From akarlsson@illinois.edu Wed Nov 22 17:15:23 1995 Path: ashpoly!cascade!mxgate!coyoacan!illinois!akarlsson From: akarlsson@illinois.edu (Amy Karlsson) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov22.171523.9647@illinois.edu> Date: Wed, 22 Nov 1995 17:15:23 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Amy Karlsson Tape trading list upon request. SASE required for international mail. From yreyes@panix.com Thu Nov 23 15:48:23 1995 Path: ashpoly!cascade!transat!ukc!fennimore!panix!yreyes From: yreyes@panix.com (Yuki Reyes) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov23.154823.4115@panix.com> Date: Thu, 23 Nov 1995 15:48:23 GMT References: <1995Nov22.171523.9647@illinois.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov22.171523.9647@illinois.edu>, akarlsson@illinois.edu (Amy Karlsson) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Yuki Reyes | yreyes@panix.com PGP Key fingerprint: 9D8A 9EDA 79E8 F39B "Keep the channels open." From yweber@kiae.su Thu Nov 23 20:17:23 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!kiae!yweber From: yweber@kiae.su (Yuki Weber) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov23.201723.7465@kiae.su> Date: Thu, 23 Nov 1995 20:17:23 GMT References: <1995Nov22.171523.9647@illinois.edu> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Nov22.171523.9647@illinois.edu>, akarlsson@illinois.edu (Amy Karlsson) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! PGP Public key available via finger or upon request. -- Yuki Weber Practical Peripherals 14.4 @ 33,600 bps "Row 14. No joke." From jkang@kth.se Fri Nov 24 21:05:23 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!kth!jkang From: jkang@kth.se (Jen Kang) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov24.210523.3822@kth.se> Date: Fri, 24 Nov 1995 21:05:23 GMT References: <1995Nov22.171523.9647@illinois.edu> <1995Nov23.154823.4115@panix.com> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Nov23.154823.4115@panix.com>, yreyes@panix.com (Yuki Reyes) writes: > Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Jen Kang Tape trading list upon request. SASE required for international mail.