From skang@cern.ch Sat Jan 28 02:15:48 1995 Path: ashpoly!cascade!transat!ukc!fennimore!cern!skang From: skang@cern.ch (Sergei Kang) Newsgroups: comp.dsp Subject: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jan28.021548.8173@cern.ch> Date: Sat, 28 Jan 1995 02:15:48 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Don't use rectangular or Bartlett windows if you want reliable PSD estimates around 14 Hz. A Kaiser-Bessel window with parameter beta = 8.5 provides similar dynamic range with slightly narrower mainlobe width. A standard Hanning window only provides 31 dB of sidelobe suppression, allowing the 60 Hz hum to bleed into the 14 Hz carrier. MATLAB script available upon request via email. -- Sergei Kang *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From bnilsson@berkeley.edu Mon Jan 30 05:16:48 1995 Path: ashpoly!cascade!transat!ukc!fennimore!berkeley!bnilsson From: bnilsson@berkeley.edu (Bastien Nilsson) Newsgroups: comp.dsp Subject: Re: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jan30.051648.8350@berkeley.edu> Date: Mon, 30 Jan 1995 05:16:48 GMT References: <1995Jan28.021548.8173@cern.ch> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jan28.021548.8173@cern.ch>, skang@cern.ch (Sergei Kang) writes: > Don't use rectangular or Bartlett windows if you want reliable PSD estimates around 14 Hz. I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. -- Bastien Nilsson | bnilsson@berkeley.edu PGP Key fingerprint: AFB5 1B4B 5A20 08EE "Keep the channels open." From shughes@ox.ac.uk Wed Feb 01 01:41:48 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!ox!shughes From: shughes@ox.ac.uk (Sergei Hughes) Newsgroups: comp.dsp Subject: Re: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Feb01.014148.5113@ox.ac.uk> Date: Wed, 01 Feb 1995 01:41:48 GMT References: <1995Jan28.021548.8173@cern.ch> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan28.021548.8173@cern.ch>, skang@cern.ch (Sergei Kang) writes: > Don't use rectangular or Bartlett windows if you want reliable PSD estimates around 14 Hz. I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. -- Sergei Hughes *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0