CN102565817A - Roland-C timing signal simulator - Google Patents
Roland-C timing signal simulator Download PDFInfo
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- CN102565817A CN102565817A CN2011104452733A CN201110445273A CN102565817A CN 102565817 A CN102565817 A CN 102565817A CN 2011104452733 A CN2011104452733 A CN 2011104452733A CN 201110445273 A CN201110445273 A CN 201110445273A CN 102565817 A CN102565817 A CN 102565817A
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Abstract
The invention relates to a Roland-C timing signal simulator, wherein the Roland-C timing signal simulator is characterized in that: a simulator master control unit configures correlation parameters of the simulator according to an input of an array keyboard, and outputs the information out of a signal simulating unit; the signal simulating unit simulates and generates four paths of signals to output to a signal synthesis regulation unit according to the correlation parameters; the signal synthesis regulation unit converts the four paths of digital signals into analogue signals, and generates and outputs a Roland-C timing signal; a time frequency benchmark unit outputs a 10MHz of frequency signal to the signal simulating unit, outputs an IPPS (Intelligent Portrait-Producing System) timing signal to the signal simulating unit and outputs time information to the simulator master control unit. The Roland-C timing signal simulator, disclosed by the invention, can simulate a wavelength timing signal transmitted by a Roland-C station at any place, and take account of instantaneity of the timing signal so as to meet requirements of Roland-C system construction, and maintenance and the requirements of research and debugging, time delay calibration, anti-noise and anti-jamming performance tests and the like of a Roland-C timing receiver.
Description
Technical field
The present invention relates to a kind of Loran-C timing signal simulator; Belong to the Signal and Information Processing technical field; Be particularly related to the Loran-C timing signal simulator, the development, debugging, the time delay that are used to the Loran-C timing receiver are demarcated and fixed pumping signal and the emulated data that simulation is provided of examining.
Background technology
Rowland (Long range navigation; Loran)-the C system is the large-scale based Wireless Navigation time dissemination system of the autonomous remote high-precision of grasping of a kind of China; Have advantages such as operating distance is far away, bearing accuracy is high, good stability, good reliability; Its basic functions is navigator fix and regularly calibrating frequency, secondly can also be used for communication and scientific researches such as radio wave propagation, ionosphere and meteorology.
Rowland-C system mainly utilizes the characteristics that the stability, propagation delay of the long-wave signal propagation of ground wave can accurately predicting, and the frequency signal that is used for broadcast precise time information and standard is realized high precision time service function.The Loran-C timing receiver is the final device that realizes systemic-function; It mainly acts on is standard-frequency signal and the standard time information that in timing system, receives rowland-C station broadcast; Realize local time signal and time reference signal UTC (NTSC) synchronous (regularly), the frequency deviation (calibrating frequency) of calibrating local frequency signal and standard-frequency signal.Therefore, rowland-C system is widely used in timing system, for national defence scientific researches such as guided missile, space flight experiment provides standard time and standard-frequency signal, to realize the unification of whole experimental system time and frequency.
Completion along with China BPL long wave time dissemination system and " No. two, long river " system's state-of-the-art technology upgrading; The rowland of China-C system has realized the broadcast of time-code data message; And accomplished the synchronous of " No. two, long river " system and national standard time UTC (NTSC); So the user of known geographical locations can use rowland-C receiver to obtain the frequency information of precise time information and standard, thereby the navigation, the time service that have realized China rowland-C system (BPL long wave time dissemination system and " No. two, long river " navigational system) are integrated.
At present, complicated day by day along with electromagnetic environment, at the field adjustable of rowland-C system, Performance Evaluation, plant maintenance and in the development process of Loran-C timing receiver, more and more urgent to the demand of the Loran-C timing signal simulator of perfect in shape and function.Therefore, the Loran-C timing signal simulator of convenient, simple to operate, cheap, the perfect in shape and function of development and design is to the construction and the development of China rowland-C system and develop novel Loran-C timing receiver very important meaning is arranged.
Summary of the invention
The technical matters that solves
Weak point for fear of prior art; The present invention proposes a kind of Loran-C timing signal simulator; Solve the demand of China rowland-C system construction development and Loran-C timing receiver research; A kind of perfect in shape and function, simple to operate and extendible Loran-C timing signal simulator are proposed; Be implemented in the long wave time signal of simulating rowland-C station broadcast Anywhere, and take into account the real-time of time signal, to satisfy rowland-C system construction and maintenance needs and Loran-C timing receiver development debugging, time delay demarcation and demands such as anti-noise and interference free performance test.
Technical scheme
A kind of Loran-C timing signal simulator is characterized in that comprising simulator main control unit, temporal frequency reference cell, signal imitation unit and Signal Regulation synthesis unit; The simulator main control unit is configured the simulator correlation parameter according to the input of array keyboard, simultaneously the temporal information of input is carried out layout according to rowland-C message format, and exports above-mentioned information to connect with it signal imitation unit; Simulation produces Loran-C timing earthwave signal, sky wave singal, random noise and continuous wave according to correlation parameter in the signal imitation unit, and exports this four road signal to the signal that connects with it synthetic regulon; The synthetic regulon of signal becomes simulating signal with four way word conversion of signals, produces and output Loran-C timing signal; The temporal frequency reference cell carries out the selection of frequency and time source according to the time-frequency parameter that the simulator main control unit inputs to this unit; Output 10MHz frequency signal is to the signal imitation unit; Export the 1PPS timing signal to the signal imitation unit, output time information to simulator main control unit; Described correlation parameter is: signal parameter, day wave parameter, continuous wave parameter, signal to noise ratio (S/N ratio), time-frequency parameter and signal amplitude are regulated parameter.
Said simulator main control unit comprises array keyboard, LCDs, data reception module, display control module and data processing modular converter; The correlation parameter information of the configuration of data reception module receiving array keyboard input converts binary data and output to through the data processing conversion module, simultaneously the signal of exporting is transferred to LCDs and shows.
Said temporal frequency reference cell comprises GPS timing receiver, constant-temperature crystal oscillator, two digital phase-locked loops, frequency selector and time source selector switchs; The 10MHz frequency signal of outside input exports frequency selector to through first digital phase-locked loop; The 10MHz frequency signal that constant-temperature crystal oscillator produces exports frequency selector to through second digital phase-locked loop, and frequency selector selects to switch output 10MHz frequency signal to two 10MHz frequency signals of input according to the preferential principle of outside input 10MHz frequency signal of selecting automatically; The GPS timing receiver exports the temporal information and the 1PPS timing signal that receive to the time source selector switch; The time source selector switch is judged temporal information, the 1PPS timing signal of temporal information, 1PPS timing signal and the outside input of the input of GPS timing receiver; Automatically select to switch according to the preferential principle of outside input of selecting, then output time information and 1PPS timing signal.
Said signal imitation unit comprises rowland-C signal imitation module, Eurofix coding module, modulation module, Postponement module, random noise analog module and continuous wave analog module; Textual information is encoded with rowland-C coding rule through the Eurofix coding module, becomes modulation voltage to export modulation module to the data-switching behind the coding; Modulation module carries out the modulation of tri-state impulse displacement word balance according to the modulation voltage of input to standard Loran-C signal waveform, generates Loran-C timing earthwave signal and exports Postponement module to; Postponement module postpones to generate sky wave singal output according to the sky wave parameter of input with Loran-C timing earthwave signal; Rowland-C signal imitation module receives signal parameter, produces standard Loran-C signal with rowland-C number of signals value model and exports modulation module to; The random noise generation module produces random noise and output according to the signal to noise ratio (S/N ratio) and the NF model of input; The continuous wave generation module produces continuous wave and output according to the continuous wave parameter and the numerical model of input.
The synthetic regulon of said signal comprises D/A converter module, amplitude adjusted module, signal synthesizing module and oval filtration module; D/A converter module converts the Loran-C timing earthwave signal, sky wave singal, random noise and the continuous wave signal that receive to simulating signal and exports the amplitude adjusted module to; The amplitude adjusted module is regulated parameter according to the signal amplitude of input, and the amplitude of every road signal is regulated control, exports signal to signal synthesizing module then; Signal synthesizing module adopts four road power that Loran-C timing earthwave signal, sky wave singal, random noise and continuous wave signal are synthesized coupling, and the oval filtering of process at last is after N type interface output Loran-C timing signal.
Beneficial effect
A kind of Loran-C timing signal simulator major function that the present invention proposes comprises: real time modelling produces the continuously adjustable rowland of level-C earthwave time signal, day interference wave signal, continuous wave undesired signal and random noise signal; Output form can be the wherein single a kind of signal or the mixed signal of any several kinds of signals; The Eurofix technology that time signal adopts China rowland-C system to use is carried out modulating-coding, and can be poor to earthwave signal packet week, signal to noise ratio (S/N ratio), sky wave delay etc. mainly correlation parameter regulate.
Mainly have the following advantages:
(1) the present invention adopts international rowland-C signal system and carries out the Eurofix modulating-coding, the time signal of real simulation China rowland-C station broadcast;
(2) the present invention provides basic working modes, adds the mode of operation of making an uproar, day wave interference mode of operation and continuous wave disturb mode of operation totally four kinds of mode of operations; Can be applied to multiple uses such as the demarcation of receiver time delay, receiver anti-noise and anti-interference capability testing; The user can select arbitrarily according to actual conditions, and is applied widely;
(3) the present invention provide simultaneously internal time source, external time source and built-in set time information, the user can select according to different environments for use;
(4) the frequency marking autoselector of the present invention design detects outside frequency marking automatically and automaticallyes switch, and is easy to use;
(5) the present invention is built-in GPS timing receiver can provide the Loran-C timing signal of modulated in real time coding, is convenient to the user time delay of rowland-C receiver is demarcated;
(6) the present invention adopts modular design, increases port number and can realize rowland-C navigation signal analog functuion, has higher maintainability and extensibility.
Description of drawings
Fig. 1: be system architecture diagram of the present invention
Fig. 2: be simulator main control unit structured flowchart of the present invention
Fig. 3: be temporal frequency reference cell structured flowchart of the present invention
Fig. 4: be signal imitation cellular construction block diagram of the present invention
Fig. 5: be the synthetic regulon structured flowchart of signal of the present invention
Embodiment
Combine embodiment, accompanying drawing that the present invention is further described at present:
With reference to Fig. 1, Loran-C timing signal simulator of the present invention comprises simulator main control unit, temporal frequency reference cell, signal imitation unit and Signal Regulation synthesis unit.Wherein, The simulator main control unit is configured simulator related work parameter according to the input of array keyboard; Comprise signal parameter, day wave parameter, continuous wave parameter, signal to noise ratio (S/N ratio), time-frequency parameter and signal amplitude adjusting parameter, simultaneously the temporal information of input is carried out layout according to rowland-C message format; The temporal frequency reference cell carries out the selection of frequency and time source according to the time-frequency parameter of input, output 10MHz frequency signal, 1PPS timing signal and temporal information; The signal imitation unit produces Loran-C timing earthwave signal, sky wave singal, random noise, continuous wave according to the correlation parameter simulation that the simulator main control unit provides, and gives signal synthetic regulon this four road signal; The synthetic regulon of signal becomes simulating signal with four way word conversion of signals, and through amplitude adjusted, power is synthetic with oval filtering after export, thereby produced the Loran-C timing signal.
With reference to Fig. 2, simulator main control unit of the present invention comprises array keyboard, LCDs, data reception module, display control module and data processing modular converter.Wherein, the array keyboard comprises 4 * 3 numeric keypad and 2 * 3 function keyboard, is mainly used in the input of configuration parameter; LCDs adopts 192 * 64, is mainly used in the demonstration of duty; Data reception module, data processing conversion module and display control module adopt ARM LPC2214 to realize; Be mainly used in the configuration parameter of keyboard input and the binary data of easy identification of the reception of temporal frequency reference cell information input time and the system that converts to and processing, realize control simultaneously LCDs.
With reference to Fig. 3, temporal frequency reference cell of the present invention mainly comprises GPS timing receiver, constant-temperature crystal oscillator, two digital phase-locked loops, frequency selector and time source selector switchs.Wherein, the GPS timing receiver provides temporal information and 1PPS timing signal for simulator work; Constant-temperature crystal oscillator adopts the output of 10MHz frequency, for simulator work provides frequency signal; Digital phase-locked loop adopts the built-in IP kernel modules A LTPLL of FPGA to realize; Frequency selector and time source selector switch adopt the built-in IP kernel module LPM_MUX of FPGA to realize; FPGA adopts the EP2C70 chip of altera corp, and being connected with 16 bit address lines with use 32 position datawires between the ARM communicates.
With reference to Fig. 4, the signal imitation unit among the present invention mainly comprises rowland-C signal imitation module, Eurofix coding module, modulation module, Postponement module, random noise analog module and continuous wave analog module mainly based on the FPGA Platform Implementation.Wherein, rowland-C signal imitation module produces standard Loran-C signal according to the signal parameter and the rowland-C number of signals value model of input; The Eurofix coding module becomes modulation voltage according to the textual information of input with data-switching after rowland-C coding rule is encoded and will be encoded; Modulation module carries out the modulation of tri-state impulse displacement word balance according to the modulation voltage of input to standard Loran-C signal waveform and generates Loran-C timing earthwave signal; Postponement module postpones to generate sky wave singal according to the sky wave parameter of input with the earthwave signal; The random noise generation module is according to the signal to noise ratio (S/N ratio) and the NF model generation random noise of input; The continuous wave generation module produces continuous wave according to the continuous wave parameter and the numerical model of input.
With reference to Fig. 5, the synthetic regulon of the signal among the present invention mainly comprises D/A converter module, amplitude adjusted module, signal synthesizing module and oval filtration module.Wherein, D/A converter module adopts DAC AD9744 to realize that the four way word conversion of signals that completion will be imported become simulating signal; The amplitude adjusted module adopts amplifier AD8041 and numerical-control attenuator HMC472 to realize, regulates parameter according to the signal amplitude of input and accomplishes the amplitude adjusted control to every road signal; Signal synthesizing module adopts the synthetic adaptation of four road power to realize, the oval filtering of process at last is after N type interface output Loran-C timing signal.
Claims (5)
1. a Loran-C timing signal simulator is characterized in that comprising simulator main control unit, temporal frequency reference cell, signal imitation unit and Signal Regulation synthesis unit; The simulator main control unit is configured the simulator correlation parameter according to the input of array keyboard, simultaneously the temporal information of input is carried out layout according to rowland-C message format, and exports above-mentioned information to connect with it signal imitation unit; Simulation produces Loran-C timing earthwave signal, sky wave singal, random noise and continuous wave according to correlation parameter in the signal imitation unit, and exports this four road signal to the signal that connects with it synthetic regulon; The synthetic regulon of signal becomes simulating signal with four way word conversion of signals, produces and output Loran-C timing signal; The temporal frequency reference cell carries out the selection of frequency and time source according to the time-frequency parameter that the simulator main control unit inputs to this unit; Output 10MHz frequency signal is to the signal imitation unit; Export the 1PPS timing signal to the signal imitation unit, output time information to simulator main control unit; Described correlation parameter is: signal parameter, day wave parameter, continuous wave parameter, signal to noise ratio (S/N ratio), time-frequency parameter and signal amplitude are regulated parameter.
2. Loran-C timing signal simulator according to claim 1 is characterized in that: said simulator main control unit comprises array keyboard, LCDs, data reception module, display control module and data processing modular converter; The correlation parameter information of the configuration of data reception module receiving array keyboard input converts binary data and output to through the data processing conversion module, simultaneously the signal of exporting is transferred to LCDs and shows.
3. Loran-C timing signal simulator according to claim 1 is characterized in that: said temporal frequency reference cell comprises GPS timing receiver, constant-temperature crystal oscillator, two digital phase-locked loops, frequency selector and time source selector switchs; The 10MHz frequency signal of outside input exports frequency selector to through first digital phase-locked loop; The 10MHz frequency signal that constant-temperature crystal oscillator produces exports frequency selector to through second digital phase-locked loop, and frequency selector selects to switch output 10MHz frequency signal to two 10MHz frequency signals of input according to the preferential principle of outside input 10MHz frequency signal of selecting automatically; The GPS timing receiver exports the temporal information and the 1PPS timing signal that receive to the time source selector switch; The time source selector switch is judged temporal information, the 1PPS timing signal of temporal information, 1PPS timing signal and the outside input of the input of GPS timing receiver; Automatically select to switch according to the preferential principle of outside input of selecting, then output time information and 1PPS timing signal.
4. Loran-C timing signal simulator according to claim 1 is characterized in that: said signal imitation unit comprises rowland-C signal imitation module, Eurofix coding module, modulation module, Postponement module, random noise analog module and continuous wave analog module; Textual information is encoded with rowland-C coding rule through the Eurofix coding module, becomes modulation voltage to export modulation module to the data-switching behind the coding; Modulation module carries out the modulation of tri-state impulse displacement word balance according to the modulation voltage of input to standard Loran-C signal waveform, generates Loran-C timing earthwave signal and exports Postponement module to; Postponement module postpones to generate sky wave singal output according to the sky wave parameter of input with Loran-C timing earthwave signal; Rowland-C signal imitation module receives signal parameter, produces standard Loran-C signal with rowland-C number of signals value model and exports modulation module to; The random noise generation module produces random noise and output according to the signal to noise ratio (S/N ratio) and the NF model of input; The continuous wave generation module produces continuous wave and output according to the continuous wave parameter and the numerical model of input.
5. Loran-C timing signal simulator according to claim 1 is characterized in that: the synthetic regulon of said signal comprises D/A converter module, amplitude adjusted module, signal synthesizing module and oval filtration module; D/A converter module converts the Loran-C timing earthwave signal, sky wave singal, random noise and the continuous wave signal that receive to simulating signal and exports the amplitude adjusted module to; The amplitude adjusted module is regulated parameter according to the signal amplitude of input, and the amplitude of every road signal is regulated control, exports signal to signal synthesizing module then; Signal synthesizing module adopts four road power that Loran-C timing earthwave signal, sky wave singal, random noise and continuous wave signal are synthesized coupling, and the oval filtering of process at last is after N type interface output Loran-C timing signal.
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102759884A (en) * | 2012-07-13 | 2012-10-31 | 西安交通大学 | Pulsar frequency signal simulator |
| CN105259411B (en) * | 2015-11-04 | 2018-03-06 | 陕西科技大学 | The method of the underwater propagation characteristic of high-precision forecast Loran-C pulse |
| CN108594279A (en) * | 2018-06-20 | 2018-09-28 | 北京遥测技术研究所 | A kind of device received suitable for multisystem navigation signal monitoring |
| CN108957394A (en) * | 2018-06-26 | 2018-12-07 | 西安理工大学 | A kind of day earthwave delay time estimation method applied to Loran |
| CN109188356A (en) * | 2018-09-30 | 2019-01-11 | 西安理工大学 | A kind of sky wave localization method applied to Loran |
| CN111474564A (en) * | 2020-04-13 | 2020-07-31 | 中国科学院国家授时中心 | Rowland-C navigation signal simulator and method |
| CN111538228A (en) * | 2020-04-13 | 2020-08-14 | 中国科学院国家授时中心 | Low-frequency time code timing signal simulator |
| CN111600619A (en) * | 2020-03-30 | 2020-08-28 | 中山大学 | Rowland C signal generation method, device, equipment and storage medium |
| CN111638640A (en) * | 2020-05-27 | 2020-09-08 | 中国科学院国家授时中心 | BPM shortwave time service signal simulator |
| CN111650610A (en) * | 2020-05-28 | 2020-09-11 | 广东国天时空科技有限公司 | Rowland C comprehensive signal generating equipment |
| CN111726317A (en) * | 2020-05-25 | 2020-09-29 | 中山大学 | Rowland C signal modulation method, device, equipment and storage medium |
| CN111965672A (en) * | 2020-07-24 | 2020-11-20 | 西安理工大学 | Signal processing method based on Rowland-C signal simulator under complex terrain |
| CN112083442A (en) * | 2020-08-31 | 2020-12-15 | 中国科学院国家授时中心 | BPL (Business Process language) long wave data modulation design method based on additional modulation pulse |
| CN112511288A (en) * | 2020-11-29 | 2021-03-16 | 中国科学院国家授时中心 | Device for realizing telephone time service by transmitting voice signal |
| CN113687390A (en) * | 2021-08-20 | 2021-11-23 | 海波 | Rowland C signal generator |
| CN114637180A (en) * | 2022-03-30 | 2022-06-17 | 中国科学院国家授时中心 | Loran-C time service system monitoring devices |
| CN114859691A (en) * | 2022-03-25 | 2022-08-05 | 北京轩宇信息技术有限公司 | Safe isolated wireless unidirectional time service system and method |
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| CN102759884A (en) * | 2012-07-13 | 2012-10-31 | 西安交通大学 | Pulsar frequency signal simulator |
| CN105259411B (en) * | 2015-11-04 | 2018-03-06 | 陕西科技大学 | The method of the underwater propagation characteristic of high-precision forecast Loran-C pulse |
| CN108594279A (en) * | 2018-06-20 | 2018-09-28 | 北京遥测技术研究所 | A kind of device received suitable for multisystem navigation signal monitoring |
| CN108594279B (en) * | 2018-06-20 | 2021-04-13 | 北京遥测技术研究所 | Device suitable for monitoring and receiving multi-system navigation signals |
| CN108957394A (en) * | 2018-06-26 | 2018-12-07 | 西安理工大学 | A kind of day earthwave delay time estimation method applied to Loran |
| CN109188356A (en) * | 2018-09-30 | 2019-01-11 | 西安理工大学 | A kind of sky wave localization method applied to Loran |
| CN111600619A (en) * | 2020-03-30 | 2020-08-28 | 中山大学 | Rowland C signal generation method, device, equipment and storage medium |
| CN111600619B (en) * | 2020-03-30 | 2021-03-12 | 中山大学 | Rowland C signal generation method, device, equipment and storage medium |
| CN111474564A (en) * | 2020-04-13 | 2020-07-31 | 中国科学院国家授时中心 | Rowland-C navigation signal simulator and method |
| CN111538228A (en) * | 2020-04-13 | 2020-08-14 | 中国科学院国家授时中心 | Low-frequency time code timing signal simulator |
| CN111474564B (en) * | 2020-04-13 | 2022-06-07 | 中国科学院国家授时中心 | Rowland-C navigation signal simulator and method |
| CN111538228B (en) * | 2020-04-13 | 2021-06-15 | 中国科学院国家授时中心 | Low-frequency time code timing signal simulator |
| CN111726317A (en) * | 2020-05-25 | 2020-09-29 | 中山大学 | Rowland C signal modulation method, device, equipment and storage medium |
| CN111726317B (en) * | 2020-05-25 | 2021-06-01 | 中山大学 | Rowland C signal modulation method, device, equipment and storage medium |
| CN111638640B (en) * | 2020-05-27 | 2021-07-06 | 中国科学院国家授时中心 | BPM shortwave time service signal simulator |
| CN111638640A (en) * | 2020-05-27 | 2020-09-08 | 中国科学院国家授时中心 | BPM shortwave time service signal simulator |
| CN111650610A (en) * | 2020-05-28 | 2020-09-11 | 广东国天时空科技有限公司 | Rowland C comprehensive signal generating equipment |
| CN111965672A (en) * | 2020-07-24 | 2020-11-20 | 西安理工大学 | Signal processing method based on Rowland-C signal simulator under complex terrain |
| CN111965672B (en) * | 2020-07-24 | 2024-02-02 | 西安理工大学 | Signal processing method of Roland-C signal simulator based on complex terrain |
| CN112083442A (en) * | 2020-08-31 | 2020-12-15 | 中国科学院国家授时中心 | BPL (Business Process language) long wave data modulation design method based on additional modulation pulse |
| CN112511288A (en) * | 2020-11-29 | 2021-03-16 | 中国科学院国家授时中心 | Device for realizing telephone time service by transmitting voice signal |
| CN112511288B (en) * | 2020-11-29 | 2024-05-31 | 中国科学院国家授时中心 | Device for realizing telephone time service by transmitting voice signal |
| CN113687390A (en) * | 2021-08-20 | 2021-11-23 | 海波 | Rowland C signal generator |
| CN114859691A (en) * | 2022-03-25 | 2022-08-05 | 北京轩宇信息技术有限公司 | Safe isolated wireless unidirectional time service system and method |
| CN114859691B (en) * | 2022-03-25 | 2023-12-12 | 北京轩宇信息技术有限公司 | Wireless unidirectional time service system and method with safety isolation |
| CN114637180A (en) * | 2022-03-30 | 2022-06-17 | 中国科学院国家授时中心 | Loran-C time service system monitoring devices |
| CN114637180B (en) * | 2022-03-30 | 2024-04-30 | 中国科学院国家授时中心 | Loran-C time service system monitoring device |
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