From rtanaka@mindspring.com Fri Jan 07 21:38:53 1994
Path: ashpoly!cascade!brgate!saturno!mindspring!rtanaka
From: rtanaka@mindspring.com (Renata Tanaka)
Newsgroups: comp.dsp
Subject: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994Jan07.213853.8963@mindspring.com>
Date: Fri, 07 Jan 1994 21:38:53 GMT
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Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.

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.

-- 
Renata Tanaka | rtanaka@mindspring.com
PGP Key fingerprint: 3735 19FB ADC8 B145
"Keep the channels open."

From klindqvist@inria.fr Sat Jan 08 14:24:53 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!klindqvist
From: klindqvist@inria.fr (Kenji Lindqvist)
Newsgroups: comp.dsp
Subject: Re: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994Jan08.142453.6757@inria.fr>
Date: Sat, 08 Jan 1994 14:24:53 GMT
References: <1994Jan07.213853.8963@mindspring.com>
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In article <1994Jan07.213853.8963@mindspring.com>, rtanaka@mindspring.com (Renata Tanaka) writes:
> Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.
> A Kaiser-Bessel window with parameter beta = 8.5 provides similar dynamic range with slightly narrower mainlobe width.

Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz.

Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs.

-- 
Kenji Lindqvist | klindqvist@inria.fr
PGP Key fingerprint: 9F21 D112 1586 0998
"Keep the channels open."