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Cooperated multi-point transmission method suitable for 3D-MIMO (Multiple Input Multiple Output) system

A 3D-MIMO, multi-point transmission technology, applied in transmission systems, digital transmission systems, baseband system components and other directions, can solve problems such as not considering multi-point cooperative processing

Inactive Publication Date: 2015-05-06
XIDIAN UNIV
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Problems solved by technology

This scheme effectively reduces the interference between cells, but still does not consider how to perform multi-point cooperative processing in the 3D-MIMO system

Method used

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  • Cooperated multi-point transmission method suitable for 3D-MIMO (Multiple Input Multiple Output) system
  • Cooperated multi-point transmission method suitable for 3D-MIMO (Multiple Input Multiple Output) system
  • Cooperated multi-point transmission method suitable for 3D-MIMO (Multiple Input Multiple Output) system

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Embodiment Construction

[0039] In order to facilitate the understanding of the purpose, technical solutions and effects of the present invention, the present invention will now be further described in detail in conjunction with examples.

[0040] On the premise of fully considering the actual channel space characteristics, the CoMP transmission method described in the present invention first performs a limited feedback precoding design in the vertical direction, and then obtains the horizontal direction through the method based on maximizing the signal-to-noise ratio. The precoding vector can reduce the interference between cells. In particular, limited feedback precoding in the vertical direction and coordinated multi-point precoding in the horizontal direction jointly form a coordinated multi-point transmission method suitable for 3D-MIMO systems.

[0041] The coordinated multi-point transmission method of the present invention is formed based on vertical precoding and horizontal coordinated multi-...

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Abstract

The invention discloses a cooperated multi-point transmission method suitable for a 3D-MIMO (Multiple Input Multiple Output) system. Under the condition that a three-dimensional channel space resource is utilized to the greatest extent, firstly, a pre-coding design is carried out in a vertical direction; after an equivalent level channel is obtained, a cooperated multi-point processing technology based on a maximized signal leakage to noise ratio SLNR algorithm and the interferences between cells are reduced to the minimum. The method specifically comprises the following steps: (1) receiving a signal design by a user from the 3D-MIMO system; (2) pre-coding a three-dimensional channel in the vertical direction; (3) selecting a horizontal direction pre-coding vector based on the maximized SLNR algorithm; (4) obtaining a downstream multi-point cooperated pre-coding matrix under a 3D-MIMO channel; and (5) forming a three-dimensional wave beam and emission a signal. By the aid of the cooperated multi-point transmission method, the space resource is sufficiently utilized and interferences are avoided; user performances are extremely improved and the interferences between the cells are effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a coordinated multi-point transmission method, in particular to a coordinated multi-point transmission method applicable to a 3D-MIMO system. Background technique [0002] The adoption of OFDMA (Orthogonal Frequency Division Multiple Access, Orthogonal Frequency Division Multiple Access) technology in LTE-A (Long Term Evolution-Advanced) system makes the multiple access interference of users in the cell well suppressed, but it does not Eliminate co-channel interference between cells. Coordinated Multiple Points (CoMP) breaks through traditional single-point transmission, and several cells geographically separated cooperate to jointly transmit data for users. Coordinated multi-point transmission makes inter-cell interference into useful information for users, or minimizes interference through cooperation, improves user signal quality, and improves system spectrum eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04L1/00H04L25/02
Inventor 李勇朝王伟马克刘灿井文文韩萍
Owner XIDIAN UNIV
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