Method and equipment for sending multi-user MIMO

A transmission method and technology of transmission equipment, which are applied in the directions of space transmit diversity, diversity/multi-antenna systems, etc., can solve the problem of not considering user QoS requirements, and achieve the effect of reducing system bit error rate and improving spectral efficiency.

Active Publication Date: 2011-01-05
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current MIMO-THP system does not take into account the different QoS requirements of users when designing, and does not distinguish the needs of different users.

Method used

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  • Method and equipment for sending multi-user MIMO
  • Method and equipment for sending multi-user MIMO
  • Method and equipment for sending multi-user MIMO

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Embodiment Construction

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0023] In order to facilitate the understanding of the present invention, a brief introduction is first made to the spatial transmission and reception models of the MIMO system.

[0024] For the MIMO downlink system, it is considered that each user has one antenna, assuming that K is the number of users, then the sending data vector of all users is a=(a 1 , a 2 ,...,a K ) T , a i is the data of user i. Through power allocation and precoding processing, the user data is converted into antenna transmission vectors allocated to the tra...

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Abstract

The embodiment of the invention provides a method for sending multi-user MIMO, which comprises the following steps of: acquiring coefficients corresponding to QoS of users according to the QoS of the users; performing power allocation on the users according to the coefficients corresponding to the QoS of the users and the characteristic of a channel matrix; sending a data vector subjected to the power allocation to a precoding processing module; and after being processed, sending the data vector by using N antennae. The embodiment of the invention also provides equipment for sending the multi-user MIMO. In the technical scheme provided by the invention, the technology of the power allocation is introduced to a MIMO system, and the matrix is processed in a combined way by taking the transformation of a power allocation algorithm on a signal and the transformation of a precoding algorithm on a channel into consideration comprehensively; and on the basis of realizing diversity gain, power resources are allocated reasonably to different users by the user QoS-based power allocation algorithm so as to meet the different performance requirements of the users.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular, the present invention relates to a multi-user MIMO transmission method and equipment. Background technique [0002] Mobile and broadband have become the development direction of modern communication technology. How to eliminate the influence of co-channel interference, multiple access interference and multipath fading has become the main factor that people consider when improving the performance of wireless mobile communication systems. In recent years, MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) multi-antenna system has become a research hotspot in the field of mobile communication. [0003] The MIMO multi-antenna system refers to a technology that uses multiple transmit antennas and multiple receive antennas for wireless transmission. Its essence is to divide the space communication link into multiple independent parallel sub-channels, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/06
Inventor 龚萍吕铁军云翔
Owner DATANG MOBILE COMM EQUIP CO LTD
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