CN104698476A - GPS satellite navigation receiver based on three-level mixing structure - Google Patents
GPS satellite navigation receiver based on three-level mixing structure Download PDFInfo
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- CN104698476A CN104698476A CN201510155819.XA CN201510155819A CN104698476A CN 104698476 A CN104698476 A CN 104698476A CN 201510155819 A CN201510155819 A CN 201510155819A CN 104698476 A CN104698476 A CN 104698476A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention relates to a GPS satellite navigation receiver based on a three-level mixing structure. The receiver comprises an antenna, a radio frequency processing module, an A/D converting module, a base-band signal processing module and an information processing module. The radio frequency processing module collects signals of the antenna. The signals are subjected to frequency conversion amplifying through the radio frequency processing module and then are sent to the A/D converting module for analog-digital conversion into digital intermediate frequency signals. The base-band signal processing module carries out processing analyzing on the digital intermediate frequency signals and outputs navigation original observed quantity on a signal processing unit. The information processing module is in charge of PVT resolving, and the geographic position of the receiver, speed and satellite time are obtained by resolving. Circuit working frequency is wide, working voltage is low, compatibility is high, the integration degree is high, appearance size is small, in order to further reduce periphery components, a sound surface filter S(AW) high in cost is removed, and accordingly the cost of a whole machine is lowered.
Description
Technical field
The present invention relates to satellite-based navigation technical field, particularly relate to a kind of gps satellite navigation neceiver based on three grades of mixing structures.
Background technology
Satellite navigation is based on navigational satellite system, and ground or user near the ground receive satellite navigation signals by satellite navigation receiver, by a series of process, finally completes navigator fix, tests the speed, the system of the function such as time service.At present, the satellite navigation system that the whole world is being run or tentatively run has GPS (the Global Positioning System) system of the U.S., China's dipper system is estimated to build up at the year two thousand twenty, and China is called that after a U.S. and Russia third place in the world country has the country of perfect, an overall satellite navigation system.The following GAULEO system also having Europe.When multisystem is run simultaneously, the satellite navigation receiver for triangular web can not meet actual needs, and the receiver of development multisystem compatibility has become the trend of present satellites navigation neceiver technical development.Along with the progress of Satellite Navigation Technique and the development construction of satellite navigation system, the application of satellite navigation constantly expands, joining the army, it is civilian to use, the existence that daily life has it is measured from specialty, the performance of widespread use to the various aspects of receiver of satellite navigation receiver proposes new requirement and requires also different according to the environment difference of application, generally speaking have following some: 1) from the angle of hardware design and receiver cost, require receiver compact in size, low-power consumption, low cost; 2) from locating speed aspect, require quick position, especially quick first location, requires that real time data upgrades simultaneously; 3) high-precision position, speed, time estimation and require high stability is required positioning precision; 4) the higher dynamic change under application-specific scene can be born from dynamic requirement.Above requirement is that the technical development of satellite navigation receiver specifies road, promoting that receiver technology constantly advances, in the technology of satellite navigation receiver, base band signal process technology is the key link, its technical merit almost determines the height of whole receiver performance, never interrupt the research of receiver base band signal process technology both at home and abroad, on the whole, domestic level is generally lower than external level.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of gps satellite navigation neceiver based on three grades of mixing structures, by for reducing peripheral cell further, eliminating the SAW (Surface Acoustic Wave) filter S (AW) of high cost, to reduce the cost of complete machine.
Technical scheme of the present invention is: a kind of gps satellite navigation neceiver based on three grades of mixing structures, this receiver comprises antenna, radio frequency processing module, A/D modular converter, baseband signal processing module and message processing module, the signal of described radio frequency processing module acquires antenna, signal is sent to A/D modular converter after the frequency conversion of radio frequency processing module is amplified to carry out analog to digital conversion and becomes digital medium-frequency signal, baseband signal processing module carries out Treatment Analysis to digital medium-frequency signal, the original observed quantity of navigation is exported to signal processing unit, signal processing module is responsible for PVT and is resolved, calculate the geographic position residing for receiver, speed and satellite time.Described radio frequency processing module comprises low noise amplifier, frequency mixer, phase-lock frequency synthesizer and automatic gain amplifier.Described frequency mixer comprises the first frequency mixer, and frequency mixer, three-mixer, the first local oscillator that the signal that antenna gathers produces with phase-lock frequency synthesizer after low noise amplifier amplifies is by the first frequency mixer mixing, its variance signal is selected as the first intermediate-freuqncy signal by wave filter, the second local oscillator produced with phase-lock frequency synthesizer after amplifier amplifies is by the second frequency mixer mixing, its variance signal is selected as the second intermediate-freuqncy signal by wave filter, the 3rd local oscillator produced with phase-lock frequency synthesizer after automatic gain amplifier amplifies is by three-mixer mixing, the 3rd intermediate-freuqncy signal is selected by low-pass filter, output valve A/D modular converter after automatic gain amplifier amplifies.Described phase-lock frequency synthesizer comprises reference oscillator, parametric frequency divider, phase frequency detector, charge pump, dual-mode frequency divider, variable frequency divider, loop filter, voltage controlled oscillator.The signal that described reference oscillator exports is sent to parametric frequency divider, after the signal that parametric frequency divider draws is sent to phase frequency detector, exported by charge pump, loop filter and voltage controlled oscillator successively, voltage controlled oscillator feeds back to phase frequency detector through variable frequency divider.It is characterized in that, described phase frequency detector, charge pump, dual-mode frequency divider, variable frequency divider, loop filter, voltage controlled oscillator composition interlocked rings road.Described interlocking loop is according to the phase differential between frequency input signal and voltage controlled oscillator output signal, and output error control voltage, regulates the frequency of voltage controlled oscillator and the same frequency of input signal.When the frequency of voltage controlled oscillator and input signal are with time frequently, interlocking loop enters lock-out state.This receiver also comprises filtering circuit mutual with radio frequency processing module.This receiver also comprises the external interface be connected with message processing module.
The present invention has following good effect: this circuit work frequency is wide, operating voltage is low, compatibility is strong, integrated level is high, overall volume is little.For reducing peripheral cell further, eliminate the SAW (Surface Acoustic Wave) filter S (AW) of high cost, to reduce the cost of complete machine.The developing direction of satellite navigation receiver RF circuit adopts image-reject mixer to replace traditional mixer architecture and adopts the circuit framework of Direct Conversion.
Accompanying drawing explanation
Fig. 1 is the system construction drawing of the specific embodiment of the invention;
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is as the effect of the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part and principle of work, manufacturing process and operation using method etc., be described in further detail, have more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present invention, technical scheme.
As shown in Figure 1, a kind of gps satellite navigation neceiver based on three grades of mixing structures, this receiver comprises antenna, radio frequency processing module, A/D modular converter, baseband signal processing module and message processing module, the signal of described radio frequency processing module acquires antenna, signal is sent to A/D modular converter after the frequency conversion of radio frequency processing module is amplified to carry out analog to digital conversion and becomes digital medium-frequency signal, baseband signal processing module carries out Treatment Analysis to digital medium-frequency signal, the original observed quantity of navigation is exported to signal processing unit, signal processing module is responsible for PVT and is resolved, calculate the geographic position residing for receiver, speed and satellite time.Described radio frequency processing module comprises low noise amplifier, frequency mixer, phase-lock frequency synthesizer and automatic gain amplifier.Described frequency mixer comprises the first frequency mixer, second frequency mixer, three-mixer, the first local oscillator that the signal that antenna gathers produces with phase-lock frequency synthesizer after low noise amplifier amplifies is by the first frequency mixer mixing, its variance signal is selected as the first intermediate-freuqncy signal by wave filter, the second local oscillator produced with phase-lock frequency synthesizer after amplifier amplifies is by the second frequency mixer mixing, its variance signal is selected as the second intermediate-freuqncy signal by wave filter, the 3rd local oscillator produced with phase-lock frequency synthesizer after automatic gain amplifier amplifies is by three-mixer mixing, the 3rd intermediate-freuqncy signal is selected by low-pass filter, output valve A/D modular converter after automatic gain amplifier amplifies.Described phase-lock frequency synthesizer comprises reference oscillator, parametric frequency divider, phase frequency detector, charge pump, dual-mode frequency divider, variable frequency divider, loop filter, voltage controlled oscillator.The signal that described reference oscillator exports is sent to parametric frequency divider, after the signal that parametric frequency divider draws is sent to phase frequency detector, exported by charge pump, loop filter and voltage controlled oscillator successively, voltage controlled oscillator feeds back to phase frequency detector through variable frequency divider.It is characterized in that, described phase frequency detector, charge pump, dual-mode frequency divider, variable frequency divider, loop filter, voltage controlled oscillator composition interlocked rings road.Described interlocking loop is according to the phase differential between frequency input signal and voltage controlled oscillator output signal, and output error control voltage, regulates the frequency of voltage controlled oscillator and the same frequency of input signal.When the frequency of voltage controlled oscillator and input signal are with time frequently, interlocking loop enters lock-out state.This receiver also comprises filtering circuit mutual with radio frequency processing module.This receiver also comprises the external interface be connected with message processing module.
The present invention adopts Top-Down Design, metal line ensures distance between centers of tracks, wiring adopts deep trench isolation technology, reduce the crosstalk between interference and signal, Anneta module: comprise built-in aerial and external antenna interface, use the active antenna matched with complete machine structure parts, carry low noise amplifier and wave filter, receiving satellite signal, exports after amplification filtering, is assisted realize good EMC Design by structural design; Radio-frequency module: radiofrequency signal is carried out down coversion, power amplification, exporting analog intermediate frequency signal, for front end inner antenna low noise amplifier provides feed, take temperature compensating crystal oscillator as base frequency clock, by inner frequency multiplication for ADC provides sampling clock, for baseband processing module provides work clock; Major parameter is as follows: supply voltage: 3.3V; Static current of lcd: 150mA; LNA noise figure: 2.5dB; Receiving sensitivity :-130dBm; AGC dynamic range: 70dB; Incoming frequency: 1575.42-1610MH; First vibration frequency: 1400MH:; Second local frequency: 140MH; 3rd local frequency: 31.1MH; Export IF-FRE: 1.8 ~ 10MHz; Communication protocol: defer to GPS/GLONASS communication protocol; Compatible: GPS/GLONASS global position system.If sampling module: use ADC to sample to analog if signal, export digital medium-frequency signal; Baseband signal processing module: the baseband processing module of this navigation neceiver adopts standard interface module BP2007, realizes the functions such as relevant treatment, loop control, text extraction; Message processing module: in this navigation neceiver, employs one piece of MCU, and while realizing the function such as user coordinates display, hardware platform control under WinCE operating system, the PVT coordinating BP2007 module to realize user resolves; Reference clock and punctual module: the TCXO and the high precision RTC that comprise high stability, the former provides radio-frequency module benchmark 10MHz clock, and the latter provides the RTC time of high stability; Power module: the power-supply system based on lithium battery, comprises the charging module of lithium battery itself, and the power module of the power supply chip composition of multistage point of function of rear class.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (10)
1. the gps satellite navigation neceiver based on three grades of mixing structures, it is characterized in that, this receiver comprises antenna, radio frequency processing module, A/D modular converter, baseband signal processing module and message processing module, the signal of described radio frequency processing module acquires antenna, signal is sent to A/D modular converter after the frequency conversion of radio frequency processing module is amplified to carry out analog to digital conversion and becomes digital medium-frequency signal, baseband signal processing module carries out Treatment Analysis to digital medium-frequency signal, the original observed quantity of navigation is exported to signal processing unit, signal processing module is responsible for PVT and is resolved, calculate the geographic position residing for receiver, speed and satellite time.
2. the gps satellite navigation neceiver based on three grades of mixing structures according to claim 1, is characterized in that, described radio frequency processing module comprises low noise amplifier, frequency mixer, phase-lock frequency synthesizer and automatic gain amplifier.
3. the gps satellite navigation neceiver based on three grades of mixing structures according to claim 2, it is characterized in that, described frequency mixer comprises the first frequency mixer, and frequency mixer, three-mixer, the first local oscillator that the signal that antenna gathers produces with phase-lock frequency synthesizer after low noise amplifier amplifies is by the first frequency mixer mixing, its variance signal is selected as the first intermediate-freuqncy signal by wave filter, the second local oscillator produced with phase-lock frequency synthesizer after amplifier amplifies is by the second frequency mixer mixing, its variance signal is selected as the second intermediate-freuqncy signal by wave filter, the 3rd local oscillator produced with phase-lock frequency synthesizer after automatic gain amplifier amplifies is by three-mixer mixing, the 3rd intermediate-freuqncy signal is selected by low-pass filter, output valve A/D modular converter after automatic gain amplifier amplifies.
4. the gps satellite navigation neceiver based on three grades of mixing structures according to claim 2, it is characterized in that, described phase-lock frequency synthesizer comprises reference oscillator, parametric frequency divider, phase frequency detector, charge pump, dual-mode frequency divider, variable frequency divider, loop filter, voltage controlled oscillator.
5. the gps satellite navigation neceiver based on three grades of mixing structures according to claim 4, it is characterized in that, the signal that described reference oscillator exports is sent to parametric frequency divider, after the signal that parametric frequency divider draws is sent to phase frequency detector, exported by charge pump, loop filter and voltage controlled oscillator successively, voltage controlled oscillator feeds back to phase frequency detector through variable frequency divider.
6. the gps satellite navigation neceiver based on three grades of mixing structures according to claim 4, is characterized in that, described phase frequency detector, charge pump, dual-mode frequency divider, variable frequency divider, loop filter, voltage controlled oscillator composition interlocked rings road.
7. the gps satellite navigation neceiver based on three grades of mixing structures according to claim 6, it is characterized in that, described interlocking loop is according to the phase differential between frequency input signal and voltage controlled oscillator output signal, output error control voltage, regulates the frequency of voltage controlled oscillator and the same frequency of input signal.
8. the gps satellite navigation neceiver based on three grades of mixing structures according to claim 7, is characterized in that, when the frequency of voltage controlled oscillator and input signal are with time frequently, interlocking loop enters lock-out state.
9. the gps satellite navigation neceiver based on three grades of mixing structures according to claim 2, is characterized in that, this receiver also comprises filtering circuit mutual with radio frequency processing module.
10. the gps satellite navigation neceiver based on three grades of mixing structures according to claim 2, it is characterized in that, this receiver also comprises the external interface be connected with message processing module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510155819.XA CN104698476A (en) | 2015-04-02 | 2015-04-02 | GPS satellite navigation receiver based on three-level mixing structure |
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| CN201510155819.XA CN104698476A (en) | 2015-04-02 | 2015-04-02 | GPS satellite navigation receiver based on three-level mixing structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866799A (en) * | 2016-06-08 | 2016-08-17 | 成都谷辘信息技术有限公司 | GPS (global positioning system) receiving device applied to missile-borne environment |
| CN105866801A (en) * | 2016-06-08 | 2016-08-17 | 成都谷辘信息技术有限公司 | GPS (global positioning system) receiving unit applied to missile-borne environment |
| CN106054222A (en) * | 2016-06-08 | 2016-10-26 | 成都谷辘信息技术有限公司 | GPS receiver applied to missile-borne environment |
| CN106227031A (en) * | 2016-05-25 | 2016-12-14 | 广州市国飞信息科技有限公司 | A kind of receiver module and single-chip realize satellite and tame and punctual method |
| CN108718394A (en) * | 2018-08-13 | 2018-10-30 | 珠海市普斯赛特科技有限公司 | A kind of adjustable frequency demultiplier of the more stars of KU wave bands list feed |
| CN114844619A (en) * | 2022-05-13 | 2022-08-02 | 南京尤尼泰信息科技有限公司 | Frequency signal generating device and method based on satellite navigation signal |
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| CN201008144Y (en) * | 2006-12-31 | 2008-01-16 | 中国科学院半导体研究所 | Phase lock loop circuit of charge pump |
| CN203773056U (en) * | 2014-04-10 | 2014-08-13 | 武汉大学 | GPS navigation telegraph text acquisition device |
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Patent Citations (2)
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| CN201008144Y (en) * | 2006-12-31 | 2008-01-16 | 中国科学院半导体研究所 | Phase lock loop circuit of charge pump |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106227031A (en) * | 2016-05-25 | 2016-12-14 | 广州市国飞信息科技有限公司 | A kind of receiver module and single-chip realize satellite and tame and punctual method |
| CN105866799A (en) * | 2016-06-08 | 2016-08-17 | 成都谷辘信息技术有限公司 | GPS (global positioning system) receiving device applied to missile-borne environment |
| CN105866801A (en) * | 2016-06-08 | 2016-08-17 | 成都谷辘信息技术有限公司 | GPS (global positioning system) receiving unit applied to missile-borne environment |
| CN106054222A (en) * | 2016-06-08 | 2016-10-26 | 成都谷辘信息技术有限公司 | GPS receiver applied to missile-borne environment |
| CN108718394A (en) * | 2018-08-13 | 2018-10-30 | 珠海市普斯赛特科技有限公司 | A kind of adjustable frequency demultiplier of the more stars of KU wave bands list feed |
| CN114844619A (en) * | 2022-05-13 | 2022-08-02 | 南京尤尼泰信息科技有限公司 | Frequency signal generating device and method based on satellite navigation signal |
| CN114844619B (en) * | 2022-05-13 | 2023-12-22 | 南京尤尼泰信息科技有限公司 | Frequency signal generating device and method based on satellite navigation signal |
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