Method of calculating movement speed and device for calculating movement speed

摘要

In a baseband processing circuit unit, a reception signal type determination unit determines whether or not a reception signal in a GPS reception unit is an indirect wave. A movement speed calculation unit calculates a movement speed of the GPS reception unit using a correction coefficient of a relative speed determined in accordance with the determination of whether or not the reception signal is an indirect wave, a transmission frequency of a GPS satellite signal and a reception frequency in the GPS reception unit.

主权项

1. A method for calculating a movement speed of a receiver receiving a transmission signal from a predetermined transmission source, the method comprising:
determining whether a reception signal of the receiver is an indirect wave, a direct wave, or a multipath signal; and based on a principle that a reception frequency changes depending on a relative speed of the transmission source and the receiver, calculating the movement speed of the receiver using a correction coefficient of the relative speed, a transmission frequency of the transmission signal at the transmission source and the reception frequency in the receiver, wherein the correction coefficient has a first value when the reception signal is determined to be a direct wave, the correction coefficient has a second value when the reception signal is determined to be a multipath wave, and the correction coefficient has a third value when the reception signal is determined to be an indirect wave.