Coherent pseudonoise code tracking loop

Details Coherent pseudonoise code tracking loop Coherent pseudonoise code tracking loop

1987-10-16

1989-07-25

Cangialosi, Salvatore

Pulse or digital communications

Repeaters

Testing

H04K 102

Patent

active

048521213

ABSTRACT:
A coherent pseudonoise code (PN) tracking loop is provided with apparatus for sensing the absence of PN transition in the incoming data stream to the tracking loop and for switching OFF the data stream to prevent phase error distortion and inherent noise from entering the tracking loop which could be sensed as false or incorrect phase error signals. The apparatus includes a transition switch in the incoming data stream that is responsive to transition gate control logic coupled to the output of the PN replica generator in the tracking loop for switching OFF the incoming data stream when no PN transitions are occurring.

REFERENCES:
patent: 4017798 (1977-04-01), Gordy et al.
patent: 4163944 (1979-08-01), Chambers et al.
patent: 4538280 (1985-08-01), Mosley, Jr. et al.
patent: 4707839 (1987-11-01), Andren et al.

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