CN114035213A - Signal processing method and device, storage medium, and electronic device - Google Patents

Abstract

The embodiment of the invention provides a signal processing method and device, a storage medium and an electronic device, wherein the method comprises the following steps: determining the signal type of a received satellite signal, wherein the satellite signal comprises a Beidou satellite signal or a Global Positioning System (GPS) signal; and processing the satellite signals based on the signal types to determine target signals, wherein the target signals are suitable for different types of terminal equipment. The invention solves the problem of compatibility of different types of satellite signals in the related technology and achieves the effect of compatibility of different types of satellite signals.

Description

Signal processing method and device, storage medium, and electronic device

Technical Field

The embodiment of the invention relates to the field of signal processing, in particular to a signal processing method and device, a storage medium and an electronic device.

Background

The time asynchronization among Base stations can affect network quality, mainly shows the influence on searching and switching of adjacent regions and interference rise, the 4G era starts from 2000, clock synchronization on equipment of the equipment is realized by an air interface of the equipment, most of the equipment does not support Beidou signals, and inestimable loss can be caused by the occurrence of a problem of a Base Band Unit (BBU) clock in a machine room under the era background of universal interconnection;

the timing scheme of the BBU of the operator is realized by adopting a baseband timing board card of a BBU manufacturer, but the method has the problems of insufficient slot positions of frame service and high cost. According to the requirement of services in the 5G era, a C-RAN base station construction mode is provided, BBUs are placed in a centralized mode, the number of BBUs in a machine room is gradually increased, the aperture of radio frequency cables pulled out of the original machine room is insufficient, too many outdoor antennas are limited in outdoor sky surface, a master-slave mode is developed to be adopted to simply converge and combine satellite signals received by air interfaces, a plurality of paths of time service interfaces are combined into one or two air interfaces through equipment and output to the roof of the machine room to receive signals, but the mode can only solve the problem of BBU time service supporting BD/GPS dual-mode satellite signals, and cannot solve the problem that most 4G equipment BBUs in a network only support GPS signals.

The related technology of the prior art can only realize time sharing among a certain number of BBUs, and cannot enable BBUs which originally only support GPS time service to use Beidou satellites.

Disclosure of Invention

Embodiments of the present invention provide a signal processing method and apparatus, a storage medium, and an electronic apparatus, so as to at least solve the problem of compatibility with different types of satellite signals in related technologies.

According to an embodiment of the present invention, there is provided a signal processing method including: determining the signal type of a received satellite signal, wherein the satellite signal comprises a Beidou satellite signal or a Global Positioning System (GPS) signal; and processing the satellite signals based on the signal types to determine target signals, wherein the target signals are suitable for different types of terminal equipment.

According to another embodiment of the present invention, there is provided a signal processing system including: the receiving device is used for receiving satellite signals, wherein the satellite signals comprise Beidou satellite signals or Global Positioning System (GPS) signals; the control device is used for determining the signal type of a received satellite signal, processing the satellite signal based on the signal type and determining a target signal, wherein the target signal is suitable for different types of terminal devices; and a distribution device configured to distribute the target signal to N terminal devices, where N is a natural number greater than or equal to 1.

In one exemplary embodiment, the control apparatus described above includes: the analysis module is used for analyzing signal information of the Beidou satellite signals under the condition that the satellite signals are determined to comprise the Beidou satellite signals, wherein the signal information comprises coordinate information and time information of Beidou satellite equipment; the time compensation module is used for performing time compensation processing on the Beidou satellite signal based on the signal information to obtain a compensation signal; and the signal conversion module is used for converting the compensation signal into the GPS analog signal according to the format of the GPS signal to obtain the target signal.

In an exemplary embodiment, the time compensation module includes: the frequency offset calculation unit is used for carrying out frequency offset calculation on the Beidou satellite signal to obtain a frequency compensation value; a synchronous compensation unit, which is used for calculating an absolute time compensation value by using the frequency compensation value and the local clock frequency offset; and the channel simulation unit is used for acquiring an ephemeris of the Beidou satellite equipment and compensating an error of the coordinate information of the Beidou satellite equipment in the ephemeris according to the absolute time compensation value to obtain the compensation signal, wherein the ephemeris comprises the signal information.

In an exemplary embodiment, the control apparatus further includes: a generating unit, configured to generate a GPS ephemeris according to the coordinate information and the time information; the conversion unit is used for converting the GPS ephemeris into a navigation message and a baseband signal; the modulation unit is used for modulating the baseband signal to a preset frequency point; and the output unit is used for outputting the navigation message and the baseband signal of the preset frequency point.

In an exemplary embodiment, the receiving apparatus includes: a first antenna device for receiving the GPS signal; and the second antenna equipment is used for receiving the Beidou satellite signals.

In an exemplary embodiment, the system further includes: and the board level equipment is used for amplifying the GPS signal to obtain an amplified signal under the condition that the satellite signal is determined to comprise the GPS signal.

In an exemplary embodiment, the system further comprises at least one of: the atomic clock is connected with the board-level equipment and used for acquiring clock information oscillated by the board-level equipment under the condition that the target signal is abnormal, wherein the clock information is used for simulating the time keeping precision of the satellite equipment; and the crystal oscillator is connected with the board-level equipment and is used for outputting the time information of the satellite equipment.

In an exemplary embodiment, the system further includes: monitoring equipment for monitoring antenna equipment in the system, wherein the antenna equipment is used for receiving the satellite signals; and the indicator light is used for outputting prompt information under the condition that the antenna equipment is abnormal, wherein the prompt information is used for prompting the antenna equipment to be abnormal.

According to a further embodiment of the present invention, there is also provided a computer-readable storage medium having a computer program stored thereon, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.

According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.

According to the invention, the signal type of the received satellite signal is determined, wherein the satellite signal comprises a Beidou satellite signal or a Global Positioning System (GPS) signal; and processing the satellite signals based on the signal types to determine target signals, wherein the target signals are suitable for different types of terminal equipment. The satellite signal processing method and the terminal achieve the purpose that the satellite signal is correspondingly processed based on different types of satellite signals, so that the terminal can be compatible with different types of satellite signals. Therefore, the problem of compatibility of different types of satellite signals in the related technology can be solved, and the effect of compatibility of different types of satellite signals can be achieved.

Drawings

Fig. 1 is a block diagram of a hardware configuration of a mobile terminal of a signal processing method according to an embodiment of the present invention;

FIG. 2 is a flow chart of a signal processing method according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a structure for demodulating a signal according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of an overall system according to an embodiment of the invention;

FIG. 5 is an overall flow diagram according to an embodiment of the invention;

FIG. 6 is a diagram of a complete machine internal hardware framework according to an embodiment of the invention;

FIG. 7 is a system framework diagram according to an embodiment of the invention;

FIG. 8 is a circuit hardware architecture diagram of a machine room time service shunt system according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a Beidou signal to GPS signal conversion in accordance with an embodiment of the present invention;

FIG. 10 is a flowchart illustrating the starting of a machine room time service shunting system according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a product according to an embodiment of the invention;

FIG. 12 is a schematic diagram of a product according to an embodiment of the invention;

FIG. 13 is a schematic application diagram of a machine room time service shunting system according to an embodiment of the present invention;

fig. 14 is a block diagram of a signal processing system according to an embodiment of the present invention.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in conjunction with the embodiments.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The method embodiments provided in the embodiments of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking the mobile terminal as an example, fig. 1 is a block diagram of a hardware structure of the mobile terminal according to a signal processing method of the embodiment of the present invention. As shown in fig. 1, the mobile terminal may include one or more (only one shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), and a memory 104 for storing data, wherein the mobile terminal may further include a transmission device 106 for communication functions and an input-output device 108. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration, and does not limit the structure of the mobile terminal. For example, the mobile terminal may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.

The memory 104 may be used for storing computer programs, for example, software programs and modules of application software, such as computer programs corresponding to the signal processing method in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the computer programs stored in the memory 104, so as to implement the method described above. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the mobile terminal over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a Network adapter (NIC), which can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.

In the present embodiment, a signal processing method is provided, and fig. 2 is a flowchart of the signal processing method according to the embodiment of the present invention, and as shown in fig. 2, the flowchart includes the following steps:

step S202, determining the signal type of the received satellite signal, wherein the satellite signal comprises a Beidou satellite signal or a Global Positioning System (GPS) signal;

and step S204, processing the satellite signals based on the signal types, and determining target signals, wherein the target signals are suitable for different types of terminal equipment.

The execution subject of the above steps may be a terminal, but is not limited thereto.

In this embodiment, the processing of the satellite signals includes distribution of GPS satellite signals and processing of converting the beidou satellite signals into GPS signals.

Through the steps, the signal type of the received satellite signal is determined, wherein the satellite signal comprises a Beidou satellite signal or a Global Positioning System (GPS) signal; and processing the satellite signals based on the signal types to determine target signals, wherein the target signals are suitable for different types of terminal equipment. The satellite signal processing method and the terminal achieve the purpose that the satellite signal is correspondingly processed based on different types of satellite signals, so that the terminal can be compatible with different types of satellite signals. Therefore, the problem of compatibility of different types of satellite signals in the related technology can be solved, and the effect of compatibility of different types of satellite signals can be achieved.

In one exemplary embodiment, processing the satellite signal based on the signal type to determine the target signal comprises:

s301, under the condition that the satellite signals include the Beidou satellite signals, converting the Beidou satellite signals into GPS analog signals, and determining target signals. The method specifically comprises the following steps:

s401, analyzing signal information of a Beidou satellite signal, wherein the signal information comprises coordinate information and time information of Beidou satellite equipment; the receiver receives a Beidou satellite signal from the air, wherein the Beidou satellite signal comprises information such as Pulse Per Second (1 PPS), longitude and latitude, coordinated universal time UTC time and the like;

s402, performing time compensation processing on the Beidou satellite signal based on the signal information to obtain a compensation signal, wherein the compensation signal is a digital signal;

and S403, converting the compensation signal into a GPS analog signal according to the format of the GPS signal to obtain a target signal.

According to the embodiment, the Beidou satellite signal is converted into the GPS signal, so that the BBU equipment which does not support the BD signal can use the Beidou satellite.

In this embodiment, the time compensation processing is performed on the Beidou satellite signal based on the signal information to obtain a compensation signal, and the method includes the following steps:

s501, performing frequency offset calculation on the Beidou satellite signal to obtain a frequency compensation value; local 20M clock frequency offset can be calculated by utilizing 1PPS to obtain a frequency compensation value;

s502, calculating an absolute time compensation value (namely absolute time deviation) by using the frequency compensation value and the local clock frequency offset;

s503, obtaining an ephemeris of the Beidou satellite equipment, wherein the ephemeris comprises signal information, namely longitude and latitude of the Beidou satellite equipment;

s504, calculating a pseudo range based on the longitude and latitude of the Beidou satellite equipment and the coordinates of the local user, calculating a CM chip through the pseudo range, and compensating errors of the coordinate information of the Beidou satellite equipment in the ephemeris according to the absolute time compensation value and the CM chip to obtain a compensation signal.

In one exemplary embodiment, processing the satellite signal based on the signal type to determine the target signal comprises the steps of:

s601, amplifying the GPS signal to obtain an amplified signal under the condition that the satellite signal is determined to comprise the GPS signal; a Low Noise Amplifier (LNA) in a board level may be used to amplify a GPS signal received by an antenna;

s602, the amplified signal is distributed to N terminal devices, where N is a natural number greater than or equal to 1. Distribution may be performed using a power splitter panel.

In this embodiment, the amplified signal is distributed to N terminal devices, and multiple outputs of the GPS signal can be realized.

In one exemplary embodiment, prior to determining the signal type of the received satellite signal, the method further comprises the steps of:

s701, receiving M paths of signals through M paths of antenna equipment, wherein M is a natural number greater than or equal to 1; the M-path antenna equipment comprises an antenna for receiving Beidou satellite signals and an antenna for receiving GPS signals.

S702, coupling the M paths of signals to obtain a satellite signal; may be coupled over a common link;

and S703, analyzing the coordinate information and the time information in the satellite signal.

In the embodiment, the satellite signal is coupled to the receiver for signal analysis, and information such as longitude and latitude, PP1S and the like is analyzed.

In an exemplary embodiment, the method further comprises the steps of:

s801, monitoring antenna equipment, wherein the antenna equipment is used for receiving satellite signals; the antenna equipment can be monitored in real time through the two analog channels, and the two analog channels can also switch the Ublox input signal to periodically perform antenna star search measurement.

S802, outputting prompt information under the condition that the antenna equipment is abnormal, wherein the prompt information is used for prompting the antenna equipment to be abnormal; the prompting message may be presented in the form of an indicator light.

In an exemplary embodiment, after the satellite signal is processed based on the signal type and the target signal is determined, the method further comprises the steps of:

s901, analyzing coordinate information and time information in the Beidou satellite signals under the condition that the satellite signals are determined to comprise the Beidou satellite signals;

s902, generating a GPS ephemeris according to the coordinate information and the time information;

s903, converting the GPS ephemeris into a navigation message and a baseband signal; baseband signals up to 12 satellites;

s904, modulating the baseband signal to a preset frequency point (e.g., GPS L1 frequency point);

and S905, outputting the navigation message and the baseband signal of the preset frequency point.

In an exemplary embodiment, the satellite signal is processed based on the signal type, and after the target signal is determined, the method further comprises: and under the condition that the target signal is abnormal, clock information of an atomic clock in the board-level equipment is obtained, wherein the clock information is used for simulating the time keeping precision of the satellite equipment, and the clock information is generated by oscillation of the board-level equipment.

For example, when the Beidou satellite signal fails, the Beidou satellite signal can freely oscillate and provide a high-precision clock, and the precision of the clock is less than or equal to 1us when the clock is used for simulating a GPS channel for 24 hours.

The invention is illustrated below with reference to specific examples:

the embodiment provides a method for enabling a network device only supporting a GPS signal to use a Beidou satellite, as shown in fig. 3, the Beidou satellite signal enters a demodulation device to demodulate information such as longitude and latitude, a main processor generates an analog GPS signal according to the information such as the longitude and latitude, a time compensation module performs time compensation on the analog GPS signal, and the compensated signal is converted into an analog signal by a signal regeneration module and output to a plurality of BBU devices.

In the embodiment, when the plurality of BBUs share time, the BBU equipment which does not originally support the Beidou satellite and only supports the GPS signal can demodulate, multiplex and regenerate the received Beidou signal to generate and output the GPS analog signal, and the network equipment which only supports the GPS signal originally can use the Beidou satellite.

This embodiment may be implemented by a system as shown in fig. 4, which includes: the device comprises a dual-power module, a main controller module, a digital/analog channel, a display module and a passive power division module. The controller module converts the Beidou satellite signal into a GPS analog signal while receiving the GPS/BD signal by utilizing ANT1 and ANT 2; meanwhile, the digital analog channel amplifies normal BD/GPS signals, and the passive power division unit outputs the amplified BD/GPS signals in multiple paths. The amplification extension of the BD/GPS dual-mode signal can be realized.

The system is provided with a detection module while converting signals, for example, the detection module detects whether the antenna equipment is normally installed. And storing data of the antenna equipment such as fault information, fault time, fault recovery time and the like so as to carry out dry contact point alarm. The fault data can be inquired through a Liquid Crystal Display (LCD for short) or set through PC-side software of a personal computer.

As shown in fig. 5, it is a complete flowchart for implementing signal conversion in this embodiment, and specifically includes the following steps:

s1, the Beidou/GPS receiver receives satellite signals from the air and generates 1PPS, longitude and latitude and UTC time;

s2, the board supports a Low Noise Amplifier (LNA), and can directly amplify the GPS signal received by the antenna; when the main control processor finds that the GPS signal is available, the signal is directly used as output and sent out of the equipment;

s3, the board level supports the crystal oscillator, and the main control processor compensates the TC-VCXO frequency in real time according to the received 1PPS signal so as to ensure the frequency precision of the system;

s4, the board level can also be matched with an atomic clock module, when the Beidou navigation signal fails, the board level can freely oscillate and provide a high-precision clock, and the clock is used for GPS channel simulation for 24 hours, and the time keeping precision is less than or equal to 1 us;

s5, the main control processor and the subsequent GPS ephemeris generation module automatically generate the GPS ephemeris based on the current latitude and longitude and the time information;

s6, the GPS channel simulation module automatically converts the GPS ephemeris into navigation messages and baseband signals of up to 12 satellites;

and S7, the GPS radio frequency front end modulates the baseband signal to a GPS L1 frequency point, and outputs the baseband signal through a radio frequency 1-out-of-2 module under the control of the main control processor.

The hardware frame inside the whole device in this embodiment is as shown in fig. 6, and includes a big dipper conversion circuit board, a 10M reference clock, a power division board, a power supply, a dry contact, a network interface (ethernet switch), a machine frame, and the like.

The system framework in this embodiment is shown in fig. 7, and includes: the analog channel has two paths for directly combining in the passive part, and the digital channel has one path for selecting analog and digital channels through the switch. A Field Programmable Gate Array (Field Programmable Gate Array, abbreviated as FPGA) is internally provided with a dual-core Advanced reduced instruction system processor (Advanced RISC Machines, abbreviated as ARM) processor, and a Linux operating system is operated, so that radio frequency control, dry contacts, indicator lamps, power detection and operation maintenance can be realized, and the specific steps are as follows:

1) the two analog channels need to support real-time monitoring of the antenna state, switch over of the Ublox input signal is needed, and antenna searching measurement is conducted periodically.

2) The Beidou/GPS antenna input connection state monitoring can be realized by monitoring the voltage of 5V radio frequency feed, 5V is introduced into an XADC pin of an FPGA (field programmable gate array), voltage amplitude measurement is carried out in real time, and open circuit, short circuit and normal are judged according to the voltage range.

3) And monitoring the power state of the whole machine, namely dividing the voltage of a 12V power supply and introducing the divided voltage into an XADC pin of the FPGA to measure the voltage amplitude in real time.

4) And the ALC control is realized by outputting the PWM signal through the GPIO port of the FPGA.

5) And radio frequency power detection is realized by coupling in a common link, introducing a radio frequency signal into the AD9363 to realize power monitoring, or detecting through a diode, and then introducing a voltage signal into an XADC interface of the FPGA to realize detection.

6) The system automatically switches to a radio frequency link using Beidou conversion according to the monitored GPS signal condition of the antenna feeder. The system only supports local or remote manual/automatic switching, i.e. switching from a pseudo-GPS state back to a real GPS link.

7) The mode of selectively welding feed voltage through hardware realizes the support to outside anti-interference antenna, and the configuration is fixed before leaving the factory, and to the radio frequency mouth that supports to connect anti-interference antenna, changes the connector model, prevents to connect the mistake.

8) The front panel and the rear panel are connected in a mode of minimizing the number of internal cables according to a single-board placing mode, two antenna feeder input ports, a network port, a dry contact, a 10M reference signal input port and an indicator lamp need to be placed on the front panel, and a power supply, a switch and a radio frequency output port are placed on the rear panel.

The monitoring and control information in this embodiment is shown in table 1:

a circuit hardware architecture diagram of the machine room time service shunt system in this embodiment is shown in fig. 8, and specifically includes the following contents:

1) the front end input detects whether the antenna is connected or not through radio frequency feed 5V voltage;

2) the satellite signals are coupled to a receiver for signal analysis, and information such as longitude and latitude, PP1S and the like is analyzed;

3) the detection circuit performs quality detection and shunt on the received satellite signals, the GPS signals are directly transmitted, and the Beidou signals are transmitted to the CPU;

4) the CPU carries out algorithm compensation on the information analyzed by the Beidou signals, and the recalculated satellite signal composition information is converted into a GPS signal format;

5) the signal conversion converts the digital signal calculated by the CPU into an analog signal for simulation regeneration;

6) outputting GPS signals to a next stage (BBU device) through a radio frequency output port;

7) meanwhile, the CPU controls external interfaces such as a network port, an indicator light, a serial port, a trunk node and the like;

the conversion of the beidou signal into a GPS signal in this embodiment is shown in fig. 9, and specifically includes the following:

1) the frequency offset calculation module calculates local 20M clock frequency offset based on the input 1PPS and outputs a frequency compensation value;

2) the synchronous compensation algorithm calculates the absolute time deviation in real time based on a Numerically Controlled Oscillator (NCO) and a frequency control word;

3) the channel simulation circuit calculates the real-time satellite position firstly and corrects the satellite position in real time based on the absolute time deviation;

4) the channel simulation circuit calculates a pseudo range based on the satellite position of the compensation candidate and the user position;

5) and calculating a CA chip through the pseudo range, and finally generating a simulated satellite GPS signal and finally outputting the simulated satellite GPS signal.

The machine room time service shunt system starting flow chart in the embodiment is as shown in fig. 10, and supports two-path Beidou or GPS signal input, 16-path GPS signal output, double-antenna physical backup, automatic detection and switching; the dual-power supply physical backup, the rack installation size of standard 1U height, the remote and local network management capability, the direct display of the main alarm panel, the convenient and fast troubleshooting, are shown in fig. 11 and 12.

An application schematic diagram of the machine room time service shunt system in the embodiment is shown in fig. 13, wherein equipment is installed in a standard 19-inch rack, and a time service interface of a BBU is connected with an SMA-1 of the equipment through a feeder; the antenna on the roof of the old machine room is used for connecting the antenna to a master/slave antenna interface of a machine room time service shunt system, the equipment is powered on, network management information configuration of the equipment is completed, the time service problem of a plurality of BBUs can be realized, and complete synchronization of clocks can be effectively realized among different base stations, in different cities and provinces, so that the robustness, safety, stability and reliability of a basic network are guaranteed.

In conclusion, the Beidou satellite signals can be seamlessly compatible, and compared with a BBU board card replacement mode, the cost performance is higher. And the BBU can be supported by different manufacturers, so that the compatibility is better. Digital-analog backup/analog backup, and multi-channel physical backup also improve the reliability of GPS signals received by the BBU.

Moreover, the equipment supports the redundant protection designs of Beidou and GPS double-channel physical backup, power supply double backup, antenna double backup and the like, and the stability and the reliability of the equipment are greatly improved. The equipment realizes clock error compensation through a software simulation algorithm, and greatly improves the equipment precision while reducing the equipment cost. A single device can support BBUs of multiple domestic operator mainstream manufacturers, the cost of each channel of device is reduced, meanwhile, the compatibility is strong, the BBU time service of different manufacturers in the same machine room is effectively solved, and a strong and effective system device solution is provided for Beidou satellite signal support of operator machine room scale.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

In this embodiment, a signal processing system is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and the description of which has been already made is omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 14 is a block diagram of a signal processing system according to an embodiment of the present invention, and as shown in fig. 14, the apparatus includes:

a receiving device 1402 (equivalent to the satellite receiver in the above) for receiving a satellite signal, wherein the satellite signal includes a beidou satellite signal or a global positioning system GPS signal;

a control device 1404 (equivalent to the master processor in the above) for determining a signal type of the received satellite signal, processing the satellite signal based on the signal type, and determining a target signal, wherein the target signal is suitable for different types of terminal devices;

a distribution device 1406 (equivalent to the passive power division unit in the above) for distributing the target signal to N terminal devices, where N is a natural number greater than or equal to 1.

In one exemplary embodiment, a control apparatus includes:

the analysis module is used for analyzing signal information of the Beidou satellite signals under the condition that the satellite signals are determined to comprise the Beidou satellite signals, wherein the signal information comprises coordinate information and time information of Beidou satellite equipment;

the time compensation module is used for performing time compensation processing on the Beidou satellite signal based on the signal information to obtain a compensation signal;

and the signal conversion module is used for converting the compensation signal into a GPS analog signal according to the format of the GPS signal to obtain a target signal.

In one exemplary embodiment, a time compensation module includes:

the frequency offset calculation unit is used for performing frequency offset calculation on the Beidou satellite signal to obtain a frequency compensation value;

the synchronous compensation unit is used for calculating an absolute time compensation value by using the frequency compensation value and the local clock frequency offset;

the channel simulation unit is used for acquiring an ephemeris of the Beidou satellite equipment and compensating an error of coordinate information of the Beidou satellite equipment in the ephemeris according to the absolute time compensation value to obtain a compensation signal, wherein the ephemeris comprises signal information; .

In one exemplary embodiment, the control apparatus further includes:

the generating unit is used for generating a GPS ephemeris according to the coordinate information and the time information;

the conversion unit is used for converting the GPS ephemeris into a navigation message and a baseband signal;

the modulation unit is used for modulating the baseband signal to a preset frequency point;

and the output unit is used for outputting the navigation message and the baseband signal of the preset frequency point.

In one exemplary embodiment, a receiving device includes:

a first antenna device for receiving a GPS signal;

and the second antenna equipment is used for receiving the Beidou satellite signals.

In one exemplary embodiment, the system further comprises:

and the board level equipment is used for amplifying the GPS signal to obtain an amplified signal under the condition that the satellite signal is determined to comprise the GPS signal.

In one exemplary embodiment, the system further comprises at least one of:

the atomic clock is connected with the board-level equipment and used for acquiring clock information oscillated by the board-level equipment under the condition that the target signal is abnormal, and the clock information is used for simulating the time keeping precision of the satellite equipment;

and the crystal oscillator is connected with the board-level equipment and is used for outputting the time information of the satellite equipment.

In one exemplary embodiment, the system further comprises:

the monitoring device is used for monitoring the antenna device in the system, wherein the antenna device is used for receiving satellite signals;

and the indicator light is used for outputting prompt information under the condition that the antenna equipment is abnormal, wherein the prompt information is used for prompting the antenna equipment to be abnormal.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.

Embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program is arranged to perform the steps of any of the above-mentioned method embodiments when executed.

In the present embodiment, the above-described computer-readable storage medium may be configured to store a computer program for executing the above steps.

In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.

Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.

In an exemplary embodiment, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.

In an exemplary embodiment, the processor may be configured to execute the above steps by a computer program.

For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary embodiments, and details of this embodiment are not repeated herein.

It will be apparent to those skilled in the art that the various modules or steps of the invention described above may be implemented using a general purpose computing device, they may be centralized on a single computing device or distributed across a network of computing devices, and they may be implemented using program code executable by the computing devices, such that they may be stored in a memory device and executed by the computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into various integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.

Claims (19)

1. A signal processing method, comprising:

determining a signal type of a received satellite signal, wherein the satellite signal comprises a Beidou satellite signal or a Global Positioning System (GPS) signal;

and processing the satellite signals based on the signal types to determine target signals, wherein the target signals are suitable for different types of terminal equipment.

2. The method of claim 1, wherein processing the satellite signals based on the signal type to determine a target signal comprises:

and under the condition that the satellite signals comprise the Beidou satellite signals, converting the Beidou satellite signals into GPS analog signals, and determining the target signals.

3. The method of claim 2, wherein in the event that the satellite signal is determined to comprise a Beidou satellite signal, converting the Beidou satellite signal to a GPS analog signal, determining the target signal, comprises:

analyzing signal information of the Beidou satellite signals, wherein the signal information comprises coordinate information and time information of Beidou satellite equipment;

performing time compensation processing on the Beidou satellite signal based on the signal information to obtain a compensation signal;

and converting the compensation signal into the GPS analog signal according to the format of the GPS signal to obtain the target signal.

4. The method of claim 3, wherein performing time compensation processing on the Beidou satellite signal based on the signal information to obtain a compensation signal comprises:

performing frequency offset calculation on the Beidou satellite signal to obtain a frequency compensation value;

calculating an absolute time compensation value by using the frequency compensation value and the local clock frequency offset;

acquiring an ephemeris of the Beidou satellite equipment, wherein the ephemeris comprises the signal information;

and compensating the error of the coordinate information of the Beidou satellite equipment in the ephemeris according to the absolute time compensation value to obtain the compensation signal.

5. The method of claim 1, wherein processing the satellite signals based on the signal type to determine a target signal comprises:

amplifying the GPS signal to obtain an amplified signal under the condition that the satellite signal is determined to comprise the GPS signal;

distributing the amplified signal to N terminal devices, wherein N is a natural number greater than or equal to 1.

6. The method of claim 1, wherein prior to determining the signal type of the received satellite signal, the method further comprises:

receiving M paths of signals through M paths of antenna equipment, wherein M is a natural number greater than or equal to 1;

coupling the M paths of signals to obtain the satellite signals;

and analyzing the coordinate information and the time information in the satellite signals.

7. The method of claim 1, further comprising:

monitoring an antenna device, wherein the antenna device is configured to receive the satellite signal;

and outputting prompt information under the condition that the antenna equipment is abnormal, wherein the prompt information is used for prompting the antenna equipment to be abnormal.

8. The method of claim 1, wherein the satellite signals are processed based on the signal type, and wherein after determining a target signal, the method further comprises:

under the condition that the satellite signals are determined to comprise Beidou satellite signals, analyzing coordinate information and time information in the Beidou satellite signals;

generating a GPS ephemeris according to the coordinate information and the time information;

converting the GPS ephemeris into a navigation message and a baseband signal;

modulating the baseband signal to a preset frequency point;

and outputting the navigation message and the baseband signal of the preset frequency point.

9. The method of claim 1, wherein the satellite signals are processed based on the signal type, and wherein after determining a target signal, the method further comprises:

and under the condition that the target signal is abnormal, clock information of an atomic clock in board-level equipment is acquired, wherein the clock information is used for simulating the time keeping precision of satellite equipment, and the clock information is generated through oscillation of the board-level equipment.

10. A signal processing system, comprising:

the receiving device is used for receiving satellite signals, wherein the satellite signals comprise Beidou satellite signals or Global Positioning System (GPS) signals;

the control device is used for determining the signal type of the received satellite signal, processing the satellite signal based on the signal type and determining a target signal, wherein the target signal is suitable for different types of terminal devices;

and the distribution equipment is used for distributing the target signal to N terminal equipment, wherein N is a natural number which is greater than or equal to 1.

11. The system of claim 10, wherein the control device comprises:

the analysis module is used for analyzing signal information of the Beidou satellite signals under the condition that the satellite signals are determined to comprise the Beidou satellite signals, wherein the signal information comprises coordinate information and time information of Beidou satellite equipment;

the time compensation module is used for performing time compensation processing on the Beidou satellite signal based on the signal information to obtain a compensation signal;

and the signal conversion module is used for converting the compensation signal into the GPS analog signal according to the format of the GPS signal to obtain the target signal.

12. The system of claim 11, wherein the time compensation module comprises:

the frequency offset calculation unit is used for performing frequency offset calculation on the Beidou satellite signal to obtain a frequency compensation value;

the synchronous compensation unit is used for calculating an absolute time compensation value by using the frequency compensation value and the local clock frequency offset;

and the channel simulation unit is used for acquiring an ephemeris of the Beidou satellite equipment and compensating an error of the coordinate information of the Beidou satellite equipment in the ephemeris according to the absolute time compensation value to obtain the compensation signal, wherein the ephemeris comprises the signal information.

13. The system of claim 11, wherein the control device further comprises:

the generating unit is used for generating a GPS ephemeris according to the coordinate information and the time information;

the conversion unit is used for converting the GPS ephemeris into a navigation message and a baseband signal;

the modulation unit is used for modulating the baseband signal to a preset frequency point;

and the output unit is used for outputting the navigation message and the baseband signal of the preset frequency point.

14. The system of claim 10, wherein the receiving device comprises:

a first antenna device for receiving the GPS signal;

and the second antenna equipment is used for receiving the Beidou satellite signals.

15. The system of claim 10, further comprising:

and the board level equipment is used for amplifying the GPS signal to obtain an amplified signal under the condition that the satellite signal is determined to comprise the GPS signal.

16. The system of claim 15, further comprising at least one of:

the atomic clock is connected with the board-level equipment and used for acquiring clock information oscillated by the board-level equipment under the condition that the target signal is abnormal, wherein the clock information is used for simulating the time keeping precision of the satellite equipment;

and the crystal oscillator is connected with the board-level equipment and is used for outputting the time information of the satellite equipment.

17. The system of claim 10, further comprising:

monitoring equipment for monitoring antenna equipment in the system, wherein the antenna equipment is used for receiving the satellite signals;

and the indicator light is used for outputting prompt information under the condition that the antenna equipment is abnormal, wherein the prompt information is used for prompting the antenna equipment to be abnormal.

18. A computer-readable storage medium, in which a computer program is stored, which computer program, when being executed by a processor, carries out the method of any one of claims 1 to 9.

19. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 1 to 9.

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