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Multi-channel phase and amplitude correction device and correction method for receiving channel

A technology for receiving channel and amplitude correction, applied in receiver monitoring, radio wave measurement systems, instruments, etc., can solve problems such as low accuracy, time-consuming and labor-intensive correction, performance impact, etc. Correction speed effect

Inactive Publication Date: 2018-03-16
WUHAN BINHU ELECTRONICS
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Problems solved by technology

[0002] Microwave signal receiving channels include analog devices such as high amplifiers, frequency mixers, intermediate amplifiers, and A / D chips. Due to differences in manufacturing processes or electrical performance, different receiving channels inevitably have differences in characteristics, which brings about the amplitude of each channel. The inconsistency of the response and phase response, the difference in the amplitude response and phase response of each channel will cause subsequent signal processing, which will have a great impact on the performance of sidelobe cancellation and digital beamforming (DBF), and the accuracy is low, which in turn affects the signal. target extraction
[0003] The existing method of phase and amplitude correction for different receiving channels is: during manufacture, test each channel step by step, then obtain relevant parameters, and then perform compensation, but for the correction of dozens or even hundreds of receiving channels, Calibration is time-consuming and labor-intensive, and it is not convenient to re-calibrate after the device is repaired

Method used

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  • Multi-channel phase and amplitude correction device and correction method for receiving channel
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  • Multi-channel phase and amplitude correction device and correction method for receiving channel

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Embodiment Construction

[0019] Explanation of terms: NCO (Numerically Controlled Oscillator), which is a coherent oscillator: because the formation and multiplication of two orthogonal coherent oscillator signals are the result of digital operations, their orthogonality can be fully guaranteed, as long as the operation is guaranteed Accuracy is enough.

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Such as figure 1 Said, the receiving channel multi-channel phase and amplitude correction device of the present invention includes a correction module, N receiving channels, and N AD modules, the correction module is connected to the input port of each receiving channel, and the output port of the receiving channel is respectively connected to the AD module, Each receiving channel includes a phase shifter and an attenuator, the AD module collects the signal of the corresponding receiving channel, and the output of the AD module is con...

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Abstract

The invention relates to the field of microwave signal processing, and particularly relates to a multi-channel phase and amplitude correction device and correction method for a receiving channel. According to the scheme of the invention, a standard waveform is generated by a correction module, an AD module acquires a signal and calculates phase and amplitude offsets, and thus the correction of theamplitude and phase of the channel can be performed. The method disclosed by the invention has the advantages of small calculation amount, timing compensation, high accuracy and the like.

Description

technical field [0001] The invention relates to the field of microwave signal processing, in particular to a receiving channel multi-channel phase and amplitude correction device and correction method. Background technique [0002] Microwave signal receiving channels include analog devices such as high amplifiers, frequency mixers, intermediate amplifiers, and A / D chips. Due to differences in manufacturing processes or electrical performance, different receiving channels inevitably have differences in characteristics, which brings about the amplitude of each channel. The inconsistency of the response and phase response, the difference in the amplitude response and phase response of each channel will cause subsequent signal processing, which will have a great impact on the performance of sidelobe cancellation and digital beamforming (DBF), and the accuracy is low, which in turn affects the signal. Extraction of the target. [0003] The existing method of phase and amplitude ...

Claims

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Application Information

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IPC IPC(8): H04B17/21G01S7/40
CPCG01S7/40H04B17/21
Inventor 宋慧张建明沈小川陈钟
Owner WUHAN BINHU ELECTRONICS
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