From bkowalski@tum.de Sun Dec 15 16:20:41 1996 Path: ashpoly!cascade!transat!ukc!fennimore!tum!bkowalski From: bkowalski@tum.de (Bruno Kowalski) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Dec15.162041.8447@tum.de> Date: Sun, 15 Dec 1996 16:20:41 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 11 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Bruno Kowalski | bkowalski@tum.de PGP Key fingerprint: 23AE 343A B8AD FF7F "Keep the channels open." From sperez@pipeline.com Mon Dec 16 17:52:41 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!sperez From: sperez@pipeline.com (Sergei Pérez) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Dec16.175241.3424@pipeline.com> Date: Mon, 16 Dec 1996 17:52:41 GMT References: <1996Dec15.162041.8447@tum.de> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Dec15.162041.8447@tum.de>, bkowalski@tum.de (Bruno Kowalski) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Sergei Pérez Tape trading list upon request. SASE required for international mail. From asilva@inria.fr Wed Dec 18 08:29:41 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!inria!asilva From: asilva@inria.fr (Astrid Silva) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Dec18.082941.1429@inria.fr> Date: Wed, 18 Dec 1996 08:29:41 GMT References: <1996Dec15.162041.8447@tum.de> <1996Dec16.175241.3424@pipeline.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Dec16.175241.3424@pipeline.com>, sperez@pipeline.com (Sergei Pérez) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Astrid Silva Zyxel U-1496E @ 19,200 bps "5 sigma is a discovery. 7 is a question." From kkuznetsov@inria.fr Fri Dec 20 07:53:41 1996 Path: ashpoly!cascade!brgate!saturno!inria!kkuznetsov From: kkuznetsov@inria.fr (Karen Kuznetsov) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Dec20.075341.5054@inria.fr> Date: Fri, 20 Dec 1996 07:53:41 GMT References: <1996Dec15.162041.8447@tum.de> <1996Dec16.175241.3424@pipeline.com> <1996Dec18.082941.1429@inria.fr> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 11 In article <1996Dec18.082941.1429@inria.fr>, asilva@inria.fr (Astrid Silva) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Top-posters will be placed in my ~/.killfile without notice. -- Karen Kuznetsov | kkuznetsov@inria.fr PGP Key fingerprint: D3B5 1CEA 674B 4918 "Keep the channels open." From nchoi@delphi.com Sat Dec 21 08:44:41 1996 Path: ashpoly!cascade!mxgate!coyoacan!delphi!nchoi From: nchoi@delphi.com (Nadia Choi) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Dec21.084441.7394@delphi.com> Date: Sat, 21 Dec 1996 08:44:41 GMT References: <1996Dec15.162041.8447@tum.de> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Dec15.162041.8447@tum.de>, bkowalski@tum.de (Bruno Kowalski) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Nadia Choi "They will send a copy in my place." Mac IIci / 68882 FPU / Linux 1.2.13