Calculation method of rank indication and precoding matrix index, and receiving end equipment

A technology of precoding matrix and calculation method, which is applied in space transmission diversity, transmission system, energy consumption reduction, etc., and can solve the problems of multiple precoding codebooks, high complexity of RI and PMI search algorithms, high calculation load of RI and PMI, etc. , to achieve the effect of reducing the number of times and reducing matrix inversion operations

Active Publication Date: 2022-03-18
上海擎昆信息科技有限公司
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Problems solved by technology

[0022] The complexity of the traditional RI and PMI search algorithms mentioned above is particularly high, because the set of configurable layers in the 5G system is {1, 2, 3, 4, 5, 6, 7, 8}, and the set of configurable CSI-RS ports is {2, 4, 8, 12, 16, 24, 32}, so the number of precoding codebooks that need to be traversed is very large, and the channel capacity calculation of each subcarrier requires matrix inversion, so the calculation load of RI and PMI very high

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  • Calculation method of rank indication and precoding matrix index, and receiving end equipment
  • Calculation method of rank indication and precoding matrix index, and receiving end equipment
  • Calculation method of rank indication and precoding matrix index, and receiving end equipment

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[0057] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.

[0058] In order to make the drawing concise, each drawing only schematically shows the parts related to the present invention, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically drawn or only one of them is marked. Herein, "a" not only means "only one", but also means "more than one".

[0059] An embodime...

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Abstract

The invention provides a rank indication and precoding matrix index calculation method and receiving end equipment. The rank indication and precoding matrix index calculation method comprises the following steps: acquiring an average channel correlation matrix of a measurement bandwidth for channel state information (CSI) measurement; calculating the channel capacity of the measurement bandwidth according to the average channel correlation matrix of the measurement bandwidth; and traversing all possible spatial layers and all possible precoding matrixes in the first spatial layer set to obtain a spatial layer and a precoding matrix index which enable the channel capacity of the measurement bandwidth to be maximum. According to the invention, the calculation complexity of the precoding matrix index and the rank indication can be greatly reduced.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a calculation method for rank indication and precoding matrix index, and a receiving end device. Background technique [0002] Channel state information (Channel State Information, CSI) is very important to improve the transmission quality of wireless communication. Generally, the receiving end device (such as a user equipment UE such as a smart phone) obtains channel state information according to a reference signal (Reference Signal, RS) transmitted by a transmitting end device (such as an access device such as a base station), and feeds back the obtained CSI to the transmitting end equipment. The transmitting end device performs precoding processing on the transmitting signal based on the CSI and sends it to the receiving end device. Through the precoding processing at the transmitting end, not only the performance of the receiving end can be improved, but also ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0626H04B7/063Y02D30/70
Inventor 唐兵武传国谭定富是元吉
Owner 上海擎昆信息科技有限公司
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