Transpositional modulation
AssigneeTM IP Holdings, LLC
InventorsHarvey C. Woodsum, Richard C. Gerdes
Life of this patent
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Abstract
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for modulating and demodulating transpositional modulated (TM) signals. One aspect features a method of modulating a carrier signal that include the actions of generating a TM signal by generating a sinusoidal signal, and modulating the sinusoidal signal based on a data signal to provide the TM signal. Inserting the TM signal into a carrier signal to provide a TM modulated carrier signal. Modulating the TM modulated carrier signal with a non-TM signal to provide a combined signal. Transmitting the combined signal.
Claims20
A method of modulating a carrier signal, the method comprising:
- generating a transpositional modulation (TM) signal by:
- generating a sinusoidal signal;
- and
- modulating the sinusoidal signal based on a data signal to provide the TM signal;
- inserting the TM signal into a carrier signal to provide a TM modulated carrier signal;
- modulating the TM modulated carrier signal with a non-TM signal to provide a combined signal;
- and
- transmitting the combined signal.
A transmitter comprising:
- a transpositional modulation (TM) signal generator configured to:
- receive a first data signal, and
- generate a TM signal by modulating a sinusoidal signal based on the first data signal to provide the TM signal;
- a non-TM signal modulator configured to modulate a carrier signal with a non-TM signal based on a second data signal;
- and
- an internal carrier modulator coupled to the TM signal generator and to the non-TM signal modulator, the internal carrier modulator configured to receive the TM signal from the TM signal generator and insert the TM signal into the carrier signal.
A receiver comprising:
- a frame-averaged signal estimator configured to:
- receive a combined signal comprising a carrier signal modulated with both a transpositional modulation (TM) signal and a non-TM signal, and
- determine average values of the combined signal over respective symbol frames of the non-TM signal;
- a non-TM signal demodulator coupled to the frame-averaged signal estimator and configured to demodulate the non-TM signal based on the average values of the combined signal;
- a TM signal separator coupled to the frame averaged-signal estimator and configured to separate the TM signal from the non-TM signal of the combined signal;
- and
- a TM signal demodulator coupled to the TM signal separator and configured to demodulate the TM signal.
Dependencies are inferred from the claim text.