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Precoding indication method and device and control method based on MU-MIMO

A technology of precoding indication and precoding matrix, applied in baseband system components, shaping network in transmitter/receiver, diversity/multi-antenna system, etc., can solve problems such as error, precoding matrix cannot be decoded correctly, etc. , to achieve the effect of improving system performance

Active Publication Date: 2008-09-24
ZTE CORP
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  • Summary
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AI Technical Summary

Problems solved by technology

In SU-MIMO, the following situations exist: the index number sent by the UE uplink is different from the index number received by the eNodeB, so that the precoding matrix used by the eNodeB can not be decoded correctly on the UE side, resulting in errors; or because the eNodeB adopts other strategies Transmitting without using the PMI fed back by the UE, i.e. the eNodeB additionally selects the precoding matrix, leading to an erroneous situation
[0006] In addition, in MU-MIMO under the current LTE standard framework, in order to improve system performance, when multiple users are scheduled simultaneously, if one of the UEs can obtain the interference precoding matrix information of other co-scheduled UEs, that is, other scheduling The precoding vector adopted by the user is undoubtedly ideal

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  • Precoding indication method and device and control method based on MU-MIMO
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  • Precoding indication method and device and control method based on MU-MIMO

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Embodiment Construction

[0023] Currently, for LTE single-rank closed-loop transmission, most companies agree to add a format 1B format on the basis of DCI (downlink control information) format 1A, but format 1B is limited to continuous resource allocation, because downlink MU-MIMO supports both continuous Resource allocation also supports discrete resource allocation. Therefore, the technical solution provided by the embodiment of the present invention considers adding information for MU-MIMO downlink precoding control on the basis of format 1. Format 1 (downlink control information format 1) is defined as DL- A SIMO (Single Input Multi-Output, Single Input Multiple Output) operation allocation format of the SCH (Shared Downlink Channel).

[0024] For the LTE standard, the embodiment of the present invention provides a signaling design scheme including two-user scheduling. On the basis of DCI format 1, the signaling content in format 1 is kept unchanged, and signaling bits representing precoding infor...

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Abstract

The invention discloses a precoding indication method based on MU-MIMO and a device thereof, and a precoding control method. In the precoding indication method base on MU-MIMO, a base station sends precoding indication information to target-user equipment, wherein the precoding indication information comprises index confirmation information of a precoding matrix and index information of the precoding matrix. The index confirmation information of the precoding matrix is used for presenting whether precoding matrix index fed back by the target-user equipment is adopted by a base station; the index information of the precoding matrix is used for indicating the precoding matrix index which is used by the target-user equipment or indicating interference precoding matrix index used by another user equipment which is commonly controlled with the target-user equipment. The precoding indication method based on MU-MIMO and the device thereof, and a precoding control method has the advantage of improving the system performance.

Description

technical field [0001] The present invention relates to a multiple-input multiple-output (Multiple-Input Multiple-Output, referred to as MIMO) wireless mobile communication system, in particular, to a precoding indication method based on a multi-user MIMO (MU-MIMO) mode in a MIMO wireless mobile communication system and Device, precoding control method. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) is one of the core technologies in the fourth generation mobile communication, and it is essentially a multi-carrier modulation communication technology. In the frequency domain, the OFDM multipath channel exhibits frequency-selective fading characteristics. In order to overcome this fading, the channel is divided into multiple sub-channels in the frequency domain. The spectral characteristics of each sub-channel are approximately flat, and each sub-channel of OFDM The channels are orthogonal to each other, so the spectrums of the sub-channels ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04L1/00H04L1/06H04B7/06
Inventor 支周于辉魏巍禹忠卢忱
Owner ZTE CORP