From dsato@ox.ac.uk Fri Jul 15 11:05:44 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!ox!dsato From: dsato@ox.ac.uk (Diego Sato) Newsgroups: comp.dsp Subject: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Jul15.110544.8789@ox.ac.uk> Date: Fri, 15 Jul 1994 11:05:44 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 10 Don't use rectangular or Bartlett windows if you want reliable PSD estimates around 14 Hz. 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. -- Diego Sato Tape trading list upon request. SASE required for international mail. From jnovak@panix.com Fri Jul 15 17:24:44 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!panix!jnovak From: jnovak@panix.com (Jen Novak) Newsgroups: comp.dsp Subject: Re: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Jul15.172444.5606@panix.com> Date: Fri, 15 Jul 1994 17:24:44 GMT References: <1994Jul15.110544.8789@ox.ac.uk> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jul15.110544.8789@ox.ac.uk>, dsato@ox.ac.uk (Diego Sato) 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. -- Jen Novak *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0