From mwatanabe@earthlink.net Tue Jun 13 08:30:42 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!mwatanabe From: mwatanabe@earthlink.net (Marta Watanabe) Newsgroups: comp.dsp Subject: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jun13.083042.9841@earthlink.net> Date: Tue, 13 Jun 1995 08:30:42 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Marta Watanabe *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From asilva@pipeline.com Wed Jun 14 03:24:42 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pipeline!asilva From: asilva@pipeline.com (Anja Silva) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jun14.032442.6003@pipeline.com> Date: Wed, 14 Jun 1995 03:24:42 GMT References: <1995Jun13.083042.9841@earthlink.net> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Jun13.083042.9841@earthlink.net>, mwatanabe@earthlink.net (Marta Watanabe) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. > A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Anja Silva *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From hsuzuki@titech.ac.jp Wed Jun 14 09:02:42 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!titech!hsuzuki From: hsuzuki@titech.ac.jp (Heather Suzuki) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jun14.090242.8953@titech.ac.jp> Date: Wed, 14 Jun 1995 09:02:42 GMT References: <1995Jun13.083042.9841@earthlink.net> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jun13.083042.9841@earthlink.net>, mwatanabe@earthlink.net (Marta Watanabe) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. -- Heather Suzuki Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre. ------------------------------------------------------------ From jrobertson@u-tokyo.ac.jp Thu Jun 15 00:14:42 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!u-tokyo!jrobertson From: jrobertson@u-tokyo.ac.jp (Jen Robertson) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jun15.001442.5268@u-tokyo.ac.jp> Date: Thu, 15 Jun 1995 00:14:42 GMT References: <1995Jun13.083042.9841@earthlink.net> <1995Jun14.090242.8953@titech.ac.jp> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jun14.090242.8953@titech.ac.jp>, hsuzuki@titech.ac.jp (Heather Suzuki) writes: > Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Jen Robertson Opinions expressed are solely my own and not those of University of Tokyo Department of Information Science. ------------------------------------------------------------ From alarsson@tum.de Sat Jun 17 03:00:42 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!tum!alarsson From: alarsson@tum.de (Astrid Larsson) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jun17.030042.7600@tum.de> Date: Sat, 17 Jun 1995 03:00:42 GMT References: <1995Jun13.083042.9841@earthlink.net> <1995Jun14.090242.8953@titech.ac.jp> <1995Jun15.001442.5268@u-tokyo.ac.jp> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jun15.001442.5268@u-tokyo.ac.jp>, jrobertson@u-tokyo.ac.jp (Jen Robertson) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. -- Astrid Larsson | alarsson@tum.de PGP Key fingerprint: F568 4C83 C105 3227 "Keep the channels open."