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Implementation method of fast frequency measurement and tracking output device based on costas loop

An implementation method and technology of an output device, applied in the field of wireless information transmission, can solve the problems of small frequency measurement bandwidth, low frequency measurement accuracy of radar signals, etc., achieve fast frequency measurement, meet real-time sampling requirements, and solve the effects of spectrum aliasing

Active Publication Date: 2020-08-28
CHENGDU SHIYUAN FREQUENCY CONTROL TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for implementing a fast frequency measurement and tracking output device based on the Costas ring, which mainly solves the problems of low frequency measurement accuracy of radar signals and small frequency measurement bandwidth in the prior art.

Method used

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  • Implementation method of fast frequency measurement and tracking output device based on costas loop
  • Implementation method of fast frequency measurement and tracking output device based on costas loop
  • Implementation method of fast frequency measurement and tracking output device based on costas loop

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Embodiment

[0046] Such as Figure 1 to Figure 3 As shown, the present invention provides a method for realizing a fast frequency measurement and tracking output device based on the Costas ring, realizes fast and high-precision bandwidth signal frequency measurement, reduces input and output frequency deviation, ensures radar intermediate frequency signal output, and reduces radar signal loss. phase noise. The device includes an analog gain control module, a 100MHz AD acquisition module, an FPGA gain control module and a tracking filter output module connected in sequence. Wherein, the FPGA gain control module includes a digital gain module connected with the AD acquisition module, a four-way parallel Costas ring connected with the digital gain module, a comparison judgment module connected with the Costas ring, and a DDS connected with the comparison judgment module A signal generator, the DDS signal generator is connected to the tracking filter output module. The tracking filter outpu...

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Abstract

The invention discloses a realization method of a rapid frequency measurement and tracking output device based on a Costas ring; the method comprises the following steps: using an undersampled mode togather intermediate frequency signals, and converting same into data signals; making statistics of the digital signals; carrying out gaining decoding for power so as to solve a gain control parameter; carrying gaining treatment for the inputted radar intermediate frequency signals; forming a power control sign; setting a local oscillator frequency of the Costas ring; extracting the power controlsign, converting the digital signal into a base band, and solving an error voltage of the base band; capturing a base band signal; forming a corresponding frequency control word and a loop error according to the error voltage; determining and outputting a locking signal; determining the validity of the locking signal and transmitting the frequency control word; enabling a DDS signal generator to form a digit frequency synthesis signal, enabling a DA conversion module to convert the digit frequency synthesis signal into a simulation signal, and using a band pass filter to output an intermediatefrequency signal with the needed bandwidth. The rapid frequency measurement and tracking output device is simple in structure, accurate in measurement, reliable in tracking, and excellent in expansibility.

Description

technical field [0001] The invention relates to the technical field of wireless information transmission, in particular to a method for realizing a fast frequency measurement and tracking output device based on a Costas ring. Background technique [0002] Radar systems are used to detect the presence of targets and to measure the position and displacement of targets. Typically, radar systems are designed to: measure range within a specific range, measure range within a specific scan area, test range with a specific accuracy, and for a specific Direction measures distance. Electromagnetic radiation is generated by the radar antenna to detect the position and displacement of the target. With the continuous development of radar technology, high speed and high bandwidth are the inevitable trend of wireless information transmission. When the antenna of the radar system transmits the radar signal, due to the Doppler effect, the radar signal is prone to frequency deviation. At th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/285G01S7/34G01S7/35
CPCG01S7/285G01S7/34G01S7/352
Inventor 夏春城
Owner CHENGDU SHIYUAN FREQUENCY CONTROL TECH
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