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A user equipment, access equipment and precoding method

A technology for user equipment and access equipment, which is applied in the field of precoding and can solve problems such as high overhead

Active Publication Date: 2021-08-13
HUAWEI TECH CO LTD
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Problems solved by technology

When the precoding matrix contains multiple precoding vectors, or when multiple narrowband precoding vectors need to be fed back, the resulting overhead will become larger

Method used

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  • A user equipment, access equipment and precoding method
  • A user equipment, access equipment and precoding method
  • A user equipment, access equipment and precoding method

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Embodiment Construction

[0179] It can be seen from the background art that the beam combining technology can improve the precision of the precoding vector, but it will also greatly increase the indication overhead. In contrast, the beam selection technology only needs to report the index of the selected candidate matrix when indicating the precoding matrix, which can greatly reduce the indication overhead, but the accuracy of the precoding matrix is ​​not high.

[0180] The next-generation wireless communication system currently under research and development may also be called a New Radio (NR) system or a 5G system. The latest research progress shows that in the next generation of wireless communication systems, both beam selection technology and beam combination technology will be adopted in order to make full use of the respective advantages of the two technologies. Specifically, when the number of layers does not exceed 2, the beam combination technology is used to determine the precoding vector....

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Abstract

An embodiment of the present invention provides a user equipment, including a processing module, configured to generate indication information indicating multiple precoding vectors, where the multiple precoding vectors include j first-type precoding vectors and k second-type precoding vectors vector, each of the first type of precoding vectors is expressed as: where is a component vector, and any two component vectors among them are orthogonal to each other, α m,i,r is the subvector x m,r The superposition coefficient of the middle component vector, 1≤m≤j, L>1, r=1 or 2; each second-type precoding vector is expressed as: , where is the component vector used to construct the second-type precoding vector , is the phase parameter of the second type of precoding vector, 1≤n≤k; the transceiver module is used to send indication information. The embodiment of the present invention also provides an access device and a precoding method. The technical solution provided by the embodiment of the present invention helps to effectively limit the overhead caused by indicating the precoding vector while improving the precision of the precoding vector.

Description

technical field [0001] Embodiments of the present invention relate to precoding technologies, and in particular, to a user equipment, access equipment and a precoding method. Background technique [0002] The emergence of multiple input multiple output (Multiple Input Multiple Output, MIMO) technology has brought revolutionary changes to wireless communication. MIMO technology can significantly improve the performance of the wireless communication system by deploying multiple antennas on the transmitting end device and the receiving end device. For example, in a diversity scenario, MIMO technology can effectively improve transmission reliability; in a multiplexing scenario, MIMO technology can double the transmission throughput. [0003] An important branch of MIMO technology is precoding. This technology uses a precoding matrix that matches the channel properties to process the signal to be transmitted, so that the precoded signal to be transmitted is adapted to the channe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04L5/00
CPCH04B7/0456H04L5/00
Inventor 王潇涵金黄平
Owner HUAWEI TECH CO LTD
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