| 摘要 |
PROBLEM TO BE SOLVED: To prevent the antenna of radio communication equipment from being installed in a place where reception ability drops since the influence of dip and phase change by multi-path phasing is large. SOLUTION: In the reception system of radio communication equipment, radio communication is performed by using a modulation signal where a plurality of pilot signals are inserted into a multi-carrier on a frequency axis at regular intervals. In a discrete Fourier transformation part 29, the pilot signal is extracted from the reception signal of the modulation signal. A pilot signal amplitude/phase detection part 32 detects amplitude information and phase information of the extracted pilot signal. A personal computer 34 compares detected amplification information and phase information with original amplitude information and phase information which are previously set. When detected amplitude information and phase information largely differ from original amplitude information and phase information, it is discriminated that multi-path phasing occurs, and it is informed by using a display screen.
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