Modulators, transmitters, a radio frequency identification device system and carrier signal suppression methods
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United States of America Patent
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app pub date -
Sep 20, 2001
filing date -
Apr 24, 1998
priority date (Note) -
Abandoned
status (Latency Note)
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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.
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