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Method and device for sending and receiving multi-user data

A user data and multi-user technology, applied in the field of multi-user data transmission and reception methods and devices, can solve problems such as beam interference, influence of detection accuracy, incompletely orthogonal beams, etc., so as to solve the interference between beams and improve detection. The effect of accuracy

Active Publication Date: 2020-02-28
DATANG MOBILE COMM EQUIP CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0004] For the NOMA-MIMO scheme proposed by NTT DoCoMo, its shortcoming is that since each beam is not completely orthogonal, there will be interference between different beams, which will greatly affect the accuracy of multi-user detection in which the receiving end only detects the signal of this beam. influences

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  • Method and device for sending and receiving multi-user data
  • Method and device for sending and receiving multi-user data
  • Method and device for sending and receiving multi-user data

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Embodiment Construction

[0062] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0063] For the NOMA-MIMO scheme proposed by NTT DoCoMo, since the beams are not completely orthogonal, there will be interference between different beams, which will have a great impact on the accuracy of multi-user detection in which the receiver only detects the signal of this beam.

[0064] Based on this, the application adopts a novel non-orthogonal multiple access technology, which is called PDMA (Pattern Division Multiple Access, Pattern Division Multiple Access) technology in the implementation, and it utilizes the asymmetry of multi-user channel Through the design of multi-user unequal diversity sparse coding matrix and code-modulation joint optimization scheme, multi-dimensional non-orthogonal signal superposition transmission in time-frequency domain, power domain and air domain can be realized, and higher multi-user multiplexing and diversity ...

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Abstract

Disclosed are a method and apparatus for sending and receiving multi-user data. The method comprises: at a sending end, after multi-user data are subject to channel encoding, performing encoding modulation on each path of data that are subject to channel encoding according to an encoding matrix, wherein a codeword of each path of channel data corresponds to a column of the encoding matrix; performing power allocation on each path of channel data by taking a codeword as a unit; mapping a codeword modulation symbol of each path of channel data to a multiple-input multiple-output layer; after performing multiple-input multiple-output pre-coding, performing resource mapping on each path of channel data; and sending each path of data that are subject to resource mapping after performing orthogonal frequency division multiplexing modulation on same respectively. A receiving end extracts prior information about user data from data acquired by means of a multi-user joint detection according to a mapping relationship between the codeword modulation symbol and the multiple-input multiple-output layer, power, and a codeword of the encoding matrix; and separates the user data according to the prior information about the user data. The present application can support more users, and can solve the problem of interference between wave beams.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for sending and receiving multi-user data. Background technique [0002] The downlink MIMO (Multiple Input Multiple Output) technology of LTE / LTE-A (LTE: Long Term Evolution, long-term evolution; LTE-A: Long Term Evolution-Advanced, long-term evolution enhancement) is constantly evolving. The number of antennas increases, the codebook is enhanced, and multi-user support is gradually improved. At present, LTE / LTE-A downlink multi-antenna technology includes open-loop SFBC (Space-Frequency Block Code, space-frequency block code), CDD (Cyclic Delay Diversity, cyclic delay diversity), closed-loop SU-MIMO (Single User-MIMO, Single-user MIMO) and MU-MIMO (Multiple Users-MIMO, multi-user MIMO) codebook-based precoding and beamforming modes. [0003] In order to meet the requirement of supporting more users in the same cell in the future, it i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04L1/00
CPCH04B7/0426H04B7/0456H04L1/0048H04L1/0076H04B7/04H04L1/00
Inventor 任斌宋扬康绍莉秦飞孙韶辉
Owner DATANG MOBILE COMM EQUIP CO LTD