CN106877981A - A kind of supper-fast shortwave is burst coding modulation technique - Google Patents
A kind of supper-fast shortwave is burst coding modulation technique Download PDFInfo
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- CN106877981A CN106877981A CN201710151812.XA CN201710151812A CN106877981A CN 106877981 A CN106877981 A CN 106877981A CN 201710151812 A CN201710151812 A CN 201710151812A CN 106877981 A CN106877981 A CN 106877981A
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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
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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
- H04L1/0041—Arrangements at the transmitter end
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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
- H04L1/0045—Arrangements at the receiver end
-
- 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
- H04L1/0057—Block codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Burst coding modulation technique the invention discloses a kind of supper-fast shortwave, scrambler treatment is first carried out respectively to every 192bit messages；Message to being processed through scrambler carries out the LDPC check codes that code check is 1/2, by after LDPC code coded treatment, a LDPC code word being generated per 192bit messages；By generating 103 symbols after the quadrature amplitude modulation of 16QAM, character rate is 38.4KSPS to one LDPC code word, and the symbol after modulation then is carried out into serioparallel exchange；Carry out the OFDM multi-carrier modulations that sub-carrier number is 128 again through the symbol after serioparallel exchange, it is the frame of 2.67ms to form a length, and frame includes that 103 symbols and 25 pilot tone are carried.Burst coding modulation technique the invention reside in a kind of supper-fast shortwave is provided, on the premise of transmission rate is ensured, " bursting " time of communication every time, the probability that reduction information is detected are shortened as far as possible.The method can be used for the communication between submarine and bank base, and guarantee information is not listened or captures.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of supper-fast shortwave is burst coding modulation technique.
Background technology
At present, submarine concealment means of communication only has two kinds, satellite communication and HF burst channel.HF burst channel technology
Exist always to the important means of bank base covert communications as submarine, its use can reduce submarine and be trapped because of communication, surveys
To the probability with interference.
Domestic shortwave burst information transmission rate most fast at present is less than 8Kbps, that is to say, that the message of a bag 192bit
The sudden transmission time of 25ms is needed, the basic reason for restricting transmission rate is the selection of channel coding method, how by mistake
In the case that code check is relatively low, ensureing code efficiency higher, that is, find Shannon coding turns into the main of HF burst channel
Developing direction.
The content of the invention
Burst coding modulation technique it is an object of the invention to provide a kind of supper-fast shortwave, ensureing the premise of transmission rate
Under, " bursting " time of communication every time, the probability that reduction information is detected are shortened as far as possible.
For achieving the above object, the technical scheme is that：A kind of supper-fast shortwave is burst coding modulation technique,
Transmission process and data receiver demodulating process are modulated including data,
Data modulation transmission process includes：
Step 1）Scrambler treatment is carried out respectively to every 192bit messages；
Step 2）Message to being processed through scrambler carries out the LDPC check codes that code check is 1/2, by LDPC code coded treatment
Afterwards, a LDPC code word is generated per 192bit messages；
Step 3）By generating 103 qam symbols after the quadrature amplitude modulation of 16QAM, qam symbol speed is one LDPC code word
38.4KSPS, then carries out serioparallel exchange by the qam symbol after modulation；
Step 4）Carry out the OFDM multi-carrier modulations that sub-carrier number is 128 again through the qam symbol after serioparallel exchange, formation one is long
The frame for 2.67ms is spent, frame includes that 103 OFDM symbols and 25 pilot tone are carried；
Step 5）Frame head is constituted with the PN sequences that length is 3.33ms, and it is 6ms's that frame head and frame are combined into a length
Data frame；
Step 6）The data sequence being made up of data frame is launched by antenna；
Data receiver demodulating process includes：
Step a）The data sequence that will be received is to enter line slip with the local sequence of transmitting terminal identical related；
Step b）OFDM demodulation is carried out to the data frame in data sequence, generation length is the frame of 2.67ms；
Step c）16QAM quadrature amplitude demodulations are carried out to frame, 103 qam symbols and 25 pilot tones are generated；
Step d）103 symbols of same frame are decoded by LDPC, generate a LDPC code word；
Step e）Each LDPC code word is again through going scrambler that the message information of 192bit is formed after processing.
One kind as this programme is preferred, and the PN sequences can be replaced by M sequence.
The beneficial effects of the invention are as follows：The present invention is with the lower LDPC coding techniques of the bit error rate and OFDM multi-carrier modulation skills
Art, can improve transmission rate while data accuracy is ensured, the burst time of message for 192bit can subtract
6ms is arrived less, can complete the communication of submarine and bank base, and guarantee information is not listened or captures.
Brief description of the drawings
Fig. 1 is the structural representation of data frame of the present invention.
Specific embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below in conjunction with accompanying drawing.
The coding modulation technique as shown in figure 1, a kind of supper-fast shortwave is burst, including data modulation transmission process and data connect
Receive demodulating process,
Data modulation transmission process includes：
Step 1）In order to reach the randomness of infomational message, scrambler treatment is first carried out respectively to every 192bit messages；
Step 2）Message to being processed through scrambler carries out the LDPC check codes that code check is 1/2, by LDPC code coded treatment
Afterwards, a LDPC code word is generated per 192bit messages；
Step 3）By generating 103 qam symbols after the quadrature amplitude modulation of 16QAM, qam symbol speed is one LDPC code word
38.4KSPS, then carries out serioparallel exchange by the qam symbol after modulation；
Step 4）OFDM multi-carrier modulations are carried out again through the symbol after serioparallel exchange, it is contemplated that subcarrier spacing can not too small, frequency
Band utilization rate can not be too low, and takes 2 integral number power, is convenient for IFFT/FFT computings, therefore OFDM selection sub-carrier numbers are
It is the frame of 2.67ms that 128,103 symbols form a length through OFDM multi-carrier modulations, and frame includes 103 OFDM symbols
Carried with 25 pilot tone, the baud rate of each subcarriers is 1/T=375 bauds；
Step 5）Frame head is constituted with the PN sequences or M sequence that length is 3.33ms, and frame head and frame are combined into a length
It is the data frame of 6ms；
Step 6）The data sequence being made up of data frame is launched by antenna；
Data receiver demodulating process includes：
Step a）Receiving data sequence, to ensure frame head synchronization, the data sequence that will be received is local with transmitting terminal identical
It is related that sequence enters line slip；
Step b）OFDM demodulation is carried out to the data frame in data sequence, generation length is the frame of 2.67ms；
Step c）16QAM quadrature amplitude demodulations are carried out to frame, 103 qam symbols and 25 pilot tones are generated；
Step d）103 symbols of same frame are decoded by LDPC, generate a LDPC code word；
Step e）Each LDPC code word is again through going scrambler that the message information of 192bit is formed after processing.
Described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of the present invention.
Claims (2)
1. a kind of supper-fast shortwave is burst coding modulation technique, it is characterised in that modulate transmission process including data and data connect
Receive demodulating process,
Data modulation transmission process includes：
Step 1）Scrambler treatment is carried out respectively to every 192bit messages；
Step 2）Message to being processed through scrambler carries out the LDPC check codes that code check is 1/2, by LDPC code coded treatment
Afterwards, a LDPC code word is generated per 192bit messages；
Step 3）By generating 103 qam symbols after the quadrature amplitude modulation of 16QAM, qam symbol speed is one LDPC code word
38.4KSPS, then carries out serioparallel exchange by the qam symbol after modulation；
Step 4）Carry out the OFDM multi-carrier modulations that sub-carrier number is 128 again through the qam symbol after serioparallel exchange, formation one is long
The frame for 2.67ms is spent, frame includes that 103 OFDM symbols and 25 pilot tone are carried；
Step 5）Frame head is constituted with the PN sequences that length is 3.33ms, and it is 6ms's that frame head and frame are combined into a length
Data frame；
Step 6）The data sequence being made up of data frame is launched by antenna；
Data receiver demodulating process includes：
Step a）Receiving data sequence, the data sequence that will be received enters line slip phase with the local sequence of transmitting terminal identical
Close；
Step b）OFDM demodulation is carried out to the data frame in data sequence, generation length is the frame of 2.67ms；
Step c）16QAM quadrature amplitude demodulations are carried out to frame, 103 qam symbols and 25 pilot tones are generated；
Step d）103 symbols of same frame are decoded by LDPC, generate a LDPC code word；
Step e）Each LDPC code word is again through going scrambler that the message information of 192bit is formed after processing.
2. a kind of supper-fast shortwave according to claim 1 is burst coding modulation technique, it is characterised in that the PN sequences
Can be replaced by M sequence.
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| CN201710151812.XA CN106877981A (en) | 2017-03-15 | 2017-03-15 | A kind of supper-fast shortwave is burst coding modulation technique |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371711A (en) * | 2020-03-16 | 2020-07-03 | 天津津航计算技术研究所 | Fast acquisition and synchronization method of wireless burst communication system |
| CN112003626A (en) * | 2020-08-31 | 2020-11-27 | 武汉梦芯科技有限公司 | LDPC decoding method, system and medium based on known bits of navigation message |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101018104A (en) * | 2006-11-01 | 2007-08-15 | 北京创毅视讯科技有限公司 | Mobile digital multimedia broadcast signal transmission system and channel bandwidth change method |
| CN101018105A (en) * | 2006-10-22 | 2007-08-15 | 北京创毅视讯科技有限公司 | A classified modulating mobile digital multimedia broadcast signal transmission system and method |
| CN101304524A (en) * | 2008-06-11 | 2008-11-12 | 清华大学 | Method and device for transmitting and receiving mobile multimedia broadcast |
| CN101699808A (en) * | 2009-11-12 | 2010-04-28 | 上海交通大学 | Differential encoding space-time-frequency modulation method |
| CN101908947A (en) * | 2010-05-20 | 2010-12-08 | 哈尔滨工业大学 | Concatenated coding and decoding method based on LDPC codes and constellation rotation quasi-orthogonal space-time codes and signal emitting and receiving method thereof |
| CN103124251A (en) * | 2013-01-09 | 2013-05-29 | 北京邮电大学 | Method and device of lowering PAPR (peak to average power ratio) of 60 GHz communication system based on LDPC (low density parity check) coding mechanism |
-
2017
- 2017-03-15 CN CN201710151812.XA patent/CN106877981A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101018105A (en) * | 2006-10-22 | 2007-08-15 | 北京创毅视讯科技有限公司 | A classified modulating mobile digital multimedia broadcast signal transmission system and method |
| CN101018104A (en) * | 2006-11-01 | 2007-08-15 | 北京创毅视讯科技有限公司 | Mobile digital multimedia broadcast signal transmission system and channel bandwidth change method |
| CN101304524A (en) * | 2008-06-11 | 2008-11-12 | 清华大学 | Method and device for transmitting and receiving mobile multimedia broadcast |
| CN101699808A (en) * | 2009-11-12 | 2010-04-28 | 上海交通大学 | Differential encoding space-time-frequency modulation method |
| CN101908947A (en) * | 2010-05-20 | 2010-12-08 | 哈尔滨工业大学 | Concatenated coding and decoding method based on LDPC codes and constellation rotation quasi-orthogonal space-time codes and signal emitting and receiving method thereof |
| CN103124251A (en) * | 2013-01-09 | 2013-05-29 | 北京邮电大学 | Method and device of lowering PAPR (peak to average power ratio) of 60 GHz communication system based on LDPC (low density parity check) coding mechanism |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371711A (en) * | 2020-03-16 | 2020-07-03 | 天津津航计算技术研究所 | Fast acquisition and synchronization method of wireless burst communication system |
| CN111371711B (en) * | 2020-03-16 | 2022-10-14 | 天津津航计算技术研究所 | Fast acquisition and synchronization method of wireless burst communication system |
| CN112003626A (en) * | 2020-08-31 | 2020-11-27 | 武汉梦芯科技有限公司 | LDPC decoding method, system and medium based on known bits of navigation message |
| CN112003626B (en) * | 2020-08-31 | 2023-11-10 | 武汉梦芯科技有限公司 | LDPC decoding method, system and medium based on navigation message known bits |
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Application publication date: 20170620 |