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Method and device for acquiring PMI

A technology of noise variance and initial value, applied in the field of PMI acquisition, which can solve the problem of huge computational complexity of UE feedback

Pending Publication Date: 2021-03-23
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that if the traversal search algorithm in the related art continues to be used for each layer, then the computational complexity of UE feedback will become very large

Method used

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  • Method and device for acquiring PMI
  • Method and device for acquiring PMI
  • Method and device for acquiring PMI

Examples

Experimental program
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Embodiment Construction

[0103] In a typical configuration of the present application, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0104]Memory may include non-permanent storage in computer readable media, in the form of random access memory (RAM) and / or nonvolatile memory such as read only memory (ROM) or flash RAM. Memory is an example of computer readable media.

[0105] Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can be implemented by any method or technology for storage of information. Information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read-Onl...

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Abstract

The invention discloses a method and a device for acquiring PMI, which achieve the acquiring of PMI through grading, greatly reduce the calculation frequency of PMI acquiring while guaranteeing the search performance, improve the processing speed of a mobile terminal, and also reduce the hardware implementation difficulty. The method further comprises a pre-search process, the approximate range offirst PMI2 is determined firstly, then multi-pattern first PMI4 pre-search is further carried out on the basis of first PMI2 pre-search, and final PMI selection performance degradation caused by thecapacity flat-bottom effect due to phase primary selection errors between broadband beams and broadband panels is effectively avoided.

Description

technical field [0001] The present application relates to but not limited to the next generation communication technology, especially a method and device for obtaining PMI. Background technique [0002] The fifth generation mobile communication technology (5G) system uses a large-scale antenna array and beamforming technology to improve system performance. The beamforming technology based on a large-scale antenna array requires accurate acquisition of channel state information (CSI, Channel State Information) at the transmitting end, and selects the optimal beam to transmit data according to the obtained CSI. [0003] The channel state information is obtained by feeding back the user equipment (UE, User Equipment) at the receiving end to the sending end, and the feedback information includes: CSI Reference Signals (CSI-RS, CSI Reference Signals), CSI-RS Resource Indication (CRI, CSI -RS Resource Indicator), channel matrix rank indication (RI, Rank Indicator), precoding code...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0639H04B7/0626H04B7/0632H04B7/0456H04B7/0691H04B7/0469H04B7/065H04B7/0634H04B7/0478H04B7/0413H04B7/0417
Inventor 卞青
Owner SANECHIPS TECH CO LTD
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