Methods for transmitting and receiving signals, base station and mobile terminal

The invention provides a method for transmitting uplink signals. The method comprises the following steps: inserting TSC assigned to a first user by a network side into data of the first user to be transmitted; modulating MSK for the data in which the TSC is inserted; rotating the phase for a signal obtained by the modulation according to an angle 1 of the assigned TSC relative to the first user,wherein the difference of the angle 1 and an angle 2 of the TSC relative to a second user is odd number times of 90 degrees, the network side assigns the TSC to the second user based on the same timeslot resource for sending data, and the angle 1 is equal to the absolute value of an angle 3 of the TSC assigned to the first user relative to the network side, and the angle 1 and the angle 3 have opposite directions; and transmitting the signal after phase rotation in the same time slot resource. The invention also discloses a method for receiving the uplink signals, methods for transmitting andreceiving downlink signals, a mobile terminal and a base station. By adopting the scheme of the invention, signals can not interfere mutually between two users based on same time slot multiplexing onan uplink/downlink signal transmission link.