Denoising processing method for airborne laser sounding received waveform and system thereof

An airborne laser and processing method technology, applied in radio wave measurement system, engine lubrication, electromagnetic wave re-radiation, etc., can solve the problems of poor adaptability, signal resolution reduction, etc., achieve good denoising effect and improve resolution Effect

Active Publication Date: 2019-08-16
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for denoising the receiving waveform of airborne laser sounding, which is used to solve the problem of poor adaptability and p...

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  • Denoising processing method for airborne laser sounding received waveform and system thereof
  • Denoising processing method for airborne laser sounding received waveform and system thereof
  • Denoising processing method for airborne laser sounding received waveform and system thereof

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0041] A kind of denoising processing method of airborne laser sounding receiving waveform of the present invention comprises the following steps:

[0042] 1.1 Estimation of effective length of received waveform

[0043]The effective length of the received waveform refers to the total length of all echo signals (effective signals) generated by the measuring point in the waveform. In order to ensure that the land and water can be measured simultaneously by the ALB system, each recorded waveform contains thousands of samples, and for each frame of waveform, the effective signal only accounts for 0.8%-5% of it. Therefore, determining the effective range and effective length of the received waveform can greatly improve the processing efficiency of the waveform, and shield a large amount of noise for subsequent processing. Jutzi and Stilla (2006) considered that...

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Abstract

The invention relates to a denoising processing method for airborne laser sounding received waveform and system thereof, and the method specifically comprise the following steps: acquiring waveforms to be processed, estimating corresponding water depth to be measured according to the waveforms, and dividing corresponding water depths to be measured into at least deep water and shallow water basedon an estimation result; processing the waveforms corresponding to the deep water depth to be measured by a mean square difference function method, and processing the waveforms corresponding to the shallow water depth to be measured by a Richardson-Lossian deconvolution method. The method provided by the invention calculates the effective length of the received waveform and is used for approximateestimation of water depth; and then different preprocessing modes are adopted for the received waveform according to the water depth approximate value, so that the preprocessing is more targeted, andthe processing result and the denoising effect are better.

Description

technical field [0001] The invention relates to a denoising processing method and system for airborne laser sounding received waveforms, belonging to the technical field of airborne laser sounding. Background technique [0002] Bathymetry is of great significance to the management and development of rivers, lakes and oceans. Sonar sounding is the mainstream sounding method at present, but the measurement range is limited by the traffic capacity of ships, so it is not suitable for shallow water measurement. Airborne lidar bathymetry (ALB) can achieve fast, intensive and accurate measurements in shallow waters, and has been widely used in the production of ocean depth maps, shallow water monitoring, underwater target detection, and three-dimensional points of underwater terrain. fields such as cloud generation (Liu et al., 2011). The principle of ALB technology is to use the blue-green laser (532nm) with strong penetrability to the water body, through the emission and recept...

Claims

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Application Information

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IPC IPC(8): G01S17/08G01S7/48G01F23/292G01F23/00
CPCG01S17/08G01S7/4802G01S7/4808G01F23/292G01F23/80Y02A90/30
Inventor 徐青王丹菂邢帅李鹏程张衡焦麟李鹏蓝朝桢张鑫磊施群山吕亮侯一凡侯慧太
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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