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A Method for Suppressing Multipath Interference of UWB Through-Wall Radar Signals

A technology of through-wall radar and multipath interference, which is applied in the field of radar, can solve the problems of false targets, reduce the probability of false targets, improve the signal-to-noise ratio, and weaken the amplitude

Active Publication Date: 2018-11-13
SHANDONG ACAD OF SCI INST OF AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the shortcomings of the prior art, the present invention provides a method for suppressing the multipath interference of ultra-wideband through-wall radar signals.

Method used

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  • A Method for Suppressing Multipath Interference of UWB Through-Wall Radar Signals
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  • A Method for Suppressing Multipath Interference of UWB Through-Wall Radar Signals

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Embodiment Construction

[0029] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0030] figure 1 It is a schematic diagram of the scene where the through-the-wall radar detects the human target behind the wall. Such as figure 1 As shown, there are furniture and other furnishings, windows and doors in the detected area, and the human body moves indoors; the through-wall radar system is placed outside the wall, and the antenna is placed close to the wall. Due to the existence of strong reflective objects such as window glass, it will follow the human body The target produces multipath effect, which appears as a strong false target on the signal.

[0031] Such as figure 2 Shown is the flow chart of conventional method processing. As shown in the figure, the method of suppressing the multipath interference of ultra-wideband through-wall radar signals is as follows:

[0032] Sampling the received UWB wall-penetrating radar signal to obta...

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Abstract

The invention discloses a method for inhibiting multipath interference of an ultra wideband through wall radar signal. The method comprises the following steps of: 1, sampling a received ultra wideband through wall radar signal so as to obtain time domain data A, and performing distance direction Fourier transform on the time domain data A so as to obtain a complex matrix B; 2, performing row front and rear cancellation treatment on the complex matrix B and a complex matrix B after demolding in sequence respectively, and performing Fourier transform rear demolding processing in a speed direction and accumulation processing in the speed direction so as to obtain a first vector and a second vector respectively; 3, calculating differences of the second vector and the first vector so as to obtain a difference vector, and performing target detection on the obtained difference vector, thereby finally achieving the purposes of inhibiting multipath interference, and obtaining a target number and target distance information of the ultra wideband through wall radar signal.

Description

technical field [0001] The invention belongs to the field of radar, in particular to a method for suppressing multipath interference of ultra-wideband through-wall radar signals. Background technique [0002] Ultrawideband (UWB) radar is generally defined as: a radar whose fractional bandwidth (FBW) of the radar transmitted signal is greater than 0.25. Ultra-wideband technology is to realize communication, detection and remote sensing functions through a series of processing and processing of very short single pulses, including generation, transmission, reception and processing. Ultra-wideband refers to one of the key features of the technology, which is that it takes up a lot of bandwidth. It can also be called pulse radar (Impulseradar), pulse radio (impulseradio), carrier-free (carrier-free) technology and time domain (timedomain) technology, etc. [0003] Ultra-wideband radar has the characteristics of large bandwidth. Compared with conventional narrow-band radar syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 常天英赵兴文崔洪亮杨秀蔚颜广张琳张延波田现忠刘晴晴
Owner SHANDONG ACAD OF SCI INST OF AUTOMATION
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