FSK modulating and demodulating apparatus wherein each binary da

Details FSK modulating and demodulating apparatus wherein each binary da FSK modulating and demodulating apparatus wherein each binary da

1996-12-20

1998-08-04

Mis, David

Modulators

Frequency shift keying modulator or minimum shift keying...

332101, 329300, 329302, 329303, 375272, 375276, 375303, 375306, 375324, 375334, H03C 300, H03D 300, H04L 2712, H04L 2714

Patent

active

057899916

ABSTRACT:
A signal FSK-modulated with a binary data signal has first signal portions representing first logical level data contained in the binary data signal and second signal portions representing second logical level data contained in the binary data signal. Each of the first signal portions has a first frequency and lasts for a first time period and each of the second signal portions has a second frequency and lasts for a second time period. These first and second time periods are determined such that a number of cycles of the FSK-modulated signal appearing in each of the first time periods is equal to a number of cycles of the FSK-modulated signal appearing in each of the second time periods. For demodulation of the FSK-modulated signal, a time period corresponding to a predetermined number of successively appearing cycles of the modulated signal, among those appearing during the whole of each signal portion, is established, clock pulses from a clock pulse source are counted for the established time period, and the resulting count values are compared to determine whether received data is a first logical level data or second logical level data.

REFERENCES:
patent: 3614639 (1971-10-01), Belman
patent: 4021744 (1977-05-01), Montefusco
patent: 4547751 (1985-10-01), Nakata et al.

Affiliated with

Also associated with

Rating

FSK modulating and demodulating apparatus wherein each binary da does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with FSK modulating and demodulating apparatus wherein each binary da, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and FSK modulating and demodulating apparatus wherein each binary da will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1181704