From ynovak@berkeley.edu Mon Jan 23 14:07:36 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!berkeley!ynovak From: ynovak@berkeley.edu (Yuki Novak) Newsgroups: comp.dsp Subject: Data: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jan23.140736.5200@berkeley.edu> Date: Mon, 23 Jan 1995 14:07:36 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files. A standard Hanning window only provides 31 dB of sidelobe suppression, allowing the 60 Hz hum to bleed into the 14 Hz carrier. 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. -- Yuki Novak "When every node is whole, the channel opens." PC-9821Ap2 (NEC) / NEXTSTEP 3.3 From amoreau@earthlink.net Wed Jan 25 17:16:36 1995 Path: ashpoly!cascade!mxgate!coyoacan!earthlink!amoreau From: amoreau@earthlink.net (Andrei Moreau) Newsgroups: comp.dsp Subject: Re: Data: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jan25.171636.1137@earthlink.net> Date: Wed, 25 Jan 1995 17:16:36 GMT References: <1995Jan23.140736.5200@berkeley.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan23.140736.5200@berkeley.edu>, ynovak@berkeley.edu (Yuki Novak) writes: > Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files. I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. -- === Andrei Moreau === Dept of Electrical Engineering, EarthLink Network "They will send a copy in my place." From plee@pacbell.net Fri Jan 27 18:00:36 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pacbell!plee From: plee@pacbell.net (Pavel Lee) Newsgroups: comp.dsp Subject: Re: Data: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jan27.180036.7492@pacbell.net> Date: Fri, 27 Jan 1995 18:00:36 GMT References: <1995Jan23.140736.5200@berkeley.edu> <1995Jan25.171636.1137@earthlink.net> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jan25.171636.1137@earthlink.net>, amoreau@earthlink.net (Andrei Moreau) writes: > I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. -- Pavel Lee *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0