From mkowalski@panix.com Mon Jun 20 16:26:58 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!panix!mkowalski From: mkowalski@panix.com (Morag Kowalski) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jun20.162658.2744@panix.com> Date: Mon, 20 Jun 1994 16:26:58 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com 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. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). 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. -- Morag Kowalski *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From kweber@stanford.edu Tue Jun 21 21:01:58 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!stanford!kweber From: kweber@stanford.edu (Katrin Weber) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jun21.210158.2465@stanford.edu> Date: Tue, 21 Jun 1994 21:01:58 GMT References: <1994Jun20.162658.2744@panix.com> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Jun20.162658.2744@panix.com>, mkowalski@panix.com (Morag Kowalski) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. The Golay code confirms Marcus Hale's military background. The Voyager spacecraft and NATO satcom systems use the exact same code. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Katrin Weber Tape trading list upon request. SASE required for international mail.