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Method and device for processing MU-MIMO (Multiuser Multiple-Input Multiple-Output) based on orthogonal diversity

A processing method and diversity precoding technology, applied in the field of transmit diversity, can solve problems such as not fully utilizing antenna and carrier resources, not involving multi-user orthogonal diversity multiplexing, and limiting LTE performance

Active Publication Date: 2011-03-30
苏州医疗器械产业发展集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the existing version of LTE, the antenna and carrier resources are not fully utilized when the 4-antenna is transmitted, and only a single-user transmit diversity scheme is adopted, and multi-user orthogonal diversity multiplexing is not involved, thus limiting the performance of LTE

Method used

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  • Method and device for processing MU-MIMO (Multiuser Multiple-Input Multiple-Output) based on orthogonal diversity
  • Method and device for processing MU-MIMO (Multiuser Multiple-Input Multiple-Output) based on orthogonal diversity
  • Method and device for processing MU-MIMO (Multiuser Multiple-Input Multiple-Output) based on orthogonal diversity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1: 4-antenna multi-user 2-antenna diversity coding matrix is ​​as follows:

[0063] Subcarrier user 1

[0064] Subcarrier user 2

[0065] Divide the two streams of different users (the data stream of user 1 and the data stream of user 2) into two layers respectively, perform orthogonal diversity precoding respectively, and then multiply different precoding vectors or BF for different users Vector, and then transmit user data through the actual antenna after resource mapping.

[0066] The precoding vector or BF vector here is to eliminate the interference between multiple users on the one hand, that is, through zero forcing (ZF, Zero Forcing), block diagonalization (BD, Block Diagnolization) and Tomlinson-Halashi Tomlinson-Harashima Precoding (THP, Tomlinson-Harashima Precoding) and other methods, or through multi-user weighted vector pairing criteria to perform interference cancellation; on the other hand, in order to enhance the diversity gain of each ...

Embodiment 2

[0068] Embodiment 2: 8-antenna multi-user 2-antenna diversity coding matrix is ​​as follows:

[0069] Subcarrier user 1

[0070] Subcarrier user 2

[0071] Subcarrier user 3

[0072] Subcarrier user 4

[0073] When multiplexing 4 users in the case of 8 antennas, first map the streams of the first two users to four layers, then map the streams of the last two users to the other four layers, and then perform orthogonal diversity pre-processing Coding, and then multiplied by different precoding vectors or BF vectors for different users, and finally through resource mapping (mapped to the same time-frequency resource) and then sent out through the actual antenna. The calculation method of the precoding vector or the BF vector is the same as that in the first embodiment.

[0074] It should be pointed out that when the channel information is PMI or Rank Index (RI, Rank Index), when there is no optimal orthogonal weight vector, a pairing method of Signal to Leakage Noise ...

Embodiment 3

[0075] Embodiment 3: 8-antenna multi-user 4-antenna diversity coding matrix:

[0076] Subcarrier S 11 S 23 - S 12 * - S 24 * S 12 S 24 S 11 * S 23 * S 21 S 13 - S...

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Abstract

The invention discloses a method for processing multiuser multiple-input multiple-output (MU-MIMO) based on orthogonal diversity, which comprises the steps of: precoding data flows of different users by independent delamination and specific orthogonal diversity, and mapping the data in a space-frequency coded matrix; carrying out multiuser precoding or beam forming (BF) processing on data of different users in the space-frequency coded matrix; and transmitting the processed data subjected to resource mapping outside through a transmitting antenna. The invention also discloses a device for processing MU-MIMO based on orthogonal diversity. By using the method and the device, the processing of multiuser transmitting diversity is realized, the resources of the antenna and carrier waves are fully used, and more users can be multiplexed under the same resource consumption.

Description

technical field [0001] The present invention relates to the transmit diversity technology in the Long Term Evolution (LTE, Long Term Evolution) system, in particular to a multi-user multiple input multiple output (MU--MIMO, Multiple User Multiple Input Multiple Output) processing method and device based on orthogonal diversity . Background technique [0002] In the LTE system, the downlink defines that the diversity method when the transmit antenna is 2 antennas is space-frequency coding (SFBC, Space-Frequency Block Codes), and the coding matrix is ​​as follows: [0003] [0004] In the above formula, each row of the matrix corresponds to a different transmitting frequency, and each column of the matrix corresponds to a different transmitting antenna; S 1 Indicates the data mapped to subcarrier (Subcarrier) 1 at the first moment, S 2 Indicates the data mapped to Subcarrier 2 at the second moment, and represent S respectively 1 and S 2 the conjugate. [0005] When...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04B7/06
CPCH04B7/0452
Inventor 郭森宝姜静
Owner 苏州医疗器械产业发展集团有限公司
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