User choosing method, device and system

A user and user group technology, applied in diversity/multi-antenna systems, space transmit diversity and other directions, can solve the problems of error, difficult application, and high algorithm complexity, and achieve the effect of ensuring performance and reducing complexity

Inactive Publication Date: 2009-12-30
POTEVIO INFORMATION TECH +1
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Problems solved by technology

[0029] It can be seen from the above technical solutions that method 1 utilizes the reciprocity of the uplink and downlink channels to obtain complete channel state information, which can achieve optimal system performance. In this case, the complexity of the algorithm is very high, and it is difficult to apply it in the actua

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  • User choosing method, device and system
  • User choosing method, device and system
  • User choosing method, device and system

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[0053] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0054] image 3 It is the flow chart of the user selection method provided by the present invention, such as image 3 As shown, the method includes:

[0055] Step 301: Store the codebook grouped according to the orthogonality principle on the base station side and the user terminal side respectively.

[0056] Step 302: The user terminal estimates the channel, selects a codebook according to the channel estimation information, and feeds back the channel estimation information and the selected codebook information to the base station.

[0057] In this step, the user terminal calculates the SINR value or CQI value corresponding to each codebook according to the channel estimation information, and selects the codebook corresponding to the maximum SINR...

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Abstract

The embodiment of the invention discloses a user choosing method, a device and a system. The method comprise the following steps: codebooks grouped by the orthogonality principle are respectively stored at a base station side and a user terminal side; the user terminal estimates a channel, chooses a codebook according to channel estimating information, and feeds back the channel estimating information and chosen codebook information to the base station; the base station groups the user terminal according to the codebook grouping situation and feedback codebook information of the user terminal; a user group is chosen according to the feedback channel estimating information of the user terminal; a user is chosen from the chosen user group according to the channel estimating information of each user in the user group. The base station comprises a storing module, a user grouping module, a user group choosing module and a user choosing module. The system comprises a user terminal and a base station. Under the condition of ensuring system performance, the invention can lower the complexity in user choosing.

Description

technical field [0001] The present invention relates to the technical field of multiple-input multiple-output (MIMO) precoding in the field of mobile communication, in particular to a user selection method, device and system. Background technique [0002] At present, in the MIMO system, methods for user selection are mainly divided into two categories. Method 1 is mainly used in time-division duplex (TDD) systems. The base station completely knows the channel state information of all users according to the reciprocity of uplink and downlink channels, and then polls all users, and selects users according to established criteria; method The second is mainly used in the frequency division duplex (FDD) system. The base station does not estimate the channel, but only selects the user through the feedback information of the user end. This is a single user rate control (Per User Unitary Rate Control, PU2RC) method. [0003] The above two methods are described in detail below. ...

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Application Information

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IPC IPC(8): H04B7/04
Inventor 龚萍吕旌阳林雪红房亮赵振山雷旭胡炜
Owner POTEVIO INFORMATION TECH
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