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Method for self-adapting regulation of beam-forming right value update graininess

An adaptive adjustment and beam technology, applied in diversity/multi-antenna systems, space transmit diversity and other directions, can solve the problem that the update granularity cannot meet the high-speed mobility requirements of UE, and achieve stable and reliable system performance, guarantee system performance, and ensure system performance. Effect

Inactive Publication Date: 2009-02-25
ZTE CORP
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a design method for adaptively adjusting the update granularity of beamforming weights to solve the problem that using one update granularity cannot meet the high-speed mobile requirements of the UE

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  • Method for self-adapting regulation of beam-forming right value update graininess

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] In order to ensure the performance of beamforming, the beamforming weights should have the ability to track channel changes, especially when the channel changes rapidly, that is, the channel changes rapidly, a small weight update granularity should be used, such as in Orthogonal Frequency Division Multiplexing (OFDM ) system, the number of OFDM symbols and the number of subcarriers in the resource block become smaller, so that the weight of beamforming is updated quickly, and the performance of beamforming will not be reduced due to the rapid change of the channel; when the channel changes slowly, a large The weight update granularity can ensure system performance while reducing feedback overhead and processing complexity.

[0025] The speed of the channel change is closely related to the moving speed of the UE, so the idea of ​​the present invention i...

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Abstract

The invention discloses a method for self-adaptive regulation of beam forming weight update granularity, which aims to solve the problem that one update granularity cannot satisfy the requirements of user equipment for high-speed movement. The method comprises the steps of setting an initial value of beam forming weight update granularity according to the speed of user equipment, and performing self-adaptive regulation of the beam forming weight update granularity according to the channel change speed. The inventive method can be used in a mobile communication system to carry out self-adaptive regulation of the beam forming weight update granularity according to the channel change speed.

Description

technical field [0001] The invention relates to a mobile communication system, in particular to a design method for adjusting the update granularity of weight values ​​in adaptive beamforming. Background technique [0002] Beamforming can increase the coverage of the cell, improve the link performance of the cell edge users, and realize the elimination of spatial interference and increase the system capacity. Beamforming generates beamforming weights according to the channel state. Whether the beamforming weights corresponding to time-frequency resource blocks can reflect the characteristics of the channel will greatly affect the performance of beamforming. [0003] The current beamforming uses the same time-frequency resource granularity for processing, but since the maximum mobile speed supported by the third-generation mobile communication (B3G) and the fourth-generation mobile communication (4G) is greater than 350km / h, in this case , using a weight update granularity, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/06H04B7/08
Inventor 姜静王衍文支周
Owner ZTE CORP
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