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Stratospheric Massive MIMO Client Beamforming Method

A beamforming and large-scale technology, applied in the field of stratospheric wireless communication, can solve the problems of large amount of calculation, difficult advection communication system, and large amount of data interaction, and achieve the effect of reducing energy loss and reducing requirements

Inactive Publication Date: 2021-04-02
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the current interference suppression method for large-scale MIMO systems on the ground, it is difficult to apply to the advection communication system due to the large amount of calculation and the large amount of data interaction.

Method used

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  • Stratospheric Massive MIMO Client Beamforming Method
  • Stratospheric Massive MIMO Client Beamforming Method
  • Stratospheric Massive MIMO Client Beamforming Method

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Embodiment Construction

[0039]The present invention will be described in detail below with reference to the specific embodiments. The following examples will help to further understand the present invention in any form of technicrat, it will be further understood by those skilled in the art. It should be noted that several deformations and improvements can be made without departing from the concept of the present invention without departing from the present invention. These are all of the scope of protection of the present invention.

[0040]The present invention provides a large-scale MIMO user end beamforming method for a flat-flow layer, which is considered a single data flow condition, i.e., the base station transmits a single data stream to each user. The user is calculated based on the channel correlation matrix of each base station, calculates the beam forming vector. During the uplink pilot transmission phase, due to the beam pointing to the target base station, the pilot pollution is mitigated, and t...

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Abstract

A large-scale MIMO us terminal beam forming method for stratosphere comprise that following steps: step 1: a large-scale MIMO platform for stratosphere sends downlink pilot signal; step 2: a user maximizes the signal-pilot pollution power ratio by using the receiver correlation matrix; step 3, a needle solves the SPR maximization problem through a positive semi-definite relaxation method to obtaina user end beamforming vector; Step 4: adopting the beamforming vector obtained in step 3, the user performs beamforming operation in uplink pilot transmission and downlink data transmission. The invention has the advantages of low information exchange quantity, low processing complexity of the base station, wide application range, no additional feedback and the like.

Description

Technical field[0001]The present invention relates to a flat-flow layer wireless communication method, in particular, to a large-scale MIMO (Multiple Input Multiple Output, multi-input multi-output) user end beamforming method.Background technique[0002]In multi-user MIMO systems, the transmitter channel status information (CSIT, CHANEL STATE INFORMATIONAT THE TRANSTER) has an important impact on system performance. Accurate modeling CSIT error can provide a basis for subsequent system performance analysis and precoding algorithm design. In a honeycomb network based on time division, the user (UE) periodically transmits the uplink pilot signal, the base station estimates CSIT by estimating the pilot signal of the cell user. During the estimation, the CSIT error is mainly caused by the following factors: Since the transmitting of the pilot is periodically, the Estimation time of the CSIT is delayed; in the actual use of CSIT, there is noise influence in the pilot channel; During trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0452H04B7/06
CPCH04B7/0452H04B7/0617
Inventor 袭奇何晨蒋铃鸽练柱先
Owner SHANGHAI JIAO TONG UNIV
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