Receiver for tire condition monitoring apparatus
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United States of America Patent
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-
Dec 27, 2011
Grant Date -
May 6, 2010
app pub date -
Mar 24, 2009
filing date -
Nov 6, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A receiver includes two reception antennas, which receive a modulated wave (transmission signal) from each of transmitters, a selection circuit, which alternately selects one of the two reception antennas at a predetermined switching cycle to alternately obtain the modulated wave from the two reception antennas, and a demodulation section, which generates a demodulated signal by demodulating the modulated wave obtained at the selection circuit. The switching cycle is 27 μs, which is 1/7.4 of the transmission time of data per symbol in the transmission signal from each transmitter, that is, 200 μs. In other words, the modulated waves from the two reception antennas are alternately obtained at least seven times each while the data of one symbol is transmitted.
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