CN201388192Y - Big Dipper multi-mode time service receiving device - Google Patents
Big Dipper multi-mode time service receiving device Download PDFInfo
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- CN201388192Y CN201388192Y CN200920101921U CN200920101921U CN201388192Y CN 201388192 Y CN201388192 Y CN 201388192Y CN 200920101921 U CN200920101921 U CN 200920101921U CN 200920101921 U CN200920101921 U CN 200920101921U CN 201388192 Y CN201388192 Y CN 201388192Y
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Abstract
A Big Dipper multi-mode time service receiving device consists of a broad band time service active antenna and a multi-mode radio frequency receiver module. The technical scheme does not need to arrange a plurality of special frequency range time service antennas according to a navigational satellite and a frequency range; and the radio frequency receiver module does not adopt time division multiplexing technology to switch the local frequency and intermediate frequency filtering frequency points frequently, and does not adopt a tunable mode to switch frequency range and multi-channel demodulation mode, but utilizes software technology to control a programmable intermediate frequency filter to automatically select active standby time service signals by a storage control processor, thus being capable of ensuring the transmission and demodulation quality. In the utility model, as the time service active antenna and the radio frequency receiver module are conducted integrated design, the provided newest circuit design and structure not only improves the flexibility and reliability of the switching of the multi-mode time service, but also is extremely beneficial to reducing the reformation cost of converting the existing CDMA and TD-SCDMA mobile communication base station from the single-mode time service to the multi-mode time service.
Description
Technical field
The utility model relates to a kind of satellite positioning navigation multi-mode time service receiving device, and it is synchronous to be specially adapted to mobile communication apparatus station time services such as CDMA, CDMA2000, TD-SCDMA, belongs to mobile communication and satellite positioning navigation field.
Background technology
CDMA especially in Modern Mobile Communications Systems, in CDMA2000 and the TD-SCDMA mobile communication system, require the wave point of whole cellular system all to be synchronized with same etalon time, generally Position Fixing Navigation System or wire cable provide this etalon time via satellite, because NAVSTAR time service accuracy height, time delay is little, therefore many employing satellites time service in these mobile communications devices, but, foundation along with a plurality of international satellite navigation system, except that the GPS of USA satellite navigation system, other Galileo as European Union, in " two generations of the Big Dipper " that Muscovite GLONASS and China will soon set up, are the global location navigation system (COMPASS-M1), all incite somebody to action or entered practical stage, therefore require the satellite positioning navigation or the time service service receiver of a new generation, should be able to the simultaneously compatible and different satellite navigation time signals of reception, for the user provides more stable, reliably, it is inevitable that accurate service, multisystem compatible receiver replace the triangular web receiver to become.But, the enterprise that present domestic most designs and production base station produce the radio-frequency transmitter chip with time-service active antenna and design is respectively independently, the special China that works as encourages exploitation based on the Big Dipper two generations satellite navigation system, when having multisystem compatible type time service radio-frequency transmitter simultaneously, just should take the method for time-service active antenna and radio-frequency transmitter integrated design, select best multimode to receive design." a kind of double-mode time service active antenna " patent of the previous application of applicant owing to the radio-frequency transmitter Module Design is not considered as a whole interior, therefore is difficult to realize applicant's technical goal.For further improving the reliability and the manufacturability of satellite time service, guarantee that domestic CDMA and TD-SCDMA mobile communication system carry out the Big Dipper two generations time service conversion and transform under the situation of normal operation, reduction system conversion cost, just be necessary time-service active antenna and radio-frequency transmitter module are planned as a whole design, adopt the technology path of simplifying most, realize that above-mentioned multimode receives and compatible target.
Summary of the invention
Problem to be solved in the utility model is to plan as a whole to design with the Big Dipper two on behalf of the master, multisystem compatible type time-service active antenna and radio-frequency transmitter module, adopt radio frequency to receive the integrated design scheme, guarantee that existing mobile communication base station can receive different satellite navigation time signals simultaneously, strive breaking away from dependence, improve fail safe, reliability and the independence of China's mobile communication system network single satellite navigation system.
The utility model big dipper multi-mode time service receiving device is by the broadband time-service active antenna, the multi-mode radio frequency receiver module is formed, it is characterized in that: described broadband time-service active antenna is by broadband ceramic dielectric reception antenna, preposition band pass filter, the low noise field-effect amplifier, broadband band-pass filter, the monolithic low noise amplifier, anti-lightning strike surge impact circuit, the power supply voltage stabilizing circuit, contain the two-sided printing copper-clad plate of microstrip circuit, N type needle electric coupler is formed, this time-service active antenna is inventor's patent 200520023991.1,200620024687.3 and 200720304839,200820228116.0,200820228123.0 the application in this patent also is to form through improvement as technology platform.
Described multi-mode radio frequency receiver module is by the multimode narrow band filter, frequency mixer, the comprehensive generator of shared frequency, the intermediate frequency integrated filter, the AGC automatic gain amplifier, A/D analog to digital converter and access control processor, network interface, the multimode signal selector, signal level detecter, wideband low noise amplifier, intermediate-frequency filter able to programme, compositions such as digital demodulator, it is characterized in that: described multi-mode radio frequency receiver module adopts the method for integrated circuit to be produced on one or two chip, wherein, frequency mixer, comprehensive frequency generator, the intermediate frequency integrated filter, the AGC automatic gain amplifier, the A/D analog to digital converter is integrated on the chip, access control processor is integrated on another chip, or all is integrated on the chip; Or frequency mixer, comprehensive frequency generator be integrated on the chip, intermediate frequency integrated filter, AGC automatic gain amplifier, A/D analog to digital converter, access control processor are integrated on another chip; Or frequency mixer, comprehensive frequency generator, multimode signal selector, signal level monitor, LNA wideband low noise amplifier, A/D analog to digital converter be integrated on the chip, intermediate-frequency filter able to programme, digital demodulator, access control processor are integrated on another chip; The multi-mode radio frequency receiver module is installed and is mounted on one and covers on the copper printed circuit board.
Above-mentioned ceramic medium antenna is a broad-band reception antenna, can accept " two generations of the Big Dipper " and GPS, Galileo simultaneously, or GLONASS satellite time service carrier signal, be primarily characterized in that: the receive frequency of this ceramic medium antenna is respectively the 1561.098MHz in " two generations of the Big Dipper " and the 1575.42MHz of GPS, Galileo; Or extend to the 1602.56MHz of GLONASS; This ceramic medium antenna is arranged at the one side of covering the copper printed board, and is connected to preposition band pass filter input by lead-in wire.
Above-mentioned broadband band-pass filter adopts Ceramic Dielectric Filter part or SAW (Surface Acoustic Wave) device, and the frequency response bandwidth is 1550 to 1580MHz, or to 1620MHz; Or adopt staggered tuning band pass filter, wherein f
01Be the 1561.098MHz in " two generations of the Big Dipper ", f
02Be the 1575.42MHz of GPS and Galileo, f
031602.56MHz bandwidth 10MHz for GLONASS.
Above-mentioned narrow band filter is provided with respectively, adopts Ceramic Dielectric Filter part or SAW (Surface Acoustic Wave) device, and centre frequency is respectively 1561.098MHz and 1575.42MHz, and bandwidth is 4.092MHz; Or the 1602.56MHz of GLONASS, bandwidth 10MHz.
Described broadband time-service active antenna important technological parameters is as follows:
(1) frequency range [MHz]: 1550-1580; Or extend to 1620
(2) gain [dBi]:＞20
(3) noise factor [dB]:＜2.5@+25 ℃,＜3.0@+80 ℃
(4) outer [dB]: the fo=1570MHz that suppresses of band; Or fo=1585MHz
fo±30MHz ＞5
fo±50MHz ＞20
fo±100MHz ＞50
(5) input and output voltage standing-wave ratio :≤2.0
(6) anti-surge (impact) immunity to interference performance meets
GB/T17626.5-1999idt IEC 61000-4-5:1995 standard
Surge waveform: CWG composite wave, 1.2/50 μ s, 8/20 μ s
Voltage peak [V]: 〉=2000
Number of pulses: 10
(7) signal time delay is less than 5ns.
Above-mentioned preposition band pass filter, low noise field-effect amplifier, broadband band-pass filter, one chip amplifier and anti-lightning strike surge impact circuit and power supply voltage stabilizing circuit are positioned at the another side of printed board; Above circuit shields fully and splits in two metallic enclosures, and preposition band pass filter and low noise field-effect amplifier place in the metallic enclosure, and remaining circuit places in another shielding cavity.
The electric principle of above-mentioned broadband time-service active antenna and multi-mode radio frequency receiver module is: the broadband time-service active antenna receives simultaneously from " two generations of the Big Dipper " and GPS, Galileo satellite time service carrier signal, behind low noise amplification and broadband filter, via lightning arrester, coaxial cable transfers to the multi-mode radio frequency receiver module, broadband high-frequency signals is respectively through two narrow band filter filtering, produce centre frequency and be respectively 1561.098MHz and 1575.42MHz, the frequency response bandwidth is two groups of high frequency analog signals of 4.092MHz, enter frequency mixer separately then respectively, carry out the down-conversion mixing with the local frequency that comprehensive frequency generator produces, produce two centre frequency differences but the identical analog intermediate frequency signal of bandwidth through mixing, because the bandwidth of GPS time signal is 2.046MHz, Galileo is 4.092MHz, therefore the wherein one group of intermediate-freuqncy signal after down-conversion is comprising the time service information of GPS and two groups of satellites of Galileo simultaneously, but spread spectrum code check difference, another group then is the Big Dipper two a generations intermediate-freuqncy signal, bandwidth is 4.092MHz, two groups of intermediate-freuqncy signals enter the intermediate frequency integrated filter simultaneously, the intermediate frequency integrated filter is under the control of access control processor, automatically giving tacit consent to one of them satellite time service intermediate-freuqncy signal according to centre frequency of setting and band bandwidth is main signal, other is a space signal, perhaps while cut-in stand-by signal oscillator disturbs frequently to reduce self produce adjacent; Enter the AGC automatic gain amplifier through filtered intermediate-freuqncy signal, entering A/D analog-digital demodulation device then finishes analog-to-digital conversion and conciliates spread spectrum and resolve, digit time signal after access control processor will resolve passes through network interface, according to and base station time synchronized machine between communication protocol and technical specification transmission time synchronizing signal, guarantee that mobile communication system is synchronized with a fiducial time.
Above-mentioned intermediate frequency integrated filter also can adopt discrete devices such as Ceramic Dielectric Filter or surface acoustic wave to be provided with outward, and its centre frequency depends on the selection of local frequency, is arranged on 1 to 30MHz; The intermediate-frequency bandwidth of GPS is 2.046MHz; The intermediate-frequency bandwidth of two generations of the Big Dipper and Galileo is 4.092MHz, and GLONASS intermediate-frequency bandwidth is 10MHz.
Another kind of technical scheme is to adopt the software engineering demodulation.For containing existing four kinds of satellite navigation system time service carrier signals, the broadband time-service active antenna can be received bandwidth and be extended to 1620MHz, in the multi-mode radio frequency receiver module, increase the GLONASS narrow band filter, its centre frequency is 1602.56MHz, bandwidth 10MHz; Or a multimode signal selector was set before frequency mixer, and the major function of this selector is that the high-frequency signal incoming level to the input radio frequency receiver detects and compares, signal is strong to select, pulse code distortion smaller is as the time service main signal; The multimode signal selector is responsible for monitoring by the signal level detecter that independently is provided with or is arranged in the access control processor, corresponding is that intermediate frequency integrated filter able to programme is made corresponding intermediate frequency filtering frequency and frequency band change action according to the control command of signal level detecter or access control processor simultaneously, to guarantee the accurate demodulation of digital demodulator; Frequency mixer can be provided with one, or the mode by synchronous switching local frequency prevents to produce and adjacently disturbs frequently, wideband low noise amplifier, A/D analog to digital converter are arranged on after the frequency mixer, to guarantee intermediate frequency digital filter needed number intermediate-freuqncy signal able to programme and gain amplifier.
Different is for the utility model and existing multimode radio-frequency demodulation techniques, and this technical scheme does not need according to navigation satellite and frequency range several special-purpose frequency range time service antennas to be set, and the present invention only adopts a broadband time-service active antenna; The radio-frequency transmitter module does not adopt time-division multiplex technology frequently to switch local frequency and intermediate frequency filtering frequency, do not adopt tunable mode to switch frequency range yet, but adopt the multi-channel rf demodulation or utilize software engineering to select the active and standby time signal of using automatically by access control processor and the intermediate frequency integrated filter that maybe can write able to programme, for preventing that local oscillator from producing adjacent interference frequently, access control processor can also be controlled and the cut-in stand-by signal oscillator, or close standby time signal by the multimode signal selector, therefore time pulse can not conciliate because of transmission and be readjusted the distribution living mutation, can guarantee to transmit demodulation quality.Because the present invention has carried out integrated design to time-service active antenna and radio-frequency transmitter module, up-to-date circuit design that provides and structure have made full use of existing chip integrated technology and software radio-frequency technique, not only improved flexibility, the reliability of multimode time service conversion, and very helped reducing cost.Particularly operating CDMA of China and TD-SCDMA mobile communication system, when being converted to the multimode time service by the time service of GPS single mode, only need to change the time-service active antenna and the radio-frequency transmitter module of base station, other hardware facility can use in complete reservation, and do not increase new equipment, when guaranteeing the normal operation of whole mobile communication system network, can significantly reduce improvement expenses.This technical scheme can also extend to the civilian or military frequency range of other satellite, also can be applicable on the multimode positioning navigation device simultaneously.
Description of drawings
Fig. 1 is the utility model big dipper multi-mode time service receiving device schematic diagram
Fig. 2 is the utility model multi-mode radio frequency receiver module schematic diagram
Embodiment
Embodiment one:
Broadband time-service active antenna circuit is by broadband ceramic medium antenna 101, prefilter 102, low noise field-effect amplifier 103, broadband filter 104, monolithic low noise amplifier 105, anti-lightning strike surge impact circuit 106, power supply voltage stabilizing circuit 107, contain the two-sided printing copper-clad plate of microstrip circuit, formations such as N type needle electric coupler, operation principle is: broadband ceramic medium antenna 101 receives from GPS, Galileo and " two generations of the Big Dipper " satellite time service carrier signal, guarantee to suppress outside 1550 to the 1580MHz bands through prefilter 102 filtering, send low noise field-effect amplifier 103 to amplify then, broadband signal through amplifying enters broadband filter 104, the formation center frequency point is 1570MHz, cover the carrier signal of 1561.098MHz and 1575.42MHz simultaneously, or adopt staggered tuning one-tenth multifrequency point wideband filtered, amplify through monolithic low noise amplifier 105 again, guarantee that entire gain is more than 20db, noise is below 2.5db, then by N type needle electric coupler and the lightning arrester that is connected the base station, coaxial cable connects, and transmits signals to the multi-mode radio frequency receiver module.
The multi-mode radio frequency receiver module is by narrow band filter 201, frequency mixer 202, comprehensive frequency generator 203, intermediate frequency integrated filter 204, AGC automatic gain control amplifier 205, A/D analog to digital converter 206, access control processor 207, network interface 208 formations such as grade, its operation principle is: transfer to the broadband high-frequency signals of multi-mode radio frequency receiver module respectively through two narrow band filter 201 filtering through coaxial cable, produce centre frequency and be respectively 1575.42MHz and 1561.098MHz, the frequency response bandwidth is two groups of high frequency analog signals of 4.092MHz, enter frequency mixer 202 separately then respectively, carry out the down-conversion mixing with the local frequency that comprehensive frequency generator 203 produces, produce two centre frequency differences through mixing, the analog intermediate frequency signal that bandwidth is identical.Because the bandwidth of GPS time signal is 2.046MHz, Galileo is 4.092MHz, therefore the wherein one group of intermediate-freuqncy signal after down-conversion is comprising GPS and two groups of satellite time service informations of Galileo simultaneously, another group then is the Big Dipper two a generations intermediate-freuqncy signal, bandwidth is 4.092MHz, two groups of intermediate-freuqncy signals enter intermediate frequency integrated filter 204 simultaneously, access control processor is given tacit consent to one of them satellite time service intermediate-freuqncy signal automatically according to centre frequency and band bandwidth and pulse code quality, other is as standby, main signal enters AGC automatic gain control amplifier 205 after filtering, entering A/D analog-digital demodulation device 206 then finishes analog-to-digital conversion and resolves, pulse digit time after access control processor 207 will resolve is by network interface 208, and according to and base station time synchronized machine between communication protocol and the technical specification set up, the time pulse synchronizing signal is transferred to base station time synchronized substrate, guarantee that mobile communication system is synchronized with a fiducial time.As shown in Figure 1.
Embodiment two:
This technical scheme is to adopt software engineering that the multimode time signal is carried out demodulation, for containing existing four kinds of satellite navigation system time services, the broadband time-service active antenna is received bandwidth be extended to 1620MHz, increase GLONASS narrow band filter 201 in the multi-mode radio frequency receiver module, its centre frequency is 1602.56MHz bandwidth 10MHz; A multimode signal selector 209 was set before frequency mixer 202, the major function of this selector 209 is that the high-frequency signal incoming level to the input radio frequency receiver detects, or carrying out demodulation by the time signal of acquiescence, time signal is strong through relatively judge selecting, pulse code distortion smaller is as the time service main signal; Multimode signal selector 209 is responsible for monitoring by the signal level detecter 210 that independently is provided with or is arranged on access control processor 207, corresponding is that intermediate frequency integrated filter 211 able to programme is made corresponding IF spot and frequency band change action according to the control command of signal level detecter 210 or access control processor 207 simultaneously, to guarantee digital demodulator 212 accurate demodulation; Frequency mixer 202 can be provided with one, or switches local frequency synchronously; LNA wideband low noise amplifier 205, A/D analog to digital converter 206 are arranged on after the frequency mixer, to guarantee intermediate-frequency filter 211 needed number intermediate-freuqncy signal and gain amplifiers able to programme.Other is the same.As shown in Figure 2.
In view of whether GLONASS satellite carrier frequency changes frequently and how to change frequently, all will influence the enforcement of the another kind of technical scheme of the utility model, so the utility model is that example is illustrated with the downlink carrier frequency parameter of current transmission only; In addition because software programmable intermediate frequency filtering and digital demodulation techniques are ripe; programmable filter software also can have different pattern and the versions write with time service digital demodulation software; even change can not change with the Big Dipper two on behalf of the compatible receiving mode of main multimode yet; therefore; all identical with the present technique implementation or equivalents with principle; its essence all falls into the row of the present invention's protection, be engaged in these those skilled in the art should with understanding.
Claims (4)
1. big dipper multi-mode time service receiving device is by the broadband time-service active antenna, the multi-mode radio frequency receiver module is formed, it is characterized in that: described broadband time-service active antenna is by broadband ceramic dielectric reception antenna, preposition band pass filter, the low noise field-effect amplifier, broadband band-pass filter, the monolithic low noise amplifier, anti-lightning strike surge impact circuit, the power supply voltage stabilizing circuit, contain the two-sided printing copper-clad plate of microstrip circuit, N type needle electric coupler is formed, described ceramic medium antenna is a broad-band reception antenna, can accept GPS simultaneously, Galileo and " two generations of the Big Dipper " or GLONASS satellite time service carrier signal, receive frequency is respectively the 1561.098MHz and the GPS in " two generations of the Big Dipper ", the 1575.42MHz of Galileo, the 1602.56MHz of GLONASS; This ceramic medium antenna is arranged at the one side of printing copper-clad plate, and is connected to preposition band pass filter input by lead-in wire; Above-mentioned preposition band pass filter, low noise field-effect amplifier, broadband band-pass filter, one chip amplifier and anti-lightning strike surge impact circuit and power supply voltage stabilizing circuit are positioned at the another side of printing copper-clad plate; Above circuit shields fully and splits in two metallic enclosures, and preposition band pass filter and low noise field-effect amplifier place in the metallic enclosure, and remaining circuit places in another shielding cavity; Described multi-mode radio frequency receiver module is by multimode narrow band filter, frequency mixer; The comprehensive generator of shared frequency, intermediate frequency integrated filter, AGC automatic gain amplifier, A/D analog to digital converter and an access control processor, network interface; Multimode signal selector, signal level detecter, intermediate-frequency filter able to programme, digital demodulator are formed, described multi-mode radio frequency receiver module adopts the method for integrated circuit to be produced on one or two chip, and the multi-mode radio frequency receiver module is installed and is mounted on one and covers on the copper printed circuit board.
2. big dipper multi-mode time service receiving device according to claim 1 is characterized in that: described broadband band-pass filter adopts Ceramic Dielectric Filter part or SAW (Surface Acoustic Wave) device, and the frequency response bandwidth is 1550 to 1580MHz, 1620MHz; Or adopt staggered tuning band pass filter, wherein f
01Be the 1561.098MHz in " two generations of the Big Dipper ", f
021575.42MHz for GPS and Galileo; Or f
031602.56MHz for GLONASS.
3. big dipper multi-mode time service receiving device according to claim 1, it is characterized in that: described multimode narrow band filter adopts Ceramic Dielectric Filter part or SAW (Surface Acoustic Wave) device, centre frequency is respectively 1561.098MHz and 1575.42MHz, and bandwidth is 4.092MHz; Or the 1602.56MHz of GLONASS.
4. big dipper multi-mode time service receiving device according to claim 1 is characterized in that: described intermediate frequency integrated filter is for can write intermediate-frequency filter; Adopt discrete device settings such as Ceramic Dielectric Filter or surface acoustic wave, its centre frequency depends on the selection of local frequency, is arranged on 1 to 30MHz; The intermediate-frequency bandwidth of GPS is 2.046MHz, and the intermediate-frequency bandwidth of two generations of the Big Dipper and Galilieo is 4.092MHz.
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| CN200920101921U CN201388192Y (en) | 2009-03-17 | 2009-03-17 | Big Dipper multi-mode time service receiving device |
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| CN200920101921U CN201388192Y (en) | 2009-03-17 | 2009-03-17 | Big Dipper multi-mode time service receiving device |
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| CN201388192Y true CN201388192Y (en) | 2010-01-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170693A (en) * | 2010-07-01 | 2011-08-31 | 武汉盛华微系统技术股份有限公司 | Time control system and control method based on Beidou navigation satellite system |
| CN102299722A (en) * | 2010-06-24 | 2011-12-28 | 中兴通讯股份有限公司 | External receiver patching board |
| CN102313892A (en) * | 2010-05-31 | 2012-01-11 | 北京联星科通微电子技术有限公司 | GPS (Global Position System) and GLONASS (Global Orbiting Navigation Satellite System) multichannel parallel signal tracking method and module |
| CN105429682A (en) * | 2014-09-11 | 2016-03-23 | 中国电信股份有限公司 | Self-adaptive control apparatus and method for work mode of active antenna |
| CN108519608A (en) * | 2018-03-09 | 2018-09-11 | 中国航天电子技术研究院 | A kind of satellite navigation based on array antenna is anti-interference and surveys attitude positioning method |
-
2009
- 2009-03-17 CN CN200920101921U patent/CN201388192Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313892A (en) * | 2010-05-31 | 2012-01-11 | 北京联星科通微电子技术有限公司 | GPS (Global Position System) and GLONASS (Global Orbiting Navigation Satellite System) multichannel parallel signal tracking method and module |
| CN102313892B (en) * | 2010-05-31 | 2014-07-02 | 北京联星科通微电子技术有限公司 | GPS (Global Position System) and GLONASS (Global Orbiting Navigation Satellite System) multichannel parallel signal tracking method and module |
| CN102299722A (en) * | 2010-06-24 | 2011-12-28 | 中兴通讯股份有限公司 | External receiver patching board |
| CN102299722B (en) * | 2010-06-24 | 2014-12-10 | 中兴通讯股份有限公司 | External receiver patching board |
| CN102170693A (en) * | 2010-07-01 | 2011-08-31 | 武汉盛华微系统技术股份有限公司 | Time control system and control method based on Beidou navigation satellite system |
| CN105429682A (en) * | 2014-09-11 | 2016-03-23 | 中国电信股份有限公司 | Self-adaptive control apparatus and method for work mode of active antenna |
| CN105429682B (en) * | 2014-09-11 | 2018-06-05 | 中国电信股份有限公司 | The adaptive controller and method of active antenna operating mode |
| CN108519608A (en) * | 2018-03-09 | 2018-09-11 | 中国航天电子技术研究院 | A kind of satellite navigation based on array antenna is anti-interference and surveys attitude positioning method |
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