Public signal transmission method and device in hybrid beamforming technology

A common signal and mixed beam technology, applied in the transmission system, radio transmission system, space transmit diversity and other directions, can solve the problems of public signal coverage impact, to improve effective coverage, combat path loss, improve effective coverage and The effect of robustness

Active Publication Date: 2016-07-20
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For user signals, when hybrid beamforming technology is used, user-specific (UE-specific) beamforming technology can be used to achieve transmission coverage for corresponding users; but for public signals, there is currently no corresponding hybrid beamforming technology. The transmission technology of beamforming technology, so the large transmission loss of high-band spectrum resources will make the coverage of public signals in the hybrid beamforming technology will be greatly affected

Method used

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  • Public signal transmission method and device in hybrid beamforming technology
  • Public signal transmission method and device in hybrid beamforming technology
  • Public signal transmission method and device in hybrid beamforming technology

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Experimental program
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Effect test

Embodiment 1

[0054] figure 1 It is an exemplary flow chart of a common signal transmission method in the hybrid beamforming technology in Embodiment 1 of the present application. Such as figure 1 As shown, the method is applied to the base station side, and may specifically include the following processing procedures:

[0055] Step 101, the base station acquires an analog public signal to be sent.

[0056] In this step, the analog common signal to be sent is a signal obtained after analog-to-digital conversion of the digital common signal.

[0057] figure 2 It is a schematic diagram of an exemplary principle of processing a common signal in a hybrid beamforming technology in Embodiment 1 of the present application. Such as figure 2 As shown, the signal Sa is an analog public signal to be sent.

[0058] Step 102, for different radio frequency chains (RFchain), select different codewords from the analog beamforming codebook as analog beamforming vectors.

[0059] In this step, diffe...

Embodiment 2

[0077] Figure 5 It is an exemplary flowchart of a common signal transmission method in a hybrid beamforming technology in Embodiment 2 of the present application. Such as Figure 5 As shown, the method is applied to the base station side, and may specifically include the following processing procedures:

[0078] Step 501, divide the codewords in the analog beamforming codebook into at least two codeword groups; the number of codewords included in each codeword group is at least one.

[0079] Still taking the case in which the system described in Embodiment 1 is configured with 4 radio frequency chains and the codebook includes 8 codewords as an example, the 8 codewords can be divided into two groups. For example, put a(0), a(π) and Divided into a codeword group, for example, denoted as the first codeword group; and Divided into another codeword group, for example, denoted as the second codeword group.

[0080] Of course, in practical applications, the 8 codewords c...

Embodiment 3

[0102] In this third embodiment, on the basis of any one of the above-mentioned first and second embodiments, processing of digital beamforming for common signals may be added.

[0103] Figure 9a and Figure 9b It is an exemplary flow chart of a common signal transmission method in a hybrid beamforming technology in Embodiment 3 of the present application. This method is applied to the base station side, such as Figure 9a and Figure 9b As shown, the method may include the following processes:

[0104] Step 901, acquire a digital common signal used to generate the analog common signal to be sent.

[0105] Figure 10a and Figure 10b It is a schematic diagram of an exemplary principle of processing a common signal in a hybrid beamforming technology in Embodiment 3 of the present application. Such as Figure 10a and Figure 10b As shown, the signal Sd is the digital common signal, and Sa is the corresponding analog common signal.

[0106] Step 902, for each radio fre...

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Abstract

The invention discloses a public signal transmission method and device in hybrid beamforming technology, wherein the method comprises following steps of obtaining to-be-sent analog public signals; specific to different radio frequency chains, selecting different code words from an analog beamforming codebook as analog beamforming vectors; carrying out analog beamforming on the to-be-sent analog public signals on different radio frequency chains by utilizing the analog beamforming vectors; and sending out the public signal beams on the radio frequency chains after the analog beamforming. According to the technical scheme provided by the invention, the effective range coverage of the public signals in the hybrid beamforming technology can be realized.

Description

technical field [0001] The present application relates to the field of wireless communication technologies, in particular to a public signal transmission method and device in hybrid beamforming multi-user multiple-input multiple-output (Multiple Input Multiple Output, MIMO) technology. Background technique [0002] With the popularization and application of smart terminals and the continuous growth of new mobile service demands, the demand for wireless transmission rates is increasing exponentially. For this reason, when the fourth-generation mobile communication technology (4G) represented by LTE is being popularized and applied, the research and development of the fifth-generation mobile communication technology (5G) has already begun. Compared with 4G, 5G needs to meet several key technical indicators, such as: 1) The transmission rate is increased by 10 to 100 times, the user experience rate can reach 1Gb / s, and the user peak rate can reach 10Gb / s and above; 2) The densi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04
CPCH04B7/0456H04B7/0617H04B7/0671H04B7/0686
Inventor 郤伟侯晓林蒋惠玲
Owner NTT DOCOMO INC
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