CN203178493U - Beidou-GPS dual-mode positioning and navigation radio frequency receiving system - Google Patents
Beidou-GPS dual-mode positioning and navigation radio frequency receiving system Download PDFInfo
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- CN203178493U CN203178493U CN 201320198772 CN201320198772U CN203178493U CN 203178493 U CN203178493 U CN 203178493U CN 201320198772 CN201320198772 CN 201320198772 CN 201320198772 U CN201320198772 U CN 201320198772U CN 203178493 U CN203178493 U CN 203178493U
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Abstract
The utility model discloses a Beidou-GPS dual-mode positioning and navigation radio frequency receiving system. A GPS signal and a Beidou satellite signal received by a satellite signal receiving antenna are amplified by a low-noise amplifier, then enter band pass filters corresponding to respective frequency ranges and then are further amplified by low-noise amplifiers. Dual-mode signals are subjected to frequency mixing through mixers. Satellite signals are loaded on an operational frequency band suitable for subsequent processing. The work frequencies of the mixers are provided by phase-locked loops, and a temperature compensating crystal oscillator and a clock buffer provide reference clocks needed in the operation of the phase-locked loops. The dual-mode signals loaded on an intermediate frequency are filtered by an intermediate frequency filter respectively and then subjected to automatic gain by automatic gain control modules in dependence on the strength of the satellite signals so as to provide stable processing signals. Then the dual-mode signals are subjected to analog-to-digital conversion by an analog-to-digital converter respectively, and dual-mode satellite digital signals are subjected to operation processing by a digital signal processing module.
Description
Technical field
The utility model relates to the satellite positioning navigation technical field, the concrete location navigation radio-frequency receiving system that refers to.
Background technology
The GPS bearing accuracy height of present commonplace use, application surface is the widest, but is subjected to the influence of clock correction, multipath and restricted interference, especially in built-up downtown area.Say that technically its sensitivity, start-up time, bearing accuracy all reach capacity.From politics and economically, China, Europe, Russia also are unwilling the economic and political destiny of own country is grasped in American hand.
In order to safeguard national interests, China has developed the NAVSTAR of oneself---dipper system, the Beidou satellite navigation system of China, though solved politics and economic problems, the Big Dipper adopts the passive type mode of high rail for No. one, the Big Dipper has then adopted the low rail active mode identical with GPS for No. two, but does not improve on these two kinds of Big Dipper location and navigation technologies and properties of product, and is subjected to the restriction in GPS market.The result who causes Big Dipper product to be difficult to popularize in the commercial market.The big-dipper satellite industrial field has 2,000 hundred million the market space, and this technical products will have tens billion of market demands.
Common single mode satellite positioning navigation (as GPS) with chip or module by low noise amplifier LNA, frequency converter (also claiming frequency mixer), frequency synthesizer, in put, bandpass filtering, capturing function piece and following function piece etc. form.It can only receive the satellite-signal of the global position system of a system, and the line data of going forward side by side is handled and then is used for locating or navigation.GPS single mode satellite navigation system is covered as the fruit part satellite, perhaps receive to disturb and when covering satellite-signal weaken, will produce and can not navigate or serious problems such as sensitivity is low, bearing accuracy difference.Also there is same problem in the big-dipper satellite Position Fixing Navigation System.
Domesticly some have also occurred and adopted the synthetic module of gps satellite and big-dipper satellite front-end processing chip respectively, though this module has the function of the Big Dipper and the use of GPS dual-satellite system, but its cost height, volume is big, power consumption is high, satellite data fails to share, therefore, location navigation data (as start-up time, sensitivity, bearing accuracy) obviously do not improve.
The utility model content
The utility model will solve single-mode systems such as GPS or big-dipper satellite exactly, being subject to multipath interference and object covers, and problem such as GPS artificial interference, the extremely utilization factor of data of number of satellite further is provided, employing science algorithm, and then improve key indexs such as start-up time, bearing accuracy and sensitivity.Also reduce chip area and power consumption simultaneously, enabled to be applied to civilian vehicle mounted guidance and hand-held product.
For solving the problems of the technologies described above the technical scheme that adopts: a kind of Big Dipper, GPS bimodulus location navigation radio-frequency receiving system, comprise satellite signal receiving antenna, low noise amplifier one, bandpass filter one, bandpass filter two, low noise amplifier two, low noise amplifier three, frequency mixer one, frequency mixer two, phaselocked loop one, phaselocked loop two, the temperature compensation crystal resonator, clock buffer, intermediate-frequency filter one, intermediate-frequency filter two, automatic gain control module one, automatic gain control module two, analog to digital converter one, analog to digital converter two and digital signal processing module, described satellite signal receiving antenna is connected to the input end of low noise amplifier, the input end of bandpass filter one and bandpass filter two is connected to the output terminal of low noise amplifier, the output terminal of bandpass filter one is connected with the input end of low noise amplifier two, the output terminal of low noise amplifier two is connected with the input end of frequency mixer one, the output terminal of frequency mixer one is connected with the input end of intermediate-frequency filter one, the output terminal of intermediate-frequency filter one is connected with the input end of automatic gain control module one, the output terminal of automatic gain control module one is connected with the input end of analog to digital converter one, the output terminal of bandpass filter two is connected with the input end of low noise amplifier three, the output terminal of low noise amplifier three is connected with the input end of frequency mixer two, the output terminal of frequency mixer two is connected with the input end of intermediate-frequency filter two, the output terminal of intermediate-frequency filter two is connected with the input end of automatic gain control module two, the output terminal of automatic gain control module two is connected with the input end of analog to digital converter two, the output terminal of analog to digital converter one and analog to digital converter two is connected respectively to digital signal processing module, the output terminal of phaselocked loop one and phaselocked loop two is connected respectively to frequency mixer one and frequency mixer two, the input end of phaselocked loop one and phaselocked loop two is connected with the temperature compensation crystal resonator, and the temperature compensation crystal resonator is connected to digital signal processing module by clock buffer.
The beneficial effect that adopts the utility model to bring: the utility model has adopted front end to hold concurrently mutually, the principle that Back end data is shared, make this chip module have 3 big advantages: 1, compatible homemade Big Dipper positioning system satellite of while and GPS positioning system satellite two cover systems, so the bimodulus of meaning; 2, because data sharing, preferred dual system satellite, under the situation of, alternate position spike few at the single system number of satellite, location navigation data (as start-up time, sensitivity, bearing accuracy) obviously improve 50% advantage; 3, the employing of this technology makes the area of chip module reduce 30%, and power consumption also reduces 30%, enables to adapt to vehicle mounted guidance and hand-held product.
Description of drawings
Fig. 1 is mechanism's block diagram of the utility model Big Dipper, GPS bimodulus location navigation radio-frequency receiving system.
Embodiment
As shown in Figure 1, a kind of Big Dipper, GPS bimodulus location navigation radio-frequency receiving system comprises satellite signal receiving antenna 1, low noise amplifier 1, bandpass filter 1, bandpass filter 24, low noise amplifier 25, low noise amplifier 36, frequency mixer 1, frequency mixer 28, phaselocked loop 1, phaselocked loop 2 10, temperature compensation crystal resonator 11, clock buffer 12, intermediate-frequency filter 1, intermediate-frequency filter 2 14, automatic gain control module 1, automatic gain control module 2 16, analog to digital converter 1, analog to digital converter 2 18 and digital signal processing module 19.Described satellite signal receiving antenna 1 is connected to the input end 2 of low noise amplifier, the input end of bandpass filter 1 and bandpass filter 24 is connected to the output terminal of low noise amplifier 2, the output terminal of bandpass filter 1 is connected with the input end of low noise amplifier 25, the output terminal of low noise amplifier 25 is connected with the input end of frequency mixer 1, the output terminal of frequency mixer 1 is connected with the input end of intermediate-frequency filter 1, the output terminal of intermediate-frequency filter 1 is connected with the input end of automatic gain control module 1, the output terminal of automatic gain control module 1 is connected with the input end of analog to digital converter 1, the output terminal of bandpass filter 24 is connected with the input end of low noise amplifier 36, the output terminal of low noise amplifier 36 is connected with the input end of frequency mixer 28, the output terminal of frequency mixer 28 is connected with the input end of intermediate-frequency filter 2 14, the output terminal of intermediate-frequency filter 2 14 is connected with the input end of automatic gain control module 2 16, the output terminal of automatic gain control module 2 16 is connected with the input end of analog to digital converter 2 18, the output terminal of analog to digital converter 1 and analog to digital converter 2 18 is connected respectively to digital signal processing module 19, the output terminal of phaselocked loop 1 and phaselocked loop 2 10 is connected respectively to frequency mixer 1 and frequency mixer 28, the input end of phaselocked loop 1 and phaselocked loop 2 10 is connected with temperature compensation crystal resonator 11, and temperature compensation crystal resonator 11 is connected to digital signal processing module 19 by clock buffer 12.
The GPS that satellite signal receiving antenna 1 receives and Big Dipper satellite signal after low noise amplifier 1 amplifies, enter into corresponding bandpass filter 1 and the bandpass filter 24 of frequency range separately respectively.Gps signal and Big Dipper signal are done further to amplify through low noise amplifier 25 and low noise amplifier 36 respectively, respectively gps signal and Big Dipper signal are carried out mixing by frequency mixer 1 and frequency mixer 28, satellite-signal is loaded into on the working frequency range that is fit to subsequent treatment.Wherein the frequency of operation of frequency mixer 1 and frequency mixer 28 is provided by phaselocked loop 1 and phaselocked loop 2 10 respectively, and temperature compensation crystal resonator 11 and clock buffer 12 provide required reference clock for the work of phaselocked loop 1 and phaselocked loop 2 10.Be loaded into gps signal on the intermediate frequency and Big Dipper signal respectively after intermediate-frequency filter 1 and intermediate-frequency filter 2 14 filtering, respectively gps signal and Big Dipper signal are carried out automatic gain by automatic gain control module 1 and automatic gain control module 2 16 according to the power of satellite-signal, so that the stable treated signal to be provided.Respectively gps signal and Big Dipper signal are carried out analog to digital conversion by analog to digital converter 1 and analog to digital converter 2 18 then, convert gps signal and Big Dipper signal to digital signal for digital signal processing module 19 processing.Satellite digital signal by 19 couples of GPS of digital signal processing module and the Big Dipper carries out calculation process, data-switching (is generally WGS-84) under same coordinate-system separately, enter satellite acquisition Search module then, Satellite Tracking Track module is carried out data processing operation, be output as equipment after data are handled locating navigation information is provided, realize data sharing.
The utility model shares same front end low noise amplifier LNA, therefore can compatible two cover satellite systems.And share same vibrating system (temperature compensation crystal resonator, clock buffer), therefore can share two cover satellite systems;
Big-dipper satellite has 16 stars at present, will reach 36 future, and big-dipper satellite adopts the mode of height rail combination, have double star and Samsung bi-locating function, cover little, therefore in Big Dipper overlay area, because its finding sky number of satellite is doubled, have double star and Samsung bi-locating function simultaneously again.Therefore adopt big-dipper satellite and GPS bimodulus location technology, can be initiatively with passive positioning complementation, the complementation of height rail, double star and three star problem complementation, can hold concurrently altogether, make the number of satellite that receives far more than the gps satellite quantity of single mode.
Data sharing type bimodulus location technology of the present utility model is exactly to adopt bimodulus module or chip global position systems such as GPS and the Big Dipper simultaneously, can be initiatively and passive positioning complementation, the complementation of height rail, double star complementary with the four stars location, but start shooting moment the receiving satellite amount be doubled with satellite distribution reasonable.System uses same wide frequency antenna and LNA1, the Big Dipper and gps signal enter suitable filters 1, wave filter 2 and frequency mixer 1 and frequency mixer 2 separately respectively, the output intermediate frequency, enter AGC, and then decoding, thereby realized the module that bimodulus shares, the satellite data of two cover satellite systems all participates in locating computing after the decoding, carry out satellite acquisition Search, Satellite Tracking Track, so number of satellite is doubled, sensitivity, start-up time, bearing accuracy all will be greatly improved.From theoretical and actual test result, bearing accuracy improves 30%, reaches 2.5 meters.Only be equivalent to 50% of GPS start-up time first, even 25%, namely 30 seconds.
System uses same wide frequency antenna and LNA, two satellite-signal signals enter suitable filters and frequency mixer separately respectively, the output intermediate frequency, and then decoding, thereby realized the module that bimodulus shares, the satellite datas of two cover satellite systems all participate in locating computing after the decoding, so number of satellite is doubled, and sensitivity, start-up time, bearing accuracy all will be greatly improved.Make primary positioning time foreshorten to 25%, bearing accuracy improves 30%.
Claims (1)
1. Big Dipper, GPS bimodulus location navigation radio-frequency receiving system, it is characterized in that: comprise satellite signal receiving antenna, low noise amplifier one, bandpass filter one, bandpass filter two, low noise amplifier two, low noise amplifier three, frequency mixer one, frequency mixer two, phaselocked loop one, phaselocked loop two, the temperature compensation crystal resonator, clock buffer, intermediate-frequency filter one, intermediate-frequency filter two, automatic gain control module one, automatic gain control module two, analog to digital converter one, analog to digital converter two and digital signal processing module, described satellite signal receiving antenna is connected to the input end of low noise amplifier, the input end of bandpass filter one and bandpass filter two is connected to the output terminal of low noise amplifier, the output terminal of bandpass filter one is connected with the input end of low noise amplifier two, the output terminal of low noise amplifier two is connected with the input end of frequency mixer one, the output terminal of frequency mixer one is connected with the input end of intermediate-frequency filter one, the output terminal of intermediate-frequency filter one is connected with the input end of automatic gain control module one, the output terminal of automatic gain control module one is connected with the input end of analog to digital converter one, the output terminal of bandpass filter two is connected with the input end of low noise amplifier three, the output terminal of low noise amplifier three is connected with the input end of frequency mixer two, the output terminal of frequency mixer two is connected with the input end of intermediate-frequency filter two, the output terminal of intermediate-frequency filter two is connected with the input end of automatic gain control module two, the output terminal of automatic gain control module two is connected with the input end of analog to digital converter two, the output terminal of analog to digital converter one and analog to digital converter two is connected respectively to digital signal processing module, the output terminal of phaselocked loop one and phaselocked loop two is connected respectively to frequency mixer one and frequency mixer two, the input end of phaselocked loop one and phaselocked loop two is connected with the temperature compensation crystal resonator, and the temperature compensation crystal resonator is connected to digital signal processing module by clock buffer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320198772 CN203178493U (en) | 2013-04-18 | 2013-04-18 | Beidou-GPS dual-mode positioning and navigation radio frequency receiving system |
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| CN 201320198772 CN203178493U (en) | 2013-04-18 | 2013-04-18 | Beidou-GPS dual-mode positioning and navigation radio frequency receiving system |
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| CN 201320198772 Expired - Fee Related CN203178493U (en) | 2013-04-18 | 2013-04-18 | Beidou-GPS dual-mode positioning and navigation radio frequency receiving system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104536021A (en) * | 2015-01-26 | 2015-04-22 | 武汉大学苏州研究院 | Dual-mode reconfigurable radio frequency front end receiving system of GNSS (global navigation satellite system) |
| CN111399008A (en) * | 2020-04-07 | 2020-07-10 | 华南理工大学 | Multi-mode multi-channel navigation receiving device |
| CN111505674A (en) * | 2020-05-22 | 2020-08-07 | 陕西天基通信科技有限责任公司 | Dual-mode amplification multi-path distribution system with anti-interference function and distribution method |
-
2013
- 2013-04-18 CN CN 201320198772 patent/CN203178493U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104536021A (en) * | 2015-01-26 | 2015-04-22 | 武汉大学苏州研究院 | Dual-mode reconfigurable radio frequency front end receiving system of GNSS (global navigation satellite system) |
| CN111399008A (en) * | 2020-04-07 | 2020-07-10 | 华南理工大学 | Multi-mode multi-channel navigation receiving device |
| CN111399008B (en) * | 2020-04-07 | 2020-12-04 | 华南理工大学 | Multi-mode multi-channel navigation receiving device |
| CN111505674A (en) * | 2020-05-22 | 2020-08-07 | 陕西天基通信科技有限责任公司 | Dual-mode amplification multi-path distribution system with anti-interference function and distribution method |
| CN111505674B (en) * | 2020-05-22 | 2022-04-05 | 陕西天基通信科技有限责任公司 | Dual-mode amplification multi-path distribution system with anti-interference function and distribution method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: FOSHAN BEIDOU ZHIXING TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LI JIN Effective date: 20140508 Free format text: FORMER OWNER: QIU HAIYAN Effective date: 20140508 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140508 Address after: 406, building 528225, building A, South China Sea software science and Technology Park, Nanhai Town, Nanhai District, Foshan, Guangdong Patentee after: Foshan Beidou Zhixing Technology Co., Ltd. Address before: 406 building A, building 528225, Nanhai Software Science Park, Nanhai Town, Foshan, Guangdong, Shishan Patentee before: Li Jin Patentee before: Qiu Haiyan |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20160418 |
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| CF01 | Termination of patent right due to non-payment of annual fee |