| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that although a communication system using an OFDM system can effectively use frequencies and can enhance tolerance of multipath and therefore practically used more at present, the OFDM system has directness between carriers disordered in the presence of a CFO because of a multiplex signal having spectra overlapping and then deteriorates in error rate characteristic, and it is difficult to obtain local oscillation signals which areπ/2 out of phase with each other during demodulation of an I/Q signal to cause deterioration in error rate characteristics because of imbalance between I/Q signals. SOLUTION: A method is provided in which CFO and I/Q imbalance corrections can be made at the same time based on a phase difference of a pilot signal. COPYRIGHT: (C)2009,JPO&INPIT
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