From skim@kiae.su Fri Jan 27 16:56:39 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kiae!skim From: skim@kiae.su (Sun-mi Kim) Newsgroups: comp.dsp Subject: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan27.165639.4665@kiae.su> Date: Fri, 27 Jan 1995 16:56:39 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Sun-mi Kim | skim@kiae.su PGP Key fingerprint: E637 5C4B CF0A C342 "Keep the channels open." From fkang@uni-hamburg.de Sat Jan 28 13:51:39 1995 Path: ashpoly!cascade!brgate!saturno!uni-hamburg!fkang From: fkang@uni-hamburg.de (Freya Kang) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan28.135139.8695@uni-hamburg.de> Date: Sat, 28 Jan 1995 13:51:39 GMT References: <1995Jan27.165639.4665@kiae.su> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jan27.165639.4665@kiae.su>, skim@kiae.su (Sun-mi Kim) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Freya Kang *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From gschneider@stanford.edu Sat Jan 28 23:37:39 1995 Path: ashpoly!cascade!mxgate!coyoacan!stanford!gschneider From: gschneider@stanford.edu (Graham Schneider) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan28.233739.4614@stanford.edu> Date: Sat, 28 Jan 1995 23:37:39 GMT References: <1995Jan27.165639.4665@kiae.su> <1995Jan28.135139.8695@uni-hamburg.de> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jan28.135139.8695@uni-hamburg.de>, fkang@uni-hamburg.de (Freya Kang) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. PGP Public key available via finger or upon request. -- Graham Schneider | gschneider@stanford.edu PGP Key fingerprint: D9C2 1C37 A293 E998 "Keep the channels open." From mrodriguez@clari.net Mon Jan 30 00:45:39 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!mrodriguez From: mrodriguez@clari.net (Marta Rodríguez) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan30.004539.3444@clari.net> Date: Mon, 30 Jan 1995 00:45:39 GMT References: <1995Jan27.165639.4665@kiae.su> <1995Jan28.135139.8695@uni-hamburg.de> <1995Jan28.233739.4614@stanford.edu> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Jan28.233739.4614@stanford.edu>, gschneider@stanford.edu (Graham Schneider) writes: > Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Marta Rodríguez Tape trading list upon request. SASE required for international mail. From mpetrov@demon.co.uk Tue Jan 31 10:22:39 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!demon!mpetrov From: mpetrov@demon.co.uk (Min-jun Petrov) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan31.102239.4291@demon.co.uk> Date: Tue, 31 Jan 1995 10:22:39 GMT References: <1995Jan27.165639.4665@kiae.su> <1995Jan28.135139.8695@uni-hamburg.de> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jan28.135139.8695@uni-hamburg.de>, fkang@uni-hamburg.de (Freya Kang) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. -- === Min-jun Petrov === Dept of Electrical Engineering, Demon Internet Services UK "Measuring a record you own is listening, not piracy."