Embodiments of the invention provide a signal transmission method of a wireless communication system, the method comprising: selecting a phase compensation value for a k-th layer of user data of the wireless communication system, performing, according to the phase compensation value, phase rotation on a reference signal in the k-th layer user data, so that a signal power of the reference signal, after performing interference mitigation thereon at a transmission end, does not exceed a predetermined power threshold, wherein, k is selected from 1 to M, and M is less than or equal to K, and K is the total number of layers of user data of the wireless communication system; and transmitting, through a wireless channel, the reference signal after the phase rotation.

Embodiments of the invention provide a signal transmission method of a wireless communication system, the method comprising: selecting a phase compensation value for a k-th layer of user data of the wireless communication system, performing, according to the phase compensation value, phase rotation on a reference signal in the k-th layer user data, so that a signal power of the reference signal, after performing interference mitigation thereon at a transmission end, does not exceed a predetermined power threshold, wherein, k is selected from 1 to M, and M is less than or equal to K, and K is the total number of layers of user data of the wireless communication system; and transmitting, through a wireless channel, the reference signal after the phase rotation.

The present invention is directed to the selective provision of interference canceled signal streams to demodulating fingers in a communication receiver. According to the present invention, potential interferer signal paths are identified. Signal streams having one or more potential interferer signals removed or canceled are created, and a correlation is performed to determine whether the strength of a desired signal path increased as a result. If the correlation indicates that the strength of a desired signal path was increased by the signal cancellation, the interference canceled signal stream is provided to the demodulation finger assigned to track the desired signal path. If the correlation determines that the strength of the desired signal path did not increase as a result of performing interference cancellation, the raw or a different interference canceled signal stream is provided to the demodulation finger.

A receiver in a CDMA system comprises a front end processor that generates a combined signal per source. A symbol estimator processes the combined signal to produce symbol estimates. An S-Matrix Generation module refines these symbol estimates based on the sub channel symbol estimates. An interference canceller is configured for cancelling interference from at least one of the plurality of received signals for producing at least one interference-cancelled signal.