CN108957412A - Radar detection and method for communication transmission based on piece-wise linear FM signal - Google Patents
Radar detection and method for communication transmission based on piece-wise linear FM signal Download PDFInfo
- Publication number
- CN108957412A CN108957412A CN201810765084.6A CN201810765084A CN108957412A CN 108957412 A CN108957412 A CN 108957412A CN 201810765084 A CN201810765084 A CN 201810765084A CN 108957412 A CN108957412 A CN 108957412A
- Authority
- CN
- China
- Prior art keywords
- signal
- piece
- linear
- radar
- wise linear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- G01S7/40—Means for monitoring or calibrating
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/103—Chirp modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/12—Modulator circuits; Transmitter circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a kind of radar detection based on piece-wise linear FM signal and method for communication transmission, solving reduces radar data reduction after radar signal modulation communication data and the problem of shared signal is unfavorable for Linear Amplifer.Specific steps have: radar communication data prediction；Piece-wise linear FM signal parameter is set；Generate piece-wise linear FM signal；Emit and receives pulse-modulated signal；The distance and speed of detection radar target；Demodulate radar communication data.The present invention devises the piece-wise linear FM signal with permanent envelope and fixed-bandwidth, does data modulation to middle section linear FM signal time width and frequency modulation polarity, it is made to carry the communication information, becomes the shared signal that can be detected target and transmit data.The present invention overcomes there is range ambiguity with normal pulsed signal detection, solving communications and radar detection occupies the contradiction of power, transmission is more acurrate, and the bit error rate is lower, in radar-communication integration system.
Description
Technical field
The invention belongs to Radar Technology field, the detection and communications in radar communication are further related to, specifically
A method of radar detection and communications based on piece-wise linear FM signal.For radar-communication integration system
In.
Background technique
The platforms such as airborne, carrier-borne are to adapt to future information technology development, embody " information-based advantage ", it is desirable that the hair of platform
It opens up and using having systematization trend, realizes various airborne platforms by electronic information channel cross-cutting, over-distance real-time
Cooperation.Meanwhile to adapt to the requirement of modernization Information Environment, airborne platform needs to equip large number of electronic equipment such as
Radar, communication equipment etc., but these equipment not only occupy expensive real estate in platform, increase its load, deteriorate surrounding electromagnetism ring
Border, if can increase communication function on radar equipment, makes it with a system so that Aerial Electronic Equipment comprehensive performance is affected
Operation, and design a kind of shared signal of radar communication, it will greatly improve the comprehensive utilization ratio of electronic equipment.
Paper " the radar communication based on Fourier Transform of Fractional Order that Li Xiaobai, Yang Ruijuan, Chen Xinyong et al. are delivered at it
The shared research of integration signal " (signal processing, 2012,28 (4): 487-494) proposes a kind of based on linear FM signal
(Chirp) method of original frequency modulation communication information realization radar-communication integration.This method is different using Chirp signal
Original frequency user data is modulated, reached the transmission of single Chirp signal multi-bit information.Its existing deficiency
Place is that communication data demodulating process does not have robustness to Doppler, and under identical bandwidth condition, the frequency spectrum of communication is imitated
Rate is lower, it is difficult to meet the transmission of wartime high-volume data, and with the demodulation method of original frequency modulation intelligence.
Xian Electronics Science and Technology University " realizes radar detection and communications based on linear FM signal in the patent of its application
Method " (application number 201710028374, publication number 106772350A) propose a kind of multicarrier linear FM signal, by changing
The frequency modulation rate modulation communication data for becoming subcarrier linear FM signal, overcome traditional technology modulation communication number in radar signal
Radar detection target range and speed ability and the data demodulation process problem unstable to Doppler are reduced after, but
It is that the shared signal of multicarrier LFM is superimposed to obtain by main carrier with subcarrier, is used for radar detection with main carrier, subcarrier is used for
With i performance, if the power rise for communication, the power for radar detection can be declined, and its communication bandwidth meeting
Change with the difference of modulation data, thus overloading waveshape is unfavorable for linear amplifier work.That is, existing
LMF shares signalling technique and there is communication and radar detection occupancy radar transmission power contradiction, and exists and be unfavorable for Linear Amplifer
The technical issues of.
Summary of the invention
It is an object of the invention to keep existing LMF to share signalling technique, its deficiency is overcome, designing one kind has
Constant envelope realizes radar detection in the method for communications conducive to Linear Amplifer based on piece-wise linear FM signal.
The present invention is that a kind of radar detection based on piece-wise linear FM signal and method for communication transmission, feature exist
In comprising the following steps that
(1) it radar communication data prediction: by communication data serioparallel exchange pending and is grouped, obtains several with N
The array to be transmitted of binary number；
(2) piece-wise linear Wide band Chirp Waveform Generator is constructed, piece-wise linear FM signal initiation parameter is set:
The input of piece-wise linear Wide band Chirp Waveform Generator is array to be transmitted, and output is the continuous three-stage of relationship between frequency and time
Linear FM signal, the continuous three-stage linear FM signal of relationship between frequency and time are from left to right successively denoted as D1Section, section D2、D3Section；?
Initiation parameter is set in piece-wise linear Wide band Chirp Waveform Generator, the centre frequency f an of linear FM signal is setc, line
Property FM signal total bandwidth B and linear frequency modulation wave total time width τ, one include equally spaced 2M-1The linear frequency modulation of a time width
The time width library of signal, M indicate the binary data number that each pulse is sent, and M is equal to N, according to position of the time width in time width library
It sets and time width is numbered with decimal number, and number m is corresponding with binary data group；
(3) it generates piece-wise linear frequency modulation (PLFM) signal: array to be transmitted input piece-wise linear FM signal is produced
In raw device, piece-wise linear FM signal is generated according to array to be transmitted and piece-wise linear FM signal model, and by the letter
Number as reference signal transmission into the matched filter in radar detection processing module；
(4) emit pulse-modulated signal: while piece-wise linear FM signal is input to pulse-modulator, generate pulse
Pulse-modulated signal is input in radar transmitter by modulated piece-wise linear FM signal, abbreviation pulse-modulated signal,
And emit the pulse-modulated signal；
(5) receives echo-signal: radar receiver receives echo, and the echo of piece-wise linear FM signal is inputted respectively
Into radar detection processing module and radar communication data demodulation processing module；
(6) distance and speed of detection radar target: the piece-wise linear tune that radar detection processing module will first receive
The echo-signal of frequency signal is input to matched filter and carries out process of pulse-compression, obtains the distance of radar target, then by pulse
Signal input Doppler filter group after compression processing carries out moving-target detection MTD processing, obtains the speed of radar target；
(7) demodulation obtains radar communication data: while the work of radar detection processing module, that is, obtaining radar target
While the calculating process of distance and speed, demodulation obtains the communication number carried in the echo-signal of piece-wise linear FM signal
According to.
It is linear FM signal that the present invention, which devises a kind of be segmented, for not reducing in radar-communication integration system
Under the premise of radar data reduction, the transmission of radar communication data is realized with same set of system.
Compared with prior art, the present invention has the advantage that
First, it is constant envelope signal that the PLFM that the present invention designs, which shares signal, has constant communication bandwidth, to overcome
The shortcomings that prior art is unfavorable for linear amplifier.
Second, since the present invention is using using currently transmitted FM signal as the reference signal of matched filter, with
The echo received carries out process of pulse-compression, so that the matched filter in the present invention is different with the radar communication data of modulation
And change, to solve the problems, such as that normal pulsed signal can existing range ambiguity.
Third overcomes to exist in prior art and lead to since the present invention is realized using piece-wise linear FM signal
Letter transmission occupies the shortcomings that power and radar detection occupancy power contradiction.
4th, the present invention using piece-wise linear FM signal as shared signal, have constant bandwidth, time width and in
Frequency of heart, thus there is preferable correlation, so that overcome prior art modulates radar communication number in radar detection signal
According to rear, Radar Targets'Detection resolution ratio reduction, so that the present invention improves the performance of radar detection target range and speed.And it is logical
It crosses setting piece-wise linear frequency modulation (PLFM) and shares D in signal1Section, D3The bandwidth of section LFM signal, available better distance
Resolution ratio or lower first secondary lobe, further increase the performance of radar.
5th, since the present invention carries out Fourier Transform of Fractional Order processing using to echo, overcome prior art
The demodulating process of middle radar communication data is to the unstable property of Doppler, and the problem of cause the bit error rate to increase, so that of the invention
More acurrate to the transmission of radar communication data, the bit error rate is lower, to complete the transmission of pulse multi-bit data.
Detailed description of the invention
Fig. 1 is flow chart of the invention；
Fig. 2 is process of pulse-compression result analogous diagram of the invention；
Fig. 3 is moving-target detection MTD processing result analogous diagram of the invention；
Fig. 4 is Fourier Transform of Fractional Order result analogous diagram of the invention.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing.
Embodiment 1
Airborne platform needs to equip large number of electronic equipment such as radar, communication equipment etc., but these equipment are not only
The expensive real estate in platform is occupied, increases its load, deteriorate periphery electromagnetic environment, so that Aerial Electronic Equipment comprehensive performance is by shadow
It rings, for example airborne radar detection and communication use respective transmitter, the prior art has communication and radar detection occupies radar
Transmission power contradiction, and it is unfavorable for the problem of Linear Amplifer works, the present invention is explored and is studied for the expansion of this status, mentions
A kind of radar detection and method for communication transmission based on piece-wise linear FM signal is comprised the following steps that referring to Fig. 1 out
(1) it radar communication data prediction: by communication data serioparallel exchange pending and is grouped, obtains several with N
The array to be transmitted of binary number；
Radar communication serial data to be transmitted is divided into multiple arrays by (1a) radar emission end, is had in each array N number of
Binary data；
Serial date transfer after grouping to deserializer is converted into parallel data by (1b), obtains number to be transmitted
According to group.
(2) piece-wise linear Wide band Chirp Waveform Generator is constructed, piece-wise linear FM signal initiation parameter is set:
The input of piece-wise linear Wide band Chirp Waveform Generator is array to be transmitted, and output is the continuous three-stage of relationship between frequency and time
Linear FM signal, the continuous three-stage linear FM signal of relationship between frequency and time are from left to right successively denoted as D1、D2、D3, relationship between frequency and time
Continuous three-stage linear FM signal constructs signal with piece-wise linear FM signal model, i.e., three sections be respectively D1Section, D2
Section, D3Section.
Initiation parameter is set in piece-wise linear Wide band Chirp Waveform Generator, the center of a linear FM signal is set
Frequency fc, linear FM signal total bandwidth B and linear frequency modulation wave total time width τ, one include equally spaced 2M-1A time width
The time width library of linear FM signal, M indicate the binary data number that each pulse is sent, and M is equal to N, according to time width in time width
Time width is numbered with decimal number for position in library, and number m is corresponding with binary data group, and number is stored in segmentation
In formula linear FM signal generator, the function of piece-wise linear frequency modulation generator is according to piece-wise linear FM signal model
Generate corresponding piece-wise linear FM signal waveform.
The present invention constructs piece-wise linear frequency modulation generator, and the function of piece-wise linear frequency modulation generator is according to known point
Segmentation linear FM signal model generates corresponding piece-wise linear FM signal waveform.
(3) it generates piece-wise linear frequency modulation (PLFM) signal: array to be transmitted input piece-wise linear FM signal is produced
In raw device, piece-wise linear FM signal is generated according to array to be transmitted and piece-wise linear FM signal model, and by the letter
Number as reference signal transmission into the matched filter in radar detection processing module, process of pulse-compression is participated in.
(4) emit pulse-modulated signal: by piece-wise linear frequency modulation while reference signal is passed to matched filter
Signal is input to pulse-modulator, the piece-wise linear FM signal after generating impulse modulation, abbreviation pulse-modulated signal, by arteries and veins
Modulated signal is input in radar transmitter, and emits the pulse-modulated signal.
(5) receives echo-signal: radar receiver receives echo, and the echo of piece-wise linear FM signal is inputted respectively
Into radar detection processing module and radar communication data demodulation processing module, in radar-communication integration system, radar is visited
Surveying processing module is the module in system for radar detection detection, generally there is matched filter, the composition such as Doppler filter
Part.Radar communication data demodulation processing module is to obtain the module of radar communication data for demodulating in system.
(6) distance and speed of detection radar target: the piece-wise linear tune that radar detection processing module will first receive
The echo-signal of frequency signal is input to matched filter and carries out process of pulse-compression, obtains the distance of radar target, then by pulse
Signal input Doppler filter group after compression processing carries out moving-target detection MTD processing, obtains the speed of radar target.
(7) demodulation obtains radar communication data: while the work of radar detection processing module, that is, obtaining radar target
While the calculating process of distance and speed, demodulation obtains the communication number carried in the echo-signal of piece-wise linear FM signal
According to.
Communication function can be increased on radar equipment using the present invention, make airborne radar detection and being integrally formed of communication
System runs it with a system, and detection and communication use the same transmitter, can greatly improve the comprehensive benefit of electronic equipment
With rate, and in data on for radar detection signal modulation, it is able to maintain preferable radar data reduction.
Embodiment 2
The radar detection of piece-wise linear FM signal and method for communication transmission are with embodiment 1, generation point described in step 3
Segmentation linear frequency modulation (PLFM) signal, comprises the following steps that
Array to be transmitted is input to piece-wise linear Wide band Chirp Waveform Generator by (3a).
(3b) determines D according to the minimum bit of array to be transmitted2Section frequency modulation rate it is positive and negative, calculation formula is as follows:
Wherein, a indicates that minimum one binary numeral of array to be sent, sign (a) indicate D2Section adjusts frequency polarity；To
Array, that is, array to be transmitted is sent, the present invention only needs to calculate interlude D2Section frequency modulation rate it is positive and negative.
(3c) is selected with the time width of the binary number reference numeral of the position the height of array to be transmitted (N-1) as P2Segment signal
Time width calculates D by time width calculation formula1And D3The time width of section linear FM signal, time width calculation formula are as follows:
δτ=(τ-τm)/2
Wherein, τmIndicate selected D2Duan Shikuan, m indicate the D2The number of Duan Shikuan, τ indicate piece-wise linear frequency modulation
Total time width of signal, δτFor D1Section, D3The time width of section.
(3d) calculates separately the frequency modulation rate of three sections of linear FM signals, and the frequency modulation rate of each segment signal is by following calculation formula
It is calculated:
Wherein, μ1、μ2、μ3Indicate D1Section, D2Section, D3The frequency modulation rate of section linear FM signal, fcIndicate piece-wise linear tune
The centre frequency of frequency signal, B respectively indicate the total bandwidth of piece-wise linear FM signal, δBFor D1Section, D3The bandwidth of segment signal,
The variable can be independently arranged according to user demand.
(3e) calculates three sections of linear FM signal carrier frequency, and the carrier frequency of each segment signal is calculated by following calculation formula
:
Wherein, fcIndicate the centre frequency of piece-wise linear FM signal, fkIndicate DkThe carrier frequency of section linear FM signal, k
For the subscript of the carrier frequency of each section of linear FM signal, 1,2,3 are successively taken.
(3f) generates piece-wise linear frequency modulation letter according to the parameter being calculated, with piece-wise linear FM signal model
Number, and be passed to the piece-wise linear FM signal of generation as reference signal in matched filter, wherein piece-wise linear tune
The model s (t) of frequency signal is as follows:
Wherein, t indicates the time, and the parameter being calculated includes μ1、μ2、μ3、f1、f2、f3、τm、τ、δτ。
Using this method for generating piece-wise linear FM signal, segmented FM signal can be simply generated, this
Kind piece-wise linear FM signal has constant envelope, is conducive to the work of Linear Amplifer, because of communication function and radar
Detecting function is to be realized with the same signal, therefore to occupy power contradictory there is no radar detection function and communication function
Problem.
The present invention passes through to D2The time width and frequency modulation polarity of section LFM signal carry out data modulation, it is made to carry communication letter
Breath, single pulse can carry multi-bit data, improve the spectrum efficiency of communication.
Embodiment 3
The radar detection of piece-wise linear FM signal and method for communication transmission are with embodiment 1-2, described in step 7
The method of demodulation radar communication data comprises the following steps that
(7a) calculates the order of echo Fourier Transform of Fractional Order, by the order being calculated setting to fractional order Fourier
It converts in demodulator.
(7b) is configured the Fourier Transform of Fractional Order of order to echo, and each order obtains on stepped-frequency signal
Range value draws order-frequency amplitude diagram corresponding with range value in order-frequency-amplitude plane.
(7c) retrieves the order dimensional coordinate values of peak point on order-frequency amplitude diagram, ties up coordinate from selected order
In select the coordinate of only one peak value D in echo obtained by coordinate transform formula μ=- cot (p pi/2)2Section linear frequency modulation letter
The frequency modulation rate of number component, wherein μ indicates echo D2The frequency modulation rate of section linear FM signal, cot indicate cotangent operation, and p indicates peak
It is worth the order dimensional coordinate values of point.
Radar communication data are calculated in (7d), and obtained binary number is stored in caching array.
The parallel data cached in array is input to parallel-to-serial converter and is converted into serial communication data by (7e), and will be serial
Communication data output.
The present invention carries out Fourier Transform of Fractional Order processing using to echo, shares signal for PLFM, communicates number
According to being only encoded to D2The frequency modulation rate of section LFM signal, Doppler frequency shift handle order without influence to Fourier Transform of Fractional Order, thus
The demodulating process of radar communication data in prior art can be overcome to the unstable property of Doppler, and the bit error rate is caused to increase
Problem, so that the present invention is more acurrate to the transmission of radar communication data, the bit error rate is lower, to complete pulse multi-bit data
Transmission.
Embodiment 4
With embodiment 1-3, step (7a) is described for the radar detection of piece-wise linear FM signal and method for communication transmission
The order of Fourier Transform of Fractional Order be to be calculated by following formula:
Wherein, piIndicate that the order of i-th of echo Fourier Transform of Fractional Order, i successively take 0,1 ..., 2K- 1, K indicate every
The binary data number that a pulse is sent, K and N take identical numerical value, and arccot indicates arc cotangent operation, and B indicates segmented line
The total bandwidth of property FM signal, τjJ-th of time width in segmentation time width library is indicated, as i < 2K-1When, j takes 0,1 ..., and 2K-1- 1,
When i >=2K-1When, j takes 0,1 ..., and 2K-1- 1, π indicate pi.
The present invention passes through to D2The time width and frequency modulation polarity of section LFM signal carry out data modulation, so that it is carried radar logical
Letter information, the above mathematical model is by piece-wise linear FM signal D2The rank of section LFM signal time width and Fourier Transform of Fractional Order
It is secondary to connect, make to carry out the possibility that demodulation has realization using Fourier Transform of Fractional Order.
Embodiment 5
Radar detection and method for communication transmission based on piece-wise linear FM signal are the same as embodiment 1-4, step (7d) institute
Radar communication data are calculated in description, comprise the following steps that
(7d1) is according to the D in echo2Section the positive and negative of linear FM signal frequency modulation rate can determine a bit binary number,
When frequency modulation rate is positive number, binary number 1 is obtained, when frequency modulation rate is negative, obtains binary number 0.This bit-binary
Number is the radar communication data bit binary number therein that demodulation obtains.
(7d2) is retrieved and D in echo in time width library2The equal time width of the when width values of segment signal, each D2Section LFM time width
A corresponding decimal code, takes out corresponding time width number, converts corresponding binary number for decimal number number, obtains
The binary number of N-1 bit, wherein D2What the time width formula of section was calculated by following formula:
Wherein, τmIndicate D in echo2The time width of section linear FM signal, m indicate the D2Section linear FM signal time width
Decimal code, μ indicate D in echo2The frequency modulation rate of section linear FM signal, B indicate echo piece-wise linear FM signal
Total bandwidth, | | indicate the operator that takes absolute value.
(7d3) minimum first using a bit binary number obtained by step (7d1) as radar communication array, step
High N-1 as radar communication array of N-1 bit binary number obtained by (7d2), piece together one for obtained binary number
A to have N bit array, which is exactly the radar communication data of write band in echo.
As demodulation piece-wise linear FM signal and the important step of radar communication data is obtained, present invention use is tabled look-up
Method obtains radar communication data, realizes simple, and calculation amount is small, is advantageously implemented the real-time place of radar-communication integration system
Reason.
A more specifical example is given below, the present invention is further described
Embodiment 6
Radar detection and method for communication transmission based on piece-wise linear FM signal are with embodiment 1-5, referring to Fig.1, this
The specific implementation step of invention is as follows:
Step 1, radar communication data prediction.
Radar communication serial data to be transmitted is divided into multiple arrays by radar emission end, have in each array N number of two into
Data processed.N indicates the binary data number that each pulse is sent, and is determined, is pressed by message transmission rate and pulse repetition period
It is calculated according to following formula:
N=[LPRI]
Wherein, L indicates message transmission rate, and PRI indicates that pulse repetition period, [] indicate floor operation, indicates dot product
Operation.
By taking N=3 as an example, radar communication serial data 0,1,1,0,1,0,1,0,0,0,0,1 ... to be transmitted is grouped into
[0,1,1], [0,1,0], [1,0,0], [0,0,1] ....
Serial date transfer after grouping is converted into parallel data to deserializer, obtains data group to be transmitted,
[011], [010], [100], [001] ....
Step 2, linear frequency-modulated parameter is set.
In Linear Frequency Modulation signal generator, the centre frequency f an of linear FM signal is setc, total time width τ and total band
Wide B, the first of piece-wise linear FM signal and third segment signal bandwidth δB, one include equally spaced 2M-1A time width
The time width library of piece-wise linear FM signal second segment linear FM signal, M indicate the binary data that each pulse is sent
Number, M and N take identical value, it is numbered according to position of the time width in time width library,And it is full
Sufficient τm=τ m/M, and, time width τ as N=3 in time width library corresponding with binary data group will be numbered0,τ1,τ2,τ3, respectively
With 00,01,10,11 is corresponding.
Step 3, piece-wise linear FM signal is generated
Data group to be transmitted is input to linear FM signal generator, selection and high N-1 of the numerical value pair of data group
The second segment linear FM signal time width that should be numbered is determined the tune of piece-wise linear FM signal by minimum one numerical value of array
Frequently dominant sign (a), relationship are shown below:
Wherein, a indicates minimum one numerical value of array.When array is 011, time width τ is selected1, the dominant selection of frequency modulation
Just.
Centre frequency f by the linear FM signal setc, total time width τ and total bandwidth B, piece-wise linear frequency modulation letter
Number first and third segment signal bandwidth δB, the centre frequency and frequency modulation rate of three sections of linear FM signals is calculated as follows:
Wherein, μ1、μ2、μ3Indicate the frequency modulation rate of first, second, third section of linear FM signal, fkIndicate that kth section is linear
The carrier frequency of FM signal, fc, τ, B respectively indicate the centre frequency, total time width and total bandwidth of piece-wise linear FM signal, δBFor
The first, the bandwidth of third section linear FM signal, τmIndicate selected second segment time width, δτFor the first, time width of third section,
By formula δτ=(τ-τm)/2 calculate.
Linear FM signal generator is by the frequency modulation rate μ for three sections of linear FM signals being calculated1、μ2、μ3, Yi Jizai
Frequency f1、f2、f3, generate piece-wise linear FM signal s (t), the piece-wise linear FM signal of generation be input to matched filtering
Device, as the reference signal of matched filter, the model of piece-wise linear FM signal be may be expressed as:
Step 4, transmitting and reception pulse-modulated signal.
Piece-wise linear FM signal is input to pulse-modulator, being modulated at pulse width is τ, and the pulse repetition period is
In the pulse of PRI, generate impulse modulation after multicarrier linear FM signal, pulse-modulated signal is input to radar transmitter
In, and emit the pulse-modulated signal.
The echo s'(t of radar receiver reception pulse-modulated signal), echo includes radar target apart from time delay t1With
Doppler frequency shift fd, echo s'(t) is separately input to radar detection processing module and radar communication data demodulation processing module
In.
Step 5, the distance and speed of detection radar target.
Received echo is input to matched filter by radar detection processing module, process of pulse-compression is carried out, when obtaining
Between range value on sampled point, when m- amplitude plane draw corresponding with range value when m- map of magnitudes.
When m- map of magnitudes on retrieve the time dimensional coordinate values t of peak point1, by coordinate transform formula R=ct1/ 2, it obtains
The distance of radar target, wherein R indicates the distance of radar target, and c indicates the light velocity, t1Indicate the time dimensional coordinate values of peak point.
The processing result of matched filter is input to Doppler filter group, moving-target detection MTD processing is done, when obtaining
Between range value on sampled point and stepped-frequency signal, the m- frequency when T/F-amplitude plane draws corresponding with range value
Rate-map of magnitudes.
The frequency dimensional coordinate values f of peak point is retrieved in T/F-map of magnitudesd, by coordinate transform formula v=λ fd/ 2,
Obtain the speed of radar target, wherein v indicates the speed of radar target, and λ indicates the wavelength of pulse-modulated signal, fdIndicate peak
It is worth the frequency dimensional coordinate values of point.
Step 6, radar communication data are demodulated.
According to the following formula, the order for calculating echo Fourier Transform of Fractional Order, by the order setting after calculating to fractional order Fu
In in leaf transformation demodulator:
Wherein, piIndicate that the order of i-th of echo Fourier Transform of Fractional Order, i successively take 0,1 ..., 2K- 1, K indicate every
The binary data number that a pulse is sent, K and N take identical numerical value, and arccot indicates arc cotangent operation, and B indicates segmented line
The total bandwidth of property FM signal, τjJ-th of time width in segmentation time width library is indicated, as i < 2K-1When, j takes 0,1 ..., and 2K-1- 1,
When i >=2K-1When, j takes 0,1 ..., and 2K-1- 1, π indicate pi.
Received echo is input in Fourier Transform of Fractional Order demodulator by radar communication data processing module, to echo
It is configured the Fourier Transform of Fractional Order processing of order, the range value on stepped-frequency signal is obtained in each order, in rank
Secondary-frequency-amplitude plane draws order-frequency amplitude diagram corresponding with range value.
The order dimensional coordinate values p that peak point is retrieved on order-frequency amplitude diagram, by coordinate transform formula μ=- cot (p
Pi/2), obtain the frequency modulation rate of second segment linear FM signal in echo, wherein μ indicates subcarrier linear FM signal in echo
The frequency modulation rate of component, cot indicate cotangent operation, and p indicates the order dimensional coordinate values of peak point.
Minimum one of array is determined by the symbol of the frequency modulation rate of second segment linear FM signal, if positive number, then array
Minimum one is 1；If negative, then array minimum one is 0.According to the following formula calculate second segment linear FM signal when
It is wide:
Wherein, τmIndicate the time width of second segment linear FM signal in echo, μ indicates second segment linear frequency modulation letter in echo
Number frequency modulation rate, B indicate echo piece-wise linear FM signal total bandwidth.
From the time width library of the second segment signal of piece-wise linear FM signal, resulting second segment is calculated in retrieval and echo
The equal time width of the time width of linear FM signal takes out the tune frequency number pair obtained with retrieval by the corresponding relationship in step 2
The radar communication binary number answered, as high M-1 of array.
By taking N=3 as an example, the frequency modulation rate of second segment linear FM signal is positive number, and minimum one of radar communication array is
1, calculating gained time width is τ1, then high two binary numbers are 01, and it is 011 that last split, which obtains radar communication array,.
Parallel data in data group is input to parallel-to-serial converter and is converted into serial data, and serial data is exported.
The present invention utilizes the low spy of the linear FM signal correlation of different frequency modulation rates in radar-communication integration system
Property, it designs a kind of piece-wise linear frequency modulation with permanent envelope and fixed-bandwidth and shares signal, i.e., three sections of continuous relationship between frequency and time
LFM signal makes it carry the communication information by the time width and the progress data modulation of frequency modulation polarity to second segment LFM signal, at
For that can detect target and transmit the shared signal of data.
Technical effect of the invention is explained again below with reference to emulation experiment.
Embodiment 8
The radar detection of piece-wise linear FM signal and method for communication transmission with embodiment 1-7,
Simulated conditions and content:
The PLFM for simulating single goal respectively shares the processing result that signal echo carries out pulse pressure and MTD, wherein emulation ginseng
Number: total bandwidth B=20MHz, total μ s of time width τ=10, duty ratio 10%, δB=0.75B, target component [5000m, 50m/s], by
In the δ of settingB> 0.5B, the first secondary lobe are lower than -13dB.The time width library [2.5 5.0 7.5 of piece-wise linear FM signal
10.0] μ s simulation software environment is 7 32bit of Pentium (R) Dual-Core CPU E5200@2.50GHz, Windows behaviour
Make the Matlab R2010a under system.
Each pulse sends 3 modulation datas, and binary modulated data group 000~111, high two are corresponding in turn to time width
4 time widths in library, minimum one determines the frequency modulation polarity of its second segment LFM, and such as 011 to select corresponding frequency modulation rate be τ1=
5.0 μ s, homophony frequency polarity are positive.
Emulation content and interpretation of result:
Emulation 1: echo is handled to obtain the distance and speed of radar target.
The piece-wise linear FM signal modulated with method exemplary pulse of the invention, to signal be added target apart from when
Prolong with its echo-signal of Simulation of Doppler Shift, by the overturning conjugated signal of echo and current reference signal progress convolution algorithm imitate
Time dimension coordinate is converted into dimension coordinate, process of pulse-compression result analogous diagram such as Fig. 2, Fig. 2 by true matched filter
Abscissa is to have an apparent peak value at 5000, and abscissa is distance dimension, and ordinate is corresponding amplitude, visible in figure to use this hair
The distance of bright detected target is 5000m, i.e. coordinate value in Fig. 2 where peak value, this and the target range one being arranged in emulation
It causes, demonstrating the present invention has distance measurement function, so that there is no the detections for reducing radar after illustrating to have modulated radar communication data
Performance.
After convolution algorithm result is carried out moving-target detection MTD simulation process, obtained data draw in a two dimensional by when
Between dimension coordinate be converted into distance dimension coordinate, frequency dimension coordinate be converted into speed dimension coordinate, moving-target detect MTD processing result emulation
X-axis indicates that distance dimension, Y-axis indicate that speed is tieed up in figure such as Fig. 3 Fig. 3, and Z coordinate indicates corresponding amplitude, as seen from Figure 3,
There is apparent peak value when being 50 in speed dimension coordinate, this is also consistent with the speed being arranged in simulated conditions, and peak amplitude is higher,
Secondary lobe is lower to illustrate that the present invention ties up the ability for finding target after modulation data there is no reduction radar in Doppler.
Emulation 2: Fourier Transform of Fractional Order is carried out to echo and demodulates radar communication data.
8 orders of echo Fourier Transform of Fractional Order are calculated by the time width library of piece-wise linear FM signal, take
The echo of one pulse repetition period length carries out 8 Fourier Transform of Fractional Order, data is drawn in three-dimensional figure, and by rank
Number dimension coordinates be converted into number dimension coordinate, Fourier Transform of Fractional Order result analogous diagram such as Fig. 4, as seen from Figure 4, pulse tune
The radar communication data of signal transmission processed are 011, complete the transmission of pulse multi-bit data.
In brief, the radar detection and method for communication transmission disclosed by the invention based on piece-wise linear FM signal,
Solving reduces radar detection target range and speed ability after modulating communication data in radar signal in prior art, with
And there is technical issues that be unfavorable for.Specific steps include: 1, radar communication data prediction, 2, setting segmented
Linear frequency-modulated parameter, 3, generation piece-wise linear FM signal, 4, transmitting pulse-modulated signal, 5, reception impulse modulation letter
Number, 7, the distance and speed of detection radar target, 7, demodulation radar communication data.The present invention designs a kind of with permanent envelope and solid
The piece-wise linear FM signal for determining bandwidth passes through the time width and frequency modulation polarity progress data tune to second segment linear FM signal
System, makes it carry the communication information, becomes the shared signal that can be detected target and transmit data.The present invention is maintaining existing skill
The advantages of art does not reduce radar detection target range and speed ability after modulating communication data in radar signal simultaneously, overcomes
Its because communication bandwidth changes be unfavorable for Linear Amplifer the shortcomings that.The present invention solves normal pulsed signal can existing distance
Fuzzy problem overcomes the shortcomings that occupying power and radar detection occupancy power contradiction there are communications in prior art, passes
Defeated more acurrate, the bit error rate is lower, the detection and communications for radar-communication integration system.
Claims (5)
1. a kind of radar detection and method for communication transmission based on piece-wise linear FM signal, comprises the following steps that
(1) radar communication data prediction: by communication data serioparallel exchange pending and being grouped, obtain several with the position N two into
The array to be transmitted of number processed；
(2) piece-wise linear Wide band Chirp Waveform Generator is constructed, piece-wise linear FM signal initiation parameter: segmented line is set
The input of property Wide band Chirp Waveform Generator is array to be transmitted, and output is the continuous three-stage linear FM signal of relationship between frequency and time, when
The continuous three-stage linear FM signal of frequency relationship is from left to right successively denoted as D1、D2、D3；
Initiation parameter is set in piece-wise linear Wide band Chirp Waveform Generator, the centre frequency of a linear FM signal is set
fc, linear FM signal total bandwidth B and linear frequency modulation wave total time width τ, one include equally spaced 2M-1A time width it is linear
The time width library of FM signal, M indicate the binary data number that each pulse is sent, and M is equal to N, according to time width in time width library
Position time width is numbered with decimal number, and it is number m is corresponding with binary data group；
(3) it generates piece-wise linear frequency modulation (PLFM) signal: array to be transmitted is inputted into piece-wise linear Wide band Chirp Waveform Generator
In, piece-wise linear FM signal is generated according to array to be transmitted and piece-wise linear FM signal model, and the signal is made
It is reference signal transmission into the matched filter in radar detection processing module；
(4) emit pulse-modulated signal: while piece-wise linear FM signal is input to pulse-modulator, generate impulse modulation
Pulse-modulated signal is input in radar transmitter, concurrently by piece-wise linear FM signal afterwards, abbreviation pulse-modulated signal
Penetrate the pulse-modulated signal；
(5) receives echo-signal: radar receiver receives echo, and the echo of piece-wise linear FM signal is separately input to thunder
Up in detection processing module and radar communication data demodulation processing module；
(6) distance and speed of detection radar target: radar detection processing module first believes the piece-wise linear frequency modulation received
Number echo-signal be input to matched filter carry out process of pulse-compression, obtain the distance of radar target, then pulse is compressed
Signal input Doppler filter group that treated carries out moving-target detection MTD processing, obtains the speed of radar target；
(7) demodulation obtains radar communication data: while the work of radar detection processing module, that is, obtaining the distance of radar target
While with the calculating process of speed, demodulation obtains the communication data carried in the echo-signal of piece-wise linear FM signal.
2. the method according to claim 1 that radar detection and communications are realized based on piece-wise linear FM signal,
It is characterized by: generation piece-wise linear frequency modulation (PLFM) signal described in step 3, comprises the following steps that
Array to be transmitted is input to piece-wise linear Wide band Chirp Waveform Generator by (3a)；
(3b) determines D according to the minimum bit of array to be transmitted2Section frequency modulation rate it is positive and negative, calculation formula is as follows:
Wherein, a indicates that minimum one binary numeral of array to be sent, sign (a) indicate D2Section adjusts frequency polarity；
(3c) is selected with the time width of the binary number reference numeral of the position the height of array to be transmitted (N-1) as D2The time width of segment signal,
D is calculated by time width calculation formula1And D3The time width of section linear FM signal, time width calculation formula are as follows:
δτ=(τ-τm)/2
Wherein, τmIndicate selected D2Duan Shikuan, m indicate the D2The number of Duan Shikuan, τ indicate piece-wise linear FM signal
Total time width, δτFor D1Section, D3The time width of section；
(3d) calculates separately the frequency modulation rate of three sections of linear FM signals, and the frequency modulation rate of each segment signal is calculated by following calculation formula
It obtains:
Wherein, μ1、μ2、μ3Indicate D1Section, D2Section, D3The frequency modulation rate of section linear FM signal, fcIndicate piece-wise linear FM signal
Centre frequency, B respectively indicate the total bandwidth of piece-wise linear FM signal, δBFor D1Section, D3The bandwidth of segment signal, the variable
It can be independently arranged according to user demand；
(3e) calculates three sections of linear FM signal carrier frequency, and the carrier frequency of each segment signal is calculated by following calculation formula:
Wherein, fcIndicate the centre frequency of piece-wise linear FM signal, fkIndicate DkThe carrier frequency of section linear FM signal, k is each
The subscript of the carrier frequency of section linear FM signal, successively takes 1,2,3；
(3f) generates piece-wise linear FM signal according to the parameter being calculated, with piece-wise linear FM signal model,
And wherein piece-wise linear frequency modulation letter is passed in matched filter using the piece-wise linear FM signal of generation as reference signal
Number model s (t), it is as follows:
Wherein, t indicates the time.
3. the radar detection and method for communication transmission according to claim 1 based on piece-wise linear FM signal, special
Sign is that the method that radar communication data are demodulated described in step 7 comprises the following steps that
(7a) calculates the order of echo Fourier Transform of Fractional Order, by the order being calculated setting to Fourier Transform of Fractional Order
In demodulator；
(7b) is configured the Fourier Transform of Fractional Order of order to echo, and each order obtains the amplitude on stepped-frequency signal
Value, draws order-frequency amplitude diagram corresponding with range value in order-frequency-amplitude plane；
(7c) retrieves the order dimensional coordinate values of peak point on order-frequency amplitude diagram, selects from selected order dimension coordinate
The coordinate of only one peak value out obtains D in echo by coordinate transform formula μ=- cot (p pi/2)2Section linear FM signal point
The frequency modulation rate of amount, wherein μ indicates echo D2The frequency modulation rate of section linear FM signal, cot indicate cotangent operation, and p indicates peak point
Order dimensional coordinate values；
Radar communication data are calculated in (7d), and obtained binary number is stored in caching array；
The parallel data cached in array is input to parallel-to-serial converter and is converted into serial communication data by (7e), and by serial communication
Data output.
4. the radar detection and method for communication transmission according to claim 3 based on piece-wise linear FM signal, special
Sign is that the order of Fourier Transform of Fractional Order described in step (7a) is calculated by following formula:
Wherein, piIndicate that the order of i-th of echo Fourier Transform of Fractional Order, i successively take 0,1 ..., 2K- 1, K indicate each arteries and veins
The binary data number sent is rushed, K and N take identical numerical value, and arccot indicates arc cotangent operation, and B indicates piece-wise linear tune
The total bandwidth of frequency signal, τjJ-th of time width in segmentation time width library is indicated, as i < 2K-1When, j takes 0,1 ..., and 2K-1- 1, when i >=
2K-1When, j takes 0,1 ..., and 2K-1- 1, π indicate pi.
5. the radar detection and method for communication transmission according to claim 3 based on piece-wise linear FM signal, special
Sign is, radar communication data are calculated described in step (7d) and comprise the following steps that
(7d1) is according to the D in echo2Positive and negative determination 1 binary number of section linear FM signal frequency modulation rate, when frequency modulation rate is
When positive number, binary digit 1 is obtained, when frequency modulation rate is negative, obtains binary number 0；
(7d2) retrieval and D in echo in time width library2The equal segmentation time width of the when width values of segment signal, taking-up are obtained with retrieval
Time width number converts corresponding binary number for decimal number number, obtains N-1 binary numbers, wherein D2Section when
What wide formula was calculated by following formula:
Wherein, τmIndicate D in echo2The time width of section linear FM signal, m indicate the D2The number of section linear FM signal time width,
μ indicates D in echo2The frequency modulation rate of section linear FM signal, B indicate the total bandwidth of echo piece-wise linear FM signal, | |
Expression takes absolute value operator.
Obtained binary number is pieced together the radar communication array for having N bit by (7d3), by step (7d1)
Minimum first as radar communication array of gained binary number, binary number obtained by step (7d2) is as radar communication number
High N-1 of group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810765084.6A CN108957412A (en) | 2018-07-12 | 2018-07-12 | Radar detection and method for communication transmission based on piece-wise linear FM signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810765084.6A CN108957412A (en) | 2018-07-12 | 2018-07-12 | Radar detection and method for communication transmission based on piece-wise linear FM signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108957412A true CN108957412A (en) | 2018-12-07 |
Family
ID=64483152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810765084.6A Pending CN108957412A (en) | 2018-07-12 | 2018-07-12 | Radar detection and method for communication transmission based on piece-wise linear FM signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108957412A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085543A (en) * | 2018-08-24 | 2018-12-25 | 瑞达微（北京）科技有限责任公司 | LFM waveforms generator |
| CN109660476A (en) * | 2018-12-24 | 2019-04-19 | 中国电子科技集团公司第五十四研究所 | It is a kind of to wirelessly communicate and radar detection common mode system |
| CN110488228A (en) * | 2019-07-11 | 2019-11-22 | 中国科学院电子学研究所 | Linear FM signal generation method, device and storage medium |
| CN111682881A (en) * | 2020-06-17 | 2020-09-18 | 北京润科通用技术有限公司 | Communication reconnaissance simulation method and system suitable for multi-user signals |
| CN111812630A (en) * | 2020-07-23 | 2020-10-23 | 桂林电子科技大学 | System and method for detecting target and estimating DOA (direction of arrival) of external radiation source radar when interference remains |
| CN111965647A (en) * | 2020-08-05 | 2020-11-20 | 江苏科技大学 | Road condition detection method based on radar communication integration |
| CN112134821A (en) * | 2020-08-24 | 2020-12-25 | 北京智芯微电子科技有限公司 | Modulation method based on linear frequency modulation signal and modulator |
| CN113625269A (en) * | 2021-08-26 | 2021-11-09 | 长沙理工大学 | High-speed railway steel rail settlement detection method and system based on millimeter wave radar |
| CN113885008A (en) * | 2021-09-14 | 2022-01-04 | 天津理工大学 | High-speed photon echo signal generation method based on segmented coding pulse modulation |
| CN114415122A (en) * | 2022-01-27 | 2022-04-29 | 电子科技大学 | High-speed target accumulation detection method based on frequency domain segmentation processing |
| CN114545334A (en) * | 2022-01-06 | 2022-05-27 | 西安电子科技大学 | Radar target detection method and system based on electromagnetic space-time identification |
| CN114640564A (en) * | 2020-12-16 | 2022-06-17 | 清华大学 | Method and system for generating orthogonal segmented continuous frequency modulation wave |
| CN114879191A (en) * | 2022-07-13 | 2022-08-09 | 中国科学院空天信息创新研究院 | Pulse compression method of segmented linear frequency modulation SAR |
| CN115061092A (en) * | 2022-06-17 | 2022-09-16 | 陕西长岭电子科技有限责任公司 | Pulse radar signal processing method based on integration of measurement and communication functions |
| CN115280176A (en) * | 2020-03-13 | 2022-11-01 | 华为技术有限公司 | Method and apparatus for communication and sensing in a wireless communication network operating in half-duplex mode |
| CN116635747A (en) * | 2020-08-21 | 2023-08-22 | 艾瓦公司 | Selective subband processing for angular resolution and detection sensitivity in LIDAR systems |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040059225A1 (en) * | 2002-09-24 | 2004-03-25 | Xiaohui Hao | Method and apparatus to enhance ultrasound contrast imaging using stepped-chirp waveforms |
| CN105162742A (en) * | 2015-07-28 | 2015-12-16 | 西安空间无线电技术研究所 | Asymmetric triangle frequency modulation radar communication integrated signal waveform determination method |
| CN105227246A (en) * | 2015-10-13 | 2016-01-06 | 哈尔滨工程大学 | A kind of underwater acoustic communication method utilizing segmentation LFM signal to imitate dolphin whistle signal |
| RU2578126C1 (en) * | 2014-12-08 | 2016-03-20 | Федеральное государственное казенное военное образовательное учреждение высшего профессионального образования "Военный учебно-научный центр Военно-воздушных сил "Военно-воздушная академия имени профессора Н.Е. Жуковского и Ю.А. Гагарина" (г. Воронеж) Министерства обороны Российской Федерации | Method of forming radar images |
| CN106772350A (en) * | 2017-01-16 | 2017-05-31 | 西安电子科技大学 | The method that radar detection and communications are realized based on linear FM signal |
| CN107786480A (en) * | 2017-09-28 | 2018-03-09 | 清华大学 | Radar-communication integration signal creating method and device |
-
2018
- 2018-07-12 CN CN201810765084.6A patent/CN108957412A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040059225A1 (en) * | 2002-09-24 | 2004-03-25 | Xiaohui Hao | Method and apparatus to enhance ultrasound contrast imaging using stepped-chirp waveforms |
| RU2578126C1 (en) * | 2014-12-08 | 2016-03-20 | Федеральное государственное казенное военное образовательное учреждение высшего профессионального образования "Военный учебно-научный центр Военно-воздушных сил "Военно-воздушная академия имени профессора Н.Е. Жуковского и Ю.А. Гагарина" (г. Воронеж) Министерства обороны Российской Федерации | Method of forming radar images |
| CN105162742A (en) * | 2015-07-28 | 2015-12-16 | 西安空间无线电技术研究所 | Asymmetric triangle frequency modulation radar communication integrated signal waveform determination method |
| CN105227246A (en) * | 2015-10-13 | 2016-01-06 | 哈尔滨工程大学 | A kind of underwater acoustic communication method utilizing segmentation LFM signal to imitate dolphin whistle signal |
| CN106772350A (en) * | 2017-01-16 | 2017-05-31 | 西安电子科技大学 | The method that radar detection and communications are realized based on linear FM signal |
| CN107786480A (en) * | 2017-09-28 | 2018-03-09 | 清华大学 | Radar-communication integration signal creating method and device |
Non-Patent Citations (3)
| Title |
|---|
| CAICAI GAO, ET AL.: "Piecewise LFM Waveform for MIMO Radar", 《IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS》 * |
| 李慧等: "基于线性调频时宽的MIMO雷达正交波形设计", 《电子与信息学报》 * |
| 王诏丰等: "一种步进MFSK调制的雷达通信共享信号设计方法", 《系统工程与电子技术》 * |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085543B (en) * | 2018-08-24 | 2020-08-18 | 斯凯瑞利（北京）科技有限公司 | Linear frequency modulation signal generator |
| CN109085543A (en) * | 2018-08-24 | 2018-12-25 | 瑞达微（北京）科技有限责任公司 | LFM waveforms generator |
| CN109660476B (en) * | 2018-12-24 | 2021-04-20 | 中国电子科技集团公司第五十四研究所 | Wireless communication and radar detection common mode system |
| CN109660476A (en) * | 2018-12-24 | 2019-04-19 | 中国电子科技集团公司第五十四研究所 | It is a kind of to wirelessly communicate and radar detection common mode system |
| CN110488228A (en) * | 2019-07-11 | 2019-11-22 | 中国科学院电子学研究所 | Linear FM signal generation method, device and storage medium |
| CN110488228B (en) * | 2019-07-11 | 2021-12-07 | 中国科学院电子学研究所 | Linear frequency modulation signal generation method and device and storage medium |
| CN115280176A (en) * | 2020-03-13 | 2022-11-01 | 华为技术有限公司 | Method and apparatus for communication and sensing in a wireless communication network operating in half-duplex mode |
| CN111682881A (en) * | 2020-06-17 | 2020-09-18 | 北京润科通用技术有限公司 | Communication reconnaissance simulation method and system suitable for multi-user signals |
| CN111682881B (en) * | 2020-06-17 | 2021-12-24 | 北京润科通用技术有限公司 | Communication reconnaissance simulation method and system suitable for multi-user signals |
| CN111812630B (en) * | 2020-07-23 | 2022-06-21 | 桂林电子科技大学 | System and method for detecting target and estimating DOA (direction of arrival) of external radiation source radar when interference remains |
| CN111812630A (en) * | 2020-07-23 | 2020-10-23 | 桂林电子科技大学 | System and method for detecting target and estimating DOA (direction of arrival) of external radiation source radar when interference remains |
| CN111965647A (en) * | 2020-08-05 | 2020-11-20 | 江苏科技大学 | Road condition detection method based on radar communication integration |
| CN116635747A (en) * | 2020-08-21 | 2023-08-22 | 艾瓦公司 | Selective subband processing for angular resolution and detection sensitivity in LIDAR systems |
| CN112134821A (en) * | 2020-08-24 | 2020-12-25 | 北京智芯微电子科技有限公司 | Modulation method based on linear frequency modulation signal and modulator |
| CN112134821B (en) * | 2020-08-24 | 2022-01-14 | 北京智芯微电子科技有限公司 | Modulation method based on linear frequency modulation signal and modulator |
| CN114640564B (en) * | 2020-12-16 | 2024-05-14 | 清华大学 | Method and system for generating orthogonal segmentation continuous frequency modulation wave |
| CN114640564A (en) * | 2020-12-16 | 2022-06-17 | 清华大学 | Method and system for generating orthogonal segmented continuous frequency modulation wave |
| CN113625269B (en) * | 2021-08-26 | 2024-03-01 | 长沙理工大学 | High-speed railway steel rail settlement detection method and system based on millimeter wave radar |
| CN113625269A (en) * | 2021-08-26 | 2021-11-09 | 长沙理工大学 | High-speed railway steel rail settlement detection method and system based on millimeter wave radar |
| CN113885008A (en) * | 2021-09-14 | 2022-01-04 | 天津理工大学 | High-speed photon echo signal generation method based on segmented coding pulse modulation |
| CN114545334A (en) * | 2022-01-06 | 2022-05-27 | 西安电子科技大学 | Radar target detection method and system based on electromagnetic space-time identification |
| CN114415122A (en) * | 2022-01-27 | 2022-04-29 | 电子科技大学 | High-speed target accumulation detection method based on frequency domain segmentation processing |
| CN115061092A (en) * | 2022-06-17 | 2022-09-16 | 陕西长岭电子科技有限责任公司 | Pulse radar signal processing method based on integration of measurement and communication functions |
| CN114879191A (en) * | 2022-07-13 | 2022-08-09 | 中国科学院空天信息创新研究院 | Pulse compression method of segmented linear frequency modulation SAR |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108957412A (en) | Radar detection and method for communication transmission based on piece-wise linear FM signal | |
| CN106772350B (en) | The method for realizing radar detection and communications based on linear FM signal | |
| CN108768446B (en) | The signal waveform design method of low probability of intercept radar communication integrated system | |
| CN110109078A (en) | Velocity solution blur method based on coherent frequency agile radar | |
| US8059026B1 (en) | Interference avoiding transform domain radar | |
| CN111693983B (en) | Complementary waveform construction method and module, cognitive radar system and waveform emission method | |
| CN107872279B (en) | Radar communication shared signal design method based on orthogonal frequency decomposition | |
| CN106353749B (en) | A kind of super-resolution TDCSRAD communicating integral design method | |
| WO2012046419A1 (en) | Radar device | |
| WO2022246998A1 (en) | Sensing and communication integrated system based on mobile communication signal | |
| CN107783093B (en) | Method for solving distance ambiguity and distance occlusion based on single repetition frequency pulse radar | |
| CN104076351A (en) | Phase-coherent accumulation detection method for high-speed high maneuvering target | |
| CN109521417A (en) | Multi-target detection calculation method and a kind of fmcw radar waveform based on fmcw radar waveform | |
| CN112422471B (en) | Riemann flow pattern optimization-based radar communication integrated signal design method | |
| CN104569927A (en) | Radar pulse transmitter and generation method of orthogonal frequency division multiplexing (OFDM) pulse signal | |
| CN111736141A (en) | Radar communication integrated design method based on cyclic coding array | |
| US8928524B1 (en) | Method and system for enhancing data rates | |
| CN103308892A (en) | Generating and compression method for multi-frequency-scan radar signals | |
| CN111398946A (en) | Shared signal design method based on L FM signal modulation frequency modulation | |
| Gu et al. | Waveform design for integrated radar and communication system with orthogonal frequency modulation | |
| CN109061634A (en) | The Design of Signal method of OFDM radar-communication integration Mini-Unmanned Aerial Vehicles | |
| CN104062641A (en) | New method for processing OFDM radar distance image | |
| CN110927691A (en) | Low-interception radar signal design method based on multi-time coding phase modulation | |
| CN112737998B (en) | Radar communication integrated signal design method based on OCDM | |
| CN103944845B (en) | The related detecting method of entire spectrum carrier modulation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181207 |