Patent ID: 9253751
Filing Date: 2016-02-02
CPC Classification: G01S,H04W

Claim Text:
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.