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Radar echo semi-actually-measured data simulation method

A technology of measured data and radar echo, applied in the field of radar, can solve problems such as complex radar echo information, difficulty in generating radar signals, and difficult mathematical models, and achieve the effect of reducing the cost of research and development and verification

Active Publication Date: 2019-07-05
XIAN UNIV OF POSTS & TELECOMM
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Problems solved by technology

The information contained in the actual radar echo is generally more complex, and it is very difficult to establish an accurate mathematical model for it, and it is difficult to generate radar signals close to the real complex environment

Method used

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  • Radar echo semi-actually-measured data simulation method

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Embodiment Construction

[0049] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0050] The invention proposes a semi-measurement simulation method for radar echo signals based on measured data. Semi-measurement simulation is a simulation method between pure digital simulation and physical simulation, which can embed the designed radar transmission signal into the real radar signal echo.

[0051] The transmission signal of active radar mostly adopts linear frequency modulation (LFM) signal. The expression for the LFM signal in baseband form is as follows:

[0052]

[0053] In the formula:

[0054] t b - pulse duration;

[0055] k=B / t b - FM slope;

[0056] B - the bandwidth of the signal;

[0057] u(t)——unit step signal.

[0058]Whether the measured data is target or clutter, all are echoes of LFM signals, and all contain LFM information. If a new signal is designed, it is ho...

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Abstract

The invention discloses a radar echo semi-actually-measured data simulation method, belonging to the technical field of radars. The semi actual measurement simulation is a simulation method between pure digital simulation and physical simulation, and can implant a designed radar transmitted signal into a real radar signal echo. Take the actually measured radar data with a transmitted signal as anLFM signal as an example, all the actually measured data, whether it is a target or clutter, is echoes of the LFM signal, and contains information of LFM. If a signal is newly designed, the newly designed radar signal is expected to be implanted into the actually measured radar echo to obtain an echo of a new transmitted signal in a complex environment, thereby being beneficial to investigating signal processing and target extraction performance of a radar receiving module under the signal system. The radar echo semi-actually-measured data simulation method can utilize the existing signal actually measured data echo to complete semi-actually-measured radar echo simulation of the newly designed signal.

Description

technical field [0001] The invention belongs to the technical field of radar, and relates to a radar echo semi-measured data simulation method, in particular to a radar echo signal semi-measured simulation method based on measured data. Background technique [0002] Radar is an indispensable electronic perception system in the complex and changeable modern information battlefield and many civilian fields. Radar echoes can be described in the following form: [0003] x(t)=s(t)+n(t)+c(t) [0004] x(t): radar echo; s(t): target echo; n(t): noise signal; c(t): clutter signal [0005] As the basis of radar system demonstration and algorithm research, radar echo signal simulation is often carried out in radar system simulation. Radar echo simulation can test and verify the algorithm of the signal processing system when the radar system is incomplete, and provide data support for the design, analysis and performance evaluation of the modern radar system. The scenarios are not c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/4052
Inventor 黄琼丹
Owner XIAN UNIV OF POSTS & TELECOMM
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