Array antenna analog multi-beam forming method

A technology that simulates multi-beam and array antennas. It is applied in diversity/multi-antenna systems, radio transmission systems, space transmit diversity, etc. It can solve the problems of small array gain and limit the number of access devices, and achieve fast beamforming and low hardware. Complexity, the effect of low computational complexity

Active Publication Date: 2018-06-15
BEIHANG UNIV
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Problems solved by technology

However, in traditional beamforming methods, array antennas under a single radio frequency can only concentrate energy in one direction, resulting in very small array gain in other directions, which limits the number of access devices

Method used

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  • Array antenna analog multi-beam forming method
  • Array antenna analog multi-beam forming method
  • Array antenna analog multi-beam forming method

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Embodiment Construction

[0026] The present invention will be further described below with reference to the accompanying drawings and examples.

[0027] like figure 1 As shown, the base station transmits the radio frequency signal from the array antenna through the phase converter and the power amplifier. The multi-beamforming problem required by the present invention is: in the case of a given direction of the terminal corresponding to the launch angle (Angle of Departure, AoDs), design a beamforming vector w for the array antenna, that is, the weight coefficient vector of each antenna , forming a beam aimed at multiple directions at the same time.

[0028] Denote the total number of antennas as N, adopt a uniform array antenna of half wavelength, w represents the beamforming vector, that is, the weight coefficient vector of each antenna, and the cosine value of the angle of Departure (AoDs) corresponding to the direction of the given user Ω k ,k=1,2,...,K, K is the total number of users; let a( )...

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Abstract

The invention discloses an array antenna analog multi-beam forming method, and belongs to the technical field of array signal processing. Four multi-beam forming methods are provided and are suitablefor high-frequency directional communication and multi-directional detection of phase-controlled radar, which are respectively as follows: (1) when the ratio of beam gain requirements in two directions is given, performing phase-controlled beam forming; (2) when a greatest lower bound in the beam gains in two directions is given, performing phase-controlled beam forming; (3) when the ratio of thebeam gain requirements in the K directions is given, performing joint phase amplitude control beam forming; and (4) when beam gain weight factors in K directions are given, performing phase-controlledbeam forming. The above four methods achieve low-complexity millimeter-wave beam forming under different scene requirements, so that an array antenna in millimeter-wave communication can aim at multiple directions simultaneously and obtain the array gains in multiple directions at the same time so as to meet the simultaneous access of multiple terminal devices.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, and specifically refers to an analog beam forming method for simultaneously performing multiple beam directions in communication and radar. Background technique [0002] Millimeter Wave Communication (Millimeter Wave Communication) is regarded as a key technology of the Fifth Generation Mobile Networks (5G), and its good properties and prospects have attracted extensive attention from academia and industry. On the one hand, the 30GHz-300GHz frequency domain bandwidth of millimeter wave can provide abundant available spectrum resources; on the other hand, millimeter wave has a very narrow beam, which can greatly reduce the size of components, and millimeter wave has excellent Directivity can realize large-scale antenna arrays, and use the antenna array gain for directional communication. [0003] With the advent of the 5G era, the number of mobile terminals has grown rapidly, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0408H04B7/06
CPCH04B7/0408H04B7/0617H04B7/0695
Inventor 张军曹先彬朱立鹏肖振宇吴大鹏
Owner BEIHANG UNIV
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