Space division multiple address (SDMA) transmission method and base station in multi-carrier MU multiple input multiple output (MIMO) system

A carrier, multiple input technology, applied in the field of communication networks, can solve problems such as joint use of precoding algorithms, no scheduling mechanism, and no consideration of MUMIMO transmission architecture, so as to reduce energy loss and eliminate MUI.

Active Publication Date: 2013-03-20
HUAWEI TECH CO LTD
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Problems solved by technology

[0012] However, the prior art mechanism is proposed for only one antenna at the UT side
In addition, the precoding algorithm is limited to the zero-breaking method, and it does not give how the scheduling mechanism is used in conjunction with the existing precoding algorithm
This method selects the largest user combination after calculating the zero-forcing (ZF) capacity or SNR of each

Method used

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  • Space division multiple address (SDMA) transmission method and base station in multi-carrier MU multiple input multiple output (MIMO) system
  • Space division multiple address (SDMA) transmission method and base station in multi-carrier MU multiple input multiple output (MIMO) system
  • Space division multiple address (SDMA) transmission method and base station in multi-carrier MU multiple input multiple output (MIMO) system

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Embodiment Construction

[0032] figure 1 is a block diagram of the MU MIMO downlink system. like figure 1 As shown, there is an M on the side of the base station T transmit antennas; correspondingly, there are K user terminals, and each user terminal has receiving antennas, i=1, 2, ..., K. Therefore, the total number of receiving antennas is Base station has M T channel information between a transmit antenna and a receive antenna of a single user terminal. It should be noted that in this specification, a user and a user terminal have equivalent meanings.

[0033] On the base station side, the transmission signal to be sent to the i-th user is defined as r i - a vector of dimensions x i , where i=1, 2, . . . , K. r i is the number of data streams sent to the i-th user. The vector of K users can be expressed as in

[0034] Each transmitted signal needs to be precoded before transmission. The precoding matrix for K users can be expressed in the form of a joint precoding matrix: in ...

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Abstract

The invention provides a space division multiple address (SDMA) packet schedule method and a base station of a multi-carrier MU multiple input multiple output (MIMO) system. A projected matrix on a combined channel matrix of the other users in the same user group of each user in the user group is calculated, wherein the user group is selected from a plurality of users, a capacity metric of the user group is calculated according to the projected matrix, an optimal user group is selected according the capacity metric of a plurality of user groups. According to the SDMA packet schedule method and the base station of the multi-carrier MU MIMO system, multilingual user interface (MUI) on a terminal user at an emitting end is effectively removed, and calculating complexity is reduced.

Description

technical field [0001] The invention relates to a communication network, in particular to a space division multiplexing access technology based on multiple input and multiple output. Background technique [0002] The MIMO technology (Multiple-Input Multiple-Output, Multiple-Input Multiple-Output) allows multiple antennas to simultaneously transmit and receive multiple spatial streams. The capacity of the channel can be increased by using the MIMO technology, and at the same time, the reliability of the channel can be improved and the bit error rate can be reduced. And SDMA (Space Division Multiple Access, Space Division Multiple Access) is a newly developed multiple access technology, which uses space division to form different channels. Because SDMA technology has the potential to greatly improve the capacity and performance of wireless communication systems, it has attracted extensive attention from researchers. [0003] However, when SDMA technology is applied to MU MIM...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04W72/12
CPCH04W72/121H04W8/00H04W72/046H04W72/12H04B7/0452H04L1/06H04L1/00H04L25/0242H04L25/0204H04L25/03898H04L43/08
Inventor 董明杰程瑶李胜弗洛里安·罗默张建树马丁·哈特
Owner HUAWEI TECH CO LTD
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