Method for simulating dynamic target signals with high accuracy

A dynamic target, high-precision technology, used in radio wave measurement systems, instruments, etc., to achieve the effect of convenient and flexible application and guaranteed accuracy

Active Publication Date: 2010-09-08
10TH RES INST OF CETC
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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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  • Method for simulating dynamic target signals with high accuracy
  • Method for simulating dynamic target signals with high accuracy
  • Method for simulating dynamic target signals with high accuracy

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Embodiment Construction

[0022] The present invention is further illustrated below by way of examples. In the following embodiments, the high-precision dynamic target signal simulator receives the radio measurement and control signal sent by the measurement and control system, performs carrier demodulation on the intermediate frequency to obtain the ranging sound, and the ranging sound is stored in a memory group composed of multiple dual-port RAMs . Because there is a delay between reading and writing data in the memory bank, and the delay can be controlled according to different address selections, there is a delay between reading and writing data in the memory bank, and the memory bank composed of dual-port RAM is used as the simulator to simulate the distance. delay line. According to the maximum simulation distance and the highest simulation accuracy, select the storage capacity and read and write clock of the memory bank.

[0023] Calculate the delay and output amplitude from the distance data...

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Abstract

The invention provides a method for simulating dynamic target signals with high accuracy, aiming to provide a treatment method which has little hardware resource consumption and can carry out remote and high-accuracy dynamic simulation. In the method, distance measurement sounds are obtained by carrying carrier demodulation on received intermediate frequency signals and are stored in a memory group used as distance delay, a Doppler frequency corresponding to speed in track parameters is added on a data reading clock to carry out asynchronous data reading and writing, a double-port RAM (RandomAccess Memory) is utilized as a distance delay memory, an extremely remote distance is divided into thick and thin distances by a limited storage space to carry out combination simulation or carry out step simulation based on the requirements of distance and the accuracy; and a sum path direction, a difference path direction and a difference path pitching attenuator are utilized to calculate sum and difference signal amplitude based on angle data and an antenna direction diagram in the rack parameters, calculate the attenuation quantity of the attenuator and respectively control sum path output signal amplitude and difference path output signal amplitude to carry out angle simulation, thereby realizing dynamic simulation with different distances and different accuracy.

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): G01S7/40
Inventor 兰宏志李珂史为民雷鸣
Owner 10TH RES INST OF CETC
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