Signal transmission method of wireless communication system, base station and user equipment

A device in a wireless communication system, comprising:

• a processor;
• non-transitory machine-readable storage medium;
• a program module stored in the non-transitory machine-readable storage medium, and capable of being executed by the processor;
• and a transmitting unit;
• wherein the program module is configured to:
• select a phase compensation value for user data of the k-th layer in the device;
• wherein k is an integer within 1 to M, M is a positive integer smaller than or equal to K;
• K is the total number of layers of user data in the base station;
• apply phase rotation to a reference signal in user data of the k-th layer using the phase compensation value to make the reference signal after interference cancellation on a transmitter side have a signal power within a pre-defined power threshold;
• and
• modulate a data signal in the user data of the k-th layer using the phase compensation value;
• the transmitting unit is configured to:
• transmit the reference signal processed through the phase rotation and the modulated data signal.

A non-transitory machine-readable storage medium, storing machine-readable instructions executable by a processor to:

• select a phase compensation value for user data of the k-th layer of a wireless communication system, apply phase rotation to a reference signal in the user data of the k-th layer using the phase compensation value to make the reference signal after interference cancellation on a transmitter side have a power within a pre-defined power threshold, wherein k is an integer within 1 to M, M is a positive integer smaller than or equal to K;
• K is the total number of layers of user data in the wireless communication system;
• and
• transmit, via a wireless channel, the reference signal through the phase rotation.