Backscatter interrogators, communication systems and backscatter communication methods
AssigneeMicron Technology, Inc.
InventorsDavid K. Ovard, Roy Greeff
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Abstract
The present invention provides backscatter interrogators, communication systems and backscatter communication methods. According to one aspect of the present invention, a backscatter interrogator includes a data path configured to communicate a data signal; a signal generator configured to generate a carrier signal; and a modulator coupled with the data path and the signal generator, the modulator being configured to spread the data signal to define a spread data signal and amplitude modulate the carrier signal using the spread data signal, the modulator being further configured to phase modulate the carrier signal.
Claims57
A backscatter interrogator comprising:
- a data path configured to communicate a data signal;
- a signal generator configured to generate a carrier signal;
- and
- a modulator coupled with the data path and the signal generator, the modulator being configured to spread the data signal to define a spread data signal and to both amplitude modulate and phase modulate the carrier signal using the spread data signal before communication of the carrier signal.
A backscatter interrogator comprising:
- a data path configured to communicate a data signal;
- a signal generator configured to output a microwave carrier signal;
- and
- a modulator coupled with the data path and the signal generator, the modulator being configured to spread the data signal to define a spread data signal and selectively invert the spread data signal, the modulator being further configured to band limit the inverted spread data signal and modulate the carrier signal using the band limited data signal.
A backscatter communication system comprising:
- an interrogator configured to spread a data signal to define a spread data signal, amplitude modulate a carrier signal using the spread data signal, phase modulate the carrier signal using the spread data signal, and output the amplitude modulated and phase modulated carrier signal;
- and
- an electronic communication device configured to output a backscatter reply signal responsive to reception of the amplitude modulated and phase modulated carrier signal.
A communication system comprising:
- an interrogator including:
- a data path configured to communicate a data signal;
- a signal generator configured to output a carrier signal;
- and
- a modulator configured to spread the data signal to define a spread data signal, filter the spread data signal to define a filtered data signal, amplitude modulate the carrier signal using the filtered data signal, phase modulate the carrier signal using the filtered data signal, and output the amplitude modulated and phase modulated carrier signal;
- and
- an electronic communication device configured to receive the amplitude modulated and phase modulated carrier signal and output a reply signal responsive to reception of the amplitude modulated and phase modulated carrier signal.
A backscatter communication method comprising:
- providing a data signal;
- providing a carrier signal;
- spreading the data signal to define a spread data signal;
- amplitude modulating the carrier signal using the spread data signal;
- phase modulating the carrier signal;
- and
- communicating the amplitude modulated and phase modulated carrier signal.
A method of communication in a backscatter system including an interrogator and a communication device comprising:
- providing a data signal;
- providing a carrier signal;
- spreading the data signal to define a spread data signal;
- modulating the carrier signal using the spread data signal to suppress the carrier signal during communication of the carrier signal;
- and
- communicating the modulated carrier signal.
A backscatter communication method comprising:
- providing a data signal;
- providing a carrier signal;
- spreading the data signal to define a spread data signal;
- selectively inverting the spread data signal;
- amplitude modulating the carrier signal using the data signal;
- and
- communicating the modulated carrier signal.
A backscatter communication method comprising:
- providing a data signal;
- providing a microwave carrier signal;
- providing a first code and a second code;
- spreading the data signal according to the first code to define a spread data signal;
- inverting the spread data signal according to the second code;
- band limiting the spread data signal;
- amplitude modulating the carrier signal using the band limited data signal;
- phase modulating the carrier signal using the band limited data signal;
- and
- communicating the amplitude modulated and phase modulated carrier signal.
A method of communication in a backscatter system including an interrogator and a communication device comprising:
- providing a data signal;
- providing a microwave carrier signal;
- and
- modulating the microwave carrier signal using a tri-level signal corresponding to the data signal.
Dependencies are inferred from the claim text.