Communication system using length shift keying modulation
First Claim
1. A communication system using a length shift keying (LSK) modulation method, the communication system comprising a transmitter that adjusts lengths of carrier signals for transmitting data in a time domain according to combinations of data bits, and generating a communication signal including the carrier signals having the adjusted lengths.
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Accused Products
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.
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Citations
18 Claims
- 1. A communication system using a length shift keying (LSK) modulation method, the communication system comprising a transmitter that adjusts lengths of carrier signals for transmitting data in a time domain according to combinations of data bits, and generating a communication signal including the carrier signals having the adjusted lengths.
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15. A communication system using a length shift keying (LSK) modulation method, the communication system comprising:
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a transmitter that includes a carrier signal generator that generates carrier signals, and a modulator that modulates lengths of the carrier signals generated by the carrier signal generator according to combinations of data bits and outputs the modulated carrier signals; and
a receiver that includes an integrator that calculates an energy value by integrating a carrier signal that corresponds to a data bit combination, and a data judgment unit that judges the data bit combination by comparing the energy value with a predetermined threshold value.
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16. A communication system using a length shift keying (LSK) modulation method, the communication system comprising:
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means for generating carrier signals;
means for modulating lengths of the carrier signals according to combinations of data bits;
means for outputting a communication signal including the modulated carrier signals; and
means for receiving the output communications signal, the means for receiving comprising;
means for calculating an energy value by integrating the carrier signal corresponding to a data bit combination; and
means for judging the data bit combination by comparing the energy value with a predetermined threshold value.
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17. A length shift keying (LSK) modulation method comprising:
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generating carrier signals;
modulating lengths of the carrier signals according to combinations of data bits; and
outputting a communication signal including the modulated carrier signals. - View Dependent Claims (18)
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Specification