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Beam based pre-processing in mu-mimo system

A beam and precoding technology, applied in the field of precoding solutions, can solve problems such as increasing the complexity of CSI-RS signaling baseband processing

Active Publication Date: 2021-06-01
ALCATEL LUCENT SHANGHAI BELL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005]In summary, a large number of TRX configurations significantly increases the CSI-RS signaling overhead and baseband processing complexity at the gNB and UE sides

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  • Beam based pre-processing in mu-mimo system
  • Beam based pre-processing in mu-mimo system
  • Beam based pre-processing in mu-mimo system

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Embodiment Construction

[0040] Hereinafter, the principle and spirit of the present disclosure will be described with reference to the illustrative embodiments. It should be understood that all these embodiments are provided only for those skilled in the art to better understand and further practice the present invention, rather than to limit the scope of the present invention. For example, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. In the interest of clarity, not all features of an actual implementation are described in this specification.

[0041] References in the specification to "one embodiment," "an embodiment," "example embodiment," etc. mean that the described embodiments may include a particular feature, structure, or characteristic, but that not every embodiment necessarily includes the particular feature, structure, or characteristic. feature, structure or characteristic. Moreover, such phrases are ...

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Abstract

Embodiments of the present disclosure provide an apparatus and method for beam based pre-processing in a transmitting device in a multi-user multiple-input multiple-output (MU-MIMO) system. The transmitting device further comprises a transmission and receiver unit (TRX) array and a digital precoding module. The apparatus is configured to map a plurality of TRXs of the TRX array to a plurality of transmit ports of the digital precoding module according to a precoding matrix, wherein the number of transmit ports is less than the number of the plurality of TRXs. The precoding matrix is characterized by determining a channel covariance matrix for a plurality of receiving devices based on the channel information between the plurality of receiving devices and the transmitting device, performing an eigen decomposition operation on the channel covariance matrix to derive an eigenvector matrix, and selecting multiple eigenvectors from the eigenvector matrix as column vectors of the precoding matrix.

Description

technical field [0001] The non-limiting and exemplary embodiments of the present disclosure relate generally to precoding solutions for multi-user multiple-input multiple-output (MU-MIMO) systems, and in particular to beam-based precoding solutions in MU-MIMO systems. Apparatus and method for processing precoding. Background technique [0002] Massive MIMO technology has been identified as one of the key technologies for 5G New Radio (NR) systems. Massive MIMO technology meets the ever-increasing performance requirements of 5G NR, but a large number of antenna elements (AE) or transceiver units (TRX) deployed in massive MIMO systems (such as MU-MIMO systems) inevitably bring huge baseband processing Complexity, hardware implementation cost, channel measurement and feedback signaling overhead, etc. How to effectively solve these problems is the key to successfully guarantee the application of massive MIMO. [0003] Hybrid precoding is a low-cost high-capacity solution for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0452
CPCH04B7/0434H04B7/0456H04B7/0617
Inventor 刘皓赵岩孙欢
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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