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Adaptive resampling-based radar signal compression method

A technology of radar signal and compression method, which is applied in the direction of radio wave measurement system, instrument, etc., can solve the problem of large amount of data, achieve the effect of reducing the sampling frequency and solving the problem of excessive sampling frequency

Inactive Publication Date: 2012-07-18
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the problem that the radar signal has a large amount of data due to the fact that the sampling frequency is much higher than the required sampling frequency during collection, and provides a radar based on adaptive resampling that reduces the sampling frequency by compressing signals of different time periods respectively Signal Compression Method

Method used

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  • Adaptive resampling-based radar signal compression method
  • Adaptive resampling-based radar signal compression method
  • Adaptive resampling-based radar signal compression method

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Embodiment Construction

[0021] After the radar receiver (or receiver) collects the radar signal, the data signal obtained is compressed by the method of the present invention, and the detailed steps are as follows:

[0022] (1) Segment the radar signal

[0023] The length of each segment of the radar signal is reasonably determined according to the requirements of the radar signal compression ratio and processing speed; in the present invention, the data collected every 10 ms is regarded as a segment. Due to the different sampling rates of radar signals, the radar signal needs to be segmented. The length of the segment needs to be flexibly determined according to the actual needs. If the segment is too long, the ideal compression effect cannot be achieved because the frequency components are too rich, and the segment is too short. The processing speed is affected due to the increase in the amount of calculation. Radar signal compression model such as figure 1 shown.

[0024] (2) Spectrum estimatio...

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Abstract

The invention provides an adaptive resampling-based radar signal compression method, which comprises the following steps: (1) segmenting radar signals, and reasonably determining the length of each segment of radar signals according to the requirements on a radar signal compression ratio and a processing speed; (2) performing spectrum analysis on each segment of radar signals, determining a resampling ratio of each segment of radar signals through analysis and determining the radar signal compression ratio; (3) resampling the radar signals according to new sampling frequency to compress the radar signals; and (4) reconstructing the radar signals as required, namely performing zero interpolation on the radar signals, recovering the compressed signals to the original length, and reconstructing the signals through filtration by a low pass filter of which the limiting frequency is half of the signal resampling frequency. In the method, signals in different time intervals are compressed respectively, the sampling frequency is reduced and a problem of overhigh sampling frequency when the radar signals are acquired is solved.

Description

technical field [0001] The invention relates to a radar signal compression method used for radar radiation source signal identification, analysis and other processing. technical background [0002] Radar has been widely used in various fields of military and civilian use. In order to obtain effective information, it is necessary to identify and analyze the collected radar signals. However, in practical applications, before the radar signal is identified and analyzed, it is usually necessary to store or transmit the radar signal. However, the amount of radar signal data collected in practical applications is extremely large, which brings great difficulties to real-time data storage and transmission. Under the same communication capacity or storage capacity, if the radar signal is compressed first, and then stored or transmitted, the storage and transmission capacity of information can be improved. Therefore, it is very meaningful to effectively compress the radar signal. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02
Inventor 韩民孙业超张顺利杨阳
Owner SHANDONG UNIV