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Method and apparatus for long-term feedback for multiple-input multiple-output communication

A multi-input, multi-output technology, applied in transmission systems, radio transmission systems, electrical components, etc., can solve problems such as limited feedback channel capacity

Active Publication Date: 2019-09-06
ALCATEL LUCENT SHANGHAI BELL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, resources for measurement channels and feedback channel capacity for feedback CSI are limited, which means that new feedback structures need to be proposed and new codebooks for 3D MIMO need to be designed to facilitate efficient feedback

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  • Method and apparatus for long-term feedback for multiple-input multiple-output communication

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Embodiment Construction

[0040] In the following description, numerous details are set forth for purposes of explanation. However, one of ordinary skill in the art will recognize that embodiments of the disclosure may be practiced without the use of these specific details. Thus, the present disclosure is not intended to be limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and features described herein.

[0041] It should be understood that the terms "first", "second", etc. are only used to distinguish one element from another element. In fact, the first element can also be called the second element, and vice versa. In addition, it should also be understood that "comprising", "comprising" is only used to describe the existence of stated features, elements, functions or components, but does not exclude the existence of one or more other features, elements, functions or components.

[0042] For ease of explanation, embodiments of the present disclosu...

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Abstract

Embodiments of the present disclosure provide a method and apparatus for multi-input multi-output, MIMO, communications in a wireless communication network. The method comprises: receiving, from a device, long-term precoding information for the MIMO communication, the long-term precoding information indicating a set of three-dimensional, 3D, beams, wherein elements in the set of 3D beams are obtained by combining a column of a first matrix representing a vertical beam group with a corresponding column of a second matrix representing a horizontal beam group; receiving, from the device, short-term precoding information for the MIMO communication, the short-term precoding information indicating beams selected from the set of 3D beams; constructing a precoding matrix for the MIMO communication according to the long-term precoding information and short-term precoding information; and transmitting data encoded according to the precoding matrix to the device. Embodiments of the present disclosure further provide a method in a receiving side of MIMO, and a corresponding apparatus.

Description

technical field [0001] Embodiments of the present disclosure relate to wireless communications, and more particularly multiple-input multiple-output (MIMO) communications. Background technique [0002] Due to the limitation of time and frequency resources, improving resource utilization efficiency has always been an unremitting goal in communication technology. MIMO technology can use the airspace to transmit multiple data streams simultaneously on the same time-frequency resource block, thereby effectively improving system throughput. [0003] Two-dimensional (2D) MIMO transmission has been studied and adopted by some wireless communication systems, such as Long Term Evolution (LTE) of the 3rd Generation Partnership Project (3GPP). For 2D-MIMO, conventional antenna arrays are arranged horizontally to form beams on the horizontal plane. In order to exploit potential gains from three-dimensional (3D) wireless channels, 3D MIMO has been discussed in the field of wireless com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0417H04B7/0456
Inventor 李迅李楠张闽杨涛
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD