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Method and device for double-current wave beam shaping

A beamforming, dual-stream beam technology, applied in the field of communication, can solve the problems of poor performance and high complexity

Active Publication Date: 2013-09-25
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In this solution, eigenvalue decomposition needs to be performed to calculate two eigenvectors, which has high complexity, and when the terminal uses one antenna to send uplink pilots, using this method to determine the eigenvectors also leads to poor performance

Method used

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  • Method and device for double-current wave beam shaping
  • Method and device for double-current wave beam shaping

Examples

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Embodiment 1

[0035] Use the estimated DOA to calculate a set of array response vector V, take the conjugate of vector V, and assign parameters according to the number of transmitting antennas in each group of the base station, and generate two sets of coefficients V1, V2, where the dimensions of V1, V2 are equal to V, V1 The first half of V2 is the same as the first half after V is conjugated, and the second half is filled with zeros. The second half of V2 is the same as the second half after V is conjugated, and the first half is filled with zeros.

[0036] Considering the power limitation of each antenna, the limited power is set to P, and the amplitudes of V1 and V2 are normalized and multiplied by the root P, which is used as the weighting coefficient of the antenna and applied to the dual-stream beamforming.

[0037] Specifically, in this embodiment, step S201 specifically includes:

[0038] Perform uplink channel estimation according to the full bandwidth or the uplink pilot of the s...

Embodiment 2

[0076] Use the estimated DOA to calculate a set of array response vector V, take the conjugate of the vector V, and assign parameters according to the number of transmitting antennas in each group of the base station, and generate two sets of coefficients V1, V2, where the dimensions of V1, V2 are equal to V, V1 The first half of V2 is the same as the first half after V is conjugated, and the second half is filled with zeros. The second half of V2 is the same as the second half after V is conjugated, and the first half is filled with zeros.

[0077] After multiplying V1 and V2 by the corresponding codebook, they are used as the weighting coefficients of the antenna and applied to the dual-stream beamforming. Two codebook selection schemes can be considered for specific implementation:

[0078] 1) Store a certain codebook set, take turns or randomly select the codebook and multiply it to V1, V2 to get W1, W2.

[0079] Considering the power limit of each antenna, the limit powe...

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Abstract

The invention discloses a method and device for double-current wave beam shaping, and relates to the communication technology. Firstly, array response vectors are determined according to DOA angles; secondly, according to the array response vectors, parameters are distributed based on the number of transmitting antennas of each set of base station, two sets of coefficients are generated, wave beam shaping is carried out on the antennas according to the two sets of coefficients, the process that characteristic values are decomposed to obtain characteristic vectors is not needed, and complexity of the double-current wave beam shaping is reduced.

Description

technical field [0001] The present invention relates to communication technology, in particular to a dual-stream beamforming method and device. Background technique [0002] In recent years, the rapid development of mobile communication and the development of other wireless applications have made wireless spectrum resources increasingly tight. Therefore, in order to meet the needs of the increase in the number of users and the development of new services, it is necessary to further increase the system capacity and improve the spectrum utilization of the system. [0003] Wide application of MIMO (Multiple In Multiple Out, multiple input multiple output) technology makes it possible to transmit multiple data streams in space. Beamforming has been widely used because its clear directional beam can increase the coverage distance, improve signal quality, improve the ability to penetrate buildings, and increase the throughput of users at the cell edge. [0004] The current dual-s...

Claims

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Application Information

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IPC IPC(8): H04B7/06
CPCH04B7/0617G01S3/74H04B7/0456H04B7/086H04W16/28H04W64/006H04B7/0465H04B7/0413H04B7/0408H04B7/0691H04B7/0697H04B7/0897H04L1/00
Inventor 刘龙李琼
Owner DATANG MOBILE COMM EQUIP CO LTD
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