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Mapping method for beam forming dedicated pilot and physical resource block

A technology of physical resource blocks and dedicated pilots, which is applied in the field of mapping of beamforming dedicated pilots and physical resource blocks, can solve the problems of small overhead and the inability of public pilots to obtain all channel information, and achieve the effect of avoiding feedback overhead

Inactive Publication Date: 2012-10-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Considering that in the existing version of the LTE standard in the related art, when the base station uses beamforming with more than 4 antennas, the common pilot cannot obtain all channel information, and there is a problem of feedback overhead of beamforming weights. The present invention is proposed. For this reason, the present invention aims to provide a method for mapping beamforming dedicated pilots and physical resource blocks. By specifying the position of the pilot symbols in the physical resource blocks, the existing LTE version is used according to this In the design of the dedicated pilot in the embodiment of the invention, beamforming can be supported with less overhead and better performance

Method used

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  • Mapping method for beam forming dedicated pilot and physical resource block
  • Mapping method for beam forming dedicated pilot and physical resource block
  • Mapping method for beam forming dedicated pilot and physical resource block

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Embodiment 1

[0033] According to an embodiment of the present invention, a method for mapping beamforming dedicated pilots and physical resource blocks is provided, which can be used in a frame structure using a normal cyclic prefix in an LTE system (RB contains 12 subcarriers in the frequency domain, and in the time domain domain contains the mapping of beamforming-specific pilots and physical resource blocks in 14 OFDM symbols).

[0034] Such as figure 2 As shown, the method includes the following processing (step S202-step S208):

[0035] Step S202, frequency domain interval setting processing, for beamforming dedicated pilots mapped to the same time domain, set the frequency domain interval to 5 subcarriers;

[0036] Step S204, time domain interval setting processing, for beamforming dedicated pilots mapped to different time domains, set the time domain interval to 3 OFDM symbols;

[0037] Step S206, initial mapping processing, mapping the first dedicated beamforming pilot to an ini...

Embodiment 2

[0068] According to an embodiment of the present invention, a method for mapping beamforming dedicated pilots and physical resource blocks is provided, which can be used in a frame structure using a long cyclic prefix in a long term evolution system (wherein, an RB contains 12 subcarriers in the frequency domain , which contains 12 OFDM symbols in the time domain) mapping of beamforming dedicated pilots and physical resource blocks.

[0069] Such as image 3 As shown, the method includes the following processing (step S302-step S304):

[0070] Step S302, frequency domain interval setting processing, for beamforming dedicated pilots mapped to the same time domain, set the frequency domain interval to 5 subcarriers;

[0071] Step S304, time domain interval setting processing, for beamforming dedicated pilots mapped to different time domains, set the time domain interval to 2 or 3 OFDM symbols;

[0072]Step S306, initial mapping processing, mapping the first dedicated beamformi...

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Abstract

Mapping methods for beam forming dedicated pilot and physical resource block are respectively used for mapping of beam forming dedicated pilot and physical resource block in long term evolution. One of the methods includes the steps of: frequency domain interval set processing, setting the frequency domain interval of the beam forming dedicated pilot which is mapped to the same time domain as 5 sub- carriers(S202); time domain interval set process, setting the time domain interval of the beam forming dedicated pilot which is mapped to different time domains as 3 OFDM symbols(S204); initial mapping processing, mapping the first beam forming dedicated pilot to the initial position, therein, A and B represent the initial position, A represents frequency domain initial position, and B represents time domain initial position(S206); carrying out mapping processing of other beam forming dedicated pilots according to the initial position, frequency domain interval, time domain interval and preset rules of the first beam forming dedicated pilot(S208).

Description

technical field [0001] The present invention relates to a mapping method of a dedicated pilot and a physical resource block in a long term evolution system (LTE for short) in the field of mobile communication, in particular, relates to a mapping method of a beamforming dedicated pilot and a physical resource block. Background technique [0002] In the current version of the LTE (Long term evolution, long-term evolution system) standard 3GPP (3rdGeneration partnership project, third generation mobile communication partnership project) TR 36.211, the beamforming technology supporting single stream is stipulated. Coding also clarifies the condition that beamforming is applied to the number of antennas greater than or equal to four. However, only four common pilots are defined in the current version of the LTE standard, so only four common pilots are used in practice, and the channel information of each antenna port is extracted from the corresponding common pilot. Therefore, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L5/0007H04L5/0048
Inventor 姜静孙云锋李峰毕峰
Owner ZTE CORP
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