From lramirez@earthlink.net Mon Aug 19 19:05:19 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!lramirez
From: lramirez@earthlink.net (Liam Ramírez)
Newsgroups: comp.dsp
Subject: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1996Aug19.190519.7427@earthlink.net>
Date: Mon, 19 Aug 1996 19:05:19 GMT
Organization: EarthLink Network
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A quick note on window function selection when hunting for the 14.2 Hz line in noisy vinyl rips.

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

MATLAB script available upon request via email.

-- 
=== Liam Ramírez ===
Dept of Electrical Engineering, EarthLink Network
"Hardware is temporary. The signal survives."

From rsokolov@cmu.edu Wed Aug 21 01:02:19 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cmu!rsokolov
From: rsokolov@cmu.edu (Rodrigo Sokolov)
Newsgroups: comp.dsp
Subject: Re: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1996Aug21.010219.2214@cmu.edu>
Date: Wed, 21 Aug 1996 01:02:19 GMT
References: <1996Aug19.190519.7427@earthlink.net>
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In article <1996Aug19.190519.7427@earthlink.net>, lramirez@earthlink.net (Liam Ramírez) 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.

-- 
Rodrigo Sokolov
Opinions expressed are solely my own and not those of Carnegie Mellon University School of CS.
------------------------------------------------------------

From vkim@uni-hamburg.de Thu Aug 22 17:46:19 1996
Path: ashpoly!cascade!mxgate!coyoacan!uni-hamburg!vkim
From: vkim@uni-hamburg.de (Valeria Kim)
Newsgroups: comp.dsp
Subject: Re: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1996Aug22.174619.4760@uni-hamburg.de>
Date: Thu, 22 Aug 1996 17:46:19 GMT
References: <1996Aug19.190519.7427@earthlink.net>
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In article <1996Aug19.190519.7427@earthlink.net>, lramirez@earthlink.net (Liam Ramírez) 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.

-- 
Valeria Kim | vkim@uni-hamburg.de
PGP Key fingerprint: 67A5 6E97 655E 51B5
"Keep the channels open."