Dynamic target signal simulation method in transparent mode

A dynamic target and transparent mode technology, applied in the direction of radio wave reflection/re-radiation, utilization of re-radiation, measuring devices, etc., to achieve the effect of simplicity, complete functions and simple operation

Active Publication Date: 2012-01-04
10TH RES INST OF CETC
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  • Application Information

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Problems solved by technology

Existing static or quasi-dynamic simulation sources cannot realize the above functions, which brings a lot of inconvenience to the development and use

Method used

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  • Dynamic target signal simulation method in transparent mode
  • Dynamic target signal simulation method in transparent mode
  • Dynamic target signal simulation method in transparent mode

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Embodiment Construction

[0016] The present invention is further illustrated below by way of examples. In the following examples, according to figure 1 For the timing diagram of storage read and write control, in the programmable gate array chip FPGA external memory group M, the intermediate frequency signal received by the dynamic target signal simulator in transparent mode is directly stored after passing through the analog-to-digital converter (A / D). The delay is performed in the memory bank M as a range delay with a clock f with the corresponding Doppler frequency R Read out the data in the memory bank M, and output it through the digital-to-analog converter (D / A), and carry out distance speed simulation;

[0017] The monitoring and processing computer inputs orbit parameters, and the DSP calculates the time delay and amplitude attenuation value according to the distance in the monitoring and processing computer input orbit parameters, and performs target distance simulation;

[0018] DSP calcul...

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Abstract

The invention provides a dynamic target signal simulation method in a transparent mode, and aims to provide a dynamic target signal simulation method which is low in consumption of hardware resources and can perform long-distance and high-precision simulation in the transparent mode. The method comprises the following steps of: (1) plugging a memory bank M in a field programmable gate array (FPGA) chip, directly storing an intermediate-frequency signal received by a dynamic target signal simulator in the transparent mode in the memory bank M used for distance delay through an analog-to-digital (A / D) convertor for delay, reading data in the memory bank M by using a clock fR with Doppler frequency corresponding to speed parameters, outputting the data by using a digital-to-analog (D / A) convertor, and performing distance and speed simulation; (2) inputting rail parameters by using a monitoring and processing computer, calculating the size of time delay and an amplitude fading value according to distances, and simulating target distances; and (3) adding the Doppler frequency corresponding to speed in the rail parameters to a data reading clock, and making the read data added with corresponding Doppler frequency to form a dynamic target signal.

Description

technical field [0001] The invention relates to a method for processing intermediate frequency signals when simulating dynamic target signals in the field of measurement and control. Background technique [0002] In the prior art, the simulation of target signals such as distance, speed, acceleration, etc. is realized by simulating the time delay and amplitude change of the echo signal. Generally, the distance measurement of the continuous wave measurement and control signal is realized by phase measurement. When the distance of the target changes, the phase of the received echo will also change, and the corresponding echo Doppler frequency shift will be generated. d , and the phase difference between the corresponding sending and receiving signals is Changes continuously over time, that is, the distance changes over time. At the same time, the simulation of velocity and acceleration is also realized through Doppler frequency shift and its rate of change. However, the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40G01S13/36
Inventor 兰宏志
Owner 10TH RES INST OF CETC
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