Device for identifying a predetermined sequence of signals in a

Details Device for identifying a predetermined sequence of signals in a Device for identifying a predetermined sequence of signals in a

1995-09-12

1998-06-09

Chin, Wellington

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

327 47, 36471511, 370514, H03D 100, H04L 700, H04L 2706

Patent

active

057647089

ABSTRACT:
The invention relates to a device for identifying a predetermined sequence of signals arriving on a modem, the sequence having a frequency spectrum of two determined frequencies, the device including a notch filter, associated with a first magnitude calculator having an output sent on a first input of a comparator, a second input of the comparator receiving the output of a second magnitude calculator, the input of which directly receives the signals received by the modem.

REFERENCES:
patent: 4847880 (1989-07-01), Kamerman et al.
patent: 4849989 (1989-07-01), Kamerman
patent: 5127027 (1992-06-01), Takahashi
patent: 5208832 (1993-05-01), Greiss
patent: 5260974 (1993-11-01), Johnson et al.
patent: 5309476 (1994-05-01), Murray et al.
patent: 5337332 (1994-08-01), Yaguchi et al.

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