Topological interference alignment method of MIMO interference broadcast channel

A broadcast channel and interference alignment technology, applied to the shaping network, transmission system, electrical components and other directions in the transmitter/receiver, can solve the problem of the inability to achieve multiple input multiple output interference broadcast channel MIMOIBC topology interference alignment, etc. Interference cancellation effect

Active Publication Date: 2017-05-10
XIDIAN UNIV
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Problems solved by technology

[0009] The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and propose a topological interference alignment method for MIMO interference broadcast channel...

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  • Topological interference alignment method of MIMO interference broadcast channel
  • Topological interference alignment method of MIMO interference broadcast channel
  • Topological interference alignment method of MIMO interference broadcast channel

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[0034] The technical solutions and effects of the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] refer to figure 1 , the implementation steps of the present invention are as follows:

[0036] Step 1. System Settings.

[0037] Such as figure 2 As shown, it is assumed that the MIMO IBC system with multiple-input multiple-output interference broadcast channel has L cells, each cell contains a base station and several users, and the ith cell MS i serves the cell K i The base station of a user is BS i, and the jth user in the cell is represented as MS[i,j], i∈{1,2,...,L},j∈{1,2,...,K i}, the number of antennas configured by base station BS i is M i , the number of antennas configured by user MS[i,j] is N ij , the number of antennas configured in cell MS i is N i , set M i ≥N i , when M i i , turn off (N i -M i ) root receiving antenna to get M i ≥N i , figure 2 The solid line represents the transmi...

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Abstract

The invention provides a topological interference alignment method of an MIMO interference broadcast channel for solving the technical problem that the topological interference alignment of generalized MIMO cannot be realized in the prior art. The method comprises the following steps: setting the system; constructing a partial connection model of MIMO IBC, and then converting the same into the partial connection model of MIMO IC through virtual base station expansion; solving a precoding matrix and a decoding matrix of an MIMO IC system satisfying a topological interference condition; designing an MIMO IBC precoding matrix and a decoding matrix, and eliminating inter-cell interference through proper signal processing technology; and designing a precoding matrix of a base station to eliminate intra-cell interference. By adoption of the topological interference alignment method provided by the invention, the topological interference alignment of generalized MIMO IBC can be realized, and a lower limit of a degree of freedom that can be reached by the MIMO IBC system with given topological information can be analyzed.

Description

technical field [0001] The invention belongs to the technical field of communications, and relates to a topological interference alignment method, in particular to a topological interference alignment method for a MIMO interference broadcast channel, which can be used in a multiple-input multiple-output interference broadcast channel MIMO IBC system. Background technique [0002] In the wireless communication system, due to the complexity of the signal propagation environment, how to overcome factors such as multipath fading and shadow effect, so as to effectively improve the transmission rate and spectrum utilization of the wireless system, is the research and development of wireless communication technology to be solved a key question. The proposal of multiple-input multiple-output MIMO technology provides a new idea for solving these problems. As a technology that can effectively improve system transmission rate and spectrum utilization, it has become a research hotspot i...

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Application Information

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IPC IPC(8): H04B7/0413H04B7/0452H04B7/0456H04L12/24H04L25/03
CPCH04B7/0413H04B7/0452H04B7/0456H04L25/03006H04L41/12H04L41/145
Inventor 刘伟陈丹李建东刘勤黄鹏宇
Owner XIDIAN UNIV
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