Autocorrelating 2400 bps handshake sequence detector

Details Autocorrelating 2400 bps handshake sequence detector Autocorrelating 2400 bps handshake sequence detector

1988-04-01

1989-09-19

George, Keith E.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

375 9, 375121, H04M 1100

Patent

active

048688649

ABSTRACT:
An improved V.22 bis 2400 bits per second (bps) handshake sequence detector. An incoming phase keyed (PSK) handshake sequence is autocorrelated using a frequency shift keyed (FSK) receiver (101). The autocorrelated signal is then filtered by a low pass filter (106). The autocorrelated, low pass filtered signal is then alternately fed, at a 1200 Hz rate, to two detectors (114,116). Each of the detectors (114,116) looks for one half of the handshake sequence. The output of each detector (114,116) is provided to an OR-gate (122). The 2400 bps handshake sequence is declared to be detected when either one or both of the detectors (114,116) detects its corresponding portion of the sequence.

REFERENCES:
patent: 4280099 (1981-07-01), Rattlingourd
patent: 4400817 (1983-08-01), Sumner
patent: 4455661 (1984-06-01), Qureshi
patent: 4472818 (1984-04-01), Zapisek et al.
patent: 4488294 (1984-12-01), Christensen et al.
patent: 4538119 (1985-08-01), Ashida
patent: 4620294 (1986-10-01), Leung et al.
patent: 4680780 (1987-07-01), Agoston et al.
patent: 4700358 (1987-10-01), Duncanson et al.
patent: 4742482 (1988-05-01), Inskeep et al.
patent: 4808937 (1989-02-01), Correa et al.

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