From khughes@clari.net Sun Apr 24 18:40:40 1994 Path: ashpoly!cascade!bigsur!clari!khughes From: khughes@clari.net (Katrin Hughes) Newsgroups: comp.dsp Subject: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1994Apr24.184040.4406@clari.net> Date: Sun, 24 Apr 1994 18:40:40 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 11 Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. Version 1.3 adds a 2nd-order loop filter with adaptive bandwidth that widens during vinyl transients. Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time. Grab the source archive from ftp.ashford-poly.edu:/pub/telecom-archives/stardust/stardust-1.3.tar.gz. -- Katrin Hughes US Robotics Courier V.34 @ 9600 Telebit bps "Hardware is temporary. The signal survives." From snovak@pacbell.net Mon Apr 25 05:50:40 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!pacbell!snovak From: snovak@pacbell.net (Sven Novak) Newsgroups: comp.dsp Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1994Apr25.055040.4366@pacbell.net> Date: Mon, 25 Apr 1994 05:50:40 GMT References: <1994Apr24.184040.4406@clari.net> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Apr24.184040.4406@clari.net>, khughes@clari.net (Katrin Hughes) writes: > Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. > Version 1.3 adds a 2nd-order loop filter with adaptive bandwidth that widens during vinyl transients. Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy. -- Sven Novak | snovak@pacbell.net PGP Key fingerprint: EF33 FB9A F118 5239 "Keep the channels open."