Method and apparatus for decoding a diphase-coded digital signal

Details Method and apparatus for decoding a diphase-coded digital signal Method and apparatus for decoding a diphase-coded digital signal

1994-11-18

1998-10-06

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

Angle modulation

375330, H04L 2722

Patent

active

058188789

ABSTRACT:
For decoding a diphase-coded signal the signal level is sampled with a sample signal of frequency equal to that of the bit clock pulse and each sample value is logically linked to the preceding sample value in accordance with an XOR function. This is preferably done by means of a microcontroller using interrupt routines for the sampling. The method is particularly advantageously applicable to transponder systems, for example contactless identification systems, the coding signal being modulated by the transponder onto a carrier signal; both the bit clock pulse and the sample signal of equal frequency thereto can be obtained by frequency division of the carrier signal.

REFERENCES:
patent: 4287596 (1981-09-01), Chari
patent: 4616314 (1986-10-01), Wilson et al.
patent: 4746898 (1988-05-01), Loeppert
patent: 4992790 (1991-02-01), Montgomery
patent: 5185766 (1993-02-01), Cho
patent: 5491713 (1996-02-01), Kwok et al.

Affiliated with

Also associated with

Rating

Method and apparatus for decoding a diphase-coded digital 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 decoding a diphase-coded digital signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for decoding a diphase-coded digital signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-87328