Pulse or digital communications – Repeaters – Testing
Patent
1983-10-19
1986-12-02
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
329107, 307234, H03K 704
Patent
active
046270752
ABSTRACT:
Pulse position coding is used to transmit several channels of data from a ground radar transmitter to a receiver in an airborne, remotely-piloted vehicle. The system is designed to ignore interfering pulses, especially those which are synchronized with the transmitter's PRF, by combining a number of noise reduction devices. These include the redundant transmission of address and channel information, the transmission of true and complemented data, the tracking of channels transmitted in a predetermined order, developing an interference count to recognize synchronous pulses, comparing data received for a given channel with data subsequently received for that channel, the use of windows around the expected positions of pulses, and the use of parity. There is also a novel programming arrangement which enables several programs to be stored in a reduced amount of memory space.
REFERENCES:
patent: 4020477 (1977-04-01), Holland
patent: 4070550 (1978-01-01), Miller, Jr. et al.
patent: 4083007 (1978-04-01), Levine
patent: 4088831 (1978-05-01), Butcher et al.
patent: 4242664 (1980-12-01), Lindstedt et al.
Fleming, III Robert F.
Irby Raymond F.
Chin Stephen
Griffin Robert L.
Vega Precision Laboratories, Inc.
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