阅读说明：本技术 一种gps接收机 (A kind of GPS receiver ) 是由 杨发权 谭海曙 王东 肖永豪 陈建文 牛菓 于 2019-09-02 设计创作，主要内容包括：本发明公开了一种GPS接收机,涉及GPS技术领域。本发明包括射频前端电路、基带处理电路和电源管理器,射频前端电路向基带处理电路发发送数字中频信号,基带处理电路控制电源管理器,电源管理器分别为射频前端电路和基带处理电路提供电能。本发明通过采用射频电路、电源管理器、基带处理电路、其中包括如低噪声放大器、两级下变频器、增益控制放大器、AGC电路、频率合成器等器件,能够兼容各种星基导航系统的接收机,高灵敏度室内定位,与移动通信和手持设备的集成、抗干扰能力强、功耗低、尺寸小以及降低成本。(The invention discloses a kind of GPS receiver, are related to GPS technology field.The present invention includes RF front-end circuit, baseband processing circuitry and power supervisor, RF front-end circuit sends digital medium-frequency signal to baseband processing circuitry, baseband processing circuitry controls power supervisor, and power supervisor is respectively that RF front-end circuit and baseband processing circuitry provide electric energy.The present invention by using radio circuit, power supervisor, baseband processing circuitry, including devices such as such as low-noise amplifier, two-stage low-converter, gain-controlled amplifier, agc circuit, frequency synthesizers, the receiver of various satellite based navigational systems can be compatible with, highly sensitive indoor positioning, with mobile communication and handheld device it is integrated, strong antijamming capability, low in energy consumption, size is small and reduces cost.)

1. a kind of GPS receiver, including RF front-end circuit, baseband processing circuitry and power supervisor, it is characterised in that: described RF front-end circuit and baseband processing circuitry are communicated to connect by digital medium-frequency signal；The power supervisor is respectively and before radio frequency Terminal circuit and baseband processor are electrically connected, and the power supervisor is that RF front-end circuit and baseband processing circuitry are powered, institute State baseband processing circuitry control power supervisor；

The RF front-end circuit includes antennal interface, radio-frequency front-end processor, AGC control loop, frequency synthesis control loop With several outer members；

Wherein, the antennal interface includes antenna；The radio-frequency front-end processor includes low-noise amplifier, two-stage down coversion Device, variable gain amplifier, voltage controlled oscillator, frequency synthesizer and phase-locked loop circuit, the antenna and low-noise amplifier connect Connect, the low-noise amplifier is connect with variable gain amplifier and voltage controlled oscillator respectively with two-stage low-converter, it is described can Variable-gain amplifier is connect with AGC control loop and baseband processing circuitry respectively, and the frequency synthesizer is put with variable gain Big device connection, the phase-locked loop circuit are connect by voltage controlled oscillator with two-stage low-converter；The antenna is defended what is be collected into Star signal is transferred to low-frequency noise amplifier, and the low-noise amplifier will be under the satellite signal transit to two-stage after filter and amplification In frequency converter, the satellite-signal received is switched to intermediate-freuqncy signal by microwave signal and is transferred to variable by the two-stage low-converter Gain amplifier, the variable gain amplifier further amplify satellite-signal, while the analog intermediate frequency of satellite-signal being believed Number being converted to digital medium-frequency signal is transferred to baseband processing circuitry, and the voltage controlled oscillator sends and controls to two-stage low-converter Product moment sub-signal, the frequency synthesizer to variable gain amplifier provide frequency reference signal, the phase-locked loop circuit according to External clock adjusts local crystal oscillator clock and yearns for phase；Wherein, the agc circuit control loop includes agc circuit, the AGC Circuit is connect with variable gain amplifier and two-stage low-converter respectively, and the agc circuit receives variable gain amplifier signal And it is exported according to Signal Regulation two-stage low-converter signal；

The baseband processing circuitry includes microprocessor, the microprocessor respectively with variable gain amplifier and power management Device connection.

2. a kind of GPS receiver according to claim 1, which is characterized in that the microprocessor is that GP4020 controls core Piece.

3. a kind of GPS receiver according to claim 1, which is characterized in that the power supervisor includes power management IC and power supply, the power management IC are electrically connected with the power supply, the power management IC control power supply output.

Technical field

The invention belongs to GPS technology fields, more particularly to a kind of GPS receiver.

Background technique

GPS (global positioning system) can provide three-dimensional velocity, real-time three-dimensional position and high-precision temporal information, with complete The distinguishing features such as weather, high-precision, automation, high efficiency and its unique location navigation, time service calibrating frequency, accurate measurement etc. are more The power of aspect keeps its purposes more and more extensive, and now, the GPS system in the U.S., WAAS system, LAAS system, covering are complete The DGPS system in ball coastline, the CLONASS system of Russia, the Galileo system of European Union and the dipper system of China are all Representative satellite based navigational system.

Global positioning system passes through nearly research and development in 50 years, has tended to be practical, has formd satellite navigation industrial chain；Mesh Before, the application of satellite navigation spread military affairs, navigation, aviation, measurement, traffic, exploration etc. almost all with position, speed, In time related mankind's activity, while various global positioning systems continue to develop, GPS user end equipment is also at constantly Among upgrading and development.In the U.S. after publication stops SA policy, the dynamic locating accuracy of GPS receiver has obtained very big It improves, application range is also increasingly wider.

For GPS receiver just towards trend development small in size, light-weight, low in energy consumption, easy to carry, this is hand-held GPS The realization of position indicator is laid a good foundation, and it is cheap that following communication mode will tend to communication cost, wide coverage, realize it is simple Advantage, as receiver circuit from the point of view of the structure of receiver, as (number is believed by VLSI (super large-scale integration) and DSP Number processing) technology development, single channel sequential-type, time division multiplexing formula receiver are using the parallel of DSP module already Multichannel receiver is replaced, and the attainable port number of institute and equivalent correlator number are continuously increased, and integrated level is higher embedded The GPS baseband processor chip of MPU/MCU becomes mainstream, and the GPS receiver that radio frequency and digital processing integrate is had Wide application prospect.

Summary of the invention

The purpose of the present invention is to provide a kind of GPS receiver, improve anti-interference ability, reduce production cost.

In order to solve the above technical problems, the present invention is achieved by the following technical solutions:

The present invention is a kind of GPS receiver, including RF front-end circuit, baseband processing circuitry and power supervisor are described RF front-end circuit and baseband processing circuitry are communicated to connect by digital medium-frequency signal；The power supervisor is respectively and before radio frequency Terminal circuit and baseband processor are electrically connected, and the power supervisor is that RF front-end circuit and baseband processing circuitry are powered, institute State baseband processing circuitry control power supervisor；

The RF front-end circuit includes antennal interface, radio-frequency front-end processor, AGC control loop, frequency synthesis control Loop and several outer members；

Wherein, the antennal interface includes antenna；The radio-frequency front-end processor includes becoming under low-noise amplifier, two-stage Frequency device, variable gain amplifier, voltage controlled oscillator, frequency synthesizer and phase-locked loop circuit, the antenna and low-noise amplifier Connection, the low-noise amplifier is connect with variable gain amplifier and voltage controlled oscillator respectively with two-stage low-converter, described Variable gain amplifier is connect with AGC control loop and baseband processing circuitry respectively, the frequency synthesizer and variable gain Amplifier connection, the phase-locked loop circuit are connect by voltage controlled oscillator with two-stage low-converter；The antenna will be collected into Satellite signal transit gives low-frequency noise amplifier, and the low-noise amplifier is by the satellite signal transit after filter and amplification to two-stage In low-converter, the satellite-signal received is switched to intermediate-freuqncy signal by microwave signal with the two-stage low-converter and be transferred to can Variable-gain amplifier, the variable gain amplifier further amplify satellite-signal, while by the analog intermediate frequency of satellite-signal Signal is converted to digital medium-frequency signal and is transferred to baseband processing circuitry, and the voltage controlled oscillator sends and controls to two-stage low-converter Product moment sub-signal processed, the frequency synthesizer provide frequency reference signal, the phase-locked loop circuit root to variable gain amplifier Local crystal oscillator clock, which is adjusted, according to external clock yearns for phase；

Wherein, the agc circuit control loop includes agc circuit, the agc circuit respectively with variable gain amplifier and The connection of two-stage low-converter, the agc circuit receive variable gain amplifier signal and according to Signal Regulation two-stage low-converters Signal output；

The baseband processing circuitry includes microprocessor, the microprocessor respectively with variable gain amplifier and power supply Manager connection.

Preferably, the microprocessor is that GP4020 controls chip.

Preferably, the power supervisor includes power management IC and power supply, and the power management IC electrically connects with power supply It connects, the power management IC control power supply output.

The invention has the following advantages:

The present invention by using radio circuit, power supervisor, baseband processing circuitry, including such as low noise amplification The devices such as device, two-stage low-converter, gain-controlled amplifier, agc circuit, frequency synthesizer, can be compatible with various satellite-based navigations The receiver of system, highly sensitive indoor positioning, with the integrated of mobile communication and handheld device, strong antijamming capability, it is low in energy consumption, Size is small and reduces cost.

Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.

Detailed description of the invention

In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached Figure.

Fig. 1 is a kind of GPS receiver structural block diagram of the invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other Embodiment shall fall within the protection scope of the present invention.