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Adaptive precoding in a mimo wireless communication system

A precoding and appropriate technology, applied in wireless communication, radio transmission system, diversity/multi-antenna system, etc., can solve problems such as interference channels

Active Publication Date: 2017-08-29
射频数字信号处理公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In ZF precoding, the precoding vector for the kth user is in is the multi-user interference channel of the kth user, defined as Also, CSI errors are always unavoidable due to systematic errors such as feedback bandwidth limitations and measurement errors
Therefore, it is a challenge for the BS to compare the two precoding methods for the UE and adaptively adopt the preferred precoding method

Method used

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  • Adaptive precoding in a mimo wireless communication system
  • Adaptive precoding in a mimo wireless communication system
  • Adaptive precoding in a mimo wireless communication system

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Embodiment Construction

[0011] Reference may now be made to the drawings, wherein like reference numerals refer to like parts throughout. Exemplary embodiments of the present invention are now described. These exemplary embodiments are used to illustrate aspects of the invention and should not be construed as limiting the scope of the invention. When the exemplary embodiments are described with reference to block diagrams or flowcharts, each block may represent a method step or an apparatus element for performing the method step. Depending on the implementation, corresponding device elements may be configured in hardware, software, firmware, or a combination thereof.

[0012] In the considered wireless communication system, the BS is equipped with N transmit antennas in the downlink, while without loss of generality, each UE has one receive antenna. Clearly, it can be generalized to UEs with more than one receive antenna.

[0013] Without loss of generality, we assume that the BS has selected UEs ...

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Abstract

This invention presents methods for estimating MU-MIMO channel information using SU-MIMO channel information to choose a modulation and channel coding appropriate for the quality of the MU-MIMO channels, for adaptively selecting MU-MIMO precoding methods based on estimations of a plural of UEs and for compensating hardware impairments in MU-MIMO pre-coding.

Description

[0001] This case is a divisional application of an invention patent application with an application date of December 20, 2014, an application number of 201480065687.5, and an invention title of "Adaptive Precoding in Multiple-Input and Multiple-Output Wireless Communication Systems". [0002] This application claims the benefit of US Provisional Application No. 61 / 919,613, filed December 20, 2013. technical field [0003] The invention generally relates to wireless communication, and in particular relates to a method for a base station (Base Station, BS) to generate a large-scale multiple-input multiple-output (multiple- Each user equipment (UE) in an input-multiple-output (MIMO) wireless communication system estimates channel quality information (channel quality information, CQI) and uses an adaptive precoding mechanism. Background technique [0004] In a massive / very massive MIMO system, the BS is equipped with dozens or even hundreds of transmit antennas. It has received...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/0452H04B7/0456H04B7/06H04L1/00H04L5/00H04L5/14H04L25/02H04W36/08H04W72/04
CPCH04B7/0452H04B7/0456H04B7/046H04B7/0482H04B7/0626H04B7/0632H04L1/0026H04L5/0048H04L5/14H04L25/0202H04W36/08H04W72/21
Inventor 朱登魁梁平
Owner 射频数字信号处理公司
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