CN103439705B - Based on the range measurement system of the discontinuous nonperiodic signal of GMSK modulation - Google Patents
Based on the range measurement system of the discontinuous nonperiodic signal of GMSK modulation Download PDFInfo
- Publication number
- CN103439705B CN103439705B CN201310367950.3A CN201310367950A CN103439705B CN 103439705 B CN103439705 B CN 103439705B CN 201310367950 A CN201310367950 A CN 201310367950A CN 103439705 B CN103439705 B CN 103439705B
- Authority
- CN
- China
- Prior art keywords
- module
- signal
- sequence
- time delay
- gmsk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
Based on the range measurement system of the discontinuous nonperiodic signal of GMSK modulation, comprise Base-station Transmission System, high-precise synchronization atomic clock and receiver terminal equipment, described Base-station Transmission System comprises multiple Base Transmitter equipment, Base Transmitter equipment produces fixing M sequence in the middle of the beginning flag position of text and textual information, by the temporal information containing M sequence initial time in textual information, the complete text formed carrys out modulated carrier by GMSK mode.Utilizing when parsing text beginning flag position multiple time delay module to carry out time delay to the M sequence that M sequence generation module produces, obtaining the sequence of multiple time delay at equal intervals, carry out related operation with the signal peeled off after carrier wave respectively, obtain multiple correlation.Processor recovers the correlation properties curve of M sequence according to correlation, just can judge the transmission delay of signal, and then obtain distance measurement value.Utilize the present invention can find range based on GMSK modulation signal, for the positioning function realizing GMSK communication system lays the foundation.
Description
Technical field
the invention belongs to wireless navigation field, relate to continental rise location and radio communication cross-application subject, be specifically related to a kind of range measurement system of the discontinuous nonperiodic signal based on Gaussian-filtered minimum shift keying modulation (GMSK, GaussianfilteredMinimumShiftKeying).
Background technology
gMSK signal has good frequency spectrum and power characteristic, the availability of frequency spectrum and the communication quality of system can be improved, therefore it is widely used in ship automatic identification system (AIS, AutomaticidentificationSystem), the communication systems such as global mobile communication (GSM, GlobalSystemofMobilecommunication).The fragility of satellite navigation system and people are to the demand of the complex environment location such as indoor, inclement weather, and the research that determine increases navigation locating function in the communication system infrastructure of existing widespread use is highly significant.But, existing range positioning system is all based on continuous print periodic signal, easily realize distance measurement function, and the communication system employings such as AIS, GSM is GMSK debud mode, signal after modulation is not single-frequency, and system has the random time interval between twice communication, the signal that is communicated is discontinuous aperiodic.Therefore, be necessary the ranging technology furtheing investigate this discontinuous nonperiodic signal based on GMSK modulation, thus lay the foundation for the positioning function realizing GMSK communication system.
Summary of the invention
object of the present invention is just to provide a kind of range measurement system of the discontinuous nonperiodic signal based on GMSK modulation, it utilizes the hardware facility of existing GMSK communication system base station, according to the signal measurement receiver of the Base Transmitter distance to base station, for the positioning function realizing GMSK communication system provides original distance measurement value.
to achieve these goals, technical scheme of the present invention is as follows:
based on the range measurement system of the discontinuous nonperiodic signal of GMSK modulation, comprise Base-station Transmission System 1, high-precise synchronization atomic clock 2 and receiver terminal equipment 3;
described Base-station Transmission System 1 comprises multiple Base Transmitter equipment 4, and described multiple Base Transmitter equipment 4 positions are fixed, and carry out time synchronized by high-precise synchronization atomic clock 2;
described Base Transmitter equipment 4 is made up of digital mid-frequency signal generator 5, D/A conversion module 6 and up-converter module 7, fixing M sequence is produced in the middle of the beginning flag position of launching text and textual information, by the temporal information containing M sequence initial time in textual information, the complete text formed carrys out modulated carrier by GMSK mode;
described receiver terminal equipment 3 comprises down conversion module 8, AD conversion module 9 and digital medium-frequency signal processor 10;
described digital medium-frequency signal processor 10 is made up of carrier wave strip module 11, M sequence generation module 12, time delay module 13, computing module 14, decoder module 15 and processor module 16; Received signal strength is through down conversion module 8 and AD conversion module 9, become digital medium-frequency signal, in digital medium-frequency signal processor 10, signal is after the process of carrier wave strip module 11 and decoder module 15, just can recover original textual information, the normal communication function of the system that realizes, and the rough tracking to input signal is realized when parsing text beginning flag position; After tracing into input signal roughly, the M sequence utilizing multiple time delay module 13 pairs of M sequence generation modules 12 to produce carries out time delay, obtains the sequence of N number of time delay at equal intervals, carries out related operation respectively with the signal after carrier wave strip module 11; Processor recovers the correlation properties curve 17 of M sequence according to correlation, just can judge the transmission delay of signal, thus provides original distance measurement value for the positioning function realizing system.
concrete treatment step is as follows:
1) in the digital mid-frequency signal generator 5 of Base Transmitter equipment 4, generate fixing M sequence, between the beginning flag position being added on transmitting text and telegraph text content, and the temporal information of M sequence initial time is added in text, adopt GMSK mode modulated carrier after text is encoded.
2) signal after modulation through D/A conversion module 6 and up-converter module 7, then is gone out by antenna transmission after power amplification.
3) receiver terminal equipment 3 by the signal that receives after the process of down conversion module 8 and AD conversion module 9, access digital medium-frequency signal processor 10.
4) in digital medium-frequency signal processor 10, first Received signal strength carries out carrier wave stripping through carrier wave strip module 11, and signal is through decoder module 15 afterwards, resolves text.
5) processor module 16 is according to the text beginning flag position parsed, rough tracking input signal, then M sequence generation module 12 is controlled, the M sequence making it produce is through multiple time delay module 13, obtain the sequence of N number of time delay at equal intervals, carry out related operation with the signal peeled off after carrier wave respectively, operation result gives processor.
6) processor module 16 is according to the result of related operation, recovers the correlation properties curve 17 of M sequence, and can obtain Signal transmissions time delay accurately thus.
the invention has the beneficial effects as follows: utilize the present invention can find range based on the discontinuous nonperiodic signal of GMSK modulation, for the positioning function realizing GMSK communication system lays the foundation.
Accompanying drawing explanation
fig. 1 is the structured flowchart of the range measurement system of the discontinuous nonperiodic signal based on GMSK modulation of the present invention;
fig. 2 is the structured flowchart of Base Transmitter equipment of the present invention.
fig. 3 is the structured flowchart of receiver terminal equipment of the present invention.
fig. 4 is the M sequence correlation properties curve map that the present invention recovers.
in figure: 1, Base-station Transmission System, 2, high-precise synchronization atomic clock, 3, receiver terminal equipment, 4, Base Transmitter equipment, 5, digital mid-frequency signal generator, 6, D/A conversion module, 7, up-converter module, 8, down conversion module, 9, AD conversion module, 10, digital medium-frequency signal processor, 11, carrier wave strip module, 12, M sequence generation module, 13, time delay module, 14, computing module, 15, decoder module, 16, processor module, 17, recover M sequence correlation properties curve.
Embodiment
below, apply the present invention to AIS communication system, by example, the present invention will be further described.
embodiment one:
(1) AIS base station transmit signals
aIS Base Transmitter equipment is from the time slot initial time of 10:46 on March 20 2013 UTC time, send 24 priori sequences (010101010101010101010101) successively, 8 beginning flag positions (01111110), 15 M sequence (111101011001000), text number (20), AIS base station MMSI(04113125), latitude (3843.563792), longitude (12125.267379), highly (0095.3758).
(2) watercraft AIS terminal device Received signal strength range finding
first by the decoder module 15 in digital medium-frequency signal processor 10, parse priori sequence and beginning flag position, realize the rough tracking to input signal, then the signal produced after the M sequence and stripping carrier wave that 32 delay intervals are 10us carries out related calculation, obtain 32 groups of correlations, processor 16 recovers the correlation properties curve of M sequence according to these numerical value, and obtaining Signal transmissions time delay by the position of maximal value is 46583ns, can record the distance of terminal to base station thus
.
Claims (1)
1. based on the range measurement system of the discontinuous nonperiodic signal of GMSK modulation, it is characterized in that, comprise Base-station Transmission System (1), high-precise synchronization atomic clock (2) and receiver terminal equipment (3); Described receiver terminal equipment (3) comprises down conversion module (8), AD conversion module (9) and digital medium-frequency signal processor (10); Described digital medium-frequency signal processor (10) is made up of carrier wave strip module (11), M sequence generation module (12), time delay module (13), computing module (14), decoder module (15) and processor module (16); Received signal strength is through down conversion module (8) and AD conversion module (9), become digital medium-frequency signal, in digital medium-frequency signal processor (10), signal is after the process of carrier wave strip module (11) and decoder module (15), just can recover original textual information, the normal communication function of the system that realizes, and the rough tracking to input signal is realized when parsing text beginning flag position; After tracing into input signal roughly, multiple time delay module (13) is utilized to carry out time delay to the M sequence that M sequence generation module (12) produces, obtain the sequence of N number of time delay at equal intervals, carry out related operation with the signal after carrier wave strip module (11) respectively; Processor recovers the correlation properties curve (17) of M sequence according to correlation, just can judge the transmission delay of signal, thus provides original distance measurement value for the positioning function realizing system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310367950.3A CN103439705B (en) | 2013-08-22 | 2013-08-22 | Based on the range measurement system of the discontinuous nonperiodic signal of GMSK modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310367950.3A CN103439705B (en) | 2013-08-22 | 2013-08-22 | Based on the range measurement system of the discontinuous nonperiodic signal of GMSK modulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103439705A CN103439705A (en) | 2013-12-11 |
| CN103439705B true CN103439705B (en) | 2016-01-20 |
Family
ID=49693410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310367950.3A Expired - Fee Related CN103439705B (en) | 2013-08-22 | 2013-08-22 | Based on the range measurement system of the discontinuous nonperiodic signal of GMSK modulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103439705B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109951410A (en) * | 2019-02-19 | 2019-06-28 | 大连海事大学 | A kind of Holographic test system of AIS live signal |
| CN110398713A (en) * | 2019-07-29 | 2019-11-01 | 相维(北京)科技有限公司 | A method of receiver motion state is detected using wireless signal |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2851383A1 (en) * | 2003-02-17 | 2004-08-20 | Wavecom | Wireless data transmitting process for universal mobile telecommunication system, involves estimating response of transmission channel of data transmission signal by taking into account simple carrier pilot signal |
| CN103209143B (en) * | 2013-01-21 | 2016-02-03 | 天津理工大学 | A kind of data assist under spaceborne ais signal synchronization parameter method of estimation and system |
-
2013
- 2013-08-22 CN CN201310367950.3A patent/CN103439705B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103439705A (en) | 2013-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104244401B (en) | A kind of wireless communications method based on satellite time transfer and device | |
| JP2012531869A (en) | Communications system | |
| DE602005018258D1 (en) | DATA COMMUNICATION DEVICE WITH MULTIPLE ANTENNAS | |
| CN101702827B (en) | TOA positioning estimation method and precise positioning method based on same | |
| EP4319078A3 (en) | Transmitter, receiver, transmission method and reception method | |
| WO2009020376A8 (en) | Method and apparatus for forming signals in wireless communication systems | |
| Chen et al. | Super-resolution time of arrival estimation for a symbiotic FM radio data system | |
| CN105323198A (en) | Method for carrying out underwater signal transmission and reception by using hyperbolic frequency modulation | |
| CN103475614A (en) | Method and device for frequency offset estimation and compensation | |
| KR20130063940A (en) | Uplink synchronization method between terminal and base station | |
| CN103439705B (en) | Based on the range measurement system of the discontinuous nonperiodic signal of GMSK modulation | |
| CN110138416B (en) | Satellite-borne AIS ship wired multi-channel detection probability test method | |
| KR20170018017A (en) | Radio communication | |
| Bronk et al. | Concept, signal design, and measurement studies of the R‐mode Baltic system | |
| CN114257956A (en) | MIMO pseudo satellite system base station device | |
| CN101977293A (en) | Method for estimating time delay of ground broadcast signals of digital television | |
| US10470184B2 (en) | LTE-based wireless communication system for the M-LMS band | |
| WO2016147117A1 (en) | Improved synchronization in the presence of large initial frequency error | |
| CN204069357U (en) | A kind of radio communication device based on satellite time transfer | |
| CN103869335A (en) | Generation method for complex carrier navigation signal | |
| CN102256352B (en) | Positioning method based on physical layer pipeline technology | |
| CN203930046U (en) | A kind of indoor locating system based on pseudo satellite, pseudolite | |
| CN103439687B (en) | A kind of measuring system of VHF signal additional secondary phase factor | |
| CN110266345A (en) | Telemetering frequency-hopping communication method based on two-dimentional hopping pattern | |
| CN204408636U (en) | A kind of AFLT location Calculation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20180822 |