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Method for processing multiple-user multiple input multiple output (MU-MIMO) system and base station

A processing method and base station technology, applied in the field of MU-MIMO system processing method and base station, can solve a large number of calculation processes, increase system complexity and other problems, and achieve the effect of efficient user grouping

Inactive Publication Date: 2012-01-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a processing method and a base station for an MU-MIMO system, so as to at least solve the problem that when the system allows more than three users to form a group, the traversal method requires a large number of calculation processes, which increases the complexity of the system degree of question

Method used

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  • Method for processing multiple-user multiple input multiple output (MU-MIMO) system and base station
  • Method for processing multiple-user multiple input multiple output (MU-MIMO) system and base station
  • Method for processing multiple-user multiple input multiple output (MU-MIMO) system and base station

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Experimental program
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Embodiment 1

[0047] This embodiment illustrates how the base station uses known codebooks to construct a codeword correlation coefficient table or a codeword distance table. Of course, the correlation coefficient or codeword distance calculation method used therein is only one of them, and other methods can also be used in practice. Calculation of the correlation coefficient or distance in the following way: Assume that the known codebook C is used for a base station configured with 4 transmitting antennas. Wherein C includes 16 codewords of rank=1, 16 codewords of rank=2, 8 codewords of rank=3 and 4 codewords of rank=4. This embodiment mainly illustrates the construction of rank=1 and 2 The correlation coefficient or distance table T 1 and T 2 .

[0048] (1) The case of calculating the correlation coefficient between all codewords whose rank (rank) is n in the codebook C is:

[0049] For the case of rank=1, the 16 codeword column vectors are respectively Then calculate the correlatio...

Embodiment 2

[0062] This embodiment is used to illustrate that the base station side selects N from the user set to be grouped. MU = 4 users paired to use MU-MIMO. Assume that there are currently 20 users to be grouped to form a set as Ω={U 1 , U 2 ,...U 20}, the current set of MU-MIMO group users The base station sets the MU-MIMO user correlation coefficient threshold TH r = 0.2.

[0063] Step 1, the base station first selects the main scheduling user among them, set U 3 , and the index of the most recent feedback rank=1 codeword is 3, the base station will set Ω MU update to Ω MU ={U 3}, then in form T 1 All values ​​in row 3 are selected less than th r =0.2 value, let them be respectively Then its corresponding column index constitutes the set I 1 ={2,8,12,14,16}, then in Ω={U 1 , U 2 ,...U 20} to find the codeword index for user feedback belongs to I 1 = {2, 8, 12, 14, 16} set of users, set as Ω 1 ={U 1 , U 4 , U 5 , U 7 , U 10 , U 12 , U 16}, update Ω to Ω 1...

Embodiment 3

[0068] This embodiment is used to illustrate that the base station selects N MU = 4 users paired to use MU-MIMO. Assume that there are currently 20 users to be grouped to form a set as Ω={U 1 , U 2 ,...U 20}, the current set of MU-MIMO group users The base station sets the MU-MIMO user correlation threshold TH r = 0.2.

[0069] Step 1, the base station is first at Ω={U 1 , U 2 ,...U 20} to select the main scheduling user, set to U 3 , and the index of the most recent feedback rank=1 codeword is 3, the base station will set Ω MU update to Ω MU ={U 3}, then in form T 1 All values ​​in row 3 are selected less than th r =0.2 values, let them be Then its corresponding column index constitutes the set I 1 ={2,8,12,14,16}, then in Ω={U 1 , U 2 ,...U 20} to find the user's codeword index belongs to I 1 = {2, 8, 12, 14, 16} set of users, set as Ω 1 ={U 1 , U 4 , U 5 , U 7 , U 10 , U 12 , U 16}, update Ω to Ω 1 , namely Ω={U 1 , U 4 , U 5 , U 7 , U 10 ...

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Abstract

The invention discloses a method for processing a multiple-user multiple input multiple output (MU-MIMO) system and a base station. The method comprises the following steps that: 202, the base station calculates the correlation of all code words with the same rank in a codebook which is locally stored; 204, determining a main scheduling user from a set of users to be grouped, and adding the main scheduling user into a grouped user set; 206, according a code word index which is fed back by the main scheduling user and the pre-calculated correlation, determining a first set from the set of users to be grouped, and updating the set of users to be grouped by using the first set, wherein the correlation of the first set and the main scheduling users meets a size relation of a predetermined threshold value; and repeatedly performing the steps 204 and 206 until the quantity of users in the grouped user set is equal to a grouped user quantity threshold value, or the set of users to be grouped is a null set. By the invention, the users can be quickly and efficiently grouped.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a processing method and a base station for an MU-MIMO (Multiple-User Multiple Input Multiple Output, multi-user multiple input multiple output) system. Background technique [0002] MIMO (Multiple Input Multiple Output) technology is a major breakthrough in smart antenna technology in the field of wireless mobile communications. This technology can double the capacity and spectrum utilization of the communication system without increasing the bandwidth. It can use multipath to reduce multipath fading, and can effectively eliminate co-channel interference, improve channel reliability, and reduce errors. Code rate is a key technology adopted by the new generation mobile communication system. [0003] At present, in the mature or nearly mature 3G / B3G wireless communication system, the base station side and the terminal side configure multiple sets of transmitting / receiving antenn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00
CPCH04W72/121H04L5/001H04B7/0639H04L5/0023H04B7/0417H04L5/0064H04L25/03898
Inventor 朱登魁宁迪浩李子荣鲁照华
Owner ZTE CORP