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Channel state information related feedback reporting and channel state information acquisition

A technology for channel state information and feedback messages, which is applied in the directions of transmission path sub-channel allocation, wireless communication, signaling allocation, etc., and can solve problems such as performance bottlenecks

Active Publication Date: 2020-04-10
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, CSI feedback is actually a large bottleneck in performance of state-of-the-art implementations of FDD massive MIMO systems (e.g., massive MIMO systems)

Method used

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  • Channel state information related feedback reporting and channel state information acquisition
  • Channel state information related feedback reporting and channel state information acquisition
  • Channel state information related feedback reporting and channel state information acquisition

Examples

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Embodiment Construction

[0082] figure 1 A communication system 100 in a multiple-input multiple-output (MIMO) configuration provided by an embodiment of the present invention is shown.

[0083] The communication system 100 includes at least one base station (base station, BS) 110 and at least one user equipment (user equipment, UE) 120 . The BS 110 includes a plurality of antennas 111 . UE 120 includes one or more antennas 121 . Accordingly, a communication channel can be established between each combination of the antenna 111 of the BS 110 and the antenna 121 of the UE 120 .

[0084] The downlink of a communication system 100 in which a BS 110 of N antennas serves K UEs 120 is described below. M is the total number of antennas 121 on all UEs 120 and H represents the (M x N) downlink channel matrix concatenated on all UEs 120 . P is a precoding matrix. From a conceptual point of view, when BS 110 fully knows H, it adopts the recognized zero-forcing strategy and regularized zero-forcing strategy ...

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Abstract

The present invention relates to an apparatus for reporting feedback messages for channel state information (CSI) estimation with respect to a channel between a first antenna of a first device and a second antenna of a second device. The apparatus is configured to determine a frequency response across a predetermined bandwidth of the channel between the first antenna and the second antenna, samplea phase of the determined frequency response in order to obtain a number of samples of the phase of the determined frequency response, and send to a further apparatus at least a first feedback message including information of at least a subset of the obtained samples.

Description

technical field [0001] The present invention relates to the field of wireless communication, and more specifically, to the acquisition and reporting of channel state information in a multi-antenna system. Background technique [0002] To improve the performance of cellular systems, the use of large antenna arrays such as massive multiple input multiple output (MIMO) systems is a promising technology. [0003] Many current networks consist of multiple antenna devices (as in MIMO systems). The transceiver examples may be implemented, for example, in WiFi or LTE networks. In such situations, MIMO can exploit enough degrees of freedom to transmit multiple data streams to multiple users using the same radio resources. Typically, this is accomplished by a method in which the transmitter adapts the transmitted signal to the channel impulse response in advance, ie precoding. Precoding, also known as an equalizer or pre-equalizer at the transmitter side, is the basis for methods s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04L1/06H04W72/54
CPCH04B7/0658H04L1/0693H04B7/0626H04L5/0051H04L5/0053H04B7/0417H04L5/0057H04W72/542
Inventor 阮万明梅鲁安·黛巴马可·马索
Owner HUAWEI TECH CO LTD