From mhughes@pacbell.net Fri Apr 19 20:06:27 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pacbell!mhughes From: mhughes@pacbell.net (Mike Hughes) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr19.200627.6152@pacbell.net> Date: Fri, 19 Apr 1996 20:06:27 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 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. -- Mike Hughes "Row 14. No joke." Commodore Amiga 500 (1MB OCS) / AmigaOS 3.1 From msato@panix.com Sun Apr 21 01:35:27 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!panix!msato From: msato@panix.com (Mikhail Sato) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr21.013527.9188@panix.com> Date: Sun, 21 Apr 1996 01:35:27 GMT References: <1996Apr19.200627.6152@pacbell.net> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Apr19.200627.6152@pacbell.net>, mhughes@pacbell.net (Mike Hughes) writes: > 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). Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- === Mikhail Sato === Dept of Electrical Engineering, Public Access Unix of New York "Measuring a record you own is listening, not piracy." From jrodriguez@purdue.edu Tue Apr 23 02:28:27 1996 Path: ashpoly!cascade!transat!ukc!fennimore!purdue!jrodriguez From: jrodriguez@purdue.edu (Joachim Rodríguez) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996Apr23.022827.1842@purdue.edu> Date: Tue, 23 Apr 1996 02:28:27 GMT References: <1996Apr19.200627.6152@pacbell.net> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Apr19.200627.6152@pacbell.net>, mhughes@pacbell.net (Mike Hughes) 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. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Joachim Rodríguez Tape trading list upon request. SASE required for international mail.