Method, device and system for forming TDD multi-input multi-output descending beam

A time-division duplex, multi-input technology, applied in diversity/multi-antenna systems, transmission systems, radio transmission systems, etc., can solve the problems of not determining the optimal weights, high complexity, and data flow rate cannot be guaranteed. , to achieve the effect of reducing the implementation complexity and simplifying the operation

Active Publication Date: 2009-07-01
HUAWEI TECH CO LTD
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, this method requires the feedback of long-term statistics from the mobile terminal, and the base station and the mobile terminal must simultaneously perform SVD decomposition to select the transmission mode. At the same time, the base station also maintains a random statistic. implementation, so the implementatio

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method, device and system for forming TDD multi-input multi-output descending beam
  • Method, device and system for forming TDD multi-input multi-output descending beam
  • Method, device and system for forming TDD multi-input multi-output descending beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] In the embodiment of the present invention, in the case of no feedback information, the rates of other data streams are statistically guaranteed while maximizing the use of accurate PCSI. In order to ensure the rate brought by accurate PCSI, the transmit beams of other streams are limited in the null space of PCSI, that is, the data stream corresponding to PCSI has no inter-stream interference.

[0031] figure 1 It is a schematic flowchart of a downlink beamforming method for time division duplex multiple input multiple output according to an embodiment of the present invention.

[0032] Such as figure 1 As shown, the method includes:

[0033] Step 101: Generate a transmit beam of the first data stream according to the maxim...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The embodiment of the invention discloses a beam forming method of a time duplex division (TDD) multi-input multi-output (MIMO) system. The method comprises the following steps: generating the transmitted beam of a first data stream based on the maximum-ratio transmission (MRT) principle; and generating the transmitted beam of another data stream other than the first data stream, and allowing the transmitted beam of the another data stream to be restricted in the null space of the first data stream. The embodiment of the invention also discloses a base station, a receiver and a communication system. Under the condition of no feedback information, the beam forming method utilizes the reciprocity-induced imperfect channel information as much as possible, reduces the complexity, and increases the velocity of the data stream.

Description

technical field [0001] The present invention relates to the technical field of time division duplex (TDD, Time Duplex Division), and more specifically, to a downlink beamforming method, device and system of time division duplex multiple-input multiple-output. Background technique [0002] In recent years, information theory research has shown that multiple antenna technology (MIMO, Multiple Input Multiple Output) can significantly improve the multiplexing gain and diversity gain of a communication system. If BLAST technology is used, different transmitting antennas will transmit different data streams, and the capacity of the system will increase in proportion to the rank of the MIMO channel; if space-time coding and single beamforming technology are used, all antennas will transmit the same data stream To improve transmission reliability, the maximum diversity gain can be equal to the product of the number of transmitting antennas and the number of receiving antennas. Of c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04B7/02H04L1/06
CPCH04B7/0404H04B7/0658H04B7/0408H04B7/0617H04B7/0413
Inventor 杨绿溪许道峰杜颖钢
Owner HUAWEI TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap