CN104954098B - A kind of CORS data encoding transmission methods for being applicable long haul communication - Google Patents
A kind of CORS data encoding transmission methods for being applicable long haul communication Download PDFInfo
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- CN104954098B CN104954098B CN201510279951.1A CN201510279951A CN104954098B CN 104954098 B CN104954098 B CN 104954098B CN 201510279951 A CN201510279951 A CN 201510279951A CN 104954098 B CN104954098 B CN 104954098B
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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
-
- 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
- H04L1/0042—Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
The invention discloses a kind of CORS data encoding transmission methods for being applicable long haul communication, this method comprises the following steps：Beidou receiver on Big Dipper CORS cars receives data, and is sent to CORS service systems；Differential data information in CORS data is grouped；Anti-interference coding is carried out respectively to two group informations；Data after coding are sent to high-power ultrashort wave radio set by industrial computer by ultrashort wave interface；High-power ultrashort wave radio set sends the data to distance reception end radio station, completes the transmission of data；The data of reception are transferred to industrial computer and decoded by receiving terminal radio station；Decoded CORS data are sent to background server, complete the transmission of CORS data.This method is by using Big Dipper CORS cars and high-power ultrashort wave radio set, CORS differential datas, which are extracted and encoded, realizes the long range credible delivery of CORS data, reduce the bit error rate of CORS data long distances communication, communication quality is improved, is destroyed especially suitable for communications service or situation without communication signal.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of CORS data encodings transmission side for being applicable long haul communication
Method.
Background technology
Beidou satellite navigation system can provide high accuracy, highly reliable positioning, navigation and time service service, have navigation and
Communicate the service characteristics being combined.By the development of 19 years, this system was in mapping, fishery, communications and transportation, telecommunications, water conservancy, gloomy
The numerous areas such as woods fire prevention, the mitigation disaster relief and national security are applied, and generate significant economic benefit and social benefit, special
It is not to have played very important effect in Wenchuan County in Sichuan, Yushu district, Qinghai earthquake relief work.
Some disasters occur or case of emergency under, when infrastructure and communications service are destroyed, Big Dipper CORS
Car can play the advantage of its mobile site, the Wireless Telecom Equipment carried using it, realize between each CORS cars point position and
Communicative between CORS cars point position and headquarter.But due to the limitation of mobile CORS car self-conditions, to realize and tradition
3G, 4G communication modes identical at a distance the transmission of two-way trust data be it is impossible, inevitably there is it is long away from
From transmission when due to signal fadeout, noise and interference caused by bust this, transmission error code the problems such as.Under normal conditions,
CORS base stations are without considering due to data transmission problems caused by error code caused by communication link or bust this, because conventional
Communications facility has certain error correction or retransmission mechanism in itself.It is but limited based on mobile CORS under disaster or emergency environmental
Communication capacity and one-way transmission limitation, error of transmission will have a strong impact on the performance of CORS high accuracy positioning service functions, when serious
Even result in service failure.The maximum effect of Big Dipper CORS cars can not thus be played.
In order to be destroyed in original communications facility or without in the environment of communication condition, be carried using mobile CORS cars logical
Exist when believing equipment long range one-way transmission under certain error condition, realize the transmitting of CORS data as far as possible, and it is comprehensive
Consider that CORS cars provide the coverage and economy of service, the present invention proposes is applied to CORS difference based on fault-tolerant encoding
The coding and transmission method of location data One-to-All Broadcast.
The content of the invention
The technical problem to be solved in the present invention is not accounting for communications error code in for existing CORS station technologies
The defects of, there is provided it is a kind of towards false channel one-way transmission, suitable for the broadcast of long range CORS Differential positionings service data
Coding and transfer control method, this method is by carrying out anti-error code coding and control different type number to CORS Differential positionings data
According to broadcast the cycle, using Big Dipper CORS cars and high-power ultrashort wave radio set, realize the big models of CORS high accuracy positioning data
Broadcast service is enclosed, influence of the transmission error code caused by reducing long haul communication to CORS service quality and effectively utilizes communication band
It is wide.
The technical solution adopted for the present invention to solve the technical problems is：A kind of CORS data for being applicable long haul communication are compiled
Decoding transmission method, comprise the following steps：
1) before broadcast is transmitted, the differential data of CORS services is grouped, is divided into height and broadcasts frequency information group, is wrapped
Include Big Dipper epoch, GPS epoch, GLN epoch and antenna condition information；And it is low broadcast frequency information group, including CORS reference stations are sat
Mark, CORS reference stations aerial information and receiver description information；
2) anti-interference coding is carried out respectively to two component group informations；
4) the data ultrashort wave radio set after will be encoded is broadcast with different frequencies of broadcasting；
5) ultrashort wave radio set sends the data to distance reception end radio station, completes the transmission of data；
6) data of reception are transferred to industrial computer and decoded by receiving terminal radio station；
7) decoded CORS data are sent into terminal positioning to resolve, complete the transmission of CORS data.
By such scheme, in the step 3), broadcast height frequency information and carried out using highly redundant anti-interference coding mode
Coding, is encoded to low frequency information of broadcasting using highly redundant anti-interference coding mode.
By such scheme, in the step 3), broadcast height frequency information and encoded using FEC (3/4) coded system,
Low frequency information of broadcasting is encoded using FEC (7/8) coded system.
The beneficial effect comprise that：This method is led to by using Big Dipper CORS cars and high-power ultrashort wave radio set
Cross CORS differential datas and extracted and encoded the long range credible delivery for realizing CORS data, improve CORS data length away from
From the anti-error code capacity of communication, communication quality is improved, is destroyed especially suitable for communications service or situation without communication signal.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the method flow diagram of the embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is not used to limit only to explain the present invention
The fixed present invention.
As shown in figure 1, a kind of CORS data encoding transmission methods for being applicable long haul communication, comprise the following steps：
1) Beidou receiver on Big Dipper CORS cars receives data, and is sent to CORS service systems；
2) CORS service systems are grouped to the differential data information in CORS data, including Big Dipper epoch, GPS are gone through
The height of member, GLN epoch and antenna condition information broadcasts frequency information, and including CORS reference station coordinates, CORS reference stations day
Line information and the low of receiver description information broadcast frequency information；
In general, CORS systems can be determined according to GNSS mobile terminal service demands broadcasting BDS or GPS worldwide navigations
During the real time dynamic differential data of position system, multiple combinations form can be used, different navigation is carried with different message numbers
Moonscope amount data.GNSS mobile terminals are when carrying out real time dynamic differential positioning, except needing CORS reference stations are visible to defend
Outside star observed quantity, it is also necessary to which CORS reference station coordinates and CORS refer to two key messages of station antenna.
Differential data is defined as follows shown in table：
| Type of message | Message id | Transmission frequency |
| Big Dipper epoch | ||
| GPS epoch | 1004 | 1 second |
| GLN epoch | 1012 | 1 second |
| Reference station coordinates information | 1006 | 15 seconds |
| Reference station aerial information | 1008 | 1 second |
| Receiver describes | 1033 | 15 seconds |
| Antenna condition information | 4079 | 1 second |
3) anti-interference coding is carried out respectively to two group informations；
Broadcast height frequency information to encode using highly redundant anti-interference coding mode, low frequency information of broadcasting is used
Highly redundant anti-interference coding mode is encoded.
Application claims ensure compatibility of the differential data before broadcast and after reception；But exist in long range communicates each
Kind of distortion and noise, the problem of making the data in transmitting procedure change, error correction is carried out using channel coding method and very must
Will, by the transmitting in long range communication and reception both ends, different codings is carried out on demand to different differential messages respectively.This hair
It is bright to use FEC forward error correction coding technologies, by interpolation data redundancy, anti-error code, data are improved in long range transmitting procedure
Quality.
4) data after coding are sent to high-power ultrashort wave radio set by CORS service systems by ultrashort wave interface；
5) high-power ultrashort wave radio set emitter sends the data to distance reception end radio station, completes the transmission of data；
6) data of reception are transferred to industrial computer and carry out fec decoder by receiving terminal radio station；
7) decoded CORS data are sent to background server, complete the transmission of CORS data.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (1)
1. a kind of CORS data encoding transmission methods for being applicable long haul communication, comprise the following steps：
1）Beidou receiver on Big Dipper CORS cars receives data, and is sent to CORS service systems；
2）Differential data information in CORS data is grouped, including Big Dipper epoch, GPS epoch, GLN epoch and antenna-like
The height of state information broadcasts frequency information, and is described including CORS reference station coordinates, CORS reference stations aerial information and receiver
The low of information broadcasts frequency information；
3）Broadcast height frequency information and low frequency information this two group information broadcast carries out anti-interference coding respectively；Coded system has
Body is as follows：Broadcast height frequency information and use FEC（3/4）Coded system is encoded, and FEC is used to low frequency information of broadcasting
（7/8）Coded system is encoded；
4）Data after coding are sent to high-power ultrashort wave radio set by CORS service systems by ultrashort wave interface；
5）High-power ultrashort wave radio set sends the data to distance reception end radio station, completes the transmission of data；
6）The data of reception are transferred to industrial computer and decoded by receiving terminal radio station；
7）Decoded CORS data are sent to background server, complete the transmission of CORS data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510279951.1A CN104954098B (en) | 2015-05-27 | 2015-05-27 | A kind of CORS data encoding transmission methods for being applicable long haul communication |
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| CN201510279951.1A CN104954098B (en) | 2015-05-27 | 2015-05-27 | A kind of CORS data encoding transmission methods for being applicable long haul communication |
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| CN108496122A (en) * | 2017-05-31 | 2018-09-04 | 深圳市大疆创新科技有限公司 | Control terminal and its control method, moveable platform and its control method |
| CN115037356A (en) * | 2022-06-08 | 2022-09-09 | 中山大学 | Data subpackaging method and system for Beidou third RDSS link |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675858A (en) * | 2013-12-30 | 2014-03-26 | 辽宁工程技术大学 | B1/L1 carrier phase frequency mixing difference method for Beidou system and GPS (Global Positioning System) |
| CN103778687A (en) * | 2014-01-08 | 2014-05-07 | 广西鑫朗通信技术有限公司 | High-efficiency transmission system for vehicle wireless video monitoring |
| CN103885069A (en) * | 2014-04-11 | 2014-06-25 | 广东省天然气管网有限公司 | Long-distance pipeline GPS control measurement method based on CORS |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675858A (en) * | 2013-12-30 | 2014-03-26 | 辽宁工程技术大学 | B1/L1 carrier phase frequency mixing difference method for Beidou system and GPS (Global Positioning System) |
| CN103778687A (en) * | 2014-01-08 | 2014-05-07 | 广西鑫朗通信技术有限公司 | High-efficiency transmission system for vehicle wireless video monitoring |
| CN103885069A (en) * | 2014-04-11 | 2014-06-25 | 广东省天然气管网有限公司 | Long-distance pipeline GPS control measurement method based on CORS |
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