CN109862324A - A kind of communication method and system based on BICM - Google Patents
A kind of communication method and system based on BICM Download PDFInfo
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Abstract
A kind of communication means and system based on BICM provided by the invention obtains video image information by camera by transmitting terminal, and the video image information is converted to the first signal；Transmitting terminal encodes first signal by BICM, and the first signal after coding is converted to second signal, sends the second signal to receiving end；Receiving end receives the second signal and is decoded, video image information after being restored, to provide underwater monitoring data support for aquafarm intelligence, the first signal is encoded by BICM technology, short-range no cableless communication is realized in the aquafarm of environment complexity, and traffic rate is high.
Description
Technical field
The present invention relates to sound communication technical field, in particular to a kind of communication means and system based on BICM.
Background technique
According to " (2017-2025) is planned in national aquafarm demostration area construction ", Fujian Province is total to 9 states of planning construction
Family's grade aquafarm demonstration area.To realize fishery sustainable and healthy development, the construction of Fujian Province's aquafarm and management science are pushed
Change, standardization, modernization aquafarm construction should be embodied in terms of intelligence.Intelligence is exactly to marine ecosystem environment
Intellisense is carried out, the managed operation of aquafarm is facilitated.Construct the intelligence of " artificial intelligence+Internet of Things+ecology pasture "
Production system, realizes pasture information system management, and the conduct monitoring at all levels to aquafarm is basis.So, how modern sea is utilized
Foreign engineering technology, to being assessed after the underwater movement state of fish, the underwater repairing effect of natural ecology, the casting of artificial marine habitat and
Situations such as aquafarm water quality condition, is monitored, be exactly at the moment aquafarm must solve the problems, such as.With regard to current modern times sea
For foreign technology, carrying out underwater monitoring using underwater robot auxiliary is exactly one of solution.Marine environment is badly dangerous, dives
The diving depth of water person and activity duration are limited, and underwater robot can be visible in highly dangerous environment, contaminated environment and zero
The waters of degree replaces artificial long working under water.In addition, Sonar system, video camera, photograph can be equipped on underwater robot
The devices such as bright lamp and mechanical arm, can provide real-time video, sonar image, and mechanical arm can pick up weight etc., therefore underwater robot
Have become the important tool of exploitation ocean.There are mainly two types of underwater robots: having cable remote control and cableless remote control.
So far, Intellisense of the various underwater robots for aquafarm has been developed both at home and abroad, they are in ruler
Very little, power and maneuverability are different.Due to the popularity of application, had already appeared one kind be intended to it is smaller, more simply and more
Cheap trend.Miniature underwater robot is more and more common in the application of many military and civilians, as environmental monitoring and harbour are pacified
Entirely.It is light-weight (< 10 kilograms) since they are small in size, therefore be easy to dispose, and more more cost effective than large-scale legacy system
And Saving in time costs.
The primary operational limitation of this miniature underwater robot is remote control cable, is conventionally used to power and communicate.It is this
Cable connection limits flexibility of the miniature underwater robot in high current or tide, and may be with labyrinth in aquafarm
Tied up in knots.Therefore, the limitation for having cable to be remotely controlled prevents it from being used extensively with aquafarm intelligent Application.Such as ocean is herded
The examples such as the artificial marine habitat shooting in show the requirement of cableless remote control operation.There is the limitation of cable to promote autonomous underwater boat
The use of row device, Autonomous Underwater Vehicle can be run independently of surface platform.But due to the number of existing submarine communication technology
Limited according to transmission rate, the feedback information usually obtained on the water surface is minimum, it limits operator and intervenes during deployment
Ability, and need accurate mission planning with assure success operation.Due to the electric conductivity of seawater, electromagnetic wave passes in the seawater
Broadcast decaying greatly, the more highly attenuating frequency the bigger.Therefore, following three sides are concentrated on for the untethered communication Major research field of seawater
Face: magnetic induction, optics and acoustics.
1. magnetic induction communicates
Magnetic induction (Magneto Inductive, MI) communication be different from radio communication because energy be limited in it is non-propagating
In magnetic field, rather than it is radiated in far field electromagnetic signal.This technology is also referred to as " near field " communication.Magnetic induction (MI) signal is
One A.C.magnetic dipole field, almost without electric field.Since the frequency used is extremely low, electric field is suppressed, therefore, multiturn coil
Antenna has low-down radiation resistance, and generates the smallest electromagnetic signal.Since the electric field that coil generates is insufficient, magnetic signal can
To be considered non-propagating.In conducting medium (such as salt water), this can be described as diffusion field.It dashes forward in many magnetic induction application
A main advantage out is the concealment or safety of communication link.The non-propagating characteristic in magnetic field limits the range of inquiry,
To reduce from the unnecessary detection other than operating fields.It is intrinsic special caused by another non-propagating characteristic as MI signal
Property be not have the multipath of delay to reach and subsequent decline.These advantages finally simplify the master-plan of receiver.
For receiver and transmitter, by increasing the size of coil or increasing circle number, the magnetic field of generation and receiver
Sensitivity will increase, to realize improved range.It should be noted that have a Best Point in most applications, with
The increase of the number of turns, not only result in copper loss and core loss, and due to the increase of copper winding weight, equally there is practical work
Cheng Yiyi.In addition, increasing electric current by coil can produce bigger magnetic field at transmitter.However, power loss and core
Loss can all have an impact again, to reduce the efficiency of whole system.
Between the size, weight and power demand of whole system, the compromise of electromagnetic induction system is obvious.When answering
For miniature underwater robot, the size and weight for antenna needed for ensuring enough opereating specifications will seriously limit Minitype underground machine
The movement of device people.Further, since not using cable, all systems will all be powered by portable power, deployment time and transmission
Needs are traded off between power.Therefore, electromagnetic induction system is typically considered to not be suitable in miniature underwater robot platform
On disposed.
2. optic communication
Nearly ten years, extensive research has been obtained in the optic communication of subsurface communication.It is passed using translucent seawater as light
Defeated medium, light can travel to receiver from transmitter in a manner of being similar to fixed optical fiber link.Due to building reliable transmitting-receiving
Device reduces the cost of required component, and very big growth occurs in the development of optic communication.In order to effectively generate arrow beam of light, need
Want the light emitting diode (LED) or laser diode of high quality.Equally, in order to ensure the signal-to-noise ratio of receiver is good, usually make
With avalanche diode or photomultiplier tube (PMT).
Since the turbidity of seawater changes, the practical ranges of optical communication link suffer from limitation.It is good in water quality
Deep-sea in, the scattering of light caused by impurity and diffusion are minimum, can run in the range of several hundred rice.However, bigger in presence
In the shallow sea water of suspended particulate content, it may occur that the extreme deformation of transmitted light beam causes working range to be substantially reduced.Directional light
Source and receiver also bring difficulty to the setting of optical communication system and operation.Dislocation can generate disastrous effect.Therefore, small
Movement easilys lead to data-bag lost.The special nature of optical communication system needs direct sight (LOS) just to can be carried out feasible
Operation, the shade of any light or masking can all interrupt communication immediately.Some preliminary researchs have been carried out, explores light and exists
The reflection of earth's surface, to be communicated on rock stratum or other submarine obstacles.However, up to the present, result of study is seldom,
And the practical practicability of this system has not proved out.
Although the transmission range of underwater optics communication system is limited (especially in muddy water), very short distance is being needed
Advantage is shown in the application of (< 50 meters) high data rate link.One typical example is uploaded from underwater robot
Sensor reading, do not need ground or mechanical splice.In this application, high-throughput link makes the shutdown of underwater robot
Time is minimum.Due to the characteristic of optical communication, to guarantee that data transmission needs shorter transmission range, and underwater robot must
It must be remain stationary in the position close to receiver.
3. sound communication
In decades, acoustic communication, which has been chosen to be, reliably to transmit information by underway.Sound wave is in water
The ability propagated over long distances shows it than light technology and induction technology even more ideal.A series of research has been proven that
Application power of the acoustic communication technology in several kilometers of data transmission.It is to be noted, however, that absorption loss is sound channel
The function of frequency.Therefore, the usable spectrum of remote acoustic communication is usually very low, and about 5 arrive 10kHz.
Compared with optical technology, due to the turbidity of water, degeneration caused by the sound transmission is minimum.This abnormal propagation is logical
Often as caused by suspended sediment or the particle of distribution.Therefore, being obtained in turbidity and clear water the result is that comparable, this
So that the technology is suitable for the multiple operating environments such as deep-sea or shallow water.In addition, the Omnidirectional radiation of acoustic signal significantly reduces
Complexity needed for configuration and tracking point-to-point link.Without using orientation sensor, allow the both ends of communication link in water column
Interior free positioning.In the application of aquafarm, this attribute is extremely important, because the movement of underwater robot can make to orient chain
The tracking and alignment on road are almost impossible.There are significant differences for acoustic impedance between water and air and water and rock, this makes
In the case where no severe signal power loss, it is difficult to transmit acoustical signal by channel boundary.Therefore, in order to ensure reliable
Subsurface communication, the generation and detection of acoustical signal should occur in the water surface hereinafter, rather than other than channel boundary.
Currently, acoustic communication has very big breakthrough in terms of effective information handling capacity and opereating specification under water.It is more
Kind auto-adaptive filtering technique is combined with diversity array acceptor, successfully eliminates the influence of time-variant multipath channel.In spite of
These improvement, but the seldom research underwater sound communication modulation that concentrates on developing a kind of reliable, low cost, high data rate
On demodulator, which is suitble to be deployed on miniature underwater robot platform.Currently, critical limiting factor inhibits micro-
In type underwater robot scene using traditional receiver architecture be large-scale multi-channel receiver structure physical size and it is high at
This.However, the development of iteration Turbo coding field promotes the research used single unit receiver again recently.As
A kind of transmission plan of spectral efficient, Bit Interleaved Coded Modulation (Bit-Interleaved Coded Modulation,
BICM) system is widely used in modern wireless communication systems.It is encoded compared to Turbo and needs two soft input and output
(SISO), BICM only needs a SISO.Therefore, the features such as BICM has implementation complexity lower, structure simple and flexible.
It is operated to be perceived convenient for aquafarm intelligence, the untethered communication link that energy high-speed carries out data transmission is required
's.Operator can obtain sensor information in real time in this way, such as video or seabed artificial marine habitat sonar image, it is therefore desirable to one
It kind can realize short-range no cableless communication in the aquafarm of environment complexity, and the high communication means of traffic rate and be
System.
Summary of the invention
The technical problems to be solved by the present invention are: a kind of communication means and system based on BICM is provided, it can be in ring
Short-range no cableless communication is realized in the aquafarm of border complexity, and traffic rate is high.
In order to solve the above-mentioned technical problem, a kind of technical solution that the present invention uses are as follows:
A kind of communication means based on BICM, comprising steps of
S1, transmitting terminal obtain video image information by camera, and the video image information is converted to the first letter
Number；
S2, transmitting terminal encode first signal by BICM, and the first signal after coding is converted to
Binary signal sends the second signal to receiving end；
S3, receiving end receive the second signal and are decoded, the video image information after being restored.
In order to solve the above-mentioned technical problem, the another technical solution that the present invention uses are as follows:
A kind of communication system based on BICM, including transmitting terminal and receiving end, the transmitting terminal include first memory,
One processor and storage on the first memory and the first computer program that can be run on first processor, the receiving end
Including second memory, second processor and it is stored in the can run on second memory and in second processor second calculating
Machine program, the first processor perform the steps of when executing first computer program
S1, transmitting terminal obtain video image information by camera, and the video image information is converted to the first letter
Number；
S2, transmitting terminal encode first signal by BICM, and the first signal after coding is converted to
Binary signal sends the second signal to receiving end；
S3, receiving end receive the second signal and are decoded, the video image information after being restored.
The beneficial effects of the present invention are: video image information is obtained by camera by transmitting terminal, and by the view
Frequency image information is converted to the first signal；Transmitting terminal encodes first signal by BICM, and by after coding
One signal is converted to second signal, sends the second signal to receiving end；Receiving end receives the second signal and is decoded,
Video image information after being restored passes through BICM skill to provide underwater monitoring data support for aquafarm intelligence
Art encodes the first signal, and short-range no cableless communication is realized in realization in the aquafarm of environment complexity, and communicates speed
Rate is high.
Detailed description of the invention
Fig. 1 is the communication means flow chart based on BICM of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the communication system based on BICM of the embodiment of the present invention；
Label declaration:
1, based on the communication system of BICM；2, transmitting terminal；3, receiving end；4, first memory；5, first processor；6,
Two memories；7, second processor.
Specific embodiment
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and cooperate attached
Figure is explained.
Please refer to Fig. 1, a kind of communication means based on BICM, comprising steps of
S1, transmitting terminal obtain video image information by camera, and the video image information is converted to the first letter
Number；
S2, transmitting terminal encode first signal by BICM, and the first signal after coding is converted to
Binary signal sends the second signal to receiving end；
S3, receiving end receive the second signal and are decoded, the video image information after being restored.
As can be seen from the above description, the beneficial effects of the present invention are: video image is obtained by camera by transmitting terminal
Information, and the video image information is converted into the first signal；Transmitting terminal encodes first signal by BICM,
And the first signal after coding is converted into second signal, the second signal is sent to receiving end；Receiving end receives described the
Binary signal is decoded, the video image information after being restored, to provide underwater monitoring data for aquafarm intelligence
Support, encodes the first signal by BICM technology, realizes in the aquafarm of environment complexity short-range untethered logical
Letter, and traffic rate is high.
Further, step S1 specifically:
Transmitting terminal obtains video image information by the camera of underwater robot, and by preset circuit by the view
Frequency image information is converted to electric signal.
Seen from the above description, video image information is obtained by the camera of underwater robot, and passes through preset electricity
The video image information is converted to electric signal by road, carries out coding improve data transfer effect to the electric signal convenient for subsequent
Rate.
Further, step S2 specifically:
Transmitting terminal encodes the electric signal by BICM and AMC, and the electric signal after coding is converted to sound letter
Number, the acoustical signal is sent to receiving end.
Seen from the above description, the electric signal is encoded by BICM and AMC, and the electric signal after coding is turned
It is changed to acoustical signal, the acoustical signal is sent to receiving end, not only ensure that the transmission quality of link also improves data transmission effect
Rate.
Further, step S2 further include:
The frequency that acoustical signal is arranged is 50KH.
Seen from the above description, it is 50KH by the frequency that acoustical signal is arranged, increases message transmission rate using bandwidth.
Further, step S3 specifically:
Receiving end receives the acoustical signal and is decoded by decoder, the video image information after being restored.
Seen from the above description, by receiving the acoustical signal and being decoded by decoder, the view after being restored
Frequency image information improves the stability of system.
Referring to figure 2., a kind of communication system based on BICM, including transmitting terminal and receiving end, the transmitting terminal include the
One memory, first processor and storage are on the first memory and the first computer journey that can run on first processor
Sequence, the receiving end include second memory, second processor and are stored on second memory and can be in second processor
The second computer program of operation, the first processor perform the steps of when executing first computer program
S1, transmitting terminal obtain video image information by camera, and the video image information is converted to the first letter
Number；
S2, transmitting terminal encode first signal by BICM, and the first signal after coding is converted to
Binary signal sends the second signal to receiving end；
S3, receiving end receive the second signal and are decoded, the video image information after being restored.
As can be seen from the above description, the beneficial effects of the present invention are: video image is obtained by camera by transmitting terminal
Information, and the video image information is converted into the first signal；Transmitting terminal encodes first signal by BICM,
And the first signal after coding is converted into second signal, the second signal is sent to receiving end；Receiving end receives described the
Binary signal is decoded, the video image information after being restored, to provide underwater monitoring data for aquafarm intelligence
Support, encodes the first signal by BICM technology, realizes in the aquafarm of environment complexity short-range untethered logical
Letter, and traffic rate is high.
Further, step S1 specifically:
Transmitting terminal obtains video image information by the camera of underwater robot, and by preset circuit by the view
Frequency image information is converted to electric signal.
Seen from the above description, video image information is obtained by the camera of underwater robot, and passes through preset electricity
The video image information is converted to electric signal by road, carries out coding improve data transfer effect to the electric signal convenient for subsequent
Rate.
Further, step S2 specifically:
Transmitting terminal encodes the electric signal by BICM and AMC, and the electric signal after coding is converted to sound letter
Number, the acoustical signal is sent to receiving end.
Seen from the above description, the electric signal is encoded by BICM and AMC, and the electric signal after coding is turned
It is changed to acoustical signal, the acoustical signal is sent to receiving end, not only ensure that the transmission quality of link also improves data transmission effect
Rate.
Further, step S2 further include:
The frequency that acoustical signal is arranged is 50KH.
Seen from the above description, it is 50KH by the frequency that acoustical signal is arranged, increases message transmission rate using bandwidth.
Further, step S3 specifically:
Receiving end receives the acoustical signal and is decoded by decoder, the video image information after being restored.
Seen from the above description, by receiving the acoustical signal and being decoded by decoder, the view after being restored
Frequency image information improves the stability of system.
Embodiment one
Please refer to Fig. 1, a kind of communication means based on BICM, comprising steps of
S1, transmitting terminal obtain video image information by camera, and the video image information is converted to the first letter
Number；
Step S1 specifically:
Transmitting terminal obtains video image information by the camera of underwater robot, and by preset circuit by the view
Frequency image information is converted to electric signal；
S2, transmitting terminal encode first signal by BICM, and the first signal after coding is converted to
Binary signal sends the second signal to receiving end；
Step S2 specifically:
Transmitting terminal encodes the electric signal by BICM and AMC, and the electric signal after coding is converted to sound letter
Number, the acoustical signal is sent to receiving end；
Step S2 further include:
The frequency that acoustical signal is arranged is 50KH；
S3, receiving end receive the second signal and are decoded, the video image information after being restored；
Step S3 specifically:
Receiving end receives the acoustical signal and is decoded by decoder, the video image information after being restored.
Embodiment two
Referring to figure 2., a kind of communication system 1 based on BICM, including transmitting terminal 2 and receiving end 3, the transmitting terminal 2 wrap
It includes first memory 4, first processor 5 and is stored in the first meter that can be run on first memory 4 and on first processor 5
Calculation machine program, the receiving end 3 include second memory 6, second processor 7 and are stored on second memory 6 and can be the
Realized when the second computer program run on two processors 7, the first processor 5 execute first computer program with
Lower step:
S1, video image information is obtained by camera, and the video image information is converted into the first signal；
Step S1 specifically:
Video image information is obtained by the camera of underwater robot, and passes through preset circuit for the video image
Information is converted to electric signal；
S2, first signal is encoded by BICM, and the first signal after coding is converted into second signal,
The second signal is sent to receiving end；
Step S2 specifically:
The electric signal is encoded by BICM and AMC, and the electric signal after coding is converted into acoustical signal, is sent
The acoustical signal is to receiving end；
Step S2 further include:
The frequency that acoustical signal is arranged is 50KH；
The second processor 7 performs the steps of when executing the second computer program
S3, the reception second signal are decoded, the video image information after being restored；
Step S3 specifically:
It receives the acoustical signal and is decoded by decoder, the video image information after being restored.
In conclusion a kind of communication means and system based on BICM provided by the invention, passes through camera shooting by transmitting terminal
Head obtains video image information, and the video image information is converted to the first signal；Transmitting terminal is by BICM to described the
One signal is encoded, and the first signal after coding is converted to second signal, sends the second signal to receiving end；It connects
Receiving end receives the second signal and is decoded, the video image information after being restored, to mention for aquafarm intelligence
It is supported for underwater monitoring data, the first signal is encoded by BICM technology, is realized in the aquafarm of environment complexity
Short-range no cableless communication, and traffic rate is high, obtains video image information by the camera of underwater robot, and by pre-
If circuit the video image information is converted into electric signal, convenient for it is subsequent to the electric signal carry out coding improve data pass
Defeated efficiency encodes the electric signal by BICM and AMC, and the electric signal after coding is converted to acoustical signal, sends
The acoustical signal not only ensure that the transmission quality of link also improves data transmission efficiency, believed by setting sound to receiving end
Number frequency be 50KH, increase message transmission rate using bandwidth.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, similarly include
In scope of patent protection of the invention.
Claims (10)
1. a kind of communication means based on BICM, which is characterized in that comprising steps of
S1, transmitting terminal obtain video image information by camera, and the video image information is converted to the first signal；
S2, transmitting terminal encode first signal by BICM, and the first signal after coding is converted to the second letter
Number, the second signal is sent to receiving end；
S3, receiving end receive the second signal and are decoded, the video image information after being restored.
2. the communication means according to claim 1 based on BICM, which is characterized in that step S1 specifically:
Transmitting terminal obtains video image information by the camera of underwater robot, and passes through preset circuit for the video figure
As information is converted to electric signal.
3. the communication means according to claim 2 based on BICM, which is characterized in that step S2 specifically:
Transmitting terminal encodes the electric signal by BICM and AMC, and the electric signal after coding is converted to acoustical signal, hair
Send the acoustical signal to receiving end.
4. the communication means according to claim 3 based on BICM, which is characterized in that step S2 further include:
The frequency that acoustical signal is arranged is 50KH.
5. the communication means according to claim 3 based on BICM, which is characterized in that step S3 specifically:
Receiving end receives the acoustical signal and is decoded by decoder, the video image information after being restored.
6. a kind of communication system based on BICM, including transmitting terminal and receiving end, the transmitting terminal includes first memory, first
Processor and storage are on the first memory and the first computer program that can run on first processor, the receiving end are wrapped
It includes second memory, second processor and is stored in the second computer that can be run on second memory and in second processor
Program, which is characterized in that the first processor performs the steps of when executing first computer program
S1, video image information is obtained by camera, and the video image information is converted into the first signal；
S2, first signal is encoded by BICM, and the first signal after coding is converted into second signal, sent
The second signal is to receiving end；
The second processor performs the steps of when executing the second computer program
S3, the reception second signal are decoded, the video image information after being restored.
7. the communication system according to claim 6 based on BICM, which is characterized in that step S1 specifically:
Video image information is obtained by the camera of underwater robot, and passes through preset circuit for the video image information
Be converted to electric signal.
8. the communication system according to claim 7 based on BICM, which is characterized in that step S2 specifically:
The electric signal is encoded by BICM and AMC, and the electric signal after coding is converted into acoustical signal, described in transmission
Acoustical signal is to receiving end.
9. the communication system according to claim 8 based on BICM, which is characterized in that step S2 further include:
The frequency that acoustical signal is arranged is 50KH.
10. the communication system according to claim 8 based on BICM, which is characterized in that step S3 specifically:
It receives the acoustical signal and is decoded by decoder, the video image information after being restored.
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| CN201910144219.1A CN109862324A (en) | 2019-02-27 | 2019-02-27 | A kind of communication method and system based on BICM |
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| CN203243334U (en) * | 2012-12-18 | 2013-10-16 | 南京工程学院 | Underwater ultrasonic communication device |
| CN104541452A (en) * | 2012-08-31 | 2015-04-22 | 泰科电子海底通信有限责任公司 | Bit-interleaved coded modulation with iterative decoding and fractional inner coding |
| US20160315717A1 (en) * | 2012-04-12 | 2016-10-27 | Ceebus Technologies, Llc | Underwater acoustic array, communication and location system |
| CN106656466A (en) * | 2016-12-20 | 2017-05-10 | 中国科学院理化技术研究所 | Associated encryption transmission device and method for underwater optical image |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160315717A1 (en) * | 2012-04-12 | 2016-10-27 | Ceebus Technologies, Llc | Underwater acoustic array, communication and location system |
| CN104541452A (en) * | 2012-08-31 | 2015-04-22 | 泰科电子海底通信有限责任公司 | Bit-interleaved coded modulation with iterative decoding and fractional inner coding |
| CN203243334U (en) * | 2012-12-18 | 2013-10-16 | 南京工程学院 | Underwater ultrasonic communication device |
| CN106656466A (en) * | 2016-12-20 | 2017-05-10 | 中国科学院理化技术研究所 | Associated encryption transmission device and method for underwater optical image |
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Application publication date: 20190607 |