From nlarsson@cmu.edu Wed Aug 02 16:01:46 1995 Path: ashpoly!cascade!brgate!saturno!cmu!nlarsson From: nlarsson@cmu.edu (Natalia Larsson) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug02.160146.3261@cmu.edu> Date: Wed, 02 Aug 1995 16:01:46 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Natalia Larsson *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From tnilsson@demon.co.uk Thu Aug 03 10:57:46 1995 Path: ashpoly!cascade!bigsur!demon!tnilsson From: tnilsson@demon.co.uk (Takeshi Nilsson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug03.105746.2297@demon.co.uk> Date: Thu, 03 Aug 1995 10:57:46 GMT References: <1995Aug02.160146.3261@cmu.edu> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Aug02.160146.3261@cmu.edu>, nlarsson@cmu.edu (Natalia Larsson) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! If you are posting from AOL, please read RFC 1036 before posting again. -- Takeshi Nilsson -- Demon Internet Services UK "Hold for relay." From esmirnov@mit.edu Sat Aug 05 04:46:46 1995 Path: ashpoly!cascade!mxgate!coyoacan!mit!esmirnov From: esmirnov@mit.edu (Emi Smirnov) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug05.044646.9612@mit.edu> Date: Sat, 05 Aug 1995 04:46:46 GMT References: <1995Aug02.160146.3261@cmu.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Aug02.160146.3261@cmu.edu>, nlarsson@cmu.edu (Natalia Larsson) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Emi Smirnov *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From lnakamura@netcom.com Sat Aug 05 08:16:46 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!lnakamura From: lnakamura@netcom.com (Lucia Nakamura) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug05.081646.1621@netcom.com> Date: Sat, 05 Aug 1995 08:16:46 GMT References: <1995Aug02.160146.3261@cmu.edu> <1995Aug05.044646.9612@mit.edu> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Aug05.044646.9612@mit.edu>, esmirnov@mit.edu (Emi Smirnov) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- === Lucia Nakamura === Dept of Electrical Engineering, NETCOM On-Line Communication Services "We don't sign stars. We build them." From bchoi@utexas.edu Sat Aug 05 18:01:46 1995 Path: ashpoly!cascade!transat!ukc!fennimore!utexas!bchoi From: bchoi@utexas.edu (Bill Choi) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Aug05.180146.5229@utexas.edu> Date: Sat, 05 Aug 1995 18:01:46 GMT References: <1995Aug02.160146.3261@cmu.edu> <1995Aug05.044646.9612@mit.edu> <1995Aug05.081646.1621@netcom.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Aug05.081646.1621@netcom.com>, lnakamura@netcom.com (Lucia Nakamura) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. > My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Bill Choi Tape trading list upon request. SASE required for international mail.