Cooperative multi-point transmission method based on interference alignment and interference neutralization

Abstract

The invention discloses a cooperative multi-point transmission method based on interference alignment and interference neutralization. The cooperative multi-point transmission method based on interference alignment and interference neutralization only uses base station side cooperation, eliminates residual interference and recovers expectation data through the precode vector design based on interference alignment and interference neutralization and an orthogonal projection filtering wave receiving technology adopted at a user side. Compared with the prior art, concurrent transmission of multiple paths of data is achieved only by using base station side cooperation and through combined design of precode emission and filtering wave receiving. At an emission end, two paths of interference signals carrying identical data information are aligned to opposite directions of the same sub-space through an IN, and interference signals carrying different data information are aligned to the same sub-space through an IA. A receiving end adopts orthogonal projection filtering waves to finish elimination of residual interference and recovery of the expectation data. In addition, the cooperative multi-point transmission method based on interference alignment and interference neutralization uses interaction of partial data, does not need user side cooperation, can make full use of space reuse capacity provided by multiple antenna systems, and achieves improvement in the handling performance of the systems.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a coordinated multi-point transmission method based on interference alignment and interference neutralization. Background technique [0002] It is an inevitable trend in the development of wireless communication networks to improve spectral efficiency to meet the increasing user data transmission requirements. With the continuous increase of the frequency reuse degree, the users located at the edge of the cell will receive co-channel interference from adjacent cells, thus affecting the overall performance of the system. Therefore, how to effectively solve the interference problem of the cell edge users and improve the system throughput has become an urgent problem to be solved. The coordinated multi-point (Coordinated multi-point, CoMP) transmission technology achieves this goal through the cooperation between multiple cells, and has become one of the key techn...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a coordinated multi-point transmission method based on interference alignment and interference neutralization, which aims to solve the existing cooperative multi-point transmission method that requires user-side coordination and cannot make full use of the multi-antenna system to provide The spatial multiplexing capability reduces the problem of system throughput performance

Images