CN2700895Y - Delay mapping receiver based on global satellite positioning system - Google Patents
Delay mapping receiver based on global satellite positioning system Download PDFInfo
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- CN2700895Y CN2700895Y CN 200420050636 CN200420050636U CN2700895Y CN 2700895 Y CN2700895 Y CN 2700895Y CN 200420050636 CN200420050636 CN 200420050636 CN 200420050636 U CN200420050636 U CN 200420050636U CN 2700895 Y CN2700895 Y CN 2700895Y
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Abstract
The utility model discloses a delay mapping receiver based on global satellite positioning system. The receiver comprises a dextrorotation GPS antenna, a levorotation GPS antenna, a radio frequency front end handler, a multi-channel correlator, a high speed processor with the ability of floating-point arithmetic and an interface circuit. Wherein, the dextrorotation GPS antenna and the levorotation GPS antenna are connected with the multi-channel correlator through the radio frequency front end respectively. The multi-channel correlator is connected with the high speed processor respectively through a data wire and a control line. The high speed processor is connected with the interface circuit via the data wire of the high speed processor. The delay mapping receiver can receive simultaneously dextrorotation GPS signal and levorotation GPS signal, exports correlative power and navigational fixing solution of different delay time, and proceeds detection of sea level and wind field. Data output is also used in the fields of soil humidity checking, sea level height measurement, sea ice measure and terrain measurement etc. The anti-interference ability given by signal reflection to GPS position and tracking performance is analyzed.
Description
Technical field
The utility model relates to a kind of receiver, especially a kind of delay mapping receiver that is used for receiving simultaneously dextrorotation gps signal and left-handed gps signal based on Global Positioning System (GPS).
Background technology
In the measurement means of many Marine Environmental Elements such as sea surface wind and ripple, stream, microwave remote sensing modes such as scatterometer, synthetic-aperture radar are successful Application.These active microwave windfinding sensors mostly adopt homology observation, are made up of emitter and receiving trap, and service band is many at Ku, C and L-band, the linear polarization mode.
In addition, adopting Global Positioning System (GPS)-GPS constellation is multi-source microwave signal emissive source, by the GPS receiving trap that carries on the airborne remote sensing platform, but round-the-clock, round-the-clock, large tracts of land continuous acquisition monitoring sea GPS L1 band emission signal and scatter echo signal, thereby realize the wind field inverting.
In order to utilize the gps signal of sea surface reflection, carry out Ocean Wind-field and survey, receiving trap must can receive left-handed gps signal, and output difference as requested postpones related powers constantly; Simultaneously, also want to receive the dextrorotation gps signal of direct projection, carry out navigator fix and find the solution.Existing GPS receiver all has only the dextrorotation gps antenna, can only receive the dextrorotation gps signal, be used for functions such as location and measurement, and generally only has a radio-frequency front-end, can not receive the left-handed gps signal of reflection and the dextrorotation gps signal of direct projection simultaneously, do not comprise the different signal correction power constantly that postpone in the output data yet, can not satisfy above-mentioned requirements.
The utility model content
The technical problems to be solved in the utility model is at the deficiencies in the prior art, a kind of delay mapping receiver based on Global Positioning System (GPS) is proposed, receive dextrorotation gps signal and left-handed gps signal simultaneously, different related power and the navigator fixs constantly that postpone of output are separated, and carry out Ocean Wind-field and survey.
The utility model is realized by the following technical solutions:
A kind of delay mapping receiver based on Global Positioning System (GPS), comprise dextrorotation gps antenna, left-handed gps antenna, radio-frequency front-end processor, hyperchannel correlator, high speed processor, interface circuit with floating-point operation ability, wherein, dextrorotation gps antenna, left-handed gps antenna are connected with the hyperchannel correlator by the radio-frequency front-end processor respectively, the hyperchannel correlator is connected with high speed processor respectively by data line, control line, and high speed processor is connected with interface circuit by its data line.
Described dextrorotation gps antenna receives the L1 wave band direct projection satellite-signal that has navigation information, and this signal is input to the radio-frequency front-end processor, and after the radio-frequency front-end processor processing, the output digital signal is in the last antenna correlator of hyperchannel correlator;
Described left-handed gps antenna receives the gps satellite signal of reflection, and this signal is input to the radio-frequency front-end processor, and after the processing through the radio-frequency front-end processor, the output digital signal is in the following antenna correlator of hyperchannel correlator.
Described hyperchannel correlator can be configured to antenna correlator and following antenna correlator two parts, handles direct projection and reflected signal respectively and result is outputed to high speed processor.
Described high speed processor receives the signal of hyperchannel correlator output, forms navigation information, different chip delay related power information constantly through the software processes that loads on it, and these information package compression backs are exported by interface circuit.
The utility model also comprises the storer that is used for canned data; Described storer is EPROM or EEPROM or flash memory or its combination.
The utility model also comprises state indicating device, and described indicating device is used for the indication of duty, can be LED, also can be LCD, also can be this combination of two kinds.
Described radio-frequency front-end processor is to be used to finish to the down coversion of gps signal and the standard module of A/D sampling.
Described high speed processor is to have the DSP of floating-point operation ability or based on the processor of ARM kernel or based on the processor of DSP and ARM dual core.
Described interface circuit is RS232 interface circuit or usb circuit.
In addition, described dextrorotation gps antenna is general gps antenna, the composition of left-handed gps antenna is identical with the dextrorotation gps antenna, comprise antenna body, circular polarisation feeding network, match circuit and the built-in low noise amplifier that to respond to microwave signal, difference is that two feeding points in the described circular polarisation feeding network are opposite with the dextrorotation gps antenna with the antenna body connected mode.Signal that can the actual induction left-hand circular polarization is so can receive through sea surface reflection left-hand circular polarization gps signal.
The left-handed gps antenna that the utility model provides can receive the direct projection dextrorotation gps signal through reflection, the receiver that the utility model provides can receive dextrorotation gps signal and left-handed gps signal simultaneously, different related power and the navigator fixs constantly that postpone of output are separated, and carry out Ocean Wind-field and survey; The data of output also can be used for fields such as soil moisture detection, sea level height measurement, sea ice measurement, topographical surveying; In addition,, also can analyze the LHCP signal of reflection because this receiver adopts a special left-handed polarized wave GPS receiving antenna, thus to since signal reflex the interference free performance of GPS location and tracking performance is analyzed.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the structural representation of the utility model embodiment;
Fig. 3 is one of circuit theory diagrams of the utility model embodiment;
Fig. 4 be the utility model embodiment circuit theory diagrams two;
Fig. 5 be the utility model embodiment circuit theory diagrams three;
Fig. 6 be the utility model embodiment circuit theory diagrams four;
Fig. 7 be the utility model embodiment circuit theory diagrams five.
Embodiment
At present, adopt Global Positioning System (GPS)-GPS constellation as multi-source microwave signal emissive source, by the GPS receiving trap that carries on the airborne remote sensing platform, round-the-clock, round-the-clock, large tracts of land continuous acquisition monitoring sea GPS L1 band emission signal and scatter echo signal, thus realize the wind field inverting.This allos observation mode descends the complexity of sensor and cost greatly.
And receiver adopts spread spectrum technology, and the processing gain that adopts spread spectrum technology to bring makes the GPS receiver can receive the feeble signal that is lower than ground unrest 19dB, can extract effective information in very faint signal.In addition, generally, any moment can be seen 10 or above satellite, and a large amount of signal sources help the raising of GPS remote sensing precision.
Therefore, adopt Global Positioning System (GPS)-GPS constellation to carry out Ocean Wind-field and survey, can reduce the complexity and the cost of sensor; The employing radius is that several centimetres hemisphere antenna can receive effective reflected signal; Therefore, the utility model proposes and a kind ofly can receive dextrorotation gps signal and left-handed gps signal simultaneously, output is different to postpone the GPS receivers that related power constantly and navigator fix are separated, and is used for Ocean Wind-field and surveys.
Referring to Fig. 1, be the utility model structural representation, a kind of delay mapping receiver based on Global Positioning System (GPS), comprise dextrorotation gps antenna 1, left-handed gps antenna 2, radio-frequency front-end processor 3,3 ', hyperchannel correlator 4, high speed processor 5 with floating-point operation ability, interface circuit 6, dextrorotation gps antenna 1 is connected with hyperchannel correlator 4 by radio-frequency front-end processor 3, left-handed gps antenna 2 is connected with hyperchannel correlator 4 by radio-frequency front-end processor 3 ', hyperchannel correlator 4 passes through data line, control line is connected with high speed processor 5, and high speed processor 5 is connected with interface circuit 6 by data line.
For canned data, also comprise storer 7, in order to show duty of the present utility model, also comprise state indicating device 8.
Described dextrorotation gps antenna 1 receives the L1 wave band direct projection satellite-signal that has navigation information, and this signal is input to radio-frequency front-end processor 3, and after handling through radio-frequency front-end processor 3, the output digital signal is in the last antenna correlator of hyperchannel correlator 4;
Described left-handed gps antenna 2 receives the gps satellite signal of reflection, and this signal is input to radio-frequency front-end processor 3 ', and after the processing through radio-frequency front-end processor 3 ', the output digital signal is in the following antenna correlator of hyperchannel correlator 4.
Described hyperchannel correlator 4 can be configured to antenna correlator and following antenna correlator two parts, handles direct projection and reflected signal respectively and result is outputed to high speed processor.
Described high speed processor 5 is loaded with process software, code delay and carrier frequency to hyperchannel correlator 4 are carried out direct open loop control, can carry out half code delay and cross correlation process one by one to the signal of dextrorotation gps antenna 1 and left-handed gps antenna 2, the output power of record hyperchannel correlator 4, its data are exported by interface circuit.
Indicating device 8 is used to show the running status of receiver.
Below by specific embodiment the utility model is described in detail.
Referring to Fig. 2, be the structural representation of the utility model embodiment.In the present embodiment, high speed processor adopts the floating-point operation chip TMS320C33 DSP 50 of TI company, 32 bit instruction width, 24 bit address buses, have high-speed and high-accuracy arithmetic ability, the highest 150MFLOPS arithmetic capability has the 34Kx32-Bit internal SRAM, adopt 1.8V kernel and 3.3VI/0 power supply, low-power consumption.
Radio-frequency front-end processor 30,30 ' adopts the GPS chip GP2010 of Zarlink company, finishes three grades of frequency conversions to the GPS microwave signal, has stronger antijamming capability.
The composition of left-handed gps antenna 20 is identical with dextrorotation gps antenna 10, comprise antenna body, circular polarisation feeding network, match circuit and the built-in low noise amplifier that to respond to microwave signal, difference is that two feeding points in the described circular polarisation feeding network are opposite with the dextrorotation gps antenna with the antenna body connected mode.
The circuit diagram of present embodiment is shown in Fig. 3-7:
As Fig. 3, shown in Figure 5, the dextrorotation gps antenna is by high-frequency joint (SMA1 in the circuit diagram) output signal RF, be connected with the pin two 9 of radio-frequency front-end processor IC1 GP2010, digital signal after output process down coversion and the A/D sampling, by pin one 2 and 13 output SIGN0 and two kinds of signals of MAG0 of IC1 GP2010, be connected to the pin 76 and 77 of hyperchannel correlator IC3 GP2021.
As Fig. 4, shown in Figure 5, left-handed gps antenna is by high-frequency joint (SMA2 in the circuit diagram) output signal SRF, be connected with the pin two 9 of radio-frequency front-end processor SIC1 GP2010, digital signal after output process down coversion and the A/D sampling, by pin one 2 and 13 output SIGN1 and two kinds of signals of MAG1 of radio-frequency front-end processor SIC1 GP2010, be connected to the pin 78 and 79 of hyperchannel correlator IC3 GP2021.
Radio-frequency front-end processor IC1, SIC1 all insert the reference crystal oscillator signal of 10M.
As Fig. 5, shown in Figure 6, the model of hyperchannel correlator IC3 is GP2021, by pin 76,77,78,79 receive respectively from radio-frequency front-end processor IC1, the data of SIC1 output, these data are respectively through antenna correlator on it and following antenna correlator, handle direct projection and reflected signal respectively, and result is outputed to the data terminal of chip U2 by data line, after by U2 the sequential of hyperchannel correlator GP2021 output data being converted to the data identical with the U1 sequential, export to U1, the address bus V33CA2-A9 of hyperchannel correlator GP2021 links to each other with high speed processor U1 respectively, data bus V5GPSD0-D15, control line V33GPSWRITE1, V33GPSSEL1, V33GPSREAD1, GPSINT1 respectively with the data line of U2, control line connects.
As shown in Figure 6, the model of high speed processor U1 is TMS320C33, the V33RESET signal of the 7th pin output of its 127th pin receiving chip U6, finish resetting to U1, the 42nd pin of U1 output V33CSTRB signal connects the 6th pin with chip U6, the pilot lamp indicating circuit running status that the 8th pin by U6 connects.
In the present embodiment, used storer comprises 4 SRAM storer sram1-sram4 and a slice flash memory U7, wherein, each sheet SRAM storer comprises 16 address wires, 8 data lines and each control line, U1 is connected with the address wire of storer sram1-sram4 respectively by address wire V33CA0-V33CA16, and U1 is connected with the data line of sram1-sram4 by data line V33CD0-V33CD31, and U1 controls each storer sram1-sram4 by control line.
The address wire of flash memory U7, data line are connected with address wire, the data line of U1 respectively, and control line connects with the corresponding control line of chip U2.
In order to export through the signal that high speed processor U1 handles, also be provided with communication interface at the utility model, in the present embodiment, described communication interface is two RS232 serial communication interfaces, as Fig. 5, shown in Figure 7, high speed processor U1 output signal is through dual serial mouth TXA1, the RXA1 of hyperchannel correlator GP2021, and TXB1, RXB1 export, after level transferring chip IC6 conversion, export by interface J14, JP1.
For indicating status, come indicating status by LED in the present embodiment.As shown in Figure 7, LED1 indicates power supply, and when this device energized, LED1 lights; The LED2 indicating operating status; Whether the work of LED3 indication radio-frequency front-end processor IC1, SIC1 is normal, if normal, then this pilot lamp is bright.
The direct projection satellite-signal receives, amplifies through dextrorotation gps antenna 10, by input of SMA1 joint and radio-frequency front-end processor IC1, produces digital signal and outputs to hyperchannel correlator GP2021 through down coversion, filtering, A/D sampling back.Under the control of dsp processor, through the corresponding back clearing satellite navigation signals of handling.
Reflection GPS left-handed polarized wave signal receives, amplifies through left-handed gps antenna 20, sends into radio-frequency front-end processor SIC1 by the SMA2 joint, outputs to hyperchannel correlator GP2021 through down coversion, filtering, A/D sampling back output digital signal.Under DSP control, export the different chip delay of required different satellite-signals related power constantly.
The navigation signal that postpones the calculating of mapping receiver is exported by interface circuit with different chip delay related power constantly, handles back calculating Ocean Wind-field through certain inversion algorithm.
It should be noted that at last: above embodiment only in order to the explanation the utility model and and the described technical scheme of unrestricted the utility model; Therefore, although this instructions has been described in detail the utility model with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model; And all do not break away from the technical scheme and the improvement thereof of spirit and scope of the present utility model, and it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (8)
1, a kind of delay mapping receiver based on Global Positioning System (GPS), comprise dextrorotation gps antenna, radio-frequency front-end processor, high speed processor, interface circuit, it is characterized in that: also comprise left-handed gps antenna, hyperchannel correlator with floating-point operation ability; Wherein, dextrorotation gps antenna, left-handed gps antenna are connected with the hyperchannel correlator by the radio-frequency front-end processor respectively, and the hyperchannel correlator is connected with high speed processor by data line, control line respectively, and high speed processor is connected with interface circuit by its data line.
2, the delay mapping receiver based on Global Positioning System (GPS) according to claim 1, it is characterized in that: also comprise the storer that is used for canned data, it is connected with high speed processor by address wire, data line respectively.
3, the delay mapping receiver based on Global Positioning System (GPS) according to claim 2, it is characterized in that: described storer is the combination in any of EPROM or EEPROM or flash memory or above various storeies.
4, the delay mapping receiver based on Global Positioning System (GPS) according to claim 1 is characterized in that: also comprise the state indicating device that is used for indicating operating status.
5, the delay mapping receiver based on Global Positioning System (GPS) according to claim 4, it is characterized in that: described state indicating device is LED light or LCD display or its combination.
6, the delay mapping receiver based on Global Positioning System (GPS) according to claim 1 is characterized in that: described radio-frequency front-end processor is to be used to finish to the down coversion of gps signal and the standard module of A/D sampling.
7, the delay mapping receiver based on Global Positioning System (GPS) according to claim 1 is characterized in that: described high speed processor is to have the DSP of floating-point operation ability or based on the processor of ARM kernel or based on the processor of DSP and ARM dual core.
8, the delay mapping receiver based on Global Positioning System (GPS) according to claim 1, it is characterized in that: described interface circuit is RS232 interface circuit or usb circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420050636 CN2700895Y (en) | 2004-04-29 | 2004-04-29 | Delay mapping receiver based on global satellite positioning system |
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| CN 200420050636 CN2700895Y (en) | 2004-04-29 | 2004-04-29 | Delay mapping receiver based on global satellite positioning system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819276A (en) * | 2010-03-26 | 2010-09-01 | 东南大学 | GPS L1 signal intermediate frequency data acquisition system and method |
| CN101833090A (en) * | 2010-03-12 | 2010-09-15 | 中国科学院遥感应用研究所 | Airborne ocean microwave remote sensing system utilizing signal sources of global satellite positioning system |
| CN101846738A (en) * | 2010-04-09 | 2010-09-29 | 哈尔滨工程大学 | Visual element positioning method based on interface reflection polarity discrimination |
| CN101975959A (en) * | 2010-09-03 | 2011-02-16 | 北京航空航天大学 | Device for acquiring inversion significant wave height and relative elevation in delay mapping receiver |
| CN101571584B (en) * | 2009-06-15 | 2011-09-28 | 北京航空航天大学 | Configurable reflection signal power processing system |
| CN101303404B (en) * | 2007-05-11 | 2011-11-16 | 联发科技股份有限公司 | GNSS receiver and method thereof |
| CN102749067A (en) * | 2012-06-21 | 2012-10-24 | 北京航空航天大学 | Telemetering device for accurately inverting sea level elevation with self-adaptive multistage calculation |
| CN104678387A (en) * | 2015-02-11 | 2015-06-03 | 中国地质大学（北京） | GNSS-R-based real-time detection device for air flight targets and detection method thereof |
| CN104699219A (en) * | 2013-12-10 | 2015-06-10 | 联想(北京)有限公司 | Electronic equipment and information processing method |
| CN107272033A (en) * | 2017-05-27 | 2017-10-20 | 金华航大北斗应用技术有限公司 | A kind of random delay modeling method of the airborne reflected signal of Big Dipper MEO satellite |
| CN111337554A (en) * | 2020-03-13 | 2020-06-26 | 山东航向电子科技有限公司 | Multi-mode compatible GNSS-R soil humidity microwave remote sensing device and using method thereof |
| CN111999746A (en) * | 2020-07-14 | 2020-11-27 | 西安爱生无人机技术有限公司 | FPGA-based anti-interference method for GPS antenna of unmanned aerial vehicle |
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2004
- 2004-04-29 CN CN 200420050636 patent/CN2700895Y/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303404B (en) * | 2007-05-11 | 2011-11-16 | 联发科技股份有限公司 | GNSS receiver and method thereof |
| CN101571584B (en) * | 2009-06-15 | 2011-09-28 | 北京航空航天大学 | Configurable reflection signal power processing system |
| CN101833090A (en) * | 2010-03-12 | 2010-09-15 | 中国科学院遥感应用研究所 | Airborne ocean microwave remote sensing system utilizing signal sources of global satellite positioning system |
| CN101819276A (en) * | 2010-03-26 | 2010-09-01 | 东南大学 | GPS L1 signal intermediate frequency data acquisition system and method |
| CN101846738A (en) * | 2010-04-09 | 2010-09-29 | 哈尔滨工程大学 | Visual element positioning method based on interface reflection polarity discrimination |
| CN101975959A (en) * | 2010-09-03 | 2011-02-16 | 北京航空航天大学 | Device for acquiring inversion significant wave height and relative elevation in delay mapping receiver |
| CN101975959B (en) * | 2010-09-03 | 2012-07-25 | 北京航空航天大学 | Device for acquiring inversion significant wave height and relative elevation in delay mapping receiver |
| CN102749067A (en) * | 2012-06-21 | 2012-10-24 | 北京航空航天大学 | Telemetering device for accurately inverting sea level elevation with self-adaptive multistage calculation |
| CN104699219B (en) * | 2013-12-10 | 2020-06-23 | 联想(北京)有限公司 | Electronic equipment and information processing method |
| CN104699219A (en) * | 2013-12-10 | 2015-06-10 | 联想(北京)有限公司 | Electronic equipment and information processing method |
| CN104678387A (en) * | 2015-02-11 | 2015-06-03 | 中国地质大学（北京） | GNSS-R-based real-time detection device for air flight targets and detection method thereof |
| CN107272033A (en) * | 2017-05-27 | 2017-10-20 | 金华航大北斗应用技术有限公司 | A kind of random delay modeling method of the airborne reflected signal of Big Dipper MEO satellite |
| CN107272033B (en) * | 2017-05-27 | 2019-07-02 | 金华航大北斗应用技术有限公司 | A kind of random delay modeling method of the airborne reflection signal of Beidou MEO satellite |
| CN111337554A (en) * | 2020-03-13 | 2020-06-26 | 山东航向电子科技有限公司 | Multi-mode compatible GNSS-R soil humidity microwave remote sensing device and using method thereof |
| CN111999746A (en) * | 2020-07-14 | 2020-11-27 | 西安爱生无人机技术有限公司 | FPGA-based anti-interference method for GPS antenna of unmanned aerial vehicle |
| CN111999746B (en) * | 2020-07-14 | 2024-04-12 | 西安爱生无人机技术有限公司 | Anti-interference method for unmanned aerial vehicle GPS antenna based on FPGA |
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