Patent Number: 7,822,142

Title: Method and device for cancelling interference in wireless communication system

Abstract: The present invention provides a transmitter having multiple transmitting antennas, comprising: SM/STC apparatus for performing spatial multiplexing or space-time coding diversity on data and for causing resulting signals to be transmitted parallel by multiple transmitting antennas; and a controller for controlling the SM/STC apparatus to operate in SM mode or STC diversity mode in accordance with a signal indicating the operating area which a receiver is located in. The present invention further a corresponding receiver, a base station device and user equipment each comprising the transmitter and receiver of the present invention, and a corresponding method of interference cancellation. The present invention can obtain both diversity gain and interference cancellation gain by performing interference cancellation at the receiver side when interference from other transmitters dominates in the channel. Therefore, the present invention can improve the system capacity and coverage without increasing the base station complexity or decreasing the spectrum usage efficiency at the cell edge.

Inventors: Yang; Hongwei (Shanghai, CN), Zhu; Xiaolong (Shanghai, CN)

Assignee: Alcatel Lucent

International Classification: H04L 1/02 (20060101); H04L 27/00 (20060101)

Expiration Date: 2018-10-26 0:00:00