Method and system of 60 GHz beam forming based on double-layer circular array

A beamforming method and circular antenna technology, applied in the field of communication, can solve problems such as large gain loss, unclear direction, and excessive path loss

Inactive Publication Date: 2013-04-24
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The 60GHz mmWave bandwidth is large and flexible, but the biggest challenge it faces is the high path loss
[0025] 3. The vertical axis coverage of the three-dimensional ant

Method used

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  • Method and system of 60 GHz beam forming based on double-layer circular array
  • Method and system of 60 GHz beam forming based on double-layer circular array
  • Method and system of 60 GHz beam forming based on double-layer circular array

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Embodiment 1

[0076] In order to solve the above-mentioned problems, the first embodiment provides a 60 GHz beamforming method based on a double-layer circular antenna array, wherein the beamforming method of the circular antenna array includes: codebook design and training steps.

[0077] In this embodiment, the number of inner loop antenna elements M=8, and the relationship between the radius of the inner loop antenna array and the wavelength is r 1 =λ / 2=2.5mm; the number of outer ring antenna elements N is an integral multiple of 8 (greater than 8), the relationship between the radius of the outer ring antenna array and the wavelength is r 2 / λ=N / 16, the number of outer ring antennas is selected as 16.

[0078] (1) Codebook design

[0079] The circular antenna array beamforming codebook proposed in the present invention corresponds to three modes, namely Quasi-omni mode, Sector mode and Beam mode.

[0080] The following three codebook designs are based on the circular antenna array array factor ...

Embodiment 2

[0149] In order to achieve the above objective, the second embodiment of the present invention also provides a 60GHz beamforming system based on a double-layer circular antenna array, such as Figure 14 As shown, the system includes:

[0150] Circular antenna array factor unit 1401, Quasi-omni codebook design unit 1402, Sector codebook design unit 1403, and Beam codebook design unit 1404.

[0151] Circular antenna array factor unit 1401, according to the expression of circular antenna array factor A ( θ ) = X m = 0 M - 1 W m e j 2 π λ r 1 cos ( θ - 2 πm M ) or A ( θ ) = X n = 0 N - 1 W n e j 2 π λ r 2 cos ( θ - 2 πn N )

[0152] The antenna weight vector of the circular antenna array is cyclically moved by one position, the beam pattern is rotated by 2π / M or 2π / N, and the shape remains unchanged, where M is the ...

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Abstract

The invention discloses a method and a system of 60 GHz beam forming based on a double-layer circular array. The method of the beam forming comprises codebook designing and training steps. All Quasi-omni modes are obtained by carrying out Quasi-omni codebook designing. An optimum Quasi-omni pair is obtained by matching one by one. Sector codebook designing and corresponding training steps are carried out in the range of the optimum Quasi-omni pair to obtain an optimum Sector pair. Sector codebook designing and corresponding training steps are carried out in the range of the optimum Sector pair to obtain an optimum Beam pair. The three modes are enabled to generate corresponding codebooks, an antenna pattern is enabled to be same in sizes, even in distribution, clear in directing, and an antenna beam with high precision, high gain and small gain loss is searched in a short time, the robustness of relevant phase shifting errors of the circular array codebooks is strong, and the system is stable.

Description

Technical field [0001] The present invention relates to the field of communication technology, in particular to a 60 GHz beamforming method and system based on a double-layer circular antenna array. Background technique [0002] In 2003, the IEEE released a new standard IEEE 802.15.3, "WPAN's Wireless Media Access Control (MAC) and Physical Layer (PHY) Specification", which first proposed the wireless communication that realizes Gigabit rate transmission in a short distance range. system. In order to achieve a transmission rate exceeding 5Gbps in the 60GHz frequency band, the IEEE 802.15.3c standard in 2009 made further supplementary improvements to the IEEE 802.15.3 standard. The standard defines three physical layer modes and defines one The purpose of the new beamforming protocol is to increase the transmission range of the system. [0003] The 60GHz millimeter wave short-range wireless communication technology has shown great potential in today's shortage of spectrum resource...

Claims

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Application Information

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IPC IPC(8): H04B7/06
Inventor 冯薇肖振宇苏厉金德鹏曾烈光
Owner TSINGHUA UNIV
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