Embodiments of the present invention describe a method of obtaining the arrival time at all times when a mobile terminal is located, including: receiving (s102) a location reference signal sent by a location transmitter; performing (s104) time domain related processing on the location reference signal and a synchronization reference signal sequence to obtain a related spectrum value from a multipath signal component corresponding to a delay value; detect (s106) a channel parameter used when the location reference signal is received, and generate, according to the channel parameter and a function that progressively decreases with the delay value, a related spectrum threshold that progressively decreases with the delay value; and traverse (s108) the delay value in ascending order of the delay value, search for a first traversal delay value whose related spectrum value of a multipath signal component that corresponds to the delay value is greater than a threshold related spectrum corresponding to the delay value, and using the delay value found as the emission toa.
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