CN109164446A - Two-band vital signs detecting radar system based on superhet and low intermediate frequency structure - Google Patents
Two-band vital signs detecting radar system based on superhet and low intermediate frequency structure Download PDFInfo
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- CN109164446A CN109164446A CN201811094519.5A CN201811094519A CN109164446A CN 109164446 A CN109164446 A CN 109164446A CN 201811094519 A CN201811094519 A CN 201811094519A CN 109164446 A CN109164446 A CN 109164446A
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- 238000005516 engineering process Methods 0.000 description 11
- 238000001514 detection method Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 7
- 230000002612 cardiopulmonary effect Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 101100381996 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) BRO1 gene Proteins 0.000 description 3
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- 230000001766 physiological effect Effects 0.000 description 1
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- 230000000241 respiratory effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
- G01S13/536—Discriminating between fixed and moving objects or between objects moving at different speeds using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S13/36—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/35—Details of non-pulse systems
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The two-band vital signs detecting radar system based on superhet and low intermediate frequency structure that the invention discloses a kind of, including receiving antenna and transmitting antenna, receiving antenna series connection low-noise amplifier, No.1 frequency mixer and bandpass filter, the No.1 frequency mixer is connected with No.1 low-pass filter, No.1 low-pass filter connects No.1 analog-digital converter, No. two frequency mixers of bandpass filter series connection, No. two low-pass filters and No. two analog-digital converters；Transmitting antenna connects power amplifier, and power amplifier connects power combining structures, and power combining structures input terminal connects No. two phase-locked loop chips being connected with No. two mixer inputs all the way, and another way connects power splitter；Power splitter input terminal connects No.1 phase-locked loop chip, and output end is connected to power combining structures input terminal all the way, and another way is connected to No.1 mixer input.The present invention can solve the problems, such as that direct current biasing and mirror image inhibit simultaneously, realize the Effect on Detecting of the vital sign parameter signals of higher precision.
Description
Technical field
The present invention relates to vital signs detecting fields, and more specifically, it relates to one kind based on superhet and Low Medium Frequency knot
The two-band vital signs detecting radar system of structure.
Background technique
Vital signs detecting technology main detection be people cardiopulmonary activity parameter, be used for by the cardiopulmonary information detected
The emergency event of judgement and emergency processing medically to life entity.Therefore vital signs detecting technology right and wrong are practical often with having
[1] of value and significance.The sensor, method for realizing vital signs detecting is touch sensor, and this kind of sensor is to pass through patch
Human body surface is invested to complete the collection of cardiopulmonary signal and processing, such as respiratory monitor, echocardiography instrument in hospital
Deng, it is bulky although this kind of sensor accurate measurement precision is high, it is at high cost, it is unfavorable for family and personal popularization, and this
The sensor of kind contact has many limitations, such as the patient of large-area burns in use, is not just available contact
Tactility apparatus measure its cardiopulmonary information [2]；Non-contact vital sign Detection Techniques just avoid above-mentioned disadvantage well, especially
It is the doppler radar technology in contactless vital signs detecting technology, this technology is examined based on Doppler effect
Life entity movement small due to caused by physiological activity is surveyed, the information of cardiopulmonary is obtained by these small movements.And
The penetrability ability of this detector is very strong, and adaptive capacity to environment is high, is very suitable to apply as earthquake rescue, critically ill patient
Equal places [3].
Currently, contactless human life detection institute facing challenges are the problems such as direct current biasing, mirror image inhibit.So far
Until, many research teams propose the scheme of various solutions aiming at the problem that non-contact vital sign Detection Techniques at present,
The influence of all for example DC-offset corrections proposes a kind of AC coupled technology, but it is realizing what reduction direct current biasing influenced
Signal is also affected simultaneously, is easy to cause the distortion of signal, implementation method is more complicated [4]；And mirror image inhibits problem universal
It is present in super-heterodyne architecture used by vital signs detecting technology, is using main knot of the super-heterodyne architecture as transceiver
When structure, existing mirror image will be led to the problem of and inhibited.
In conclusion to solve the problems, such as that direct current biasing present in existing vital signs detecting method, mirror image inhibit, urgently
A kind of new detector structural approach is needed, realizes higher detection accuracy, reaches the mesh of more acurrate detection vital sign parameter signals
's.
[bibliography]
[1] research of non-contact vital sign detection technique [D] the Chinese science technology of Hu Wei based on Doppler radar
University, 2014.
[2] super .- kind radio frequency bioradar systematic research [D] Institutes Of Technology Of Nanjing of side, 2016.
[3] human body vital sign detection study [D] University of Electronic Science and Technology .2016 of the valiant of horse towards Post disaster relief.
[4] Cheng Yao non-contact vital sign radar-probing system and Antenna Design [D] Institutes Of Technology Of Nanjing, 2014.
Summary of the invention
Purpose of the invention is to overcome the shortcomings in the prior art, provides a kind of based on superhet and low intermediate frequency structure
Two-band vital signs detecting radar system, can solve the problems, such as that direct current biasing and mirror image inhibit simultaneously, realize more high-precision
The Effect on Detecting of the vital sign parameter signals of degree.
The purpose of the present invention is what is be achieved through the following technical solutions.
Two-band vital signs detecting radar system based on superhet and low intermediate frequency structure of the invention, including receive day
Line and transmitting antenna, the receiving antenna have been sequentially connected in series low-noise amplifier, No.1 frequency mixer and bandpass filter, and described one
Number frequency mixer is connected with No.1 low-pass filter, and the No.1 low-pass filter is connected with No.1 analog-digital converter, the band logical
Filter has been sequentially connected in series No. two frequency mixers, No. two low-pass filters and No. two analog-digital converters；
The transmitting antenna connects power amplifier, and the power amplifier is connected with power combining structures, the function
Rate composite structure input terminal is divided into two-way, wherein being connected with No. two locking phase ring cores being connected with No. two mixer inputs all the way
Piece, another way are connected with power splitter；The power splitter input terminal is connected with No.1 phase-locked loop chip, and output end is divided into two-way,
In be connected to power combining structures input terminal all the way, another way is connected to No.1 mixer input.
The No.1 mixer output is separately connected bandpass filter input terminal and No.1 low-pass filter input terminal.
No. two mixer inputs are separately connected bandpass filter output end and No. two phase-locked loop chip output ends, institute
It states No. two mixer outputs and connects No. two low-pass filter input terminals.
The power combining structures use combiner.
Compared with prior art, the beneficial effects brought by the technical solution of the present invention are as follows:
(1) present invention can be improved the accuracy of vital signs detecting and can be monitored using double frequency-band using double frequency-band
The location information of target；
(2) present invention can reduce power loss；
(3) present invention simplifies receiver structure, and reception and processing signal need to can be only realized with receiver structure all the way
Effect, do not use I/Q structure, design cost and the time of circuit can be saved.
Detailed description of the invention
Fig. 1 is the two-band vital signs detecting radar system schematic diagram based on superhet and low intermediate frequency structure.
Appended drawing reference: Power synthesis power combining structures, PA power amplifier, Tx_Antenna transmitting antenna,
Rx_Antenna receiving antenna, Power_Divider power splitter, LO1 No.1 phase-locked loop chip, No. bis- phase-locked loop chips of LO2,
BPF bandpass filter, Mixer1 No.1 frequency mixer, No. bis- frequency mixers of Mixer2, LNA low-noise amplifier, LPF1 No.1 low pass
Filter, No. bis- low-pass filters of LPF2, ADC1 No.1 analog-digital converter；No. No. bis- analog-digital converters of ADC2.
Specific embodiment
Illustrate technical solution of the present invention in order to clearer, the present invention will be further explained below with reference to the attached drawings.It is right
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
His attached drawing.
Two-band vital signs detecting radar system based on superhet and low intermediate frequency structure of the invention, as shown in Figure 1,
Including receiving antenna Rx_Antenna and transmitting antenna Tx_Antenna.The receiving antenna Rx_Antenna has been sequentially connected in series low
Noise amplifier LNA, No.1 frequency mixer Mixer1 and bandpass filter BPF.The No.1 frequency mixer Mixer1 is connected with No.1
Low-pass filter LPF1, the No.1 low-pass filter LPF1 are connected with No.1 analog-digital converter ADC1.The bandpass filter
BPF has been sequentially connected in series No. two frequency mixer Mixer2, No. two low-pass filter LPF2 and No. two analog-digital converter ADC2.
The transmitting antenna Tx_Antenna connection power amplifier PA, the power amplifier PA input terminal connect function
Rate composite structure Power synthesis output end, the power combining structures Power synthesis input terminal are divided into two
Road, wherein being connected with No. two phase-locked loop chip LO2 all the way, it is defeated that No. two phase-locked loop chip LO2 are also connected with No. two frequency mixer Mixer2
Enter end, another way is connected with power splitter Power_Divider.The power splitter Power_Divider input terminal is connected with No.1
Phase-locked loop chip LO1, output end are divided into two-way, wherein it is connected to power combining structures Power synthesis input terminal all the way,
Another way is connected to No.1 frequency mixer Mixer1 input terminal.
Specifically, the No.1 frequency mixer Mixer1 input terminal is separately connected low-noise amplifier LNA output end and function point
Device Power_Divider output end, the No.1 frequency mixer Mixer1 output end be separately connected bandpass filter BPF input terminal and
No.1 low-pass filter LPF1 input terminal.No. two frequency mixers Mixer2 input terminal is separately connected bandpass filter BPF output
End and No. two phase-locked loop chip LO2 output ends, No. two frequency mixers Mixer2 output end connect No. two low-pass filter LPF2
Input terminal.Combiner can be used in the power combining structures Power synthesis.
Realize that principle such as formula (1), (2) of the core of vital signs detecting are shown:
sig1(t)=cos (2 π f1t+θ1(t)) (1)
sig2(t)=cos (2 π f2t+θ2(t)) (2)
The signal source emitted it can be seen from formula (1), (2) is two paths of signals, wherein sig1It (t) is low frequency signal,
sig2It (t) is high-frequency signal, the frequency for emitting signal is respectively f1And f2, θ1It (t) is transmitting signal f1Gross phase noise, θ2
It (t) is transmitting signal f2Gross phase noise, and this two paths of signals f1It is the frequency of low frequency signal, f2It is high-frequency signal
Frequency, t are the time.
Assuming that the fixed range of transmiting signal source and human body is L, distance caused by heartbeat is x (t), then for
Emit signal for, when its be emitted to be received back come be total to pass through 2L (t)=2L+2x (t) distance, then be received back signal
Expression formula are as follows:
Wherein, Sre1It (t) is the low frequency signal for being modulated with baseband signal, Sre2It (t) is the high frequency letter for being modulated with baseband signal
Number, c is the speed that signal is propagated, and λ=c/f is the wavelength for emitting signal.As the two paths of signals Sre being received back1(t)、Sre2
(t) after No.1 frequency mixer is mixed for the first time, while entering the local oscillator of No.1 frequency mixer generated by No.1 phase-locked loop chip
Signal LO_1, after being mixed with above-mentioned two-way reception signal, it will generate four road signals, at this time its in generated four road signals
He is respectively as follows: 2f at the frequency on three tunnels1、f1+f2、f1-f2, also produce a baseband signal:
Tetra- road signal of Zhe will be obtained and be divided into two-way, pass through No.1 low-pass filter all the way, filter out in addition to baseband signal
Other high-frequency signals, baseband signal Sig required for obtainingB1(t)；Another way signal will pass through secondary mixing.It is mixed from first
From the point of view of result after frequency, our available intermediate-freuqncy signal, signal frequency f1-f2；This intermediate-freuqncy signal is carried out later
Processing, the Sig that system generates2(t), after four frequency dividings obtained signal just with f1-f2Corresponding to this intermediate-freuqncy signal, this
Sample, which just just avoids, reuses a frequency mixer, while the phenomenon that also avoid local oscillator drift.Pass through secondary mixing at this time
Afterwards, obtained another baseband signal SigB2(t) are as follows:
Gained two-way includes the signal of baseband signal, then signal processing is carried out to this two-way baseband signal, at observation
Parameter, waveform for being obtained after reason etc..
In order to easy to operate, the specific implementation process of the present invention is as follows:
Firstly, determining suitable emission signal frequency.Based on the existing dual-frequency amplifier circuit board in laboratory, selection and its
Identical signal frequency.
Then, based on the radar system having proposed, theoretical verifying is carried out.
Be analyzed as follows: the signal source of transmitting is two paths of signals, wherein the frequency of transmitting signal is respectively f1And f2, such as formula
(1),(2).The signal that receiver section receives is formula (3), shown in (4), as this two paths of signals Sre1、Sre2Enter simultaneously
When Mixer1, first time mixing is carried out using local oscillation signal LO_1, wherein shown in LO_1 such as formula (7).
LO_1=cos (2 π f1t+θ1(t)) (7)
After first time is mixed, four class signals will be generated, as shown in formula (5), (8), (9), (10):
After first time is mixed it can be seen from formula (5), (8), (9), (10), an available base band is believed
Number SigB1, an intermediate-freuqncy signal S2With the signal S of two high frequencies1And S3, we are what is desired is that baseband signal SigB1And intermediate frequency
Signal S2, so being directed to baseband signal SigB1, need to add a low-pass filter behind frequency mixer Mixer1, by intermediate frequency
Signal and high-frequency signal filter out；For intermediate-freuqncy signal S2, need to add a bandpass filter for low frequency signal and high-frequency signal
It filters out.The baseband signal Sig that will be obtainedB1Carry out signal processing, obtained intermediate-freuqncy signal S2Second of mixing is carried out again.Second
It is mixed the local oscillation signal LO_2 generated by No. two phase-locked loop chips used, formula (11) is as follows:
Some differences of local oscillation signal LO_2, frequency are wherein to emit signal f all the way2A quarter, why in this way
It is because of intermediate-freuqncy signal S2Signal frequency f1-f2Exactly emit signal f2A quarter, and generate transmitting signal f2's
VCO can just carry out frequency dividing output.Then second is carried out using this condition to be mixed, just eliminate and reuse a local oscillator
Source also avoids local oscillator drift.By LO_2 and intermediate-freuqncy signal S2It will be obtained after being mixed into formula (6) resulting baseband signal
SigB2.By obtain two baseband signal (SigB1、SigB2) by carrying out digital filtering, sampling at virtual instrument (LABVIEW)
Obtained cardiopulmonary signal is observed in equal processing.
Step 3: select suitable No.1 phase-locked loop chip LO1, No. two phase-locked loop chip LO2, No.1 frequency mixer
The chips such as Mixer1, No. two frequency mixer Mixer2, low-noise amplifier LNA.Analysis based on above-mentioned theory, in selection phaselocked loop
When chip, wherein the requirement of a phase-locked loop chip is to export two paths of signals simultaneously, and this two paths of signals frequency is closed at n times
System.
Step 4: design schematic diagram and production PCB circuit board.In design schematic diagram it is noted that between each circuit module
Matching relationship.It can be with the databook of reference chip for the circuit design of each module.
Claims (4)
1. a kind of two-band vital signs detecting radar system based on superhet and low intermediate frequency structure, including receiving antenna (Rx_
Antenna) and transmitting antenna (Tx_Antenna), which is characterized in that the receiving antenna (Rx_Antenna) has been sequentially connected in series
Low-noise amplifier (LNA), No.1 frequency mixer (Mixer1) and bandpass filter (BPF), the No.1 frequency mixer (Mixer1)
It is connected with No.1 low-pass filter (LPF1), the No.1 low-pass filter (LPF1) is connected with No.1 analog-digital converter
(ADC1), the bandpass filter (BPF) be sequentially connected in series No. two frequency mixers (Mixer2), No. two low-pass filters (LPF2) and
No. two analog-digital converters (ADC2)；
The transmitting antenna (Tx_Antenna) connects power amplifier (PA), and the power amplifier (PA) is connected with power
Composite structure (Power synthesis), power combining structures (Power synthesis) input terminal are divided into two-way,
In be connected with No. two phase-locked loop chips (LO2) being connected with No. two frequency mixer (Mixer2) input terminals all the way, another way is connected with
Power splitter (Power_Divider)；Power splitter (Power_Divider) input terminal is connected with No.1 phase-locked loop chip
(LO1), output end is divided into two-way, wherein being connected to power combining structures (Power synthesis) input terminal, another way all the way
It is connected to No.1 frequency mixer (Mixer1) input terminal.
2. the two-band vital signs detecting radar system according to claim 1 based on superhet and low intermediate frequency structure,
It is characterized in that, No.1 frequency mixer (Mixer1) input terminal is separately connected low-noise amplifier (LNA) output end and function point
Device (Power_Divider) output end, it is defeated that No.1 frequency mixer (Mixer1) output end is separately connected bandpass filter (BPF)
Enter end and No.1 low-pass filter (LPF1) input terminal.
3. the two-band vital signs detecting radar system according to claim 1 based on superhet and low intermediate frequency structure,
It is characterized in that, No. two frequency mixers (Mixer2) input terminal is separately connected bandpass filter (BPF) output end and No. two locks
Phase ring core piece (LO2) output end, No. two frequency mixers (Mixer2) output end connect No. two low-pass filter (LPF2) inputs
End.
4. the two-band vital signs detecting radar system according to claim 1 based on superhet and low intermediate frequency structure,
It is characterized in that, the power combining structures (Power synthesis) use combiner.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811094519.5A CN109164446B (en) | 2018-09-19 | 2018-09-19 | Double-frequency-band vital sign detection radar system based on superheterodyne and low-intermediate frequency structure |
| LU101282A LU101282B1 (en) | 2018-09-19 | 2019-07-02 | Dual-band vital signs detection radar system based on superheterodyne and low-intermediate frequency structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811094519.5A CN109164446B (en) | 2018-09-19 | 2018-09-19 | Double-frequency-band vital sign detection radar system based on superheterodyne and low-intermediate frequency structure |
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| CN109164446B CN109164446B (en) | 2023-01-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112558062A (en) * | 2019-09-25 | 2021-03-26 | 天津大学 | Multi-target vital sign radar detection system based on coding and phased array antenna |
| WO2024021203A1 (en) * | 2022-07-29 | 2024-02-01 | 天津大学 | 5g dual-frequency bidirectional transceiver having high degree of image rejection |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080077015A1 (en) * | 2006-05-17 | 2008-03-27 | Olga Boric-Lubecke | Determining presence and/or physiological motion of one or more subjects with multiple receiver Doppler radar systems |
| CN101458326A (en) * | 2007-12-14 | 2009-06-17 | 南京理工大学 | Life detecting device based on pseudocode phase-modulated continuous wave system |
| CN102419434A (en) * | 2011-08-12 | 2012-04-18 | 西安天伟电子系统工程有限公司 | Intermediate-frequency and radio-frequency universal target simulator for pulse pressure radar |
| CN204794979U (en) * | 2015-06-23 | 2015-11-18 | 江苏星宇芯联电子科技有限公司 | Wireless receiver circuit |
| CN105796099A (en) * | 2016-03-08 | 2016-07-27 | 太原理工大学 | Radar type remote vital sign monitoring system based on self-rotating microwave detector |
| CN105829910A (en) * | 2013-12-20 | 2016-08-03 | 恩德莱斯和豪瑟尔两合公司 | PRF frequency generator for a fill state measuring device |
| US20160336989A1 (en) * | 2015-05-14 | 2016-11-17 | University Of Florida Research Foundation, Inc. | Low if architectures for noncontact vital sign detection |
| CN107453775A (en) * | 2017-08-24 | 2017-12-08 | 南京理工大学 | A kind of zero intermediate frequency reciver |
-
2018
- 2018-09-19 CN CN201811094519.5A patent/CN109164446B/en active Active
-
2019
- 2019-07-02 LU LU101282A patent/LU101282B1/en active IP Right Grant
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080077015A1 (en) * | 2006-05-17 | 2008-03-27 | Olga Boric-Lubecke | Determining presence and/or physiological motion of one or more subjects with multiple receiver Doppler radar systems |
| CN101458326A (en) * | 2007-12-14 | 2009-06-17 | 南京理工大学 | Life detecting device based on pseudocode phase-modulated continuous wave system |
| CN102419434A (en) * | 2011-08-12 | 2012-04-18 | 西安天伟电子系统工程有限公司 | Intermediate-frequency and radio-frequency universal target simulator for pulse pressure radar |
| CN105829910A (en) * | 2013-12-20 | 2016-08-03 | 恩德莱斯和豪瑟尔两合公司 | PRF frequency generator for a fill state measuring device |
| US20160336989A1 (en) * | 2015-05-14 | 2016-11-17 | University Of Florida Research Foundation, Inc. | Low if architectures for noncontact vital sign detection |
| CN204794979U (en) * | 2015-06-23 | 2015-11-18 | 江苏星宇芯联电子科技有限公司 | Wireless receiver circuit |
| CN105796099A (en) * | 2016-03-08 | 2016-07-27 | 太原理工大学 | Radar type remote vital sign monitoring system based on self-rotating microwave detector |
| CN107453775A (en) * | 2017-08-24 | 2017-12-08 | 南京理工大学 | A kind of zero intermediate frequency reciver |
Non-Patent Citations (2)
| Title |
|---|
| WU Y 等: "The design of digital radar receivers", 《PROCEEDINGS OF THE 1997 IEEE NATIONAL RADAR CONFERENCE》 * |
| 顾昌展: "基于微波多普勒方法的非接触生命信号探测", 《中国优秀博硕士学位论文全文数据库(硕士)信息科技辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112558062A (en) * | 2019-09-25 | 2021-03-26 | 天津大学 | Multi-target vital sign radar detection system based on coding and phased array antenna |
| WO2024021203A1 (en) * | 2022-07-29 | 2024-02-01 | 天津大学 | 5g dual-frequency bidirectional transceiver having high degree of image rejection |
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| CN109164446B (en) | 2023-01-06 |
| LU101282B1 (en) | 2019-11-08 |
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