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Mismatch calibration circuit, method, system and radio frequency system

A technology for calibrating circuits and circuits, applied in the direction of transmitter monitoring, etc., can solve problems such as the amplitude of the error vector of the transmitted signal affecting the transmitter, affecting the transmitting performance of the transmitter, etc., and achieve the effect of improving the quality of the transmitted signal

Active Publication Date: 2020-11-13
南京英锐创电子科技有限公司
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AI Technical Summary

Problems solved by technology

These mismatches will affect the transmitter's transmit signal error vector magnitude (Error Vector Magnitude, referred to as "EVM", error vector magnitude), and then affect the transmitter's transmission performance

Method used

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  • Mismatch calibration circuit, method, system and radio frequency system
  • Mismatch calibration circuit, method, system and radio frequency system
  • Mismatch calibration circuit, method, system and radio frequency system

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Embodiment Construction

[0032] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. In the description of the present application, the terms "first", "second" and the like are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0033] Such as figure 1 As shown, this embodiment provides a radio frequency system 1 , including: a mismatch calibration circuit 10 , a transmitter 20 and a receiver 30 . in:

[0034] In the actual working scene of the radio frequency system 1, the transmitter 20 can generate a transmission signal according to the baseband signal, and transmit the transmission signal. The transmission signal can be a radio frequency signal, and the receiver 30 can receive the corresponding radio frequency signal, thereby realizing The communication process between the machine 20 and the receiver 30.

[0035] ...

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Abstract

The invention provides a mismatch calibration circuit, method and system and a radio frequency system, and the mismatch calibration circuit comprises: a frequency conversion module which is used for being connected with a transmitter of a communication system, carrying out the frequency conversion of a transmitting signal generated by the transmitter to a baseband, and outputting the mismatch information in the transmitting signal; a calculation module which is connected with the frequency conversion module and is used for receiving the mismatch information and calculating compensation information corresponding to the transmitting signal based on the mismatch information; and a compensation module, wherein one end of the compensation module is connected with the calculation module, and theother end of the compensation module is used for being connected with the input end of the transmitter, receiving the compensation information and compensating the compensation information to a signal channel where a baseband signal of the transmitter is located. The mismatch information of the transmitter is automatically estimated and compensated, the distortion of the transmitter is automatically calibrated, the transmitting signal quality of the radio frequency transmitter is improved, and manual intervention is not needed, so that the test time and the test cost are greatly saved.

Description

technical field [0001] The present application relates to the technical field of electronic circuits, in particular, to a mismatch calibration circuit, method, system and radio frequency system. Background technique [0002] Radio frequency (RF for short) refers to the electromagnetic frequency that can radiate into space, and the frequency range is from 300kHz to 300GHz. It is an abbreviation of high-frequency alternating electromagnetic wave. Radio frequency technology is widely used in the field of communication. [0003] In the radio frequency transmitter of the communication system, there are generally various circuit mismatches, such as the DC offset (DCoffset) of the transmitter, the quadrature mismatch (IQ mismatch) and the nonlinear distortion of the power amplifier. These mismatches will affect the transmission signal error vector magnitude (Error Vector Magnitude, “EVM” for short, error vector magnitude) of the transmitter, and then affect the transmission perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/11
CPCH04B17/11
Inventor 熊廷文李曙光徐红如彭仁国
Owner 南京英锐创电子科技有限公司
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