System for reducing signal interference in modulated signal communication
First Claim
Patent Images
1. A system for reducing signal interference in modulated signal communication, comprising:
- a measurement processor for,measuring amplitudes of noise components of a received amplitude modulated signal prior to demodulation,identifying a frequency of a noise component having an amplitude larger than the amplitude of another noise component; and
a carrier frequency generator for generating a carrier frequency at a harmonic of said identified noise component for use in generating and demodulating said amplitude modulated signal; and
a demodulator for demodulating a received signal modulated at said noise component harmonic carrier frequency to provide a demodulated signal; and
a compensation processor for processing said demodulated signal and subtracting a DC component associated with said noise component from said processed demodulated signal.
2 Assignments
0 Petitions
Accused Products
Abstract
A system for reducing signal interference in modulated signal communication includes a measurement processor. The measurement processor measures amplitudes of noise components of a received amplitude modulated signal prior to demodulation. The measurement processor also identifies a frequency of a noise component having an amplitude larger than the amplitude of another noise component. A carrier frequency generator generates a carrier frequency substantially at a harmonic of the identified noise component. The carrier frequency is used to generate and demodulate the amplitude modulated signal.
-
Citations
12 Claims
-
1. A system for reducing signal interference in modulated signal communication, comprising:
-
a measurement processor for, measuring amplitudes of noise components of a received amplitude modulated signal prior to demodulation, identifying a frequency of a noise component having an amplitude larger than the amplitude of another noise component; and a carrier frequency generator for generating a carrier frequency at a harmonic of said identified noise component for use in generating and demodulating said amplitude modulated signal; and a demodulator for demodulating a received signal modulated at said noise component harmonic carrier frequency to provide a demodulated signal; and a compensation processor for processing said demodulated signal and subtracting a DC component associated with said noise component from said processed demodulated signal. - View Dependent Claims (2)
-
-
3. A system for reducing signal interference in modulated signal communication, comprising:
-
a measurement processor for, measuring amplitudes of noise components of a received amplitude modulated signal prior to demodulation, identifying a frequency of a noise component having an amplitude larger than the amplitude of another noise component; a carrier frequency generator for generating a carrier frequency at a harmonic of said identified noise component for use in generating and demodulating said amplitude modulated signal, wherein said measurement processor identifies multiple noise components of equal amplitude, said equal amplitude being larger than another noise component, and a decision processor for inhibiting said carrier frequency generator from generating a carrier frequency at said harmonic of said identified noise component, in response to said identification of multiple noise components of equal amplitude.
-
-
4. A system for reducing signal interference in modulated signal communication, comprising:
-
a measurement processor for, measuring amplitudes of noise components of a received amplitude modulated signal prior to demodulation, identifying a frequency of a noise component having an amplitude larger than the amplitude of another noise component; and a carrier frequency generator for generating a carrier frequency at a harmonic of said identified noise component for use in generating and demodulating said amplitude modulated signal;
wherein;a light emitting diode (LED); a photo-detector sensor for providing an output voltage signal in response to light generated by said LED; a modulator for modulating a carrier frequency at said noise component harmonic for transmission using said LED; and a demodulator for demodulating a signal modulated on said noise component harmonic carrier frequency received by said photo-detector sensor and transmitted using said LED, to provide a demodulated signal. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12)
-
Specification