From dramirez@mindspring.com Tue Jan 11 02:49:22 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!mindspring!dramirez From: dramirez@mindspring.com (Dong-hyun Ramírez) Newsgroups: comp.dsp Subject: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jan11.024922.4133@mindspring.com> Date: Tue, 11 Jan 1994 02:49:22 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. 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. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Dong-hyun Ramírez Zyxel U-1496E @ ISDN 64k bps "Hardware is temporary. The signal survives." From tgonzalez@pipeline.com Thu Jan 13 00:01:22 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!pipeline!tgonzalez From: tgonzalez@pipeline.com (Tobias González) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Jan13.000122.7755@pipeline.com> Date: Thu, 13 Jan 1994 00:01:22 GMT References: <1994Jan11.024922.4133@mindspring.com> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Jan11.024922.4133@mindspring.com>, dramirez@mindspring.com (Dong-hyun Ramírez) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Tobias González *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0