CN202798695U - Radio station frequency hopping synchronous control device based on Beidou satellite timing system - Google Patents
Radio station frequency hopping synchronous control device based on Beidou satellite timing system Download PDFInfo
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- CN202798695U CN202798695U CN 201220444927 CN201220444927U CN202798695U CN 202798695 U CN202798695 U CN 202798695U CN 201220444927 CN201220444927 CN 201220444927 CN 201220444927 U CN201220444927 U CN 201220444927U CN 202798695 U CN202798695 U CN 202798695U
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Abstract
The utility model discloses a radio station frequency hopping synchronous control device based on a Beidou satellite timing system and relates to a synchronization technology in a frequency-hopping communication technology and a satellite timing technology in a satellite navigation technology in the field of military communications. The device comprises an analog to digital (A/D) converter, an intermediate frequency digital signal processing unit, a frequency hopping command generator, a direct digital synthesizer (DDS), a Beidou satellite radio frequency module and a data processing unit. By means of a one-way timing method of a Beidou navigation system, an accurate and reliable clock is provided for a receiver and a sender of a radio station, and the clock is used as a time reference to achieve synchronization of frequency hopping patterns of the receiver and the sender. The radio station frequency hopping synchronous control device has the advantages of being simple in achievement, long in synchronization retention time and suitable for frequency hopping synchronous control of the radio station under the condition that a center base station is absent.
Description
Technical field
The utility model relates to the frequency hopping sync control device of Tactical Radio Set, is applicable in the situation without center base station, and for military frequency hopping wireless radio station provides fast, stable Synchronization Control is used.
Background technology
The frequency hopping in military tactical radio station all has a very big significance for secure communication and electronic countermeasures, but the simultaneous techniques of frequency hopping has but restricted the development of this technology.Present frequency hopping radio set self-synchronizing method commonly used, prefix has taken frequency resource with footwork etc. more, but also can cause the contradiction between frequency hopping pattern cycle and the frequency hopping frequency number, thus so that the design difficult of overall plan.Utilize the reference clock method to reach the then comparatively simple synchronously of frequency hopping, but but need center base station to issue network-wide reference clock, thereby greatly reduce the survivability of frequency hopping communications networks.
The utility model content
The purpose of this utility model is to avoid the weak point in the above-mentioned background technology, and provides a kind of realization simple, comparatively reliably the frequency hopping synchronizer.Basic skills of the present utility model is to utilize the time service of big-dipper satellite space-based, and the reference clock method provides synchronised clock for the whole network radio station.Because what the utility model adopted is big-dipper satellite one-way timing mode, utilize Big Dipper time dissemination system for the whole network provide one high-precision, reference clock source realizes that frequency hopping is synchronous reliably.The advantages such as the utility model also has good concealment, and initial synchronization time and the lock in time that networks late are short, and time to lose lock is long, and is synchronously reliable.
The purpose of this utility model is achieved in that
A kind of radio station's frequency hopping sync control device based on the big-dipper satellite time dissemination system comprises A/D2, digital intermediate frequency signal processing unit 3, frequency hopping command generator 5 and DDS 6, it is characterized in that: also comprise big-dipper satellite radio-frequency module 1 and data processing unit 4; Described big-dipper satellite radio-frequency module 1 receives the wireless signal that big-dipper satellite is sent, and is converted into the analog intermediate frequency signal of 0dbm, passes to A/D2, to become digital signal; Despreading, solution that digital intermediate frequency signal processing unit 3 will carry out from the digital medium-frequency signal that A/D2 sends the satellite beams signal are in harmonious proportion synchronously, and with the demodulating data that obtains and the frame synchronizing signal of satellite down-transmitting data, send data processing unit 4 to by address bus and data/address bus; The demodulating data that data processing unit 4 provides according to digital intermediate frequency signal processing unit 3, finish the Viterbi decoding of satellite-signal, verification and data assembly unit, the smothing filtering of Calculation of Satellite orbital data and optimal estimation, and further calculate the ionosphere corrections of electric wave, time-delay and the doppler correction of electric wave, and the TOD temporal information is exported to frequency hopping command generator 5 the most at last; Frequency hopping command generator 5 is according to digital processing element) signal fiducial time that provides, in conjunction with local coordinate system, according to the spheres intersect algorithm, calculate standard time information (TOD), and take TOD as the basis, provide precision less than the 1PPS (pps pulse per second signal) of 100ns, then these clock signals are exported to the frequency hopping command generator 5 in radio station, as standard clock signal; Frequency hopping command generator 5 produces the frequency hopping instruction take these standard clock signals as the basis, and DDS (Direct Digital Frequency Synthesizers) is controlled.
Wherein, described big-dipper satellite radio-frequency module 1 comprises that first order LNA 7-1, second level LNA 7-2, dielectric filter 8, frequency mixer 9, first order intermediate frequency amplifier 10-1, second level intermediate frequency amplify 10-2, first order LC filter 11-1, second level LC filter 11-2, local clock 12, frequency synthesizer 13 and AGC 14; After first order LNA 7-1 amplified the big-dipper satellite radiofrequency signal of the 2491.75MHz of reception, through dielectric filter 8 filtering, recycling second level LNA 7-2 carried out the second time and amplifies; Local clock 12 obtains the signal of 70.15MHz through frequency synthesizer 13 simultaneously, then with the signal of second level LNA 7-2 output and the output signal of frequency synthesizer 13, utilize frequency mixer 9 to carry out mixing, signal after the mixing is after passing through successively first order intermediate frequency amplifier 10-1, first order LC filter 11-1, second level intermediate frequency amplifier 10-2 and second level LC filter 11-2 amplification filtering, obtain the intermediate-freuqncy signal of 70.15MHz, it is stable to 0dbm with signal gain to deliver to AGC 14 again, delivers to A/D2.
Wherein, described data processing unit 4 comprise data cache module 15, decoding computing module 16, local coordinate system information-storing device 17, the time base calculate 18 and phase detecting module 19; The described data cache module 15 therefrom data that transmit of frequency word signal processing unit 3 is carried out buffer memory, then pay decoding, verification and the assembly unit of decoding computing module 16 to finish Big Dipper satellite signal, then the local coordinate system information that provides in conjunction with local coordinate system information-storing device 17, base information when the time spent, base computing module 18 calculated; In addition, the data of data cache module 15 also need to offer phase detecting module 19, then the phase information of detection and the result of Shi Ji calculating are offered regularly synthesis module 20, to finish timing signal output.
The utility model is compared background technology and is had following advantage:
1. the satellite time transfer that adopts of the utility model comes from the Beidou satellite system that China has complete independent intellectual property right, and is safe in the gps system of American side;
2. the passive one-way timing of the utility model employing need not to send information to big-dipper satellite and Big Dipper ground station, therefore has good disguise;
3. the utility model utilizes the big-dipper satellite time service, for networking frequency hopping tactical radio set provides unified, disjunction mark is accurate during high accuracy, when carrying out Synchronization Control, need not to send between the radio station synchronous prefix, also need not additionally to open up between the radio station frequency and send synchronizing signal, therefore increased the utilance of channel, also reduced the design difficulty in radio station;
4. the utility model utilizes satellite time transfer, and for the radio station provides the high accuracy time-base signal, so that radio station initial synchronization time and the lock in time that networks late are short, time to lose lock is long, and is reliable synchronously;
Description of drawings
Fig. 1 is the electric functional-block diagram of the utility model embodiment.
Fig. 2 is the electric functional-block diagram of the utility model radio-frequency module.
Fig. 3 is the electric functional-block diagram of the utility model data processing module.
Embodiment
Referring to figs. 1 through Fig. 3, the utility model comprises big-dipper satellite radio-frequency module 1, Digital IF Processing module 3, and data processing unit 4, frequency hopping command generator 5, as shown in Figure 1.Fig. 1 is the electric functional-block diagram that the utility model is implemented.Wherein radio-frequency module 1 is that the broadcast singal of big-dipper satellite issue is intercepted and captured, and after it is downconverted to intermediate frequency, convert analog if signal to digital medium-frequency signal by A/D 2, offer digital intermediate frequency signal processing unit 3, to carry out preliminary demodulation, extract the basic frame data of satellite broadcasting.Then these frame data can send data processing unit 4 to by number bus, finish the decoding of satellite broadcasting data, verification by this unit, the data assembly unit, and further finishing the electric wave time-delay calculation, Doppler such as revises at calculating and outputting standard temporal information and the high-precision pps pulse per second signal.Radio-frequency module 1 in the example is comprised of discrete component, and the CycloneII type FPGA that digital intermediate frequency signal processing unit 3 adopts U.S. altera corps to produce makes, and data processing unit 4 adopts the SB3500 of Chinese Wuxi De Sipu company to make.
Described big-dipper satellite radio-frequency module comprises that first order LNA 7-1, second level LNA 7-2, dielectric filter 8, frequency mixer 9, first order intermediate frequency amplifier 10-1, second level intermediate frequency amplify 10-2, first order LC filter 11-1, second level LC filter 11-2, local clock 12, frequency synthesizer 13 and AGC 14, as shown in Figure 2.Fig. 2 is the electric functional-block diagram of the utility model radio-frequency module.The module input mouth is Big Dipper time service antenna, after the big-dipper satellite radiofrequency signal of 2491.75MHz is done to amplify by first order LNA 7-1, after dielectric filter 8 filtering, again utilizes second level LNA 7-2 to amplify.Local clock 12 process frequency synthesizers 13 obtain the signal of 70.15MHz simultaneously, then with the signal of second level LNA 7-2 output and the output signal of frequency synthesizer 13, utilize frequency mixer 9 to carry out mixing.Signal after the mixing is at process first order intermediate frequency amplifier 10-1, first order LC band pass filter 11-1, second level intermediate frequency amplifier 10-2, after twice amplification filtering of second level LC band pass filter 11-2, obtain the intermediate-freuqncy signal of 70.15MHz, deliver to again AGC 14, signal gain is stable to 0dbm, deliver to A/D 2.First order LNA 7-1 and second level LNA 7-2 are MGA8563 in the example, dielectric filter 8 is DFC2491K series, frequency mixer 9 adopts 2682 of Maxim company, that first order intermediate frequency amplifier 10-1 and second level intermediate frequency amplify the 10-2 employing is the AD8354 of AD company, that frequency synthesizer 13 adopts is the AD4360 of AD company, and AGC14 then is comprised of variable gain amplifier AD8369 and differential amplifier AD8132.
A/D 2 exports to digital intermediate frequency signal processing unit 3, and utilizes software to finish the demodulation of satellite velocity of wave signal by digital intermediate frequency signal processing unit 3.The data communication device with after the demodulation of digital intermediate frequency signal processing unit 3 is crossed bus output digital processing element 4.Described digital processing element 4 can be according to the algorithm of necessity, finish the decoding of Big Dipper satellite signal, verification, assembly unit, and calculate standard time information (TOD) further combined with local coordinate system, and provide precision less than the 1PPS (pps pulse per second signal) of 100ns, and then these clock signals are exported to the frequency hopping command generator 5 in radio station, for it DDS (Direct Digital Frequency Synthesizers) is controlled.
The concise and to the point operation principle of the utility model is as follows:
Big-dipper satellite radio-frequency module 1 receives the broadcast data of big-dipper satellite, through first order LNA 7-1, dielectric filter 8, after second level LNA 7-2 two stage filter amplifies, after downconverting to the 70.15MHzz intermediate frequency, amplify 10-2 by first order intermediate frequency amplifier 10-1 and second level intermediate frequency again, after first order LC filter 11-1 and second level LC filter 11-2 shaping are amplified, after by AGC 14 signal gain being stabilized in 0dbm, after carrying out demodulation by 3 pairs of signals of digital intermediate frequency signal processing unit, recycling efficient data processing unit 4 calculates standard time information and high accuracy pps pulse per second signal, offer frequency hopping command generator 5, carry out the frequency hopping Synchronization Control.
Claims (3)
1. radio station's frequency hopping sync control device based on the big-dipper satellite time dissemination system, comprise A/D (2), digital intermediate frequency signal processing unit (3), frequency hopping command generator (5) and DDS (6), it is characterized in that: also comprise big-dipper satellite radio-frequency module (1) and data processing unit (4); Described big-dipper satellite radio-frequency module (1) receives the wireless signal that big-dipper satellite is sent, and is converted into the analog intermediate frequency signal of 0dbm, passes to A/D (2), to become digital signal; Despreading, solution that digital intermediate frequency signal processing unit (3) will carry out from the digital medium-frequency signal that send A/D (2) the satellite beams signal are in harmonious proportion synchronously, and with the demodulating data that obtains and the frame synchronizing signal of satellite down-transmitting data, send data processing unit (4) to by address bus and data/address bus; The demodulating data that data processing unit (4) provides according to digital intermediate frequency signal processing unit (3), finish the Viterbi decoding of satellite-signal, verification and data assembly unit, the smothing filtering of Calculation of Satellite orbital data and optimal estimation, and further calculate the ionosphere corrections of electric wave, time-delay and the doppler correction of electric wave, and the TOD temporal information is exported to frequency hopping command generator (5) the most at last; Signal fiducial time that frequency hopping command generator (5) provides according to data processing unit (4), in conjunction with local coordinate system, according to the spheres intersect algorithm, calculate standard time information, and take this standard time information as the basis, provide precision less than the pps pulse per second signal of 100ns, then these clock informations are exported to the frequency hopping command generator (5) in radio station, as standard clock signal; Frequency hopping command generator (5) produces the frequency hopping instruction take these standard clock signals as the basis, and DDS is controlled.
2. the radio station's frequency hopping sync control device based on the big-dipper satellite time dissemination system according to claim 1, it is characterized in that: described big-dipper satellite radio-frequency module (1) comprises first order LNA (7-1), second level LNA (7-2), dielectric filter (8), frequency mixer (9), first order intermediate frequency amplifier (10-1), second level intermediate frequency amplifier (10-2), first order LC filter (11-1), second level LC band filter (11-2), local clock (12), frequency synthesizer (13) and AGC (14); After first order LNA (7-1) was amplified the big-dipper satellite radiofrequency signal of the 2491.75MHz of reception, through dielectric filter (8) filtering, recycling second level LNA (7-2) was carried out the second time and is amplified; Local clock (12) obtains the signal of 70.15MHz through frequency synthesizer (13) simultaneously, then with the signal of second level LNA (7-2) output and the output signal of frequency synthesizer (13), utilize frequency mixer (9) to carry out mixing, signal after the mixing is passing through first order intermediate frequency amplifier (10-1) successively, first order LC filter (11-1), after second level intermediate frequency amplifier (10-2) and second level LC filter (11-2) amplification filtering, obtain the intermediate-freuqncy signal of 70.15MHz, it is stable to 0dbm with signal gain to deliver to AGC (14) again, delivers to A/D (2);
3. the radio station's frequency hopping sync control device based on the big-dipper satellite time dissemination system according to claim 1 and 2 is characterized in that: described data processing unit (4) comprise data cache module (15), decoding computing module (16), local coordinate system information-storing device (17), the time base computing module (18) and phase detecting module (19); Described data cache module (15) will be therefrom the data that transmit of frequency word signal processing unit (3) carry out buffer memory, then pay decoding, verification and the assembly unit of decoding computing module (16) to finish Big Dipper satellite signal, then the local coordinate system information that provides in conjunction with local coordinate system information-storing device (17), time spent base computing module (18) is base information when calculating; In addition, the data of data cache module (15) also need to offer phase detecting module (19), then the phase information of detection and the result of Shi Ji calculating are offered regularly synthesis module (20), to finish timing signal output.
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Cited By (8)
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| CN103391114A (en) * | 2013-07-29 | 2013-11-13 | 大连大学 | Fast capture method of frequency hopping communication during satellite communication |
| CN104052524A (en) * | 2014-07-03 | 2014-09-17 | 中国人民解放军国防科学技术大学 | GPS-assisted fast frequency hopping synchronization method |
| CN104244401A (en) * | 2014-10-16 | 2014-12-24 | 成都微址科技有限公司 | Satellite timing service-based wireless communication method and satellite timing service-based wireless communication device |
| CN106559103A (en) * | 2016-12-08 | 2017-04-05 | 西安烽火电子科技有限责任公司 | A kind of extensive hopped-frequency pulses system based on Big Dipper time service |
| CN109120331A (en) * | 2018-09-18 | 2019-01-01 | 福建鼎旸信息科技股份有限公司 | General Aviation satellite and wireless fusion earth-space communication command system and method |
| CN111866754A (en) * | 2020-06-29 | 2020-10-30 | 湖南省时空基准科技有限公司 | Wireless broadcast time service information processing method |
| CN114726432A (en) * | 2022-03-15 | 2022-07-08 | 中国人民解放军国防科技大学 | Intelligent clock control and management method for space-based intelligent networking |
| CN116582164A (en) * | 2023-07-07 | 2023-08-11 | 四川九洲空管科技有限责任公司 | Multimode ground aviation communication radio station |
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- 2012-09-04 CN CN 201220444927 patent/CN202798695U/en not_active Expired - Fee Related
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| CN103391114B (en) * | 2013-07-29 | 2015-08-12 | 大连大学 | The quick capturing method of frequency hopping communications in a kind of satellite communication |
| CN103391114A (en) * | 2013-07-29 | 2013-11-13 | 大连大学 | Fast capture method of frequency hopping communication during satellite communication |
| CN104052524A (en) * | 2014-07-03 | 2014-09-17 | 中国人民解放军国防科学技术大学 | GPS-assisted fast frequency hopping synchronization method |
| CN104244401A (en) * | 2014-10-16 | 2014-12-24 | 成都微址科技有限公司 | Satellite timing service-based wireless communication method and satellite timing service-based wireless communication device |
| CN104244401B (en) * | 2014-10-16 | 2016-03-30 | 成都微址科技有限公司 | A kind of wireless communications method based on satellite time transfer and device |
| CN106559103B (en) * | 2016-12-08 | 2019-03-29 | 西安烽火电子科技有限责任公司 | A kind of extensive hopped-frequency pulses system based on Beidou time service |
| CN106559103A (en) * | 2016-12-08 | 2017-04-05 | 西安烽火电子科技有限责任公司 | A kind of extensive hopped-frequency pulses system based on Big Dipper time service |
| CN109120331A (en) * | 2018-09-18 | 2019-01-01 | 福建鼎旸信息科技股份有限公司 | General Aviation satellite and wireless fusion earth-space communication command system and method |
| CN109120331B (en) * | 2018-09-18 | 2022-03-25 | 福建鼎旸信息科技股份有限公司 | General aviation satellite and wireless fusion ground-air communication command system and method |
| CN111866754A (en) * | 2020-06-29 | 2020-10-30 | 湖南省时空基准科技有限公司 | Wireless broadcast time service information processing method |
| CN111866754B (en) * | 2020-06-29 | 2021-09-21 | 湖南省时空基准科技有限公司 | Wireless broadcast time service information processing method |
| CN114726432A (en) * | 2022-03-15 | 2022-07-08 | 中国人民解放军国防科技大学 | Intelligent clock control and management method for space-based intelligent networking |
| CN114726432B (en) * | 2022-03-15 | 2024-02-02 | 中国人民解放军国防科技大学 | Intelligent clock control and management method for space-based intelligent network |
| CN116582164A (en) * | 2023-07-07 | 2023-08-11 | 四川九洲空管科技有限责任公司 | Multimode ground aviation communication radio station |
| CN116582164B (en) * | 2023-07-07 | 2023-10-20 | 四川九洲空管科技有限责任公司 | Multimode ground aviation communication radio station |
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