From tramirez@inria.fr Wed Jun 14 13:46:50 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!inria!tramirez From: tramirez@inria.fr (Tyler Ramírez) Newsgroups: comp.dsp Subject: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun14.134650.2123@inria.fr> Date: Wed, 14 Jun 1995 13:46:50 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr 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. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Tyler Ramírez SupraFAXModem 28.8 @ ISDN 64k bps "When every node is whole, the channel opens." From mnakamura@uni-hamburg.de Fri Jun 16 14:24:50 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!uni-hamburg!mnakamura From: mnakamura@uni-hamburg.de (Mathieu Nakamura) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun16.142450.5977@uni-hamburg.de> Date: Fri, 16 Jun 1995 14:24:50 GMT References: <1995Jun14.134650.2123@inria.fr> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Jun14.134650.2123@inria.fr>, tramirez@inria.fr (Tyler Ramírez) 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. -- Mathieu Nakamura -- Universität Hamburg Fachbereich Informatik "Hold for relay." From apetrov@cmu.edu Sat Jun 17 12:51:50 1995 Path: ashpoly!cascade!brgate!saturno!cmu!apetrov From: apetrov@cmu.edu (Astrid Petrov) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun17.125150.1457@cmu.edu> Date: Sat, 17 Jun 1995 12:51:50 GMT References: <1995Jun14.134650.2123@inria.fr> <1995Jun16.142450.5977@uni-hamburg.de> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Jun16.142450.5977@uni-hamburg.de>, mnakamura@uni-hamburg.de (Mathieu Nakamura) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! If you are posting from AOL, please read RFC 1036 before posting again. -- Astrid Petrov *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From hrodriguez@demon.co.uk Sun Jun 18 11:33:50 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!demon!hrodriguez From: hrodriguez@demon.co.uk (Hugo Rodríguez) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun18.113350.6625@demon.co.uk> Date: Sun, 18 Jun 1995 11:33:50 GMT References: <1995Jun14.134650.2123@inria.fr> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jun14.134650.2123@inria.fr>, tramirez@inria.fr (Tyler Ramírez) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Hugo Rodríguez | hrodriguez@demon.co.uk PGP Key fingerprint: B334 71D6 8589 9E58 "Keep the channels open." From bweber@hanse.de Mon Jun 19 20:57:50 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!hanse!bweber From: bweber@hanse.de (Brian Weber) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jun19.205750.6909@hanse.de> Date: Mon, 19 Jun 1995 20:57:50 GMT References: <1995Jun14.134650.2123@inria.fr> <1995Jun16.142450.5977@uni-hamburg.de> <1995Jun17.125150.1457@cmu.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Jun17.125150.1457@cmu.edu>, apetrov@cmu.edu (Astrid Petrov) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Brian Weber -- Hanse-Netzwerk Hamburg "We don't sign stars. We build them."