Digital phase detector

Details Digital phase detector Digital phase detector

H - Electricity

03

D

329/11, 328/159,

H03D 1/00 (2006.01) G06F 1/035 (2006.01) H04L 27/233 (2006.01) H04L 27/18 (2006.01)

Patent

CA 1078030

ABSTRACT OF THE DISCLOSURE A digital phase detector which periodically detects the phase angle .theta.k of a carrier signal in which data are en- coded as phase changes. A coherent or differential phase- modulated carrier signal is split into its in-phase and quadrature phase components RoSin .theta.(t) and RoCos .theta.(t). Each signal component is sampled at a predetermined modulation interval and converted into a digital word having the form RoCos .theta.k and RoSin .theta.k. In one configuration, the two signal components are applied to a digital divider network which forms the quotient ? of the two digital words such that ¦?¦ ? 1. The quotient ? is applied to a data look-up ROM, programmed for Tan-1 operation, which forms a digital reference phase angle .PHI. limited to an angle ? 45°. Phase angle .PHI. is corrected by selection logic to form the desired phase angle .theta.k. Once .theta.k is known for each modulation interval, the encoded data may be readily extracted, since .theta.k represents the encoded data.

237942

Affiliated with

Also associated with

Rating

Digital phase detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital phase detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital phase detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-962573