Radar Doppler return signal data compression method

A Doppler echo and signal data technology, which is applied in the field of radar Doppler echo signal data compression, can solve the problems of undisclosed radar Doppler echo signal data compression methods, etc., to reduce storage space and data Transmission time, good application prospects, effect of reducing transmission time

Inactive Publication Date: 2013-12-25
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

[0004] In summary, the prior art does not disclose a data compression method for radar Doppler echo signals

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  • Radar Doppler return signal data compression method

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Embodiment Construction

[0023] based on the following Figure 1 ~ Figure 4 , specifically explain the preferred embodiment of the present invention.

[0024] Such as figure 1 Shown, the present invention provides a kind of radar Doppler echo signal data compression method, and this data compression method comprises the following steps:

[0025] Step 1, Fourier transform;

[0026] Perform Fourier FFT transform on the original data, that is, convert the radar Doppler echo signal data from the time domain to the frequency domain, and the Fourier transform can achieve effective data compression;

[0027] Step 2, extract data;

[0028] In the frequency domain, the data with the most concentrated energy of the radar Doppler echo signal is called the main frequency band data, and the spectral components of the main frequency band are also the most abundant;

[0029] Useful data can be extracted by extracting the data in the main frequency band and eliminating the data outside the main frequency band;

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Abstract

A radar Doppler return signal data compression method comprises the steps that Fourier transform is firstly conducted on original data, the data are converted to frequency domain data from time domain data, the frequency domain data of signals are analyzed and processed, useful data in a dominant frequency band range are extracted from the frequency domain data, the data outside the dominant frequency band range are eliminated, and the extracted useful data are stored in a database; reductive processing is conducted on the frequency domain data, so that the length of the obtained frequency domain data is identical to that of the original data, inverse Fourier transform is further conducted, the signal data are converted into time domain data from the frequency domain data, and therefore the original data are recovered. According to the radar Doppler return signal data compression method, rapid Fourier transform and rapid inverse Fourier transform are adopted, the radar Doppler return signal data are compressed through analysis and processing of the radar Doppler return signals, the storage space is greatly reduced, the data transmission time is greatly shortened, the difficult problems existing in radar Doppler return signal data storage and transmission are solved, and the application prospect is good.

Description

technical field [0001] The invention relates to a method for compressing radar Doppler echo signal data. Background technique [0002] At present, in the radar Doppler echo signal simulation, the amount of data generated is huge, which brings great difficulties to storage and processing. If binary data storage is used, although it can play a role in data compression, the compression rate is relatively limited, especially for the calculation of the target video echo signal, because the amount of data is very large, so the effect is not very obvious. [0003] The domestic and foreign databases were searched for the existing technology, and two documents were retrieved among the retrieved domestic and foreign public and limited published documents. 1) Li Yuqian, Pi Yiming. SAR Raw Data Compression Algorithm [J]. Surveying and Mapping, 2009,32(2): P54-58. According to the characteristics of SAR raw data, this paper introduces several compression algorithms for SAR raw data, an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/30
Inventor 顾俊王晓冰梁子长
Owner SHANGHAI RADIO EQUIP RES INST
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