H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/16
H04B 1/38 (2006.01) H04L 27/10 (2006.01)
Patent
CA 1307323
ABSTRACT OF THE DISCLOSURE A modem (18) and data communication system (10) particularly for operation in high frequency (HF) media. The modem (18) comprises an audio period timer (52) to detect cycles of data from a received signal, a bandwidth window (62) to flag undefined cycles UD so as to prevent such cycles UD from further influencing decoding decisions, a bit rate timer (57) to predict ends of bits of byte formed from a plurality of said cycles, a bit rate synchronisation means (76) to establish bit-wise synchronisation of the modem (18) with, the received signal, a byte synchronisation means to establish byte-wise synchronisation.
544811
Fetherstonhaugh & Co.
Transcom Communications Systems Ltd
LandOfFree
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