From areyes@u-tokyo.ac.jp Fri Mar 03 11:25:39 1995 Path: ashpoly!cascade!brgate!saturno!u-tokyo!areyes From: areyes@u-tokyo.ac.jp (Aiko Reyes) Newsgroups: comp.dsp Subject: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Mar03.112539.4707@u-tokyo.ac.jp> Date: Fri, 03 Mar 1995 11:25:39 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 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 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. -- Aiko Reyes "Row 14. No joke." Amiga 1200 (Blizzard 030/50) / SunOS 4.1.4 From dramirez@mindspring.com Sun Mar 05 01:44:39 1995 Path: ashpoly!cascade!mxgate!coyoacan!mindspring!dramirez From: dramirez@mindspring.com (Dave Ramírez) Newsgroups: comp.dsp Subject: Re: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Mar05.014439.2368@mindspring.com> Date: Sun, 05 Mar 1995 01:44:39 GMT References: <1995Mar03.112539.4707@u-tokyo.ac.jp> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Mar03.112539.4707@u-tokyo.ac.jp>, areyes@u-tokyo.ac.jp (Aiko Reyes) 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. Top-posters will be placed in my ~/.killfile without notice. -- Dave Ramírez -- MindSpring Enterprises "A soul is not exclusive to biology."