Receiver and method for synchronizing and detecting coded wavefo

Details Receiver and method for synchronizing and detecting coded wavefo Receiver and method for synchronizing and detecting coded wavefo

1976-11-24

1978-03-21

Griffin, Robert L.

325323, 328115, H04B 110

Patent

active

040805727

ABSTRACT:
A receiver and method for detecting a Manchester coded waveform is disclosed. The waveform is clocked to provide a number of digital samples of each positive and negative pulse. Each positive pulse is validated provided that a predetermined number (k) of the total samples (N) is more positive than a positive (+T) threshold level and a predetermined consecutive number (j) of the samples (N) are more positive than a negative (-T) threshold level. Each negative pulse is validated provided that (k) of (N) samples is more negative than the -T threshold level and (j) of (N) are more negative than the +T threshold level. Each data bit pulse synchronizes each succeeding data bit pulse by providing a predetermined time interval during which the midpoint of each pulse must change between a positive and negative waveform.

REFERENCES:
patent: 3633108 (1972-01-01), Kneuer
patent: 3678396 (1972-07-01), Hoffman
patent: 3736511 (1973-05-01), Gibson
patent: 3777268 (1975-12-01), Cleobury
patent: 3936740 (1976-02-01), Hogg
patent: 3991376 (1976-11-01), Stevens

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