Talk slides at 2010 AMSAT Space Symposium - Phil Karn, KA9Q

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HDLC Frame Format

AMSAT Orbit issue 18, March-April 1984 - Phil Karn, KA9Q

BPSK1000 Encoding Data frames in HDLC encoder FEC encode, r=1/2 k=7 128:1 Convolutional interleaver Differential encode BPSK modulator RF out CRC-32 Ye olde Voyager code Bit-reversed delay ordering 1 → no change 0 → 180° change

HDLC Frame Format

Page 1 and 2: The BPSK1000 Format for ARISSat-1 P
Page 4 and 5: ARISSat Requirements No special rec
Page 8 and 9: HDLC with CRC-32 ● HDLC with 16-b
Page 10 and 11: Convolutional encoder
Page 12 and 13: Convolutional Interleaver 4 Sample
Page 14 and 15: Bit-reversed ordering ● The delay
Page 16: Demodulating DBPSK ● No carrier p
Page 19 and 20: Nonfading channel performance Diffe
Page 21 and 22: AO40/ARISSat comparison AO40FEC ARI

Talk slides at 2010 AMSAT Space Symposium - Phil Karn, KA9Q

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