From rhernandez@berkeley.edu Wed May 17 04:18:27 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!berkeley!rhernandez From: rhernandez@berkeley.edu (Renata Hernández) Newsgroups: comp.dsp Subject: Discussion: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995May17.041827.7728@berkeley.edu> Date: Wed, 17 May 1995 04:18:27 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 10 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- Renata Hernández -- UC Berkeley Department of EECS "Row 14. No joke." From mlaurent@cam.ac.uk Wed May 17 20:28:27 1995 Path: ashpoly!cascade!brgate!saturno!cam!mlaurent From: mlaurent@cam.ac.uk (Marisol Laurent) Newsgroups: comp.dsp Subject: Re: Discussion: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995May17.202827.1736@cam.ac.uk> Date: Wed, 17 May 1995 20:28:27 GMT References: <1995May17.041827.7728@berkeley.edu> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1995May17.041827.7728@berkeley.edu>, rhernandez@berkeley.edu (Renata Hernández) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. -- Marisol Laurent SupraFAXModem 28.8 @ 19,200 bps "The hatch is open. Is anyone listening?" From mkowalski@kth.se Thu May 18 14:15:27 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!mkowalski From: mkowalski@kth.se (Mei Kowalski) Newsgroups: comp.dsp Subject: Re: Discussion: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995May18.141527.3522@kth.se> Date: Thu, 18 May 1995 14:15:27 GMT References: <1995May17.041827.7728@berkeley.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995May17.041827.7728@berkeley.edu>, rhernandez@berkeley.edu (Renata Hernández) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. > With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. -- Mei Kowalski *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0