| 摘要 |
PROBLEM TO BE SOLVED: To accurately correct a reception signal by estimating a propagation path with high precision. SOLUTION: The phase offset of an oscillator in an RF circuit between a transmitter and a receiver is estimated based on a propagation path measurement result. Then, a time difference from the propagation path measurement result is decided until data reception is started is measured, and the propagation path measurement result is corrected according to a phase offset quantity acquired from the phase offset estimation circuit. Thus, it is possible to compensate an error of the propagation path measurement value caused by the phase offset since the propagation path measurement value is decided until the data reception is started. Therefore, it is possible to achieve data demodulation based on the correct propagation path measurement value, and to eliminate the risk of demodulation processing resulting in breakdown. COPYRIGHT: (C)2008,JPO&INPIT
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