| 摘要 |
A receiving level measuring circuit, which is capable of improving measuring accuracy of a receiving level by correcting phase rotation caused by a frequency error between oscillators included in a transmitter and a receiver and by inhibiting an inappropriate correction when no desirable wave exists and is adapting to a receiver configuration having a plurality of antennas (branches), wherein a desirable/interference wave detection unit detects a frequency error vector, an adder, a frequency error averaging unit, and an arctangent operation unit add up and average the frequency error vectors and performs a unit conversion of the resultant value, a frequency error correction table previously stores a correction value corresponding to the frequency error so as to get the correction value corresponding to the frequency error, an adder adds up a plurality of desirable wave components, and a frequency error correction unit corrects the desirable wave component by using the correction value.
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