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Phase shifter phase calibration circuit and calibration method thereof

A phase calibration and phase shifter technology, applied in the field of communication, can solve the problems of high system overhead and complex phase control system, and achieve the effect of reducing the calibration time and the change time.

Active Publication Date: 2022-07-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a phase shifter phase calibration circuit and its calibration method, which mainly solves the problem that the phase control system of the existing phase shifter circuit is complex, resulting in large system overhead

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  • Phase shifter phase calibration circuit and calibration method thereof
  • Phase shifter phase calibration circuit and calibration method thereof
  • Phase shifter phase calibration circuit and calibration method thereof

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Embodiment

[0036] In order to realize the linear relationship between the output phase of the phase shifter circuit and the control code, and realize the calibration of the output phase of the phase shifter circuit, the invention proposes a phase shifter phase calibration circuit. like figure 1 As shown, it mainly includes a phase shifter circuit, a phase detection circuit and a control code generation circuit. After the signal is input, the initial phase shift is generated by the phase shifter circuit, and the signal is sampled at the output port and fed back to the phase detection circuit. The phase detection circuit detects the phase state of the output phase, discriminates the difference with the ideal phase, and feeds back the information to the control code generation circuit. The control code generation circuit adjusts the control code according to the feedback signal, and corrects the output phase of the phase shifter to an ideal phase. Compared with the digital predistortion s...

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Abstract

The invention discloses a phase shifter phase calibration circuit and a calibration method thereof, and mainly solves the problem of high extra overhead of a system caused by a complex phase control system of an existing phase shifter circuit. The calibration circuit comprises a phase shifter circuit, a phase detection circuit and a control code generation circuit, wherein the phase detection circuit is used for carrying out signal sampling on an output port of the phase shifter circuit, carrying out detection and judgment on a phase and generating a feedback signal; and the control code generation circuit is used for receiving the feedback signal of the phase detection circuit and adjusting a control code to the phase shifter circuit. Compared with a digital pre-distortion scheme, a phase shifter circuit does not need to be tested, and complicated storage circuits such as a lookup table and the like are also not needed; compared with a phase compensation scheme, signal feedback and phase detection are realized on a chip, and an additional phase compensation circuit is not needed. Therefore, the method is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a phase shifter phase calibration circuit and a calibration method thereof. Background technique [0002] With the development of modern communication technology, the requirements for communication efficiency are getting higher and higher. In order to achieve faster and more accurate data transmission, multiple-input multiple-output (MIMO) technology and phased array (Phased Array) technology are mostly used in communication systems. Phase shifters with high precision phase control are a key part of MIMO, Phased Array technology. In the existing phase shifter circuit, due to the nonlinearity of MOS devices and the influence of parasitic parameters, there will be a nonlinear relationship between the output phase of the circuit and the phase-shift control code. Therefore, in system applications such as MIMO and Phased Array, it is necessary to use digital pre-di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H11/16H03K5/156
CPCH03H11/16H03K5/156Y02D30/70
Inventor 周杰钱慧珍罗讯
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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