Interference suppression method and device

Abstract

The invention discloses an interference suppression method and device. The interference suppression method and device are used for solving the problem that a PMI cannot be precisely estimated and consequently an SLIC receiver or an ML receiver cannot be used for interference suppression. The method includes the steps of obtaining channel parameters which comprise a first channel matrix corresponding to a serving cell and a second channel matrix corresponding to an interfering cell; carrying out equivalent transformation on received signals to obtain an equation (please see the equation in the specification), wherein y stands for the received signals, x0 stands for first transmitted signals sent by the serving cell, xI stands for second transmitted signals sent by the interfering cell, n stands for noise signals, H0 stands for the product of pre-coding matrixes corresponding to the first channel matrix and the serving cell, HI stands for the second channel matrix, and PI stands for a pre-coding matrix corresponding to the interfering cell; making the product of the PI and the xI serve as an equivalent transmitted signal and conducting demodulation on the received signals after equivalent transformation to eliminate interference of the equivalent transmitted signal on the premise that the coefficient of the pre-coding matrix corresponding to the interfering cell is not obtained.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an interference suppression method and device. Background technique [0002] The ever-increasing demand of users for personal communication drives the continuous evolution of wireless transmission technology. At the end of 2004, the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) started the Long Term Evolution (LTE) project of Universal Mobile Telecommunications System (Universal Mobile Telecommunications System, UMTS) technology. In an actual LTE scenario, a user equipment (User Equipment, UE) may be interfered by a neighboring cell or by a paired user in the current cell, and such interference will seriously degrade the performance of the UE in demodulating a data channel. High-density and heterogeneous base stations are the evolution direction of the LTE network structure, which will obviously bring about more serious co-channel interfere...

AI Technical Summary

Problems solved by technology

[0018] Embodiments of the present invention provide an interference suppression method and device, which are used to solve the problem that the PMI corresponding to the interfering cell cannot be accurately estimated when the interference signal uses 2 ports and the number of layers is 2, or uses 4 ports and the number of layers is 4. , leading to the problem that SLIC or ML receivers cannot be used to eliminate interference

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