Uplink collaboration multi-point (CoMP) method and system

Abstract

The invention provides an uplink collaboration multi-point (CoMP) method and system, wherein the method comprises the following steps that a service base station acquires the state information of a service channel and a collaboration channel; and a pre-coding matrix that a terminal uses when sending uplink data is determined according to the state information of the service channel and the collaboration channel. According to the invention, the service base station determines the pre-coding matrix that the terminal uses when sending the uplink data according to the acquired state information of the service channel and the collaboration channel, the interference is reduced before the data is sent, the data is received through a joint receiving (JR) technology after the interference is reduced, so that the signal-to-noise ratio of a received signal of an uplink can be improved, the data transmission of uplink CoMP is realized, and the system performance is improved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to an uplink Cooperative Multi-Point (Cooperative Multi-Point, CoMP) method and system. Background technique [0002] The rapid development of wireless communication technology and the increasing demand for wireless network capacity have greatly accelerated the consumption of spectrum resources. How to make full use of limited spectrum resources and improve spectrum efficiency is a major problem in wireless communication. The multiple-input multiple-output (Multiple-Input Multiple-Output, MIMO) technology is widely used because it can improve spectrum efficiency without increasing bandwidth. MIMO technology utilizes space diversity gain through transmit and receive diversity, antenna array gain through beamforming technology, and spatial multiplexing gain through spatial multiplexing technology. Specifically, to obtain space diversity gain, the weak correlation of spat...

AI Technical Summary

Problems solved by technology

[0010] According to the technical characteristics of uplink and downlink CoMP, downlink CoMP technology can not only achieve precoding coordination, but also reduce interference, while uplink CoMP technology only increases the received energy and has no effect on interference suppression. Even if the existing interference suppression technology Used in combination with CoMP technology, for example, JR reception based on the Linear Minimum Mean Square Error (LMMSE, Linear Minimum Mean Square Error) criterion is also a passive interference suppression technology, and it cannot take interference cancellation into consideration when transmitting like the downlink CoMP technology , that is, the interference is eliminated in advance at the sending end, so that the performance of the uplink JR technology is affected

Images