Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1986-04-02
1989-05-23
Griffin, Robert L.
Pulse or digital communications
Spread spectrum
Direct sequence
375 8, 371 69, H04L 2300
Patent
active
048336963
ABSTRACT:
A modulator/demodulator operation mode control system specifies an operation mode, which is a combination of particular data transmission rate, multi-phase PSK modulation system, error-correction coding rate and others, in which a modulator/demodulator is to operate, while deciding the operation mode and controlling the modulator/demodulator. A transmit station designates a particular operation mode in a plurality of bits in terms of polarities of unique words, while a receive station switches a demodulator thereof to the designated operation mode responsive to an output of mode switchover signal decision means and based on signal representative of detection of the unique words.
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Chin Stephen
Griffin Robert L.
NEC Corporation
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