Communication system, transmitter, communication method, and transmitter detection method
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United States of America Patent
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Jun 5, 2012
Grant Date -
Jul 24, 2008
app pub date -
Oct 11, 2007
filing date -
Jan 19, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Disclosed is a communication system, having: a transmitter including: a first frequency converter converting a frequency of a provided signal to a first frequency band to generate a first signal and converting the frequency of the provided signal to a second frequency band to generate a second signal, the second frequency band having a given frequency difference against the first frequency band; and a combiner combining the first signal and the second signal to output a transmission signal, and a receiver including: a second frequency converter converting the transmission signal to a frequency-shifting signal shifted by the given frequency difference; a first multiplier multiplying the transmission signal and the frequency-shifting signal together to output a multiplied signal; a filter extracting a baseband signal from the multiplied signal; and a detector detecting significant information from the baseband signal.
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