Method and apparatus for detecting reception of a tone signal

Details Method and apparatus for detecting reception of a tone signal Method and apparatus for detecting reception of a tone signal

1994-07-05

1996-11-05

Zele, Krista M.

Telephonic communications

Supervisory or control line signaling

Signal receiver

379 58, 379 59, 379 63, 379283, H04M 1104

Patent

active

055725880

ABSTRACT:
Tone detection may be accomplished by receiving an in-phase signal component 203 and a quadrature signal component 204. These components are then sampled to produce a plurality of sampled in-phase signal components 207 and a plurality of sampled quadrature signal components 208. The sampled in-phase signal components 207, or the sampled quadrature signal components 208, are then shifted by a pre-determined phase angle to produce a plurality of shifted components. Having shifted these signals, the shifted signals, or at least a set of them, are compared with the opposite non-shifted sampled signals, or a set thereof. When each of the shifted signal components substantially match the opposite non-shifted signal components, a tone signal is being received.

REFERENCES:
patent: 5131019 (1992-07-01), Sheffer et al.
patent: 5134708 (1992-07-01), Marui et al.
patent: 5313170 (1994-05-01), Kojima

Affiliated with

Also associated with

Rating

Method and apparatus for detecting reception of a tone signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for detecting reception of a tone signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting reception of a tone signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2021344