CN101937086A - Communication module for satellite navigation system - Google Patents
Communication module for satellite navigation system Download PDFInfo
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- CN101937086A CN101937086A CN 201010245209 CN201010245209A CN101937086A CN 101937086 A CN101937086 A CN 101937086A CN 201010245209 CN201010245209 CN 201010245209 CN 201010245209 A CN201010245209 A CN 201010245209A CN 101937086 A CN101937086 A CN 101937086A
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Abstract
The invention relates to a communication module for a satellite navigation system, which comprises an antenna interface, a low noise amplifier circuit, a power amplifier circuit, a radio frequency circuit and a baseband processing circuit. The low noise amplifier circuit and the power amplifier circuit are connected in parallel and then connected between the antenna interface and the radio frequency circuit; and the radio frequency circuit and the baseband processing circuit are connected with each other. The communication module has the characteristics of high integration level, small volume, low power consumption, and high reliability.
Description
Technical field
The invention belongs to the satellite navigation and the communications field, be specifically related to be used for the communication module group of satellite navigation system.
Background technology
" Big Dipper generation " satellite navigation system is the region satellite navigation system of China's independent development, covers China whole area and surrounding countries, and total system is made up of sky satellite, three parts of ground control station and user application terminal.The user application terminal has functions such as location, navigation and short data communication, in the location, navigation and the communications field have widely and use.
At present, in the main modular that the satellite positioning navigation terminal designing institute is used, GPS module, wireless telecommunications (GPRS/CDMA) module, flush bonding processor Related products such as (as ARM7/ARM9) have the solution of comparative maturity.By contrast and since Big Dipper product for civilian use technology maturity a little less than, most civilian manufacturer terminals are not understood Big Dipper technology.So Big Dipper module often becomes the bottleneck of Terminal Design.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art with not enough, a kind of communication module group that is used for satellite navigation system is provided, this communication module group becomes one low noise amplifier, power amplifier, radio circuit and baseband processing circuitry, have integrated level height, little, low in energy consumption, the high reliability features of volume, and provide the electric interfaces and the DLL (dynamic link library) of standard, be particularly useful for " Big Dipper generation " satellite navigation system, no matter be military or civilian manufacturer terminal, all can release various Big Dippeves application terminal product apace according to this communication module group.
Purpose of the present invention is achieved through the following technical solutions: originally be used for the communication module group of satellite navigation system, comprise antennal interface; Also comprise low noise amplifier circuit, power amplification circuit, radio circuit and baseband processing circuitry; Be connected between antennal interface and the radio circuit after low noise amplifier circuit and the power amplification circuit parallel connection, radio circuit, baseband processing circuitry interconnect.
The described communication module group that is used for satellite navigation system also comprises being used for carrying out power supply and the data-interface that power supply is connected with data with the terminal master control borad; Power supply and data-interface and baseband processing circuitry interconnect.
The described communication module group that is used for satellite navigation system also comprises and described power supply and the interconnective SIM card slot of data-interface.
The described communication module group that is used for satellite navigation system also comprises being used for described communication module group is carried out seal-packed metallic shield outer cover.
Described low noise amplifier circuit comprises first order bandpass filter, low noise amplifier tube, first order amplifier, second level bandpass filter and the second level amplifier that connects successively, and wherein first order bandpass filter is connected with antennal interface.
Described power amplification circuit comprises amplifier, bandpass filter, promotion stage power amplifier, power amplifier tube and the low-pass filter that connects successively, and wherein low-pass filter is connected with antennal interface.
The present invention has following advantage and effect with respect to prior art:
1, integrated low noise amplifier circuit, power amplification circuit, radio circuit and baseband processing circuitry four partial function circuit have been realized two-way orientation and communication and short message communication function to a satellite of the Big Dipper.And the antennal interface that standard is provided is used for external Big Dipper dedicated antenna, and the electric interfaces of standard and DLL (dynamic link library), is connected with the master control borad of terminal manufacturer.
2, two-way orientation and communication and the short message communication function with dipper system realizes by an independently special-purpose module, thereby manufacturer terminal only need finish that hardware connects and location and short message function by the program interface call Big Dipper according to the electric interfaces of standard, greatly reduces the technical threshold of using dipper system.
Description of drawings
Fig. 1 is a hardware block diagram of the present invention;
Fig. 2 has illustrated the structured flowchart of radio circuit;
Fig. 3 is the structural representation of baseband processing circuitry;
Fig. 4 is the low noise amplifier circuit structural drawing;
Fig. 5 is the power amplification circuit structural drawing.
Embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the present invention is used for the communication module of satellite navigation system, and its hardware components mainly comprises: low noise amplifier circuit, and the S-band radiofrequency signal that is used for antenna is received is amplified and filtering; Power amplification circuit is used for radiofrequency signal is amplified to 10W power, launches by antenna then; Radio circuit, radio circuit inner integrated receiving cable and transmission channel, wherein receiving cable has comprised the double conversion structure, major function is to amplify radio-frequency input signals and be down-converted to final 12.24MHz intermediate-freuqncy signal, and then it is sampled, export two A/D signals, the major function of transmission channel is that baseband signal is directly up-converted to radiofrequency signal, exports power amplifier then to; Baseband processing circuitry is used to finish modulation/demodulation function, promptly the A/D signal that receives is separated mediation and modulates transmitting; Antennal interface directly is connected with feeder line with the big-dipper satellite dual-mode antenna; Power supply and data-interface carry out power supply by standard communication interface (can adopt standard communications protocol such as USB, Uart, RS232) with the terminal master control borad and are connected with data, can adopt double 22 needle interfaces of pin apart from 2mm; The SIM card slot inserts special SIM card of the Big Dipper (the SIM card interface is a selectable unit (SU), also can by manufacturer terminal in the terminal deploy); The metallic shield outer cover, be used for communication module group of the present invention is packed, promptly the communication module group that antennal interface, low noise amplifier circuit, power amplification circuit, radio circuit, baseband processing circuitry, power supply and data-interface, SIM card slot are formed packs, and transmits in the communication module group and the mutual electromagnetic of received signal is disturbed and to the electromagnetic interference (EMI) of outside thereby reduced.Be connected between antennal interface and the radio circuit after low noise amplifier circuit and the power amplification circuit parallel connection, radio circuit, baseband processing circuitry, power supply and data-interface interconnect successively, and SIM card slot and power supply and data-interface interconnect.
As shown in Figure 2, radio circuit adopts the double conversion structure at receiving unit, front end is first frequency mixer that is connected with low noise amplifier, and radio-frequency input signals is down-converted to first intermediate-freuqncy signal that frequency is 213MHz by first frequency mixer after low noise amplifier amplifies; First intermediate-freuqncy signal is input in the intermediate-frequency filter, thereby filters image signal and the outer undesired signal of band, enters second frequency mixer through amplifier again; Second frequency mixer becomes second intermediate-freuqncy signal that frequency is 12.24MHz with first intermediate-freuqncy signal.Radiating portion at first converts input code flow to differential analog signal, by adopting three-mixer that baseband signal directly is modulated to the biobelt radiofrequency signal after the low-pass filter filtering, adopts radio frequency attenuator to export power amplifier to adjust radiofrequency signal at last.
The structure of baseband processing circuitry as shown in Figure 3, comprise: embedded ARM chip (being hardware ARM structure), utilize single chip computer architecture, finish the signal modulation/demodulation function, promptly the A/D signal that receives is separated mediation and modulate transmitting by software algorithm; The special-purpose communication module of big-dipper satellite provides the software api interface, and the software of terminal calls by api interface, realizes transmission of Big Dipper short message and locating information function.Api interface mainly comprises: application, locating information, power monitoring application, power monitoring rreturn value, transmission information, reception information are returned, located to SIM card inquiry, SIM card information.
As shown in Figure 4, low noise amplifier circuit mainly comprises first order bandpass filter, low noise amplifier tube, first order amplifier, second level bandpass filter and the second level amplifier that connects successively, and wherein first order bandpass filter is connected with antennal interface; The technical indicator that reaches is: gain G＞40dB, input vswr＜1.5, inband flatness ± 0.5dB, noise figure≤1.6.First order bandpass filter mainly plays the transmitting-receiving buffer action, its differential loss＜0.8, standing wave＜1.5; Second level bandpass filter plays filtering and inhibiting effect.The low noise amplifier tube is used to mate noise figure (≤1.6) and standing wave (＜1.5), is not enough to reach the full gain requirement because low noise amplifier tube one-level is amplified, so will add first and second grades of amplifiers that match.
The structure of power amplification circuit as shown in Figure 5, the technical indicator that this part will reach: gain G＞45dB, 1dB compression point: 40dBm, local oscillator inhibition 〉=30dB.This part comprises amplifier, bandpass filter, promotion stage power amplifier, power amplifier tube and the low-pass filter that connects successively, and wherein low-pass filter is connected with antennal interface.Promoting stage power amplifier makes output power reach 30dBm; Power amplifier tube is amplified to 10W with output signal; Low-pass filter mainly plays the transmitting-receiving buffer action, requires its differential loss about 0.2, standing wave＜1.3.
Workflow of the present invention is as follows:
During reception, the S-band radio signal transmission that antenna receives is to low noise amplifier circuit, low noise amplifier circuit to signal amplify with filtering after signal is transferred to radio circuit, the receiving cable of radio circuit has comprised the double conversion structure, major function is to amplify radio-frequency input signals and be down-converted to final 12.24MHz intermediate-freuqncy signal, and then it is sampled, export two A/D signals to baseband processing circuitry, baseband processing circuitry carries out the synchronous and despreading of spreading code, carrier synchronization and demodulation, frame synchronization, the decoding verification, after calculating data result described data result is transferred to data-interface, call by terminal system.
During emission, baseband processing circuitry is encoded with the instruction and data that data-interface transmits, after spread spectrum and the filtering, produce baseband signal and transfer to radio circuit, radio circuit directly up-converts to radiofrequency signal with baseband signal, export power amplification circuit then to, power amplification circuit is amplified to 10W power with radiofrequency signal, launches by antenna then.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (6)
1. be used for the communication module group of satellite navigation system, comprise antennal interface, it is characterized in that: also comprise low noise amplifier circuit, power amplification circuit, radio circuit and baseband processing circuitry; Be connected between antennal interface and the radio circuit after low noise amplifier circuit and the power amplification circuit parallel connection, radio circuit, baseband processing circuitry interconnect.
2. the communication module group that is used for satellite navigation system according to claim 1 is characterized in that: also comprise being used for carrying out power supply and the data-interface that power supply is connected with data with the terminal master control borad; Power supply and data-interface and baseband processing circuitry interconnect.
3. the communication module group that is used for satellite navigation system according to claim 2 is characterized in that: also comprise and described power supply and the interconnective SIM card slot of data-interface.
4. according to each described communication module group that is used for satellite navigation system among the claim 1-3, it is characterized in that: also comprise being used for described communication module group is carried out seal-packed metallic shield outer cover.
5. according to each described communication module group that is used for satellite navigation system among the claim 1-3, it is characterized in that: described low noise amplifier circuit comprises first order bandpass filter, low noise amplifier tube, first order amplifier, second level bandpass filter and the second level amplifier that connects successively, and wherein first order bandpass filter is connected with antennal interface.
6. the communication module group that is used for satellite navigation system according to claim 1, it is characterized in that: described power amplification circuit comprises amplifier, bandpass filter, promotion stage power amplifier, power amplifier tube and the low-pass filter that connects successively, and wherein low-pass filter is connected with antennal interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010245209 CN101937086A (en) | 2010-08-04 | 2010-08-04 | Communication module for satellite navigation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010245209 CN101937086A (en) | 2010-08-04 | 2010-08-04 | Communication module for satellite navigation system |
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| CN101937086A true CN101937086A (en) | 2011-01-05 |
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| CN 201010245209 Pending CN101937086A (en) | 2010-08-04 | 2010-08-04 | Communication module for satellite navigation system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389504A (en) * | 2013-07-26 | 2013-11-13 | 吴李海 | Beidou/GPS (global positioning system)/WiFi (wireless fidelity)/Bluetooth emergency position-indicating radio beacon and coordinate transmitting device |
| CN104125603A (en) * | 2013-04-24 | 2014-10-29 | 中国移动通信集团公司 | Method, apparatus and system for base station to transmit instruction message to communication terminal |
| CN105515641A (en) * | 2016-01-05 | 2016-04-20 | 成都九洲电子信息系统股份有限公司 | Big data transmission system based on big dipper first generation communication system |
| CN106953679A (en) * | 2016-01-06 | 2017-07-14 | 北京九天利建信息技术股份有限公司 | A kind of vehicle-mounted Big Dipper short message satellite-signal communicator |
| CN107370514A (en) * | 2017-07-27 | 2017-11-21 | 中国电子科技集团公司第五十四研究所 | Large Copacity information transceiving device and receiving/transmission method based on a Big Dipper generation |
| CN109889301A (en) * | 2019-03-11 | 2019-06-14 | 武汉虹信通信技术有限责任公司 | The shielding device and its screen method of 5G green wireless signal |
| CN110429971A (en) * | 2019-07-31 | 2019-11-08 | 湖北三江航天险峰电子信息有限公司 | A kind of miniaturization satellite communication mould group |
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| CN2588668Y (en) * | 2002-12-17 | 2003-11-26 | 南京才华科技有限公司 | RF receiving and transmitting device |
| CN201804114U (en) * | 2010-08-04 | 2011-04-20 | 广州广嘉北斗电子科技有限公司佛山市南海分公司 | Communication module for satellite navigation system |
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2010
- 2010-08-04 CN CN 201010245209 patent/CN101937086A/en active Pending
Patent Citations (2)
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| CN2588668Y (en) * | 2002-12-17 | 2003-11-26 | 南京才华科技有限公司 | RF receiving and transmitting device |
| CN201804114U (en) * | 2010-08-04 | 2011-04-20 | 广州广嘉北斗电子科技有限公司佛山市南海分公司 | Communication module for satellite navigation system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104125603A (en) * | 2013-04-24 | 2014-10-29 | 中国移动通信集团公司 | Method, apparatus and system for base station to transmit instruction message to communication terminal |
| CN104125603B (en) * | 2013-04-24 | 2017-09-15 | 中国移动通信集团公司 | A kind of base station sends method, equipment and the system for indicating message to communication terminal |
| CN103389504A (en) * | 2013-07-26 | 2013-11-13 | 吴李海 | Beidou/GPS (global positioning system)/WiFi (wireless fidelity)/Bluetooth emergency position-indicating radio beacon and coordinate transmitting device |
| CN105515641A (en) * | 2016-01-05 | 2016-04-20 | 成都九洲电子信息系统股份有限公司 | Big data transmission system based on big dipper first generation communication system |
| CN105515641B (en) * | 2016-01-05 | 2018-11-20 | 成都九洲电子信息系统股份有限公司 | Big data Transmission system based on Beidou generation communication system |
| CN106953679A (en) * | 2016-01-06 | 2017-07-14 | 北京九天利建信息技术股份有限公司 | A kind of vehicle-mounted Big Dipper short message satellite-signal communicator |
| CN107370514A (en) * | 2017-07-27 | 2017-11-21 | 中国电子科技集团公司第五十四研究所 | Large Copacity information transceiving device and receiving/transmission method based on a Big Dipper generation |
| CN109889301A (en) * | 2019-03-11 | 2019-06-14 | 武汉虹信通信技术有限责任公司 | The shielding device and its screen method of 5G green wireless signal |
| CN109889301B (en) * | 2019-03-11 | 2021-09-14 | 武汉虹旭信息技术有限责任公司 | Shielding device and shielding method for 5G green wireless signals |
| CN110429971A (en) * | 2019-07-31 | 2019-11-08 | 湖北三江航天险峰电子信息有限公司 | A kind of miniaturization satellite communication mould group |
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Application publication date: 20110105 |