Automatic mismatch calibration circuit and method and radio frequency receiver

A calibration circuit and automatic technology, applied in the fields of electrical components, multi-frequency modulation and transformation, advanced technology, etc., can solve the problem of not being able to improve the received signal-to-noise ratio, and achieve the effect of improving the received signal-to-noise ratio

Active Publication Date: 2020-12-25
南京英锐创电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to address the problem that the existing quadrature mismatch compensation adopts the post-compensation method, which cannot improve the receiving signal-to-noise ratio, and provides an automatic mismatch calibration circuit, method and radio frequency receiver

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  • Automatic mismatch calibration circuit and method and radio frequency receiver
  • Automatic mismatch calibration circuit and method and radio frequency receiver
  • Automatic mismatch calibration circuit and method and radio frequency receiver

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Embodiment Construction

[0042] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0043] The serial numbers numbered for components in this document, such as "first", "second", etc., are only used to classify the described objects and do not have any sequence or technical meaning. The "connection" and "connection" mention...

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Abstract

The invention provides an automatic mismatch calibration circuit and method and a radio frequency receiver. The automatic mismatch calibration circuit comprises a first mixer circuit, a second mixer circuit, a processing circuit and a pre-distortion compensation circuit. The first frequency mixing circuit is used for receiving the radio frequency signal and outputting a first alternating current signal according to the radio frequency signal and the first local oscillation signal; the second frequency mixing circuit is used for receiving the radio frequency signal and outputting a second alternating current signal according to the radio frequency signal and a second local oscillator signal. The processing circuit is electrically connected with the first frequency mixing circuit and the second frequency mixing circuit. The processing circuit is used for determining a compensation signal according to the first AC signal and the second AC signal. The compensation signal comprises a phasecompensation signal and / or an amplitude compensation signal. The pre-distortion compensation circuit is electrically connected with the processing circuit, the first frequency mixing circuit and the second frequency mixing circuit. The pre-distortion compensation circuit is used for respectively adjusting the output first local oscillation signal and the output second local oscillation signal according to the compensation signal.

Description

technical field [0001] The present application relates to the technical field of wireless communication, in particular to an automatic mismatch calibration circuit, method and radio frequency receiver. Background technique [0002] In the IoT receiver, there are usually various circuit mismatches, including the DC offset (DC offset) and quadrature mismatch (IQ mismatch) of the IQ two channels. These mismatches will affect the receiving signal-to-noise ratio of the receiver, and then affect the demodulation performance of the receiver. In current mainstream receiver systems, the mismatch of these radio frequency circuits will be calibrated to improve the demodulation performance of the receiver. However, different calibration methods achieve different calibration effects, and the power consumption is also quite different. [0003] At present, the general quadrature mismatch compensation is implemented after the ADC, which is post-compensation. Since the distortion of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/12H04B1/16H03D7/16
CPCH04B1/123H04B1/16H03D7/16Y02D30/70
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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