From treyes@hanse.de Wed Oct 04 18:56:11 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!hanse!treyes From: treyes@hanse.de (Tyler Reyes) Newsgroups: comp.dsp Subject: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct04.185611.1062@hanse.de> Date: Wed, 04 Oct 1995 18:56:11 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 10 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. 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. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Tyler Reyes Tape trading list upon request. SASE required for international mail. From dlarsson@u-tokyo.ac.jp Thu Oct 05 15:10:11 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!u-tokyo!dlarsson From: dlarsson@u-tokyo.ac.jp (Diego Larsson) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Oct05.151011.1231@u-tokyo.ac.jp> Date: Thu, 05 Oct 1995 15:10:11 GMT References: <1995Oct04.185611.1062@hanse.de> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Oct04.185611.1062@hanse.de>, treyes@hanse.de (Tyler Reyes) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Diego Larsson US Robotics Courier V.34 @ ISDN 64k bps "A soul is not exclusive to biology."