Autocorrelating 2400 bps handshake sequence detector

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

G - Physics

06

F

354/231

G06F 13/42 (2006.01) H04L 27/00 (2006.01) H04L 27/08 (2006.01)

Patent

CA 1310426

AUTOCORRELATING 2400 BPS HANDSHAKE SEQUENCE DETECTOR 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.

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