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UWB Radar Equivalent Sampling Method for Improving Target Signal-to-Noise Ratio

An ultra-wideband radar and target signal-to-noise ratio technology, applied in the field of effective sampling, can solve the problems of poor echo quality of long-distance targets and the inability to guarantee radar imaging quality, etc., to achieve the effect of compensating signal propagation loss and improving imaging quality

Active Publication Date: 2020-01-03
HUNAN TAIKANG ELECTRONICS INFORMATION TECH CO LTD
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Problems solved by technology

[0008] The invention provides an ultra-wideband radar equivalent sampling method for improving the target signal-to-noise ratio, which solves the problem of the long-distance target echo quality existing in the existing method for improving the radar target SNR when the dynamic range of the radar receiver is limited. Very poor, can not guarantee the imaging quality of the radar at all detection ranges Technical issues

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  • UWB Radar Equivalent Sampling Method for Improving Target Signal-to-Noise Ratio

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Embodiment Construction

[0029] The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention.

[0030] The schematic diagram of the UWB radar equivalent sampling method for improving the target signal-to-noise ratio provided by the present invention is as follows figure 2 As shown, in the process of sequential equivalent sampling, the echoes at different distances are accumulated with different pulse numbers, and then a cycle of signal waveform is reconstructed, so that the target SNR at all distances is improved and kept consistent.

[0031] The flow chart of the ultra-wideband radar equivalent sampling method for improving the target signal-to-noise ratio provided by the present invention is as follows image 3 shown, including the following ste...

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Abstract

The invention provides an ultra wideband radar equivalent sampling method which the improvement of a target signal-to-noise (SNR) ratio. The method comprises a step of sampling M1 continuous cycle echos from the sampling time tacq of a first digital sample of a range and accumulating obtained M1 sampling points, a step of sampling Mn continuous cycle echos at a sampling time tacq + (n-1) Delta T, and accumulating obtained Mn sampling points, and a step of allowing n=n+1 and repeating the above step until the sample sampling in a radar detection range is ended, and combining N+1 accumulated sampling points according to a sequence to reconstruct the signal waveform of a period. According to the method, in a sequential equivalent sampling process, the echos of different ranges are subjected to the accumulation of different pulse numbers to improve the SNR, then the signal waveform of a period is reconstructed, thus the SNRs of a given target at all ranges are approximately the same, and the purpose of compensating signal transmission loss is achieved.

Description

technical field [0001] The invention relates to the field of ultra-wideband imaging radar, in particular to an equivalent sampling method for ultra-wideband radar that improves and maintains the SNR (Signal Noise Ratio, signal-to-noise ratio) of echoes at all distances. Background technique [0002] Ultra-wideband pulses have the advantages of good penetration, high resolution, and strong ability to suppress multipath clutter, and are widely used in imaging radars. However, in order to sample and receive ultra-wideband pulse echo signals and obtain high-quality images within the radar detection range, there are mainly two difficulties: [0003] 1. Sampling reception of UWB pulse echo [0004] Ultra-wideband pulse is a narrow pulse signal in time domain without carrier, and its spectrum range is very wide. If it is sampled in real time, the high sampling frequency will make the engineering implementation difficult and costly. Therefore, the equivalent time sampling method i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 朱国富雷鹏正
Owner HUNAN TAIKANG ELECTRONICS INFORMATION TECH CO LTD
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