CN111308505B - Satellite signal forwarding system and method - Google Patents
Satellite signal forwarding system and method Download PDFInfo
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- CN111308505B CN111308505B CN201910112387.2A CN201910112387A CN111308505B CN 111308505 B CN111308505 B CN 111308505B CN 201910112387 A CN201910112387 A CN 201910112387A CN 111308505 B CN111308505 B CN 111308505B
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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
- G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
- G01S19/10—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals
- G01S19/11—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters
Abstract
The application relates to a satellite signal forwarding system and a method; the satellite signal forwarding system comprises a first signal isolation module, a second signal isolation module, an indoor antenna, an outdoor antenna, a downlink satellite signal forwarding module and an uplink satellite signal processing module; the indoor antenna is used for receiving a first uplink satellite signal transmitted by the navigation equipment and transmitting the first uplink satellite signal to the uplink satellite signal processing module through the first signal isolation module; the uplink satellite signal processing module processes the first uplink satellite signal to obtain a second uplink satellite signal, and transmits the second uplink satellite signal to the outdoor antenna through the second signal isolation module; the outdoor antenna transmits a second uplink satellite signal. According to the method and the device, the uplink satellite signals and the downlink satellite signals can be simultaneously forwarded, so that multi-system combined navigation can be realized, and the functions of a satellite signal forwarding system are enriched; meanwhile, the reliability of the system is improved by isolating the signals.
Description
Technical Field
The present application relates to the field of satellite navigation technologies, and in particular, to a satellite signal forwarding system and method.
Background
With the rapid development of satellite positioning and satellite navigation technologies, the production, test, maintenance and other processes of navigation equipment all depend on the coverage of multi-frequency satellite signals. In order to ensure that the navigation device can receive high-quality satellite signals, the satellite signals need to be forwarded through the multi-frequency signal forwarding device, that is, the satellite signal forwarding system can forward satellite broadcast signals of different frequency bands of a plurality of satellite navigation systems.
However, in the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the existing satellite signal forwarding system can only forward satellite signals from navigation satellites to navigation equipment, and is single in function.
Disclosure of Invention
Accordingly, it is necessary to provide a satellite signal forwarding system and a method capable of simultaneously transmitting and receiving satellite signals, in order to solve the technical problem of single function of the conventional satellite signal forwarding system.
In order to achieve the above object, in one aspect, an embodiment of the present application provides a satellite signal forwarding system, which includes a first signal isolation module, a second signal isolation module, an indoor antenna, an outdoor antenna, a downlink satellite signal forwarding module, and an uplink satellite signal processing module;
the first signal isolation module is respectively connected with the indoor antenna, the downlink satellite signal forwarding module and the uplink satellite signal processing module; the second signal isolation module is respectively connected with the outdoor antenna, the downlink satellite signal forwarding module and the uplink satellite signal processing module;
the indoor antenna is used for receiving a first uplink satellite signal transmitted by the navigation equipment and transmitting the first uplink satellite signal to the uplink satellite signal processing module through the first signal isolation module; the uplink satellite signal processing module processes the first uplink satellite signal to obtain a second uplink satellite signal, and transmits the second uplink satellite signal to the outdoor antenna through the second signal isolation module; the outdoor antenna transmits a second uplink satellite signal.
In one embodiment, the outdoor antenna receives a first downlink satellite signal transmitted by a navigation satellite, and transmits the first downlink satellite signal to the downlink satellite signal forwarding module through the second signal isolation module;
the downlink satellite signal forwarding module carries out filtering amplification processing on the first downlink satellite signal to obtain a second downlink satellite signal, and the second downlink satellite signal is transmitted to the indoor antenna through the first signal isolation module; the indoor antenna transmits a second downlink satellite signal.
In one embodiment, the uplink satellite signal processing module comprises a first filtering and amplifying unit connected with the second signal isolation module; and the first filtering and amplifying unit is used for filtering and amplifying the first uplink satellite signal to obtain a second uplink satellite signal.
In one embodiment, the first filtering and amplifying unit includes a first amplifier, a second amplifier, a third amplifier, a first filter, and a second filter;
the first amplifier is respectively connected with the first signal isolation module and the first filter; the first filter is connected with the second amplifier; the second amplifier is connected with the third amplifier; the third amplifier is connected with the second filter; the second filter is connected with the second signal isolation module. In one embodiment, the uplink satellite signal processing module further comprises a preprocessing unit and an enabling control unit; the preprocessing unit is respectively connected with the first signal isolation module, the first filtering amplification unit and the enabling control unit; the enabling control unit is connected with the first filtering and amplifying unit;
the preprocessing unit carries out shunt processing on the received first uplink satellite signal to obtain a first uplink shunt signal and a second uplink shunt signal, and transmits the first uplink shunt signal to the first filtering and amplifying unit and transmits the second uplink shunt signal to the enabling control unit;
the enabling control unit controls the working state of the first filtering amplification unit according to the power of the second uplink shunt signal;
and the first filtering and amplifying unit is used for filtering and amplifying the first uplink shunt signal to obtain a second uplink satellite signal.
In one embodiment, the pre-processing unit comprises a third filter and a first splitter; the enabling control unit comprises a power detector, an operational amplifier comparator and a voltage stabilizing tube;
the third filter is respectively connected with the first signal isolation module and the first splitter; the first splitter is respectively connected with the first filtering and amplifying unit and the power detector; the power detector is connected with the operational amplifier comparator; the operational amplifier comparator is respectively connected with the first filtering and amplifying unit and the voltage stabilizing tube.
In one embodiment, the uplink satellite signal processing module further comprises a power control unit connected between the preprocessing unit and the first filtering and amplifying unit; the power control unit is connected with the enabling control unit;
the enabling control unit also transmits a power control signal to the power control unit according to the power of the second uplink shunt signal;
the power control unit performs attenuation processing on the first uplink shunt signal according to the power control signal to obtain an attenuation signal, and transmits the attenuation signal to the first filtering and amplifying unit;
and the first filtering and amplifying unit is used for filtering and amplifying the attenuated signal to obtain a second uplink satellite signal.
In one embodiment, the power control unit comprises a single chip microcomputer and an adjustable attenuator;
the single chip microcomputer is respectively connected with the enabling control unit and the adjustable attenuator; the adjustable attenuator is respectively connected with the preprocessing unit and the first filtering and amplifying unit.
In one embodiment, the downlink satellite signal forwarding module comprises a second splitter, a first combiner, a second filtering and amplifying unit, a third filtering and amplifying unit and a fourth filtering and amplifying unit;
the second splitter is respectively connected with the second signal isolation module, the second filtering and amplifying unit, the third filtering and amplifying unit and the fourth filtering and amplifying unit; the first combiner is respectively connected with the third filtering and amplifying unit, the fourth filtering and amplifying unit and the second combiner; the second combiner is respectively connected with the first signal isolation module and the second filtering amplification unit.
In one embodiment, the first signal isolation module and the second signal isolation module are duplexers.
On the other hand, the embodiment of the present application further provides a satellite signal forwarding method, including the following steps:
the indoor antenna is used for receiving a first uplink satellite signal transmitted by the navigation equipment and transmitting the first uplink satellite signal to the uplink satellite signal processing module through the first signal isolation module;
the uplink satellite signal processing module processes the first uplink satellite signal to obtain a second uplink satellite signal, and transmits the second uplink satellite signal to the outdoor antenna through the second signal isolation module;
the outdoor antenna transmits a second uplink satellite signal.
One of the above technical solutions has the following advantages and beneficial effects:
the uplink satellite signal transmitted by the navigation equipment is processed through the uplink satellite signal processing module, the processed uplink satellite signal is transmitted to the outdoor antenna through the second signal isolation module, and the uplink satellite signal transmitted by the navigation equipment is transmitted to the navigation satellite through the outdoor antenna; meanwhile, downlink satellite signals of different frequencies of a plurality of satellite navigation systems are received through the outdoor antenna and are forwarded by the downlink satellite signal forwarding module, so that the uplink satellite signals and the downlink satellite signals are simultaneously forwarded, multi-system combined navigation can be realized, and the functions of the satellite signal forwarding system are enriched; the first signal isolation module and the second signal isolation module are used for isolating the uplink satellite signals and the downlink satellite signals, and the reliability of the satellite signal forwarding system is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of a positioning process of a Beidou first generation navigation system;
FIG. 2 is a first schematic block diagram of a satellite signal repeating system in accordance with one embodiment;
FIG. 3 is a schematic diagram of a first filter amplifying unit according to an embodiment;
FIG. 4 is a block diagram of a first exemplary architecture of an uplink satellite signal processing module in accordance with one embodiment;
FIG. 5 is a schematic diagram of the configuration of the preprocessing unit and the enable control unit in one embodiment;
FIG. 6 is a block diagram of a second exemplary architecture of an uplink satellite signal processing module in accordance with one embodiment;
FIG. 7 is a diagram illustrating an exemplary power control unit;
FIG. 8 is a block diagram of a second exemplary architecture of a satellite signal forwarding system in one embodiment;
FIG. 9 is a schematic flow chart of a method for repeating satellite signals according to an embodiment;
fig. 10 is a block diagram showing the structure of a satellite signal repeater according to an embodiment;
FIG. 11 is a diagram illustrating an internal structure of a computer device in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Currently, common Navigation systems include GPS (Global Positioning System), BDS (BeiDou Navigation Satellite System, china BeiDou Satellite Navigation System), GLONASS (GLONASS Satellite Navigation System), and GALILEO (GALILEO Satellite Navigation System). As shown in fig. 1, the positioning step of the first generation beidou navigation system includes:
step S102, the ground central station transmits ranging signals to two navigation satellites in the synchronous orbit, and the two navigation satellites respectively amplify the received ranging signals and relay the ranging signals to a service area.
Step S104, the navigation equipment transmits a response signal to the navigation satellite when receiving the ranging signal forwarded by the navigation satellite; the navigation satellite transfers the response signal and transmits the response signal to the ground central station.
The navigation equipment is a user machine located in a service area.
And step S106, when the ground central station receives the response signal, calculating the distance between the navigation equipment and the navigation satellite according to the transmission time of the signal.
Specifically, when the ground central station receives the response signal, the transmission time of the ranging signal passing through the ground central station, the navigation satellite and the ground central station is calculated according to the time delay of the signal, and the distance between the ground central station and the navigation satellite and the navigation device is obtained according to the transmission time. Meanwhile, the distance between the ground central station and the navigation satellite is known, so that the distance between the navigation equipment and the navigation satellite can be calculated.
And step S108, obtaining the coordinates of the navigation equipment according to the distance data between the navigation equipment and two navigation satellites positioned in the synchronous orbit.
Specifically, according to step S106, distance data between the navigation device and two navigation satellites located in the synchronous orbit are obtained, and a search is performed on a digital map stored in the ground central station to find a point that meets the distance condition, where the coordinates of the point are the coordinates of the navigation device.
And step S110, the ground central station transmits the coordinates of the navigation equipment to the navigation equipment through the navigation satellite.
Specifically, the ground central station transmits coordinate data to the navigation device via one of two navigation satellites located in a synchronous orbit.
In step S112, the navigation device transmits a receipt to the ground central station via the navigation satellite when receiving the coordinates, so as to end the positioning.
Specifically, when the navigation device receives the coordinates, it sends a receipt to the ground central station via the navigation satellite, and ends a positioning operation.
Through the steps, the Beidou first-generation navigation system is an active navigation system, in the navigation process, the navigation equipment not only needs to receive navigation satellite signals transmitted by the navigation satellite, but also needs to transmit signals to the navigation satellite, the transmitted signals are transmitted to the ground central station through the forwarding of the navigation satellite, and the ground central station sends back position information (namely coordinate data) to the navigation equipment.
However, the conventional satellite signal forwarding system generally can only forward satellite signals from a navigation satellite to navigation equipment, cannot transmit indoor signals to the navigation satellite for communication, has a single function, and cannot be compatible with the first generation of beidou and other navigation systems. The signal of various satellite navigation systems can be simultaneously forwarded by the method, and the signals comprise a first generation Beidou receiving frequency band and a transmitting frequency band and satellite signals of other satellite navigation systems.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, as shown in fig. 2, a satellite signal forwarding system is provided, which includes a first signal isolation module 210, a second signal isolation module 220, an indoor antenna 230, an outdoor antenna 240, a downlink satellite signal forwarding module 250, and an uplink satellite signal processing module 260;
the first signal isolation module 210 is respectively connected to the indoor antenna 230, the downlink satellite signal forwarding module 250 and the uplink satellite signal processing module 260; the second signal isolation module 220 is respectively connected to the outdoor antenna 240, the downlink satellite signal forwarding module 250 and the uplink satellite signal processing module 260;
the indoor antenna 230 is configured to receive a first uplink satellite signal transmitted by the navigation device, and transmit the first uplink satellite signal to the uplink satellite signal processing module 260 through the first signal isolation module 210; the uplink satellite signal processing module 260 processes the first uplink satellite signal to obtain a second uplink satellite signal, and transmits the second uplink satellite signal to the outdoor antenna 240 through the second signal isolation module 220; the outdoor antenna 240 transmits a second uplink satellite signal.
Specifically, the outdoor antenna can be used for transmitting an uplink satellite signal and receiving a downlink satellite signal transmitted by a navigation satellite, and can be connected with the second signal isolation module through a cable; the indoor antenna can be used for receiving uplink satellite signals transmitted by the navigation equipment and transmitting downlink satellite signals, and can be connected with the first signal isolation module through a cable; the indoor antenna and the outdoor antenna can be integrated antennas for receiving and transmitting.
When the navigation equipment needs to transmit an uplink satellite signal to a navigation satellite, the first uplink satellite signal transmitted by the navigation equipment is received through the indoor antenna, and the uplink satellite signal and the downlink satellite signal are isolated through the first signal isolation module, so that the receiving and transmitting can work normally at the same time. The uplink satellite signal processing module can process the first uplink satellite signal according to actual conditions and design requirements to obtain a second uplink satellite signal, so that the navigation device and the navigation satellite can perform normal communication, for example, the uplink satellite signal processing module can perform amplification filtering processing, branch-and-branch processing, power control processing and the like on the first uplink satellite signal. The second signal isolation module isolates the uplink satellite signal from the downlink satellite signal, transmits the second uplink satellite signal to the outdoor antenna, and transmits the second uplink satellite signal by using the outdoor antenna, so that the uplink satellite signal transmitted indoors is transmitted to the navigation satellite, and uplink communication between the navigation equipment and the navigation satellite is realized.
Furthermore, when the navigation satellite transmits the downlink satellite signal to the navigation equipment, the outdoor antenna receives the downlink satellite signal transmitted by the navigation satellite, and the downlink satellite signal is forwarded through the downlink satellite signal forwarding module and the indoor antenna, so that the downlink satellite signal can be forwarded under the condition that the signal is not deteriorated. The downlink satellite signal can be a satellite navigation signal of a first generation Beidou navigation system, a second generation Beidou navigation system, a GPS, a Glonass navigation system and/or a Galileo navigation system; the uplink satellite signal can be a Beidou I L frequency point signal.
The downlink satellite signals are forwarded through the downlink satellite signal forwarding module, the uplink satellite signal processing module processes the uplink satellite signals, the uplink satellite signals and the downlink satellite signals are isolated through the first signal isolation module and the second signal isolation module, the simultaneous work of receiving and transmitting signals can be realized, the satellite signals of different frequency bands of a plurality of navigation systems including a Beidou first-generation receiving frequency band and a transmitting frequency band are forwarded simultaneously, and the modern multi-system combined navigation and the compatible Beidou first-generation receiving and transmitting design are realized.
It should be noted that the uplink satellite signal is a signal transmitted from the navigation device to the navigation system, but is not necessarily a signal transmitted from the navigation device to the navigation satellite; the downlink satellite signal is a signal transmitted from the navigation system to the navigation device, and is not necessarily a signal transmitted from the navigation satellite to the navigation device.
In the satellite signal forwarding system, the uplink satellite signal transmitted by the navigation equipment is processed by the uplink satellite signal processing module, the processed uplink satellite signal is transmitted to the outdoor antenna by the second signal isolation module, and the uplink satellite signal transmitted by the navigation equipment is transmitted to the navigation satellite by the outdoor antenna; meanwhile, downlink satellite signals of different frequencies of a plurality of satellite navigation systems are received through the outdoor antenna and are forwarded by the downlink satellite signal forwarding module, so that the uplink satellite signals and the downlink satellite signals are simultaneously forwarded, multi-system combined navigation can be realized, and the functions of the satellite signal forwarding system are enriched; the first signal isolation module and the second signal isolation module are used for isolating the uplink satellite signals and the downlink satellite signals, and the reliability of the satellite signal forwarding system is improved.
In one embodiment, a satellite signal forwarding system is provided, which includes a first signal isolation module, a second signal isolation module, an indoor antenna, an outdoor antenna, a downlink satellite signal forwarding module, and an uplink satellite signal processing module;
the first signal isolation module is respectively connected with the indoor antenna, the downlink satellite signal forwarding module and the uplink satellite signal processing module; the second signal isolation module is respectively connected with the outdoor antenna, the downlink satellite signal forwarding module and the uplink satellite signal processing module;
the indoor antenna is used for receiving a first uplink satellite signal transmitted by the navigation equipment and transmitting the first uplink satellite signal to the uplink satellite signal processing module through the first signal isolation module; the uplink satellite signal processing module processes the first uplink satellite signal to obtain a second uplink satellite signal, and transmits the second uplink satellite signal to the outdoor antenna through the second signal isolation module; the outdoor antenna transmits a second uplink satellite signal.
The outdoor antenna receives a first downlink satellite signal transmitted by a navigation satellite, and transmits the first downlink satellite signal to the downlink satellite signal forwarding module through the second signal isolation module;
the downlink satellite signal forwarding module carries out filtering amplification processing on the first downlink satellite signal to obtain a second downlink satellite signal, and the second downlink satellite signal is transmitted to the indoor antenna through the first signal isolation module; the indoor antenna transmits a second downlink satellite signal.
Specifically, when the outdoor antenna receives the first downlink satellite signal, the uplink satellite signal and the downlink satellite signal are isolated by the second signal isolation module, and the first downlink satellite signal is transmitted to the downlink satellite signal forwarding module, so that the normal operation of receiving and transmitting can be ensured. The downlink satellite signal forwarding module performs filtering, amplification and other processing on the first downlink satellite signal to obtain a second downlink satellite signal, forwards the downlink satellite signal through the indoor antenna, receives and forwards the downlink satellite signal received by the outdoor antenna under the condition of ensuring that the signal is not deteriorated, and further can realize the reception of a low noise coefficient.
The first downlink satellite signal received by the outdoor antenna may include satellite navigation signals of different frequency bands of a plurality of navigation systems, for example, signals of different frequency bands of a GPS navigation system, a glonass navigation system, a beidou navigation system, and/or a galileo navigation system, so that a plurality of navigation systems can be supported, and coverage of satellite navigation signals can be realized for different places.
In one embodiment, the uplink satellite signal processing module comprises a first filtering and amplifying unit connected with the second signal isolation module; and the first filtering and amplifying unit is used for filtering and amplifying the first uplink satellite signal to obtain a second uplink satellite signal.
Specifically, the first uplink satellite signal can be filtered and amplified through the first filtering and amplifying unit, out-of-band noise of the first uplink satellite signal is filtered, and a filtering result is amplified, so that a second uplink satellite signal is obtained, the transmitting power of the second uplink satellite signal reaches 10W (watt), the transmission requirement of a Beidou first-generation navigation system is met, the high transmitting power is achieved, and the signal coverage range is wide. The first filtering and amplifying unit can amplify and filter the first generation Beidou L frequency point signals received by the indoor antenna, and power amplification of the first generation Beidou satellite navigation signals transmitted indoors is achieved and transmitted to the navigation satellite.
In one embodiment, as shown in fig. 3, the first filtering and amplifying unit includes a first amplifier 310, a second amplifier 320, a third amplifier 330, a first filter 340, and a second filter 350;
the first amplifier 310 is respectively connected with the first signal isolation module and the first filter 340; the first filter 340 is connected with the second amplifier 320; the second amplifier 320 is connected with the third amplifier 330; the third amplifier 330 is connected to the second filter 350; the second filter 350 is connected to the second signal isolation module.
The first amplifier, the second amplifier and the third amplifier can be low noise amplifiers.
Specifically, the first uplink satellite signal is filtered through the first filter and the second filter, and the first uplink satellite signal is amplified through the first amplifier, the second amplifier and the third amplifier, so that the satellite signal forwarding system can realize high-gain amplification, the first uplink satellite signal is filtered and amplified, the transmission power of the second uplink satellite signal can meet the transmission requirement of a Beidou first-generation navigation system, the high power transmission is realized, and the signal coverage range is wide.
In one embodiment, as shown in fig. 4, the uplink satellite signal processing module further includes a preprocessing unit 410 and an enable control unit 420; the preprocessing unit 410 is respectively connected to the first signal isolation module, the first filtering and amplifying unit and the enabling control unit 420; the enable control unit 420 is connected with the first filtering and amplifying unit;
the preprocessing unit 410 performs branch processing on the received first uplink satellite signal to obtain a first uplink branch signal and a second uplink branch signal, and transmits the first uplink branch signal to the first filtering and amplifying unit and transmits the second uplink branch signal to the enable control unit 420;
the enabling control unit 420 controls the working state of the first filtering and amplifying unit according to the power of the second uplink shunt signal;
and the first filtering and amplifying unit is used for filtering and amplifying the first uplink shunt signal to obtain a second uplink satellite signal.
Specifically, the enabling control unit performs power detection on the second uplink branch signal, and controls the working state of the first filtering and amplifying unit according to the detection result, so that the working state of the first filtering and amplifying unit is controlled according to the power of the second uplink branch signal. When the power of the second uplink branch signal is too low, the amplification function of the first filtering and amplifying unit can be turned off, namely the first filtering and amplifying unit carries out filtering processing on the first uplink branch signal; and when the power of the second uplink branch signal meets the requirement of preset power, the first filtering and amplifying unit filters and amplifies the first uplink branch signal. It should be noted that the preset power can be determined according to actual conditions and design requirements.
When the navigation equipment needs to transmit an uplink satellite signal to a navigation satellite, the indoor antenna receives a first uplink satellite signal, the first signal isolation module transmits the first uplink satellite signal to the preprocessing unit, the preprocessing unit performs filtering processing on the first uplink satellite signal and branches a filtering result to obtain a first uplink branch signal and a second uplink branch signal, transmits the first uplink branch signal to the first filtering amplification unit, and transmits the second uplink branch signal to the enable control unit. The enabling control unit carries out power detection on the second uplink shunt signal (specifically, a Beidou I L frequency point signal received by an indoor antenna), judges whether to turn on the power amplifier of the first filtering amplification unit according to the power, and turns off the power amplifier when the power amplifier is low-power or no-power, so that the power detection is realized to control the power amplifier switch, and the power consumption of the satellite signal forwarding system is reduced.
In one embodiment, as shown in fig. 5, the pre-processing unit comprises a third filter 510 and a first splitter 520; the enabling control unit comprises a power detector 530, an operational amplifier comparator 540 and a voltage regulator tube 550;
the third filter 510 is respectively connected with the first signal isolation module and the first splitter 520; the first splitter 520 is respectively connected with the first filtering and amplifying unit and the power detector 530; the power detector 530 is connected with the operational amplifier comparator 540; the operational amplifier comparator 540 is connected to the first filtering and amplifying unit and the voltage regulator tube 550 respectively.
The model of the voltage regulator tube can be LDO 1.
Specifically, the third filter is configured to perform filtering processing on the first uplink satellite signal; the first splitter is used for splitting the filtering result. The first branching device is respectively connected with the first filtering and amplifying unit and the power detector, so that the first uplink branching signal can be transmitted to the first filtering and amplifying unit, and the second uplink branching signal can be transmitted to the power detector.
And the power detector performs power detection on the second uplink branch signal and inputs a detection result to the non-inverting input end of the operational amplifier comparator. And comparing the detection result with the reference voltage by using the operational amplifier comparator by inputting the reference voltage into the inverting input end of the operational amplifier comparator. The operational amplifier comparator is connected to the first filtering and amplifying unit, so that the first filtering and amplifying unit can be controlled according to the comparison result, and the working state of the first filtering and amplifying unit can be controlled according to the power of the second uplink shunt signal. Meanwhile, the stability of the reference voltage is ensured by connecting the inverting input end of the operational amplifier comparator with a voltage stabilizing tube.
In one embodiment, as shown in fig. 6, the uplink satellite signal processing module further includes a power control unit 610 connected between the preprocessing unit and the first filtering and amplifying unit; the power control unit 610 is connected with the enable control unit;
the enabling control unit further transmits a power control signal to the power control unit 610 according to the power of the second uplink shunt signal;
the power control unit 610 performs attenuation processing on the first uplink shunt signal according to the power control signal to obtain an attenuation signal, and transmits the attenuation signal to the first filtering and amplifying unit;
and the first filtering and amplifying unit is used for filtering and amplifying the attenuated signal to obtain a second uplink satellite signal.
Specifically, the enabling control unit performs power detection on the second uplink branch signal, transmits a power control signal to the power control unit according to the detection result, and controls the working state of the first filtering and amplifying unit; the power Control unit determines an attenuation multiple according to the power Control signal, attenuates the first uplink shunt signal according to the attenuation multiple to obtain an attenuated signal, and transmits the attenuated signal to the first filtering amplification unit, so that an Automatic Gain Control (AGC) function can be realized, the power of the second uplink satellite signal reaching the outdoor antenna is ensured to just meet the input requirement of the outdoor antenna, the power amplifier saturation signal distortion caused by the overlarge uplink satellite signal power is avoided, and the output transmission power of the outdoor antenna is ensured to reach 10W.
It should be noted that the power control unit may adjust the power of the first uplink split signal according to actual conditions and design requirements, and is not limited to perform attenuation processing on the first uplink split signal, and may also perform power amplification.
When the navigation equipment needs to transmit the uplink satellite signal to the navigation satellite, the first uplink satellite signal is subjected to filtering and shunt processing by the preprocessing unit to obtain a first uplink shunt signal and a second uplink shunt signal, and the first uplink shunt signal is transmitted to the first filtering and amplifying unit and the second uplink shunt signal is transmitted to the enabling control unit. The enabling control unit carries out power detection on the second uplink branch signal, transmits a power control signal to the power control unit according to the power, and controls the working state of the first filtering amplification unit. The power control unit performs attenuation processing on the first uplink shunt signal according to the power control signal to obtain an attenuation signal, and transmits the attenuation signal to the first filtering and amplifying unit. The first filtering amplification unit carries out filtering processing or filtering amplification processing on the attenuation signal according to the control of the enabling control unit to obtain a second uplink satellite signal, so that the power of the second uplink satellite signal can just meet the input requirement of an outdoor antenna, signal distortion is avoided, and the reliability of communication is improved.
In one embodiment, as shown in fig. 7, the power control unit includes a single chip 612 and an adjustable attenuator 614;
the singlechip 612 is respectively connected with an enabling control unit and an adjustable attenuator 614; the adjustable attenuator 614 is respectively connected with the preprocessing unit and the first filtering and amplifying unit.
Specifically, the single chip microcomputer determines the attenuation multiple according to the received power control signal, and inputs the automatic gain control voltage to the adjustable attenuator, so that the gain attenuation of the uplink satellite signal can be controlled through the single chip microcomputer. The singlechip is connected with the adjustable attenuator, so that the adjustable attenuator can attenuate the first uplink satellite signal according to the attenuation multiple (or the automatic gain control voltage), and the power of the second uplink satellite signal output to the outdoor antenna is a stable power value.
In one embodiment, the first signal isolation module and the second signal isolation module are duplexers;
the downlink satellite signal forwarding module comprises a second splitter, a first combiner, a second filtering and amplifying unit, a third filtering and amplifying unit and a fourth filtering and amplifying unit;
the second splitter is respectively connected with the second signal isolation module, the second filtering and amplifying unit, the third filtering and amplifying unit and the fourth filtering and amplifying unit; the first combiner is respectively connected with the third filtering and amplifying unit, the fourth filtering and amplifying unit and the second combiner; the second combiner is respectively connected with the first signal isolation module and the second filtering amplification unit.
Specifically, the first downlink satellite signal is split by the second splitter, the first downlink satellite signal including the multiband signal is split into single frequency bands, and the single frequency bands are respectively output to the second filtering and amplifying unit, the third filtering and amplifying unit and the fourth filtering and amplifying unit. After the downlink satellite signals are subjected to filtering amplification processing, the signals are combined through the first combiner and the second combiner, so that the signals of different frequency bands of a plurality of navigation systems received by the outdoor antenna can be amplified, filtered and combined respectively. And the combined signal is transmitted to an indoor antenna through the first signal isolation module to be transmitted, so that forwarding of the downlink satellite signal is realized.
For example, when the first downlink satellite signal may include a first band signal, a second band signal and a third band signal, the first downlink satellite signal is split by the second splitter to obtain a first downlink split signal, a second downlink split signal and a third downlink split signal. The first downlink shunt signal is a first frequency band signal; the second downlink shunt signal is a second frequency band signal; the third downlink split signal is a third frequency band signal. And the first downlink shunt signal is output to a second filtering and amplifying unit, the second downlink shunt signal is output to a third filtering and amplifying unit, the third downlink shunt signal is output to a fourth filtering and amplifying unit, filtering and amplifying processing is respectively carried out on each downlink shunt signal, each downlink shunt signal is combined through a first combiner and a second combiner, and the combined signal is transmitted to the indoor antenna through a first signal isolation module.
It should be noted that the number of the filtering and amplifying units in the downlink satellite signal forwarding module may be increased or decreased according to actual situations or design requirements, and is not necessarily three, and for example, the number of the filtering and amplifying units may be determined according to the number of navigation systems supported by the satellite signal forwarding system, or according to the number of frequency bands of the navigation systems supported by the satellite signal forwarding system.
In one embodiment, the system further comprises a power supply module;
the power supply module is used for providing working voltage for the first signal isolation module, the second signal isolation module, the indoor antenna, the outdoor antenna, the downlink satellite signal forwarding module and the uplink satellite signal processing module.
Specifically, the power supply module may be a rectifier for converting an ac voltage of 110V (volts) to 220V (volts) into a dc voltage and supplying each module unit with the dc voltage.
To explain by a specific example, as shown in fig. 8, a satellite signal forwarding system is provided, which includes an indoor antenna, an outdoor antenna, a first duplexer, a second duplexer, a first filtering and amplifying unit, a preprocessing unit, an enable control unit, a power control unit, a second splitter, a first combiner, a second filtering and amplifying unit, a third filtering and amplifying unit, and a fourth filtering and amplifying unit; in a specific example, a power supply module may be further included;
the indoor antenna is connected with the first duplexer; the first duplexer is respectively connected with the preprocessing unit and the second combiner; the first preprocessing unit is respectively connected with the power control unit and the enabling control unit; the enabling control unit is respectively connected with the first filtering amplification unit and the power control unit; the power control unit is connected with the first filtering and amplifying unit; the first filtering amplification unit is connected with the second duplexer;
the second duplexer is respectively connected with the outdoor antenna and the second splitter; the second splitter is respectively connected with the second filtering and amplifying unit, the third filtering and amplifying unit and the fourth filtering and amplifying unit; the first combiner is respectively connected with the third filtering and amplifying unit and the fourth filtering and amplifying unit; the second combiner is respectively connected with the first combiner and the second filtering and amplifying unit;
the power supply module is respectively connected with the indoor antenna, the outdoor antenna, the first duplexer, the second duplexer, the first filtering and amplifying unit, the preprocessing unit, the enabling control unit, the power control unit, the second splitter, the first combiner, the second filtering and amplifying unit, the third filtering and amplifying unit and the fourth filtering and amplifying unit.
The indoor antenna and the outdoor antenna can be multi-system multi-frequency transceiving active antennas; each amplifier may be a low noise amplifier.
Specifically, the outdoor antenna is a receiving and transmitting integrated antenna, and can receive Beidou, GPS, GLONASS and Galileo navigation signals and transmit Beidou I L frequency point signals; the indoor antenna can transmit Beidou, GPS, GLONASS and Galileo navigation signals and receive Beidou I L frequency point signals. The downlink satellite signal forwarding module is used for respectively amplifying and filtering a plurality of navigation system signals received by the outdoor antenna and then combining the signals.
In the uplink process, the indoor antenna transmits the transmission signal to the uplink satellite signal processing module, the uplink satellite signal processing module transmits the transmission signal to the outdoor antenna after the processing of wave detection, automatic attenuation control, amplification and filtering and the like, and the transmission signal is transmitted to the navigation satellite by the outdoor antenna. The uplink satellite signal processing module is used for amplifying and filtering the first-generation Beidou L frequency point signals received by the indoor antenna, carrying out power detection on the first-generation Beidou L frequency point signals received by the indoor antenna, and controlling the gain attenuation of the first-generation Beidou L frequency point amplification through the single chip microcomputer, so that the power output to the outdoor antenna by the first-generation Beidou L frequency point is a stable power value.
The satellite signal forwarding system not only can be used for forwarding the received satellite navigation signals, but also can be used for transmitting the ground first-generation Beidou navigation signals to the navigation satellite, so that the forwarding work of the multi-frequency multi-system navigation satellite is realized, and the receiving and transmitting of the first-generation Beidou navigation system signals are compatible.
In the satellite signal forwarding system, the downlink satellite signals received by the outdoor antenna can be received and forwarded under the condition of ensuring that the signals are not deteriorated, so that the low noise coefficient can be received; meanwhile, satellite navigation signals of a plurality of navigation systems in different frequency bands are supported, and the coverage of the satellite navigation signals in different places can be realized.
In one embodiment, as shown in fig. 9, there is provided a satellite signal forwarding method, including the steps of:
step S902, the indoor antenna is used for receiving a first uplink satellite signal transmitted by the navigation equipment and transmitting the first uplink satellite signal to the uplink satellite signal processing module through the first signal isolation module;
step S904, the uplink satellite signal processing module processes the first uplink satellite signal to obtain a second uplink satellite signal, and transmits the second uplink satellite signal to the outdoor antenna through the second signal isolation module;
step S906, the outdoor antenna transmits the second uplink satellite signal.
It should be understood that, although the steps in the flowchart of fig. 9 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 9 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 10, there is provided a satellite signal forwarding apparatus including: a first uplink satellite signal receiving module 120, a second uplink satellite signal acquiring module 130, and a second uplink satellite signal transmitting module 140, wherein:
the first uplink satellite signal receiving module 120 is configured to receive a first uplink satellite signal transmitted by the navigation device through the indoor antenna, and transmit the first uplink satellite signal to the uplink satellite signal processing module through the first signal isolation module.
And a second uplink satellite signal obtaining module 130, configured to process the first uplink satellite signal through the uplink satellite signal processing module to obtain a second uplink satellite signal, and transmit the second uplink satellite signal to the outdoor antenna through the second signal isolation module.
And a second uplink satellite signal transmitting module 140, configured to transmit a second uplink satellite signal through an outdoor antenna.
For specific limitations of the satellite signal forwarding apparatus, reference may be made to the above limitations of the satellite signal forwarding method, which are not described herein again. The modules in the satellite signal forwarding device can be implemented in whole or in part by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 11. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a satellite signal forwarding method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 11 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A satellite signal forwarding system is characterized by comprising a first signal isolation module, a second signal isolation module, an indoor antenna, an outdoor antenna, a downlink satellite signal forwarding module and an uplink satellite signal processing module; the uplink satellite signal processing module comprises a first filtering amplification unit, a preprocessing unit and an enabling control unit;
the first signal isolation module is respectively connected with the indoor antenna, the downlink satellite signal forwarding module and the preprocessing unit; the second signal isolation module is respectively connected with the outdoor antenna, the downlink satellite signal forwarding module and the first filtering amplification unit; the preprocessing unit is respectively connected with the first filtering and amplifying unit and the enabling control unit; the enabling control unit is connected with the first filtering and amplifying unit;
the indoor antenna is used for receiving a first uplink satellite signal transmitted by navigation equipment and transmitting the first uplink satellite signal to the preprocessing unit through the first signal isolation module; the preprocessing unit carries out shunt processing on the received first uplink satellite signal to obtain a first uplink shunt signal and a second uplink shunt signal, and transmits the first uplink shunt signal to the first filtering and amplifying unit and transmits the second uplink shunt signal to the enabling control unit;
the enabling control unit controls the working state of the first filtering and amplifying unit according to the power of the second uplink shunt signal;
the first filtering and amplifying unit is used for filtering and amplifying the first uplink shunt signal to obtain a second uplink satellite signal, and the second uplink satellite signal is transmitted to the outdoor antenna through the second signal isolation module; the outdoor antenna transmits the second uplink satellite signal.
2. The satellite signal repeating system of claim 1,
the outdoor antenna receives a first downlink satellite signal transmitted by a navigation satellite, and transmits the first downlink satellite signal to the downlink satellite signal forwarding module through the second signal isolation module;
the downlink satellite signal forwarding module is used for filtering and amplifying the first downlink satellite signal to obtain a second downlink satellite signal, and the second downlink satellite signal is transmitted to the indoor antenna through the first signal isolation module; and the indoor antenna transmits the second downlink satellite signal.
3. The satellite signal forwarding system of claim 1, wherein the first filtering and amplifying unit comprises a first amplifier, a second amplifier, a third amplifier, a first filter and a second filter;
the first amplifier is respectively connected with the first signal isolation module and the first filter; the first filter is connected with the second amplifier; the second amplifier is connected with the third amplifier; the third amplifier is connected with the second filter; the second filter is connected with the second signal isolation module.
4. The satellite signal forwarding system of claim 1, wherein the preprocessing unit comprises a third filter and a first splitter; the enabling control unit comprises a power detector, an operational amplifier comparator and a voltage stabilizing tube;
the third filter is respectively connected with the first signal isolation module and the first splitter; the first splitter is respectively connected with the first filtering and amplifying unit and the power detector; the power detector is connected with the operational amplifier comparator; and the operational amplifier comparator is respectively connected with the first filtering and amplifying unit and the voltage-stabilizing tube.
5. The satellite signal forwarding system of claim 1, wherein the uplink satellite signal processing module further comprises a power control unit connected between the preprocessing unit and the first filtering and amplifying unit; the power control unit is connected with the enabling control unit;
the enabling control unit further transmits a power control signal to the power control unit according to the power of the second uplink shunt signal;
the power control unit performs attenuation processing on the first uplink shunt signal according to the power control signal to obtain an attenuation signal, and transmits the attenuation signal to the first filtering and amplifying unit;
and the first filtering and amplifying unit is used for filtering and amplifying the attenuation signal to obtain the second uplink satellite signal.
6. The satellite signal forwarding system of claim 5, wherein the power control unit comprises a single chip microcomputer and an adjustable attenuator;
the single chip microcomputer is respectively connected with the enabling control unit and the adjustable attenuator; the adjustable attenuator is respectively connected with the preprocessing unit and the first filtering and amplifying unit.
7. The satellite signal forwarding system of any one of claims 1 to 6 wherein the first signal isolation module and the second signal isolation module are duplexers;
the downlink satellite signal forwarding module comprises a second splitter, a first combiner, a second filtering and amplifying unit, a third filtering and amplifying unit and a fourth filtering and amplifying unit;
the second splitter is respectively connected with the second signal isolation module, the second filtering and amplifying unit, the third filtering and amplifying unit and the fourth filtering and amplifying unit; the first combiner is respectively connected with the third filtering and amplifying unit, the fourth filtering and amplifying unit and the second combiner; the second combiner is respectively connected with the first signal isolation module and the second filtering and amplifying unit.
8. A satellite signal transfer method based on the satellite signal transfer system according to any one of claims 1 to 7, comprising the steps of:
the indoor antenna is used for receiving a first uplink satellite signal transmitted by the navigation equipment and transmitting the first uplink satellite signal to the preprocessing unit through the first signal isolation module; the preprocessing unit carries out shunt processing on the received first uplink satellite signal to obtain a first uplink shunt signal and a second uplink shunt signal, and transmits the first uplink shunt signal to the first filtering and amplifying unit and transmits the second uplink shunt signal to the enabling control unit;
the enabling control unit controls the working state of the first filtering and amplifying unit according to the power of the second uplink shunt signal;
the first filtering and amplifying unit is used for filtering and amplifying the first uplink shunt signal to obtain a second uplink satellite signal, and the second uplink satellite signal is transmitted to the outdoor antenna through the second signal isolation module;
the outdoor antenna transmits the second uplink satellite signal.
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| CN202975327U (en) * | 2012-12-18 | 2013-06-05 | 深圳市鼎耀科技有限公司 | Multi-frequency satellite signal forwarding equipment |
| CN104682985B (en) * | 2013-11-28 | 2017-11-21 | 郑州威科姆科技股份有限公司 | GNSS multimode multi-function device modules and multi-mode radio frequency receive-transmit system |
| WO2018225902A1 (en) * | 2017-06-09 | 2018-12-13 | 이성준 | Smart mobile base station for providing satellite signal-based multi-band wireless communication and location information, and providing method therefor |
| CN108259066B (en) * | 2017-12-28 | 2019-07-12 | 中国航天系统科学与工程研究院 | A kind of same frequency telemetered signal twocouese repeater system for taking into account polytypic task |
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