Method for dividing multi-user channel estimation and equipment thereof

A channel estimation and multi-user technology, applied in the field of communication, can solve the problems of deteriorating SDMA cell throughput, large channel estimation error, affecting channel estimation performance and user grouping performance, etc.

Active Publication Date: 2010-06-23
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0016] The disadvantage of the prior art is: for the user grouping step of SDMA, the channel estimation of each user must be obtained at the base station, but for the Default scheme of Midamble code allocation in the existing standard, if each group of SDMA users occupies The same time slot code channel resources, then the same Midamble code shift will be used. If the same pilot frequency (ie Midamble code shift) is used for channel estimation of each user, it will cause serious mutual interference between users, and the channel The estimation error is very large, which affects the channel estimation performance and user grouping performance, and finally deteriorates the throughput of SDMA cells
[0017] For terminals with MIMO capabilities in HSPA+, although a new Midamble code allocation scheme is adopted, in the existing TDD HSPA standards and implementations, there is no method that can support SDMA to distinguish user channel estimation

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  • Method for dividing multi-user channel estimation and equipment thereof
  • Method for dividing multi-user channel estimation and equipment thereof
  • Method for dividing multi-user channel estimation and equipment thereof

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Embodiment Construction

[0071] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0072] In the embodiment of the present invention, different existing Midamble code allocation schemes will be proposed, and the base station will use uplink channels with different Midamble code shifts to distinguish multi-user channel estimation, and then use it to support SDMA in HSPA.

[0073] The following briefly introduces some uplink channels in TDD HSPA:

[0074]a) In HSPA, DPCH (Dedicated Physical Channel) is a dedicated physical channel. For the 1.28Mcps LCR (Low Chip Rate, low chip rate) TDD system, in HSDPA (High-Speed ​​downlink packet access, high-speed downlink packet access), HS-DSCH (High-Speed ​​Downlink Shared Channel, high-speed downlink Shared channel) each UE (UserEquipment, user equipment) requires an accompanying DPCH on the downlink HS-DSCH channel, and one or more HS-SCCH (High-Speed ​​shared control channel, high-speed shar...

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Abstract

The invention discloses a method for dividing multi-user channel estimation and equipment thereof. The method comprises the following steps: when users in a cell are accessed to a network, each user reports user self capacity level to the network side; the network side acquires a Midamble code distribution proposal supported by each user according to the capacity level reported by each user; and multi-user channel estimation is divided according to the Midamble code distribution proposal of each user. By using the method and the equipment, user channel estimation division supporting space division multiple access can be realized, and better user division effect can be acquired for subsequent application of space division multiple access.

Description

technical field [0001] The invention relates to communication technology, in particular to a method and equipment for distinguishing multi-user channel estimation. Background technique [0002] SDMA (Space Division Multiple Access) is space division multiple access, which can distinguish multiple users occupying the same resource (time slot, code channel, frequency) by using the spatial degrees of freedom provided by multiple antennas, so as to realize multiple User data sending and receiving. The purpose of introducing SDMA is to increase the average data transmission rate of the cell. [0003] The way to realize SDMA is related to the multi-antenna technology adopted. In the smart antenna array, multi-beam forming technology is used for multi-user space division, and multiple main beams are aligned to users occupying the same resource for data transmission and reception. There are two important applications of beamforming technology: on the one hand, the signal-to-inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08H04B1/707H04W48/12
Inventor 杨宇
Owner DATANG MOBILE COMM EQUIP CO LTD
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