CN110535537A - A kind of subsurface communication detection integral method - Google Patents
A kind of subsurface communication detection integral method Download PDFInfo
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- CN110535537A CN110535537A CN201910909461.3A CN201910909461A CN110535537A CN 110535537 A CN110535537 A CN 110535537A CN 201910909461 A CN201910909461 A CN 201910909461A CN 110535537 A CN110535537 A CN 110535537A
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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
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
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- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The present invention provides a kind of subsurface communication detection integral method, based on difference Pattern pattern time-delay coding (DPDS) system, choose Pattern code of the satisfactory signal as DPDS system, by modulate communications information in the time delay difference between adjacent Pattern code, using each Pattern code as active sonar detection waveform.Determine the decoding process of communication receiver communication detecting integration signal and the process flow of echo signal reception end reception target echo.Communication receiver obtains the time delay difference of each code element using copy correlator, to complete to decode；Integration signal transmitting terminal uses multicenter matching filter device, determines the Parameters variation of echo-signal, determines the distance and speed of target, to complete active sonar target acquisition.The advantage of the invention is that underwater sound communication and Underwater Detection while progress may be implemented in (1)；(2) equipment can be utilized to greatest extent；(3) working efficiency of sonar is effectively improved；(4) can real-time perfoming it is underwater it is multi-platform between collaboration detection.
Description
Technical field
The present invention relates to a kind of subsurface communications to detect integral method, belongs to underwater sound communication and Underwater Detection field.
Background technique
Communication detecting integrated technique thought derives from radar-communication integration field earliest, and land combat system is most
It is equipped with two kinds of electronic systems of radar and communication, resource-sharing can be achieved in the integration of radar communications system, dynamically can group and height
Utilizability, while system electromagnetic interference and energy consumption can be reduced, maintenance cost is reduced, to improve the synthesis of electronic system
Performance.
It is similar with land situation, it is equally faced with the demand of detection and communication under water.In recent years, underwater operation
Gradually towards information-based, group networking development, existing Sonar system has a single function mode, can not cope with become increasingly complex it is underwater
Situation.Undersea detection and underwater sound communication on current existing platform is as the independent design and use of independent equipment, and due to frequency
Compose leakage, secondary lobe influence, the presence of signal cross-talk, the effects such as electromagnetic radiation, underwater communication tended not to detection it is compatible, it is logical
The sensing capability for reducing underwater platform cannot be detected under the time slot of letter, detection while cannot communicate and weaken between platform
Collaboration capabilities.Traditional underwater acoustic detection system and communication system makes a big difference, and from the point of view of function, communication system is main
It is to be transmitted for point-to-point data, active sonar detection system is mainly to judge mesh by receiving the sound wave reflected through target
Target parameters；From the point of view of transmitting signal, the transmitting signal of active sonar detection system is impulse form, signal frequency
Rate is usually low frequency, and the setting of bandwidth and pulsewidth, which will be adjusted the distance according to system with the measurement accuracy of speed, to be determined；And communication system
The transmitting signal of system is continuously that, in order to improve traffic rate, signal frequency generally selects the broadband signal of relative high frequency.From property
From the point of view of energy evaluation index, communication system is primary concern is that transmit the capacity of data, traffic rate, confidentiality, the bit error rate
The problems such as, and active sonar detection system mainly considers maximum detection range, distance and speed resoluting force etc..
But underwater sound communication and Underwater Detection theoretical basis, system structure and in terms of have it is very strong
Similitude, this to underwater sound communication detection it is integrated realization provide possibility.And land more mature radar communication one
Body technology can not be used under water due to the complexity height of underwater acoustic channel.Therefore, how the two to be combined and is realized under water
Communication detecting integration become research topic important in underwater acoustic information technology.
Summary of the invention
It is that a platform both can be carried out water the purpose of the invention is to provide a kind of subsurface communication detection integral method
Sound communication can be carried out the integral method of Underwater Detection again simultaneously.
The object of the present invention is achieved like this:
In transmitting terminal:
(1.1) Pattern code of the satisfactory signal as DPDS system is chosen；
(1.2) it generates by adjustment parameter and frequency conversion reflection and is largely occupying identical frequency band and orthogonal broad sense closer to each other just
String FM signal is as Pattern code；
(1.3) it generates and sends data；
(1.4) pass through DPDS coded modulation communication information；
(1.5) plus after synchronization signal emit；
In communication receiver:
(2.1) first to receive signal be filtered with it is synchronous；
(2.2) channel equalization and Doppler effect correction are carried out；
(2.3) it is decoded using copy correlator；
(2.4) output information sequence；
At echo signal reception end:
(3.1) reception signal is filtered first；
(3.2) filtered echo-signal is handled using multicenter matching filter device；
(3.3) distance and velocity information of target are determined, active sonar target acquisition is completed.
The invention also includes structure features some in this way:
1. choosing satisfactory signal to refer to: the requirement of DPDS code communication should be met, and can be as actively
Sonar waveform is detected, and also be can produce and largely be occupied identical frequency band and orthogonal waveform.
2. selecting GSFM signal as Pattern code, GSFM signal function expression formula are as follows:
Wherein: rect (t) is rectangular function；T is pulsewidth；fcFor center frequency；For phase modulation function,
Expression formula are as follows:Wherein, α is modulation index, and β=B/2 α, B are the bandwidth of signal；Periodicity
It is expressed as C=α Tρ/ ρ, ρ are the dimensionless groups for controlling instantaneous frequency function shape in GSFM.
3.DPDS coding is utilized simultaneously in the time delay difference by modulate communications information between adjacent Pattern code
Pattern code carries out active sonar target acquisition as pulse, realizes subsurface communication and detection integration.
Compared with prior art, the beneficial effects of the present invention are: the present invention and traditional underwater acoustic communication method and Active Acoustic
Detection method is the difference is that reach the integrated purpose of communication detecting by the design of transmitted waveform.Transmitting terminal is with adjacent
Pattern code between time delay difference carry the communication information, while using each Pattern code as active sonar waveform progress
Target acquisition.Namely the present invention has the advantages that underwater sound communication and Underwater Detection while progress may be implemented in (1) Dan Pingtai；
(2) there is higher target detection refresh rate compared to traditional pulsed active sonar；(3) equipment can be utilized to greatest extent；
(4) working efficiency of sonar is effectively improved；(5) improve it is underwater it is multi-platform between collaboration capabilities.
Detailed description of the invention
Fig. 1 is the implementation process that subsurface communication detects integrated technique；
Fig. 2 is correlation function (a) auto-correlation function (b) cross-correlation function of GSFM signal；
Fig. 3 is the ambiguity function figure of GSFM signal；
Fig. 4 is GSFM signal compared with the Q function of other three kinds common active sonar waveforms；
The transmitted waveform structural schematic diagram of Fig. 5 communication detecting integral system；
Fig. 6 is communication ends receiver；
Fig. 7 is target echo signal receiving end testing process；
Fig. 8 is communication detecting integrative simulation scene；
Fig. 9 is the multi_path channel in Fig. 6 between AB node；
Figure 10 is system emulation communication bit error rates curve；
Figure 11 is the target echo signal of the first two Pattern code；
First treated result of Pattern code echo-signal of Figure 12；
Second treated result of Pattern code echo-signal of Figure 13.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing.
Steps are as follows by the present invention:
In transmitting terminal:
(1) Pattern code of the satisfactory signal as DPDS system is chosen；
The satisfactory signal of selection should meet the requirement of DPDS code communication, and want that Active Acoustic can be used as
Waveform is detected, and also be can produce and largely be occupied identical frequency band and orthogonal waveform.
(2) it is generated by adjustment parameter and frequency conversion transmitting and largely occupies identical frequency band and orthogonal GSFM letter closer to each other
Number；
Select GSFM signal as Pattern code, GSFM signal function expression formula are as follows:
Wherein rect (t) is rectangular function；T is pulsewidth；fcFor center frequency；For phase modulation function, expression formula are as follows:Wherein, α is modulation index, and β=B/2 α, wherein B is the bandwidth of signal；α is frequency modulation(PFM)
, which determine the periodicities for including in the instantaneous frequency function of GSFM pulse.Periodicity is represented by C=α Tρ/ ρ, ρ are
Control the dimensionless group of instantaneous frequency function shape in GSFM.It produces and occupies by changing parameter alpha or ρ and frequency conversion transmitting
Identical frequency band and orthogonal signal closer to each other.
(3) it generates and sends data；
(4) pass through DPDS coded modulation communication information；
DPDS coding is utilized simultaneously in the time delay difference by modulate communications information between adjacent Pattern code
Pattern code carries out active sonar target acquisition as pulse, realizes subsurface communication and detection integration,
(5) plus after synchronization signal emit；
In communication receiver:
(1) first to receive signal be filtered with it is synchronous；
(2) channel equalization and Doppler effect correction are carried out；
(3) it is decoded using copy correlator；
(4) output information sequence；
At echo signal reception end:
(1) reception signal is filtered first；
(2) filtered echo-signal is handled using multicenter matching filter device；
(3) distance and velocity information of target are determined, active sonar target acquisition is completed；
Fig. 1 is the flow chart of subsurface communication detection integrated technique, and referring to Fig.1, steps are as follows for realization of the invention:
Step 1: choosing, autocorrelation is good, and cross correlation is poor, and speed and distance resolution be high and anti-reverberation ability is strong
Pulse signal is as Pattern code.
The correlation of GSFM signal meets the requirement of integral system, and correlation function is as shown in Figure 2；GSFM shown in Fig. 3
Signal has the ambiguity function of " drawing pin " shape；GSFM signal has excellent anti-reverberation performance, from fig. 4, it can be seen that same
Under bandwidth and pulsewidth, the anti-reverberation performance of GSFM signal will be substantially better than common CW and LFM signal.For slower-velocity target,
GSFM signal is the optimum signal of anti-reverberation in four kinds of signals, and for high-speed target, GSFM signal is slightly worse than PN signal.
Step 2: determining the transmitting of the integrated waveform according to operating distance, the requirement of traffic rate, system bandwidth
Frame structure.It is illustrated in figure 5 the frame structure that the underwater sound communication based on DPDS system detects integrated waveform.TPFor Pattern code
Time width；TiAt the time of end for i-th of symbol；τi(i=1,2,3 ..., L) indicate Pattern code each code element window when
Prolong value.The integrated time domain waveform can be expressed asWherein,
L is different Pattern code number；PjIt (t) is j-th of Pattern code waveform.
Step 3: generating transmitting signal according to the waveform frame structure and transmitting signal expression, underwater sound communication is completed
Detect integration signal transmitting.
Step 4: designing underwater sound communication end receiver, such as Fig. 6 according to the waveform frame structure and transmitting signal expression
It show underwater acoustic communication receiver.Receive signal by filtering with it is synchronous after, slided using original Pattern code with it
Related operation, according to the position of l-th symbol Pattern code relevant peaks and its previous symbol Pattern code correlation peak location
Difference, then subtract Pattern code pulsewidth TPThe time delay value τ of l-th symbol carrying can be acquiredL。
Step 5: according to the waveform frame structure and transmitting signal expression design object echo reception machine, such as Fig. 7 institute
It is shown as the testing process of receiver.To avoid not receiving target echo, Ying Caiyong bistatic transducing when transmitting signals
Device, and receiving-transmitting sides should have enough isolations.After bandpass filtering, echo letter is determined with multicenter matching filter device
Target component in number is adjudicated the presence or absence of target by Threshold detection, and then determines the distance and speed of target, and master is completed
Dynamic sonar target detection.
2, simulation study:
Simulated conditions:
For simulating scenes as shown in figure 8, wherein A node is bistatic system, A1 is non-direction transmitting transducer, A2
For eight yuan of horizontal reception linear arrays, array element spacing is 0.5m.B node is a hexa-atomic vertical reception battle array, array element spacing 0.5m, A and B
Node spacing 500m；Assuming that target 1 is diametrically still in the position of distance A node 300m, target 2 be diametrically still in away from
Position from A node 600m.In A node receiving end, the echo strength of target 1 is 25dB, and the echo strength of target 2 is 16dB.
Pattern code of the orthogonal GSFM waveform of 20 pulsewidth T=0.25s as DPDS system is chosen in this emulation, owns
GSFM signal occupies the bandwidth (Full-Band) of system completely, makes them close to just by adjustment parameter α or ρ and frequency conversion scattering
It hands over.Bandwidth B=4KHz of system, centre frequency fc=3KHz.Each code element carries 6bit information, minimum code when DPDS is encoded
Quantized interval is 4ms, and the maximum scramble time is 0.252s.The multi_path channel shock response used between AB node in this emulation
Function is as shown in Figure 9.
Figure 10 is communication simulation result, it can be seen that the present invention has better communication performance under simulated conditions, should
System not only has stronger anti-noise jamming ability, but also has and stablize due to the orthogonality between different pattern codes
Anti multi path interference ability.
Figure 11 is the echo-signal (only providing the first two Pattern code) of two targets.Figure 12 and 13 is returning in Figure 11
Wave signal is by the output of multicenter matching filter device results, it can be seen that obtaining by the processing to two echo-signals
Target component is consistent with preset parameter.Due to the overlapping between excellent orthogonality difference Pattern code to signal at
The influence very little of result is managed, two Pattern codes all preferably complete the Detection task of the distance and speed to multiple targets.
To sum up, the invention discloses a kind of subsurface communications to detect integral method, belongs to water sound communication technique and the underwater sound is visited
Survey technology field.The technical scheme is that: it is based on difference Pattern pattern time-delay coding (DPDS) body
System, chooses Pattern code of the satisfactory signal as DPDS system, by modulate communications information in adjacent Pattern code
Between time delay difference in, using each Pattern code as active sonar detection waveform.Determine communication receiver communication detecting one
The decoding process of body signal and echo signal reception end receive the process flow of target echo.Communication receiver is using copy phase
The time delay difference that device obtains each code element is closed, to complete to decode；Integration signal transmitting terminal uses multicenter matching filter device,
The Parameters variation for determining echo-signal, determines the distance and speed of target, to complete active sonar target acquisition.The present invention
The advantages of be that underwater sound communication and Underwater Detection while progress may be implemented in (1)；(2) equipment can be utilized to greatest extent；(3)
Effectively improve the working efficiency of sonar；(4) can real-time perfoming it is underwater it is multi-platform between collaboration detection.
Claims (5)
1. a kind of subsurface communication detects integral method, it is characterised in that:
In transmitting terminal:
(1.1) Pattern code of the satisfactory signal as DPDS system is chosen；
(1.2) it generates by adjustment parameter and frequency conversion reflection and largely occupies identical frequency band and orthogonal broad sense sine tune closer to each other
Frequency signal is as Pattern code；
(1.3) it generates and sends data；
(1.4) pass through DPDS coded modulation communication information；
(1.5) plus after synchronization signal emit；
In communication receiver:
(2.1) first to receive signal be filtered with it is synchronous；
(2.2) channel equalization and Doppler effect correction are carried out；
(2.3) it is decoded using copy correlator；
(2.4) output information sequence；
At echo signal reception end:
(3.1) reception signal is filtered first；
(3.2) filtered echo-signal is handled using multicenter matching filter device；
(3.3) distance and velocity information of target are determined, active sonar target acquisition is completed.
2. subsurface communication according to claim 1 detects integral method, it is characterised in that: choose satisfactory signal
Refer to: the requirement of DPDS code communication should be met, and want to be detected as active sonar waveform, also can produce big
Amount occupies identical frequency band and orthogonal waveform.
3. subsurface communication according to claim 1 or 2 detects integral method, it is characterised in that: GSFM signal is selected to make
For Pattern code, GSFM signal function expression formula are as follows:
Wherein: rect (t) is rectangular function；T is pulsewidth；fcFor center frequency；For phase modulation function, expression formula
Are as follows:Wherein, α is modulation index, and β=B/2 α, B are the bandwidth of signal；Periodicity is expressed as
C=α Tρ/ ρ, ρ are the dimensionless groups for controlling instantaneous frequency function shape in GSFM.
4. subsurface communication according to claim 1 or 2 detects integral method, it is characterised in that: DPDS coding is will to lead to
Letter information is modulated in the time delay difference between adjacent Pattern code, while being carried out actively using Pattern code as pulse
Subsurface communication and detection integration are realized in sonar target detection.
5. subsurface communication according to claim 3 detects integral method, it is characterised in that: DPDS coding is will to communicate letter
Breath is modulated in the time delay difference between adjacent Pattern code, while carrying out active sonar as pulse using Pattern code
Subsurface communication and detection integration are realized in target acquisition.
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Cited By (9)
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| CN111342949A (en) * | 2020-02-19 | 2020-06-26 | 西北工业大学 | Synchronous detection method for underwater acoustic mobile communication |
| CN112152951A (en) * | 2020-11-25 | 2020-12-29 | 鹏城实验室 | Underwater acoustic communication detection method, device, equipment and storage medium |
| CN112152959A (en) * | 2020-11-25 | 2020-12-29 | 鹏城实验室 | Underwater acoustic communication detection signal processing method, device, equipment and storage medium |
| CN113311499A (en) * | 2021-05-13 | 2021-08-27 | 中国科学院声学研究所 | UUV detection wave generation method and device, UUV and waveform generator |
| CN113452640A (en) * | 2021-06-02 | 2021-09-28 | 上海交通大学 | Multi-carrier-based detection and communication integrated system |
| CN115208484A (en) * | 2022-07-01 | 2022-10-18 | 哈尔滨工程大学 | Cross-ice medium acoustic communication method |
| CN115333645A (en) * | 2022-08-12 | 2022-11-11 | 厦门市声盛海洋工程有限公司 | Multi-path diversity method and system for communication sonar |
| RU2807328C1 (en) * | 2023-02-13 | 2023-11-14 | Акционерное Общество "Концерн "Океанприбор" | Method for detecting synchronization signal of broadband hydroacoustic communication system |
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| CN111342949A (en) * | 2020-02-19 | 2020-06-26 | 西北工业大学 | Synchronous detection method for underwater acoustic mobile communication |
| CN112152951A (en) * | 2020-11-25 | 2020-12-29 | 鹏城实验室 | Underwater acoustic communication detection method, device, equipment and storage medium |
| CN112152959A (en) * | 2020-11-25 | 2020-12-29 | 鹏城实验室 | Underwater acoustic communication detection signal processing method, device, equipment and storage medium |
| CN112152959B (en) * | 2020-11-25 | 2021-02-23 | 鹏城实验室 | Underwater acoustic communication detection signal processing method, device, equipment and storage medium |
| WO2022110409A1 (en) * | 2020-11-25 | 2022-06-02 | 鹏城实验室 | Underwater acoustic communication and detection signal processing method and apparatus, device, and storage medium |
| CN113311499B (en) * | 2021-05-13 | 2022-05-17 | 中国科学院声学研究所 | UUV detection wave generation method and device, UUV and waveform generator |
| CN113311499A (en) * | 2021-05-13 | 2021-08-27 | 中国科学院声学研究所 | UUV detection wave generation method and device, UUV and waveform generator |
| CN113452640A (en) * | 2021-06-02 | 2021-09-28 | 上海交通大学 | Multi-carrier-based detection and communication integrated system |
| CN115208484A (en) * | 2022-07-01 | 2022-10-18 | 哈尔滨工程大学 | Cross-ice medium acoustic communication method |
| CN115208484B (en) * | 2022-07-01 | 2023-03-24 | 哈尔滨工程大学 | Cross-ice medium acoustic communication method |
| CN115333645A (en) * | 2022-08-12 | 2022-11-11 | 厦门市声盛海洋工程有限公司 | Multi-path diversity method and system for communication sonar |
| CN115333645B (en) * | 2022-08-12 | 2024-10-15 | 厦门市声盛海洋工程有限公司 | Multi-path diversity method and system for communication sonar |
| WO2024131814A1 (en) * | 2022-12-23 | 2024-06-27 | 维沃移动通信有限公司 | Transmission method and apparatus, and device and readable storage medium |
| RU2807328C1 (en) * | 2023-02-13 | 2023-11-14 | Акционерное Общество "Концерн "Океанприбор" | Method for detecting synchronization signal of broadband hydroacoustic communication system |
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