H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 27/00 (2006.01) H04L 1/06 (2006.01) H04L 27/02 (2006.01) H04L 27/32 (2006.01) H04L 27/38 (2006.01)
Patent
CA 2173530
A modulation and demodulation method for communication between a transmitting side and a receiving side includes a step of at the transmitting side, producing a modulating signal, an amplitude ratio of a current instantaneous amplitude of the modulating signal and an instantaneous amplitude at n symbols previously in time (n is a natural number) of the modulating signal being set to correspond to a code to be transmitted, a step of at the transmitting side, modulating a carrier with a radio frequency or an intermediate frequency by the modulating signal to provide and transmit a modulated signal, a step of at the receiving side, receiving the transmitted modulated signal to provide a received signal, and a step of at the receiving side, deciding the transmitted code from an amplitude ratio of an instantaneous amplitude of a signal point in a signal space and an instantaneous amplitude of the signal point in the signal space n symbols previously in time with respect to the received signal. A first amplitude ratio value equal to or smaller than 1 and a second amplitude ratio value equal to or greater than 1 are prepared. The amplitude ratio is selected one of the first and second amplitude values so as to prevent the modulating signal from converging to zero and from diverging.
Shirato Tadashi
Suzuki Yoshifumi
Cassan Maclean
Nippon Telegraph & Telephone Corporation
Nippon Telegraph And Telephone Corporation
LandOfFree
Modulation and demodulation method, modulator and demodulator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Modulation and demodulation method, modulator and demodulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modulation and demodulation method, modulator and demodulator will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-2053332