q spectrum analyzer is also shown in this paper.
Starting Page	571
Ending Page	575
File Size	611587
Page Count	5
File Format	PDF
ISBN	9781424497225
ISSN	10586393
e-ISBN	9781424497218
DOI	10.1109/ACSSC.2010.5757625
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Filter banks Bandwidth Frequency domain analysis Converters Frequency response Resonator filters
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Networks and Communications

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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