Communication system using length shift keying modulation...

Details Communication system using length shift keying modulation... Communication system using length shift keying modulation...

2011-04-26

2011-04-26

Odom, Curtis B (Department: 2611)

Pulse or digital communications

Transceivers

Modems

C375S271000, C332S155000, C332S156000, C332S157000, C332S158000

Reexamination Certificate

active

07933320

ABSTRACT:
A communication system using a length shift keying (LSK) modulation method provides a transmitter having a carrier signal generator for generating carrier signals, and a modulator for modulating lengths of the carrier signals from the carrier signal generator according to combinations of data bits, and a receiver having an integrator for calculating an energy value by integrating the carrier signal that corresponds to a data bit combination, and a data judgment unit for judging the data bit combination by comparing the energy value with a predetermined threshold value. Power is maintained without changing the bandwidth of a communication signal when the communication signal is modulated.

REFERENCES:
patent: 4815106 (1989-03-01), Propp et al.
patent: 4975654 (1990-12-01), Becker et al.
patent: 5455570 (1995-10-01), Cook et al.
patent: 2006/0023797 (2006-02-01), Machimura et al.

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