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KR-102962518-B1 - METHOD AND APPARATUS FOR CONTROLLING POLARIZATION AND BEAMFORMING USING QUANTITATIVE POLARIZATION CONTROL TECHNIQUE

KR102962518B1KR 102962518 B1KR102962518 B1KR 102962518B1KR-102962518-B1

Abstract

The present specification describes a transmitter that controls polarization and beamforming using a quantitative polarization control technique, wherein one channel of the transmitter may include an input unit that acquires an input signal, a power splitter that distributes the input signal into a horizontal polarization path and a vertical polarization path, a digital control unit that controls the phase and gain of the horizontal polarization path and the vertical polarization path, and a dual polarization antenna that radiates the signal acquired through each of the horizontal polarization path and the vertical polarization path.

Inventors

  • 장태환
  • 이제환

Assignees

  • 한양대학교 에리카산학협력단

Dates

Publication Date
20260507
Application Date
20230619

Claims (20)

  1. In a transmitter that controls polarization and beamforming using a quantitative polarization control technique, One channel of the above transmitter is, Input unit for acquiring an input signal; A power splitter that distributes the above input signal into a horizontal polarization path and a vertical polarization path; A digital control unit that controls the phase and gain of the horizontal polarization path and the vertical polarization path; and It includes a dual-polarization antenna that radiates signals obtained through each of the horizontal polarization path and the vertical polarization path, and The above digital control unit includes a phase control unit that controls the phase of a signal and a gain control unit that controls the gain of a signal, and The above phase control unit controls the phase of the signal by controlling phase shifters located in each of the horizontal polarization path and the vertical polarization path, and The gain control unit controls the gain of the signal by controlling variable gain amplifiers located in each of the horizontal polarization path and the vertical polarization path, and A polarization mode is determined in the one channel based on the phase of the signal and the gain of the signal, A transmitter in which the phase and gain of the above signal are each controlled by a digital control signal.
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  5. In Article 1, A transmitter in which the gain of the radiated signal is set to be the same regardless of the polarization mode determined based on the phase of the signal and the gain of the signal, each controlled by the digital control signal.
  6. In Article 1, The above variable gain amplifier includes a dummy transistor section, a variable common gate stage, and a common source stage, wherein The source terminal of the dummy transistor section and the source terminal of the variable common gate are connected to the drain of the common source terminal, and A transmitter in which the drain of a variable common gate is connected to the signal output terminal of a variable gain amplifier.
  7. In Article 6, The above dummy transistor section and the above variable common gate include at least one field-effect transistor having a channel width W based on the same structure, and A transmitter in which each of the at least one field-effect transistors of the dummy transistor section is turned on and turned off based on a digital control signal.
  8. In Article 7, When N field-effect transistors are included in the dummy transistor section, based on each field-effect transistor that is turned on and turned off based on the digital control signal A transmitter in which the operation of a variable gain amplifier is determined.
  9. In Article 1, The above transmitter includes a plurality of channels, and A transmitter in which the beam direction of a radiated signal is determined based on the merging of signals radiated from each of the plurality of channels.
  10. In a receiver that controls polarization and beamforming using a quantitative polarization control technique, One channel of the above receiver is, A dual-polarization antenna that receives a signal radiated through a wireless channel and transmits it to a horizontal polarization path and a vertical polarization path; A digital control unit that controls the phase and gain of the above horizontal polarization path and the above vertical polarization path; A power splitter that restores a signal based on a signal obtained through the above horizontal polarization path and the above vertical polarization path; and It includes an output unit that outputs a signal transmitted through the power divider above, and The above digital control unit includes a phase control unit that controls the phase of a signal and a gain control unit that controls the gain of a signal, and The above phase control unit controls the phase of the signal by controlling phase shifters located in each of the horizontal polarization path and the vertical polarization path, and The gain control unit controls the gain of the signal by controlling variable gain amplifiers located in each of the horizontal polarization path and the vertical polarization path, and The phase and gain of the signal are controlled based on the polarization mode determined in the above-mentioned channel, wherein A receiver in which the phase of the above signal and the gain of the above signal are each controlled by a digital control signal.
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  14. In Article 10, The above dual-polarization antenna is a receiver that receives a radiated signal having the same gain regardless of the determined polarization mode.
  15. In Article 10, The above variable gain amplifier includes a dummy transistor section, a variable common gate stage, and a common source stage, wherein The source terminal of the dummy transistor section and the source terminal of the variable common gate are connected to the drain of the common source terminal, and A receiver in which the drain of a variable common gate is connected to the signal output terminal of a variable gain amplifier.
  16. In Article 15, The above dummy transistor section and the above variable common gate include at least one field-effect transistor having a channel width W based on the same structure, and A receiver in which each of the at least one field-effect transistor of the dummy transistor section is turned on and turned off based on a digital control signal.
  17. In Article 16, When N field-effect transistors are included in the dummy transistor section, based on each field-effect transistor that is turned on and turned off based on the digital control signal A receiver in which the operation of a variable gain amplifier is determined.
  18. In Article 10, The above receiver includes a plurality of channels, and A receiver that receives a signal in a specific beam direction via a wireless channel based on each of the above plurality of channels.
  19. In a method for controlling polarization and beamforming using a quantitative polarization control technique, Step of acquiring an input signal; A step of transmitting the above input signal to a dual-polarized antenna through a horizontal polarization path and a vertical polarization path; and The method includes the step of radiating a signal based on the above-mentioned dual-polarized antenna, In each of the above horizontal polarization path and the above vertical polarization path, the phase of the signal and the gain of the signal are each independently controlled by a phase shifter and a variable gain amplifier, and A polarization mode is determined in one channel based on the phase of the above signal and the gain of the above signal, A polarization and beamforming control method in which the phase of the signal and the gain of the signal are each controlled by a digital control signal.
  20. In a method for controlling polarization and beamforming using a quantitative polarization control technique, A step of receiving a signal through a dual-polarized antenna; The step of transmitting the received signal to a power distributor through a horizontal polarization path and a vertical polarization path, respectively; and The method includes the step of restoring and transmitting an output signal based on the above-mentioned power divider, In each of the above horizontal polarization path and the above vertical polarization path, the phase of the signal and the gain of the signal are each independently controlled by a phase shifter and a variable gain amplifier, and The phase and gain of the signal are controlled based on a polarization mode determined in one channel, A polarization and beamforming control method in which the phase of the signal and the gain of the signal are each controlled by a digital control signal.

Description

Method and apparatus for controlling polarization and beamforming using quantitative polarization control technique This specification relates to a method and apparatus for controlling polarization and beamforming using a quantitative polarization control technique. Specifically, it relates to a method and apparatus for independently controlling the amplitude and polarization mode of radiated waves and controlling the beamforming mode through multiple channels using a quantitative polarization control technique. As many communication devices in next-generation mobile communication systems require large communication capacity, various technologies are being proposed to satisfy the requirements for enhanced mobile broadband (eMBB) services, massive Machine Type Communications (mmTC) services, and Ultra-Reliable and Low Latency Communications (URLLC) services, which are enhanced services compared to existing radio access technology (RAT). Considering the aforementioned requirements, it may be necessary to control polarization and beamforming signals to enhance signal transmission efficiency. However, in conventional fixed antenna systems, controlling polarization may not allow for adjustment of radiated power, and performance degradation has occurred due to non-uniformity caused by varying power levels across different polarization modes. The following describes a method to address this issue. FIG. 1 is a diagram illustrating a network environment to which the present disclosure applies. FIG. 2 is a drawing showing the configuration of a device applicable to the present disclosure. FIG. 3 is a diagram showing a transmission circuit configuration to which a quantitative polarization control technique applicable to the present disclosure is applied. FIG. 4 is a diagram showing a receiving circuit configuration to which a quantitative polarization control technique applicable to the present disclosure is applied. FIG. 5 is a diagram showing a VGA circuit structure applicable to the present disclosure. FIG. 6 is a diagram showing a VGA circuit structure capable of digital bias control applicable to the present disclosure. FIG. 7 is a diagram showing the S21 parameter characteristics according to gain mode conversion during VGA operation applicable to the present disclosure. FIG. 8 is a diagram illustrating a method for performing beamforming operations through a multi-channel antenna array applicable to the present disclosure. FIG. 9 is a diagram showing a comparison of existing techniques and quantitative polarization control techniques applicable to the present disclosure. FIG. 10 is a flowchart illustrating a method of transmitting a signal using a quantitative polarization control technique applicable to the present disclosure. FIG. 11 is a flowchart illustrating a method of receiving a signal using a quantitative polarization control technique applicable to the present disclosure. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. The detailed description disclosed below, together with the accompanying drawings, is intended to describe exemplary embodiments of the present invention and is not intended to represent the only embodiment in which the present invention may be practiced. The following detailed description includes specific details to provide a complete understanding of the present invention. However, those skilled in the art will know that the present invention may be practiced without such specific details. The following embodiments combine the components and features of the present invention in a predetermined form. Each component or feature may be considered optional unless otherwise explicitly stated. Each component or feature may be implemented in a form not combined with other components or features. Additionally, embodiments of the present invention may be constructed by combining some components and/or features. The order of operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment, or may be replaced with corresponding components or features of another embodiment. Specific terms used in the following description are provided to aid in understanding the present invention, and the use of such specific terms may be modified in other forms without departing from the technical spirit of the present invention. In some cases, to avoid obscuring the concept of the present invention, known structures and devices are omitted or are illustrated in the form of block diagrams focusing on the core functions of each structure and device. Additionally, throughout this specification, the same components are described using the same reference numerals. Additionally, terms such as "first" and/or "second" may be used in this specification to describe various components, but said components should not be limited by