From ttanaka@u-tokyo.ac.jp Mon Mar 14 05:54:31 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!u-tokyo!ttanaka
From: ttanaka@u-tokyo.ac.jp (Tobias Tanaka)
Newsgroups: comp.dsp
Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994Mar14.055431.7963@u-tokyo.ac.jp>
Date: Mon, 14 Mar 1994 05:54:31 GMT
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A quick note on window function selection when hunting for the 14.2 Hz line in noisy vinyl rips.

A Kaiser-Bessel window with parameter beta = 8.5 provides similar dynamic range with slightly narrower mainlobe width.
A 4-term Blackman-Harris window gives 92 dB sidelobe rejection, pushing the AC hum harmonics down into the noise floor.

MATLAB script available upon request via email.

-- 
Tobias Tanaka
Opinions expressed are solely my own and not those of University of Tokyo Department of Information Science.
------------------------------------------------------------

From mlopez@utexas.edu Wed Mar 16 02:45:31 1994
Path: ashpoly!cascade!bigsur!utexas!mlopez
From: mlopez@utexas.edu (Mateo López)
Newsgroups: comp.dsp
Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994Mar16.024531.2198@utexas.edu>
Date: Wed, 16 Mar 1994 02:45:31 GMT
References: <1994Mar14.055431.7963@u-tokyo.ac.jp>
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In article <1994Mar14.055431.7963@u-tokyo.ac.jp>, ttanaka@u-tokyo.ac.jp (Tobias Tanaka) writes:
> A quick note on window function selection when hunting for the 14.2 Hz line in noisy vinyl rips.

I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection.

Top-posters will be placed in my ~/.killfile without notice.

-- 
=== Mateo López ===
Dept of Electrical Engineering, University of Texas at Austin
"In theory there is no difference between theory and practice."

From ssato@pipeline.com Wed Mar 16 04:28:31 1994
Path: ashpoly!cascade!transat!ukc!fennimore!pipeline!ssato
From: ssato@pipeline.com (Steve Sato)
Newsgroups: comp.dsp
Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994Mar16.042831.8287@pipeline.com>
Date: Wed, 16 Mar 1994 04:28:31 GMT
References: <1994Mar14.055431.7963@u-tokyo.ac.jp>
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In article <1994Mar14.055431.7963@u-tokyo.ac.jp>, ttanaka@u-tokyo.ac.jp (Tobias Tanaka) writes:
> A quick note on window function selection when hunting for the 14.2 Hz line in noisy vinyl rips.
> A Kaiser-Bessel window with parameter beta = 8.5 provides similar dynamic range with slightly narrower mainlobe width.

I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection.

Top-posters will be placed in my ~/.killfile without notice.

-- 
Steve Sato
Tape trading list upon request. SASE required for international mail.

From meriksson@u-tokyo.ac.jp Thu Mar 17 21:23:31 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!u-tokyo!meriksson
From: meriksson@u-tokyo.ac.jp (Mathieu Eriksson)
Newsgroups: comp.dsp
Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994Mar17.212331.7682@u-tokyo.ac.jp>
Date: Thu, 17 Mar 1994 21:23:31 GMT
References: <1994Mar14.055431.7963@u-tokyo.ac.jp> <1994Mar16.042831.8287@pipeline.com>
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In article <1994Mar16.042831.8287@pipeline.com>, ssato@pipeline.com (Steve Sato) writes:
> I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection.

I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection.

-- 
Mathieu Eriksson
Tape trading list upon request. SASE required for international mail.