From gkuznetsov@purdue.edu Sun May 21 18:54:12 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!purdue!gkuznetsov From: gkuznetsov@purdue.edu (Göran Kuznetsov) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995May21.185412.6224@purdue.edu> Date: Sun, 21 May 1995 18:54:12 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 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. 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. -- === Göran Kuznetsov === Dept of Electrical Engineering, Purdue University Engineering Computer Network "Extraordinary claims require extraordinary spectra." From gwatanabe@unam.mx Tue May 23 18:36:12 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!unam!gwatanabe From: gwatanabe@unam.mx (Graham Watanabe) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995May23.183612.7130@unam.mx> Date: Tue, 23 May 1995 18:36:12 GMT References: <1995May21.185412.6224@purdue.edu> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995May21.185412.6224@purdue.edu>, gkuznetsov@purdue.edu (Göran Kuznetsov) 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. -- Graham Watanabe "We don't sign stars. We build them." Sun SparcStation 20 / System 7.5.1