Method and system of MIMO transmission

A transmission method and multi-output technology, which is applied in the field of MIMO transmission technology and scheduling, can solve the problems of high feedback overhead and high feedback accuracy requirements, and achieve the effect of reducing feedback overhead and implementation complexity

Inactive Publication Date: 2008-06-25
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, high feedback overhead and high feedback accuracy requirements are the main disadvantages of zero-forcing beamforming.

Method used

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  • Method and system of MIMO transmission
  • Method and system of MIMO transmission
  • Method and system of MIMO transmission

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Embodiment Construction

[0066] The present invention will be specifically described below in conjunction with the accompanying drawings.

[0067] As shown in FIG. 1 , the system of the present invention includes a transmitting end 11 and receiving ends 12.1, 12.2, . . . , 12.K. The receiving ends 12.1, 12.2, ..., 12.K have the same structure, and the receiving ends 12.1, 12.2, ..., 12.K are called the receiving end 12 for the description party, and each receiving end 12 corresponds to a user.

[0068] The transmitting end 11 is used for transmitting channel estimation signals, user data signals, candidate scheduling user set information, receiving feedback signals, and the like. As shown in FIG. 2 , the transmitting end 11 includes: a beamforming mode controller 111, a random beamformer 112, a feedback information processor 113, an alternative user selector 114, a scheduler 115, a zero-forcing beamformer 116, a duplex A radio frequency device 117 and multiple transmitting antennas.

[0069] The re...

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Abstract

The invention provides a multi-input and multi-output (MIMO) transmission method as well as the system thereof. In the method, a transmitting end transmits the information estimated by a signal path, each receiving end generates random beam shaping feedback information and sends out the random beam shaping feedback information to the transmitting end, and the transmitting end carries out user preselection to generate an alternative scheduling user collection, which is sent to each receiving end; each receiving end carries out feedback judgement, if the feedback is allowed, zero forcing beam shaping feedback information is generated, and is sent to the transmitting end; the transmitting end carries out user scheduling to obtain scheduling users, and transmits user data to the scheduling users. The invention has the advantages of the random beam shaping feedback information and the zero forcing beam shaping feedback information at the same time, reduces the feedback spending of the system and the complexity of the implementation, and improves the system capacity.

Description

technical field [0001] The invention relates to transmission and user scheduling technology in a multiple-input multiple-output wireless communication system, in particular to a MIMO transmission technology and a scheduling method combining random beamforming and zero-forcing beamforming. Background technique [0002] With the sharp increase in the number of mobile communication users and the rapid rise of wireless broadband services (such as multimedia services), people expect that future mobile communication systems can provide higher data transmission rates (above 100Mbps), higher spectral efficiency (10bps / Hz above). [0003] Multiple Input Multiple Output (MIMO) is a technology that simultaneously uses multiple antennas at the transmitting end and the receiving end. MIMO is an effective means to improve the spectrum efficiency, and it can double the spectrum efficiency of the system without increasing the transmit power. [0004] Beamforming is a typical MIMO technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04B7/06H04B7/08
Inventor 刘应状郑治凯王德胜孙俊林宏志周宗仪朱光喜
Owner HUAZHONG UNIV OF SCI & TECH
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