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Spatial channel state feedback method and device

A space channel and state feedback technology, applied in the field of transmission, can solve problems affecting system performance, and achieve the effect of reducing feedback information and eliminating redundant feedback

Inactive Publication Date: 2015-08-05
FUJITSU LTD
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Problems solved by technology

[0002] 3GPP's next-generation wireless communication system Long Term Evolution-Advanced (LTE-A, Long Term Evolution-Advanced) requires the downlink to provide a peak rate of 1Gps and a peak spectral efficiency of 30bps / Hz, which brings challenges to the system's physical layer transmission scheme
When the system works at low signal-to-noise ratio, it will seriously affect the system performance

Method used

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  • Spatial channel state feedback method and device
  • Spatial channel state feedback method and device
  • Spatial channel state feedback method and device

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Embodiment Construction

[0055] Embodiments of the present invention will be described below with reference to the drawings. Elements and features described in one drawing or one embodiment of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that representation and description of components and processes that are not related to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions for the purpose of clarity.

[0056] According to the space channel state feedback method and device of the present invention, the possibility of the space channel being scheduled is determined first, then the feedback information is determined according to the possibility of the space channel being scheduled, and finally the determined feedback information is sent. Among them, more feedback information is used for spatial channels with a high possibility of being scheduled tha...

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Abstract

A method for feeding back spatial channel state and a device for feeding back spatial channel state are disclosed by the invention. The method for feeding back spatial channel state according to an embodiment of the present invention includes: determining the probability of being scheduled of the spatial channel; determining feedback information based on the probability of being scheduled of the spatial channel; and transmitting the determined feedback information; wherein more feedback information is used for the spatial channel having high probability of being scheduled than that of the spatial channel with low probability of being scheduled.

Description

technical field [0001] The present invention generally relates to the transmission technology in the communication system, and more specifically, the present invention relates to a spatial channel state feedback method and its device. Background technique [0002] 3GPP's next-generation wireless communication system Long Term Evolution-Advanced (LTE-A, Long Term Evolution-Advanced) requires the downlink to provide a peak rate of 1Gps and a peak spectral efficiency of 30bps / Hz, which brings challenges to the system physical layer transmission scheme . A Multiple Input Multiple Output (MIMO, Multiple Input Multiple Output) communication system multiplexes channels in space to improve the spectrum efficiency of the system. However, using only single-user MIMO technology cannot meet the requirements of the International Telecommunication Union (ITU) in any test scenario, which requires a more advanced technology in the physical layer. A multiple-user multiple-input multiple-ou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04
CPCH04B7/0632H04B7/0452H04B7/0639H04B7/0626H04B7/0619
Inventor 张翼张元涛周华田军吴建明
Owner FUJITSU LTD
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