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MU-MIMO (multi-user multiple-input multiple-output) user pairing method

A technology for user pairing and implementation methods, applied in diversity/multi-antenna systems, space transmit diversity, etc., can solve the problems of high computational complexity of pairing algorithms, and achieve the effect of reducing computational complexity

Inactive Publication Date: 2013-03-06
POTEVIO INFORMATION TECH
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Problems solved by technology

When the specific algorithm is implemented, multiple singular value decompositions will lead to a large computational complexity of the pairing algorithm

Method used

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  • MU-MIMO (multi-user multiple-input multiple-output) user pairing method
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  • MU-MIMO (multi-user multiple-input multiple-output) user pairing method

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] The methods provided in this step include Figure 4 The flow shown:

[0040] see Figure 4 , Figure 4 The flowchart provided for the embodiment of the present invention. Such as Figure 4 As shown, the process may include the following steps:

[0041] In step 401, the transmitting end selects the user who feeds back the CQI with the largest value from the user set, and puts the selected user into the set paired user set as the first paired user.

[0042] In this step 401, the sending end may be an eNB or other similar equipment, which is not specifically limited in the present invention. In the following, the eNB is taken as an example for description.

[0043] The information fed back by the user to the eNB includes downlink channel ...

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Abstract

The invention provides an MU-MIMO (multi-user multiple-input multiple-output) user pairing method. The method includes: A, a transmitting end selects users feeding back largest CQI (channel quality information) from a user set, and the selected users are placed in a set of set paired users; B, the transmitting end performs singular value decomposition to channel matrix of each current user in the user set once so as to obtain a null space of each user channel matrix, and performs singular value decomposition to a channel matrix of each user in the paired user set once so as to obtain a null space of each user channel matrix; C, according to the channel matrixes and null spaces of the channel matrixes of the user in the paired user set, and according to the channel matrix and the null space of the channel matrix of each current user in the user set, the transmitting end determines the users to be placed in the paired user set and places the determined users in the paired user set; and D, whether the number of the users in the paired user set meets the set requirement or not is judged; if yes, pairing is complete before; and if no, returning to the step C is performed.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a method for realizing user pairing of a multiple-input multiple-output system (MU-MIMO). Background technique [0002] In wireless communication, downlink MU-MIMO uses spatial multiplexing technology to distinguish the data of multiple downlink users on the same time-frequency resource, which effectively improves the throughput of the system. figure 1 A schematic diagram of downlink data transmission of downlink MU-MIMO is shown. Wherein, in order to eliminate the interference caused by spatial multiplexing, a precoding algorithm is used at the transmitting end (eNB) to precode user data. Currently, commonly used precoding algorithms include a Zero-Forcing precoding algorithm and a maximum Signal to Leakage and Noise Ratio based precoding algorithm. [0003] However, when downlink MU-MIMO utilizes spatial multiplexing technology to distinguish data of multiple users, the ch...

Claims

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Application Information

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IPC IPC(8): H04B7/06
Inventor 屠于康吕伯轩
Owner POTEVIO INFORMATION TECH
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