CN107171768A - Underwater acoustic communication method and device - Google Patents
Underwater acoustic communication method and device Download PDFInfo
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- CN107171768A CN107171768A CN201710324124.9A CN201710324124A CN107171768A CN 107171768 A CN107171768 A CN 107171768A CN 201710324124 A CN201710324124 A CN 201710324124A CN 107171768 A CN107171768 A CN 107171768A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
- H04L1/0063—Single parity check
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention proposes a kind of underwater acoustic communication method, and this method includes：Transmitting terminal is encoded according to BCH (31,16) supervises code element to constitute coded data by the redundancy that initial data increases for realizing error correcting and detecting；The coded data is transmitted by underwater acoustic channel；Receiving terminal receives the coded data, and decodes to obtain decoding data according to BCH (31,16)；Whether correct monitor the decoding data；When the error number of generation is not more than BCH (31,16) maximum error correcting and detecting number, receiving terminal is corrected by automatic error-correcting；When the error number of generation is more than BCH (31,16) maximum error correcting and detecting number, receiving terminal sends the message of reception failure to transmitting terminal, and transmitting terminal resends coded data after receiving the message.The invention also provides a kind of underwater sound communication device, the device has stronger forward error correction capability, and coding and decoding realizes simple, reliability height.
Description
Technical field
The present invention relates to field of underwater acoustic communication, more particularly to a kind of underwater sound communication coding method and device.
Background technology
Marine environmental monitoring, the real-time monitoring of seabed pollutant, the defence detecting of national defence ocean, seabed inspection, seabed are large-scale
The applications such as target invasion Realtime Alerts are required for utilizing seabed water sound communication technique, carry out real-time Data Transmission, at present under water
Often the underwater sound is used as data communication medium.But due to the characteristic of underwater acoustic channel, the effective bandwidth of underwater sound communication is low, propagation delay time
Long, signal fluctuation decline is serious, and the bit error rate is high, and loss is big so that the anti-many ways of underwater sound communication, anti-fading difficulty are very big, cause
Communication efficiency is low, and link down frequently, sets up reliable underwater sound data communication very difficult.
Due to the complexity of underwater sound communication, the coding techniques of current underwater sound communication is excessively complicated, is directed to improving number mostly
According to transmission speed and bandwidth, the complicated error rate of coding is high, practicality poor reliability.In the application of actual underwater sound communication, many fields
Scape simultaneously need not transmit high amount of traffic, such as the application such as marine monitoring, the data volume that various kinds of sensors is produced is simultaneously little, not with biography
For the purpose of broadcasting voice, image and complex characters, also less complex characters, but require that transmission is simple and reliable, error correcting capability is strong.
Due to the underwater sound transmit time delay effect, to set up reliable and stable link connection, if require frequently shake hands and
Feeding back ACK signal, then can cause the degradation of communication efficiency.Due to the unstability of underwater sound link, receiving terminal examines error
After ask that transmitting terminal repeat repeating transmission, add overhead.
Compared to very various electromagnetic communications of ripeness standard in air, such as GSM, CDMA, 3G, LTE,
A set of unified product and industry communication standard, the ripe underwater sound are not formed in WIFI, ZIGBEE etc., current global range
Communication products are also very few.Especially for the underwater sound communication product of below 10KHz working frequency range, due to its propagation distance
It is long, available for reasons such as military purposes, therefore develop reliable and stable underwater acoustic communication method and work out the high performance underwater sound
Communication code technology, will be detected for China's marine environmental monitoring, resource exploration, scientific experiment, Fire prevention, offshore defence,
Submarine target intrusion alarm, extra large lower submerged reef indicates that ship tracking is reported, the field such as seabed three-dimensional position navigation has wide answer
Use prospect.
How to provide a kind of reliable and stable underwater sound communication device is a current problem urgently to be resolved hurrily.
The content of the invention
For defect of the prior art, the present invention proposes a kind of method and device of underwater sound communication, in underwater sound communication
Middle utilization BCH (31,16) forward error correction coding technology, uses BCH (31,16) forward error correction coding technology, it is not necessary to receiving terminal
Frequent feedback ack signal, using redundancy check bit error correction in the code received, with very strong error correcting capability, can actively entangle
Mistake is no more than any error code of 3.
Specifically, the invention provides a kind of underwater acoustic communication method, this method includes：
Transmitting terminal encodes according to BCH (31,16) redundancy that initial data increases for realizing error correcting and detecting supervising code element
To constitute coded data；
The coded data is transmitted by underwater acoustic channel；
Receiving terminal receives the coded data, and decodes to obtain decoding data according to BCH (31,16)；
Whether correct monitor the decoding data；
It is described to connect when the error number that the decoding data occurs is not more than BCH (31,16) maximum error correcting and detecting number
Receiving end is corrected by automatic error-correcting；When the maximum error correction that the error number that the decoding data occurs is more than BCH (31,16) is examined
During wrong number, the receiving terminal sends the message of reception failure to the transmitting terminal, and the transmitting terminal receives weight after the message
Newly send the coded data.
As the further improvement of above-mentioned technical proposal, BCH (31, the 16) coding and the BCH (31,16) decodings are equal
Realized by FPGA circuitry.
As the further improvement of above-mentioned technical proposal, the preamble of the BCH (31,16) is 101010 alternate codes.
As the further improvement of above-mentioned technical proposal, first code word of the BCH (31,16) is SC synchronous codes, institute
The word length for stating SC synchronous codes is 32bit.
As the further improvement of above-mentioned technical proposal, the address code word of the BCH (31,16) is followed by multiple information
Code word；The word length of the address code word is 32bit；The word length of described information code word is 32bit；First of address code word is 0,
First of information code word is 1, if without address code word or information code word, being filled with idle code word.
As the further improvement of above-mentioned technical proposal, the 17 to 31st of the address code word is BCH check bit, is used for
To preceding 16 progress Error Correction of Coding of the address code word；The 32nd of the address code word is even school position, for controlling to make institute
The number for stating in address code word all 1 is even number.
As the further improvement of above-mentioned technical proposal, the 17 to 31st of described information code word is BCH check bit, is used for
To preceding 16 progress Error Correction of Coding of described information code word；The 32nd of described information code word is even school position, for controlling to make institute
The number for stating in information code word all 1 is even number.
Specifically, present invention also offers a kind of underwater sound communication device, the device includes：
Coding module, supervises the redundancy that initial data increases for realizing error correcting and detecting for being encoded according to BCH (31,16)
Code element is superintended and directed to constitute coded data；
Transport module, for transmitting the coded data by underwater acoustic channel；
Decoder module, decodes to obtain decoding data for receiving the coded data, and according to BCH (31,16)；
Monitoring modular, it is whether correct for monitoring the decoding data；
Correction module, the maximum error correcting and detecting for being not more than BCH (31,16) when the error number that the decoding data occurs
During number, corrected by automatic error-correcting；
Retransmission module, the maximum error correcting and detecting for being more than BCH (31,16) when the error number that the decoding data occurs
During number, the message of reception failure is sent to transmitting terminal, the transmitting terminal, which is received, resends the coded data after the message.
As the further improvement of above-mentioned technical proposal, BCH (31, the 16) coding and the BCH (31,16) decodings are equal
Realized by FPGA circuitry.
As the further improvement of above-mentioned technical proposal, the preamble of the BCH (31,16) is 101010 alternate codes.
The technical scheme that the present invention is provided, compared with existing known technology, at least has the advantages that：
(1) coding is with very strong forward error correction capability.
(2) simple and reliable, the longer field of underwater acoustic communication of the time delay that is particularly suitable for use in is encoded.
(3) quantity of data re-transmitting is reduced, the communication efficiency of underwater acoustic network is improved, improves reliability.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore is not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is a kind of underwater acoustic communication method schematic flow sheet that one embodiment of the invention is proposed；
Fig. 2 is BCH proposed by the present invention (31,16) encoded data stream format chart；
Fig. 3 is a kind of structural representation for underwater sound communication device that one embodiment of the invention is proposed.
Main element symbol description：
101- coding modules；102- transport modules；103- decoder modules；104- monitoring modulars；105- correction modules；106-
Retransmission module.
Embodiment
Hereinafter, the various embodiments of the disclosure will be described more fully.The disclosure can have various embodiments, and
It can adjust and change wherein.It should be understood, however, that：It is limited to spy disclosed herein in the absence of by the various embodiments of the disclosure
Determine the intention of embodiment, but the disclosure should be interpreted as covering in the spirit and scope for the various embodiments for falling into the disclosure
All adjustment, equivalent and/or alternative.
Hereinafter, the term " comprising " that can be used in the various embodiments of the disclosure or " may include " indicate disclosed
Function, operation or the presence of element, and do not limit the increase of one or more functions, operation or element.In addition, such as existing
Used in the various embodiments of the disclosure, term " comprising ", " having " and its cognate are meant only to represent special characteristic, number
Word, step, operation, element, the combination of component or foregoing item, and be understood not to exclude first one or more other
Feature, numeral, step, operation, element, the presence of the combination of component or foregoing item or increase one or more features, numeral,
Step, operation, element, the possibility of the combination of component or foregoing item.
In the various embodiments of the disclosure, statement " in A or/and B at least one " includes the word listed file names with
Any combinations or all combinations." A or B " or " in A or/and B at least one " may include A, may include B or can for example, statement
Including A and B both.
The statement (" first ", " second " etc.) used in the various embodiments of the disclosure can be modified to be implemented various
Various element in example, but corresponding element can not be limited.For example, presented above be not intended to limit the suitable of the element
Sequence and/or importance.The purpose presented above for being only used for differentiating an element and other elements.For example, the first user fills
Put and indicate different user device with second user device, although the two is all user's set.For example, not departing from each of the disclosure
In the case of the scope for planting embodiment, the first element is referred to alternatively as the second element, similarly, and the second element is also referred to as first
Element.
It should be noted that：, can be by the first composition member if an element ' attach ' to another element by description
Part is directly connected to the second element, and " connection " the 3rd can be constituted between the first element and the second element
Element.On the contrary, when an element " being directly connected to " is arrived into another element, it will be appreciated that be in the first element
And second the 3rd element is not present between element.
The term " user " used in the various embodiments of the disclosure, which may indicate that, to be used the people of electronic installation or uses electricity
The device (for example, artificial intelligence electronic installation) of sub-device.
The term used in the various embodiments of the disclosure is only used for describing the purpose of specific embodiment and not anticipated
In the various embodiments of the limitation disclosure.As used herein, singulative is intended to also include plural form, unless context is clear
Chu it is indicated otherwise.Unless otherwise defined, all terms (including the technical term and scientific terminology) tool being otherwise used herein
There is the implication identical implication that the various embodiment one skilled in the art with the disclosure are generally understood that.The term
(term such as limited in the dictionary typically used) is to be interpreted as having and the situational meaning in correlative technology field
Identical implication and it will be not construed as with Utopian implication or excessively formal implication, unless in the various of the disclosure
It is clearly defined in embodiment.
Embodiment 1
A kind of underwater acoustic communication method that the embodiment of the present invention 1 is proposed, as shown in figure 1, comprising the following steps：
S11, transmitting terminal encode according to BCH (31,16) and supervise the redundancy that initial data increases for realizing error correcting and detecting
Code element is to constitute coded data；
BCH code is derived from Bose, Ray-Chaudhuri and Hocquenghem abbreviation, is coding theory especially error correcting code
Middle use must compare a kind of many coding methods.
BCH code is the important error correcting code of a class, and it, which is divided into information source information sequence pending by one group fixed of k positions, disappears
Breath group, then each message groups individual transform is grown into n (n>K) binary digit group, referred to as code word.If the number of message groups
Mesh is M, and all code lengths that is just referred to as of the M code word thus obtained are the block code that n, information number are M, are designated as n, M.Disappearing
The process that breath group is transformed into code word is referred to as coding, and its inverse process is referred to as decoding.BCH (31,16) is exactly that information number is 16
Block code.
BCH (31,16) codings are realized by FPGA circuitry.For example：It can be made up of XILINK low-power consumption FPGAs chip
Digital Logical Circuits realize related algorithm.
FPGA circuitry mainly includes：Low-power consumption FPGA, signal integration circuit, data ciphering and deciphering unit, internal memory, clock list
Member, PMU.
As shown in Fig. 2 for BCH (31,16) encoded data stream format chart, BCH (31,16) preamble is entered using bit synchronization
Row is synchronous, for notifying receiving terminal carries out reception to prepare.Preamble preferably 101010 alternate codes.
BCH (31,16) first code word is SC synchronous codes, the beginning for identifying a collection of code character sequence, SC synchronous codes
Word length 32bit.
BCH (31,16) address code word is followed by multiple information code words；The word length of the address code word is 32bit；Institute
The word length for stating information code word is 32bit；First of address code word is 0, and first of information code word is 1, if without address code
Word or information code word, then filled with idle code word.
The 17 to 31st of the address code word is BCH check bit, for being entangled to first 16 of the address code word
Miscoding；The 32nd of the address code word is even school position, for controlling to make in the address code word all 1 number for occasionally
Number.
The 17 to 31st of described information code word is BCH check bit, for being entangled to first 16 of described information code word
Miscoding；The 32nd of described information code word is even school position, for controlling to make in described information code word all 1 number for occasionally
Number.
S12, the coded data transmitted by underwater acoustic channel.
S13, receiving terminal receive the coded data, and decode to obtain decoding data according to BCH (31,16).
Whether S14, the monitoring decoding data are correct.
S15, when the decoding data occur error number be not more than BCH (31,16) maximum error correcting and detecting number when, institute
Receiving terminal is stated to be corrected by automatic error-correcting；When the maximum that the error number that the decoding data occurs is more than BCH (31,16) is entangled
During false retrieval mistake number, the receiving terminal sends the message of reception failure to the transmitting terminal, and the transmitting terminal receives the message
After resend the coded data.
Maximum error correcting and detecting number for BCH (31,16) is 3.
Embodiment 2
A kind of device for underwater sound communication that the embodiment of the present invention 2 is proposed, as shown in figure 3, including：
Coding module 101, for increasing initial data for realizing the superfluous of error correcting and detecting according to BCH (31,16) codings
It is remaining to supervise code element to constitute coded data.
BCH (31,16) codings are realized by FPGA circuitry.For example：It can be made up of XILINK low-power consumption FPGAs chip
Digital Logical Circuits realize related algorithm.
FPGA circuitry mainly includes：Low-power consumption FPGA, signal integration circuit, data ciphering and deciphering unit, internal memory, clock list
Member, PMU.
The 17 to 31st of described information code word is BCH check bit, for being entangled to first 16 of described information code word
Miscoding；The 32nd of described information code word is even school position, for controlling to make in described information code word all 1 number for occasionally
Number.
Transport module 102, for transmitting the coded data by underwater acoustic channel.
Decoder module 103, decodes to obtain decoding data for receiving the coded data, and according to BCH (31,16).
Monitoring modular 104, it is whether correct for monitoring the decoding data.
Correction module 105, the maximum error correction for being not more than BCH (31,16) when the error number that the decoding data occurs
During error detection number, corrected by automatic error-correcting.
Retransmission module 106, the maximum error correction for being more than BCH (31,16) when the error number that the decoding data occurs is examined
During wrong number, the message of reception failure is sent to transmitting terminal, the transmitting terminal, which is received, resends the coding after the message
Data.
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram for being preferable to carry out scene, module in accompanying drawing or
Flow is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also carry out one or more dresses that respective change is disposed other than this implement scene
In putting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
The invention described above sequence number is for illustration only, and the quality of implement scene is not represented.Disclosed above is only the present invention
Several specific implementation scenes, still, the present invention is not limited to this, and the changes that any person skilled in the art can think of is all
Protection scope of the present invention should be fallen into.
Claims (10)
1. a kind of underwater acoustic communication method, it is characterised in that this method includes：
Transmitting terminal encodes according to BCH (31,16) redundancy that initial data increases for realizing error correcting and detecting supervising code element with structure
Into coded data；
The coded data is transmitted by underwater acoustic channel；
Receiving terminal receives the coded data, and decodes to obtain decoding data according to BCH (31,16)；
Whether correct monitor the decoding data；
When the error number that the decoding data occurs is not more than BCH (31,16) maximum error correcting and detecting number, the receiving terminal
Corrected by automatic error-correcting；When the error number that the decoding data occurs is more than BCH (31,16) maximum error correcting and detecting
During number, the receiving terminal sends the message of reception failure to the transmitting terminal, and the transmitting terminal is sent out again after receiving the message
Send the coded data.
2. underwater acoustic communication method according to claim 1, it is characterised in that BCH (31, the 16) coding and the BCH
(31,16) decoding is realized by FPGA circuitry.
3. underwater acoustic communication method according to claim 1, it is characterised in that the preamble of the BCH (31,16) is
101010 alternate codes.
4. underwater acoustic communication method according to claim 1, it is characterised in that first code word of the BCH (31,16) be
SC synchronous codes, the word length of the SC synchronous codes is 32bit.
5. underwater acoustic communication method according to claim 1, it is characterised in that behind the address code word of the BCH (31,16)
Follow multiple information code words；The word length of the address code word is 32bit；The word length of described information code word is 32bit；Address code word
First be 0, first of information code word is 1, if without address code word or information code word, being filled with idle code word.
6. underwater acoustic communication method according to claim 5, it is characterised in that the 17 to 31st of the address code word be
BCH check bit, for preceding 16 progress Error Correction of Coding to the address code word；The 32nd of the address code word is even school
Position, is even number for controlling to make in the address code word all 1 number.
7. underwater acoustic communication method according to claim 5, it is characterised in that the 17 to 31st of described information code word be
BCH check bit, for preceding 16 progress Error Correction of Coding to described information code word；The 32nd of described information code word is even school
Position, is even number for controlling to make in described information code word all 1 number.
8. a kind of underwater sound communication device, it is characterised in that the device includes：
Coding module, for initial data to be increased into the redundancy picket code for realizing error correcting and detecting according to BCH (31,16) codings
Member is to constitute coded data；
Transport module, for transmitting the coded data by underwater acoustic channel；
Decoder module, decodes to obtain decoding data for receiving the coded data, and according to BCH (31,16)；
Monitoring modular, it is whether correct for monitoring the decoding data；
Correction module, the maximum error correcting and detecting number for being not more than BCH (31,16) when the error number that the decoding data occurs
When, corrected by automatic error-correcting；
Retransmission module, the maximum error correcting and detecting number for being more than BCH (31,16) when the error number that the decoding data occurs
When, the message of reception failure is sent to transmitting terminal, and the transmitting terminal, which is received, resends the coded data after the message.
9. underwater sound communication device according to claim 8, it is characterised in that BCH (31, the 16) coding and the BCH
(31,16) decoding is realized by FPGA circuitry.
10. underwater sound communication device according to claim 8, it is characterised in that the preamble of the BCH (31,16) is
101010 alternate codes.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107566808A (en) * | 2017-09-30 | 2018-01-09 | 深圳市智慧海洋科技有限公司 | A kind of underwater image transmission method and system based on wireless water sound communication technique |
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| CN108809523B (en) * | 2018-08-10 | 2022-05-06 | 深圳市智慧海洋科技有限公司 | Reliable data transmission method and system for underwater acoustic network |
| CN113869475A (en) * | 2021-09-24 | 2021-12-31 | 大连理工大学 | Design method and system suitable for underwater communication two-dimensional code |
| CN117278176A (en) * | 2023-11-23 | 2023-12-22 | 中科亿海微电子科技（苏州）有限公司 | FPGA configuration file generation device and method with error correction function |
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