Beidou 3 # multi-model miniaturized positioning communication device and communication equipment

Abstract

The invention discloses a guide tracking method and system applied to a multi-antenna diversity receiver. The radio frequency front-end circuit is used for processing satellite signals through a power divider, a frequency divider and a filter and then sending the satellite signals to the radio frequency chip circuit; a short message signal sent by the radio frequency chip circuit is sent out after being processed by the temperature compensation attenuator and the low noise amplifier; the radio frequency chip circuit is used for performing down-conversion processing on satellite signals and performing up-conversion processing on short message signals; the baseband chip circuit is used for performing satellite signal acquisition, tracking, demodulation, dispreading, bit synchronization, frame synchronization, RDSS decoding, RNSS decoding and PVT resolving processing on the intermediate frequency signal transmitted by the radio frequency chip circuit, and outputting positioning communication information; and outputting a BPSK signal, the clock circuit is used for providing a clock; the power circuit is used for supplying power; the interface circuit is used for connecting external equipment. The scheme supports the Beidou to receive B1, B2, B3 frequency points and S frequency points and transmit L frequency points.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a BeiDou-3 multi-model miniaturized positioning communication device and communication equipment. Background Art

[0002] BeiDou-3 consists of 24 Medium Earth Orbit (MEO) satellites, 3 Geostationary Earth Orbit (GEO) satellites and 3 Inclined Geosynchronous Orbits (IGSO) satellites. It mainly adopts the satellite Radio Navigation Satellite System (RNSS) + regional short message / global short message communication system, integrating navigation and communication capabilities. It has excellent service performance and powerful functions. It has multiple service capabilities such as positioning, navigation and timing, satellite-based augmentation, ground-based augmentation, precise single point positioning, regional and global short message communication, and international search and rescue to meet the diverse application needs of users.

[0003] There is a huge market demand for integrated terminals and boards for the BeiDou-3 RNSS / Radio Determination Satellite Service (RDSS). At the same time, navigation equipment is trending towards miniaturization, low power consumption, and high integration. Designing a compact positioning communication board that supports BeiDou's B1, B2, B3, and S frequencies for reception and L frequency for transmission, while maintaining a compact form factor for easy integration, is a pressing technical challenge. Summary of the Invention

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a BeiDou-3 multi-model miniaturized positioning communication device and communication equipment.

[0005] The technical solution of the embodiment of the present invention is achieved as follows:

[0006] An embodiment of the present invention provides a BeiDou-3 multi-model miniaturized positioning and communication device, which is connected to an external antenna and includes a radio frequency front-end circuit, a radio frequency chip circuit, a baseband chip circuit, a clock circuit, a power supply circuit, and an interface circuit.

[0007] The RF front-end circuit is used to receive satellite signals from the antenna, and send the satellite signals to the RF chip circuit after processing through a power divider, a frequency divider and a filter; and send the short message signals sent by the RF chip circuit through a temperature-compensated attenuator and a low-noise amplifier after processing through the antenna;

[0008] The radio frequency chip circuit is used to perform down-conversion processing on the satellite signal sent by the radio frequency front-end circuit and up-conversion processing on the short message signal sent by the baseband chip circuit;

[0009] The baseband chip circuit is used to receive the intermediate frequency signal transmitted by the radio frequency chip circuit, perform satellite signal acquisition, tracking, demodulation, despreading, bit synchronization, frame synchronization, RDSS decoding, RNSS decoding and PVT solution processing, output positioning and communication information; and output BPSK signal to the radio frequency chip circuit;

[0010] The clock circuit is used to provide the clock required for operation;

[0011] The power supply circuit is used for supplying power;

[0012] The interface circuit is used to connect to external equipment.

[0013] In one embodiment, the radio frequency front-end circuit includes a signal receiving unit, a signal transmitting unit, and a feeding unit;

[0014] The signal receiving unit is configured to receive satellite signals from an antenna, divide the satellite signals into four frequency band signals using a power divider, filter the four frequency band signals through a filter, and input the signals into a radio frequency chip circuit; the four frequency band signals include the B1 and B3 frequency signals of the Beidou RNSS, the S frequency signal of the Beidou RDSS, and the B2 frequency signal of the global short message;

[0015] The signal transmitting unit is used to amplify the short message signal output by the radio frequency chip circuit through a temperature compensated attenuator and a low noise amplifier and then output it to the antenna for transmission;

[0016] The feeding unit is used to output power.

[0017] In one embodiment, the RF chip circuit includes four receiving channels, which are respectively used to receive the B1 and B3 frequency signals of the Beidou RNSS, the S frequency signal of the RDSS, and the B2 frequency signal of the global short message, and send the intermediate frequency signal after amplification, down-conversion and filtering to the baseband chip circuit for signal processing; the RF chip circuit also includes a transmitting channel, which is used to modulate the BPSK digital signal output by the baseband chip circuit through a temperature-compensated attenuator and a low-noise amplifier, up-convert it into the L frequency signal of the RDSS, and then send it to the RF front-end circuit for output.

[0018] In one embodiment, the baseband chip circuit includes an intermediate frequency AD conversion module, a telegram analysis module, an interface control module and a timing output module;

[0019] The intermediate frequency AD conversion module is used to receive the signal transmitted by the radio frequency chip circuit, perform AD conversion on the signal, and then transmit it to the telegram analysis module;

[0020] The telegram parsing module is used to perform communication telegram parsing on the input signal;

[0021] The interface control module is connected to the interface circuit and is used for inputting and outputting information;

[0022] The timing output module is used to output the received timing information through the second pulse output pin.

[0023] In one embodiment, the clock circuit includes two crystal oscillator circuits, which are respectively used to provide clocks for the radio frequency chip circuit and the baseband chip circuit.

[0024] In one embodiment, the two crystal oscillator circuits are a 20 MHz crystal oscillator and a 10 MHz crystal oscillator; the 20 MHz crystal oscillator provides a clock for the baseband chip circuit; and the 10 MHz crystal oscillator provides a clock for the radio frequency chip circuit.

[0025] An embodiment of the present invention also provides a communication device, which includes: an antenna and the BeiDou-3 multi-model miniaturized positioning communication device described above.

[0026] This embodiment has the following beneficial effects:

[0027] 1) Supports reception, positioning, speed measurement, and timing of BeiDou-2 and BeiDou-3 RNSS B1 and B3 frequency signals;

[0028] 2) Supports BeiDou-2 and BeiDou-3 RDSS S-frequency signal reception and Lf0~Lf3 frequency transmission;

[0029] 3) Supports B2 frequency signal reception and Lf4 frequency signal transmission of BeiDou-3 global short message;

[0030] 4) Support short message communication, positioning report, command and other functions;

[0031] 5) Support low power consumption;

[0032] 6) Support anti-interference processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of a BeiDou-3 multi-model miniaturized positioning and communication device according to an embodiment of the present invention;

[0034] Figure 2 This is a circuit diagram of the RNSS\RDSS receiving and transmitting circuit according to an embodiment of the present invention;

[0035] Figure 31 is a circuit diagram of a power supply circuit according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the dimensions of the BeiDou-3 multi-model miniaturized positioning and communication device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0038] The embodiment of the present invention provides a BeiDou-3 multi-model miniaturized positioning communication device, which is connected to an external antenna, such as Figure 1 As shown, the positioning communication device includes a radio frequency front-end circuit 101, a radio frequency chip circuit 102, a baseband chip circuit 103, a clock circuit 104, a power supply circuit 105 and an interface circuit 106:

[0039] The RF front-end circuit 101 is used to receive satellite signals from the antenna, process the satellite signals through a power divider, a frequency divider, and a filter, and then send them to the RF chip circuit 102; and process the short message signals sent by the RF chip circuit 102 through a temperature-compensated attenuator and a low-noise amplifier, and then send them out through the antenna;

[0040] The RF chip circuit 102 is used to down-convert the satellite signal sent by the RF front-end circuit 101 and up-convert the short message signal sent by the baseband chip circuit 103;

[0041] The baseband chip circuit 103 is used to receive the intermediate frequency signal transmitted by the radio frequency chip circuit 102, perform satellite signal acquisition, tracking, demodulation, despreading, bit synchronization, frame synchronization, RDSS decoding, RNSS decoding and PVT solution processing, output positioning and communication information; and output BPSK signal to the radio frequency chip circuit 102;

[0042] The clock circuit 104 is used to provide the clock required for operation;

[0043] The power supply circuit 105 is used for supplying power;

[0044] The interface circuit 106 is used to connect to external devices.

[0045] The BeiDou-3 multi-mode miniaturized positioning and communication device provided by the present invention is connected to an external antenna via a radio frequency front-end circuit 101. It receives satellite signals from the antenna, down-converts them through a power divider, a frequency divider, and a filter, converts them into intermediate frequency signals, and transmits them to a baseband chip circuit 103 for processing. Simultaneously, the short message signals output by the baseband chip circuit 103 undergo up-conversion, a temperature-compensated attenuator, and LNA amplification before being sent to the external antenna via the radio frequency front-end circuit 101 for transmission to the satellite.

[0046] Specifically, the RF front-end circuit 101 of this embodiment is connected to an external antenna and is used to receive satellite signals and send short message signals, and includes a signal receiving unit, a signal transmitting unit, and a feeding unit.

[0047] Among them, the signal receiving unit is used to receive satellite signals from the antenna, and use a power divider to divide the satellite signals into four frequency band signals (four frequency band signals of 1575.42Mhz, 1207.14Mhz, 1268.52MHz, and 2491.75MHz); and filter the four frequency band signals through a filter and input them into the RF chip circuit 102; the four frequency band signals include the B1 and B3 frequency signals of Beidou RNSS, the S frequency signal of Beidou RDSS, and the B2 frequency signal of the global short message; the signal transmitting unit is used to amplify the short message signal output by the RF chip circuit 102 through a temperature compensated attenuator and a low noise amplifier and then output it to the antenna for sending; the feeding unit is used to output DC+5V±5.5V feeding.

[0048] Here, the circuit diagram of the RNSS\RDSS receiving and transmitting circuit in the RF front-end circuit 101 is shown in FIG. Figure 2 .

[0049] The RF chip circuit 102 includes four receiving channels, which are respectively used to receive the B1 and B3 frequency signals of the Beidou RNSS, the S frequency signal of the RDSS, and the B2 frequency signal of the global short message, and send the intermediate frequency signal after amplification, down-conversion and filtering to the baseband chip circuit 103 for signal processing; the RF chip circuit 102 also includes a transmitting channel, which is used to modulate the BPSK digital signal output by the baseband chip circuit 103 through a temperature-compensated attenuator and a low-noise amplifier, up-convert it into the L frequency signal of the RDSS, and then send it to the RF front-end circuit 101 for output.

[0050] The baseband chip circuit 103 includes an intermediate frequency AD conversion module, a message analysis module, an interface control module and a timing output module.

[0051] Among them, the intermediate frequency AD conversion module is used to receive the signal transmitted by the radio frequency chip circuit 102, perform AD conversion, and then transmit it to the telegram analysis module; the telegram analysis module is used to perform communication telegram analysis on the input signal; the interface control module is connected to the interface circuit 106 and is used for input and output of information; the timing output module is used to output the received timing information through the second pulse output pin.

[0052] The clock circuit 104 includes two crystal oscillator circuits, which are used to provide clocks for the RF chip circuit 102 and the baseband chip circuit 103 respectively.

[0053] The two crystal oscillator circuits are a 20MHz crystal oscillator and a 10MHz crystal oscillator. The 20MHz crystal oscillator provides a clock for the baseband chip circuit 103, ensuring the normal operation of the internal ARM system. The 10MHz crystal oscillator provides a clock for the RF chip circuit 102. Based on this clock, the RF chip circuit 102 generates five channels of local oscillator signals through a PLL, and simultaneously generates a 62MHz sampling clock that is provided to the ADC and baseband module within the baseband chip circuit 103 for signal processing.

[0054] The power supply circuit 105 is responsible for supplying power to the RF chip circuit 102, the baseband chip circuit 103 and the peripheral circuits. Figure 3 The power input from the interface circuit 106 is converted into the required voltage by various power circuits and then connected to the chips inside the module to ensure the normal operation of the module.

[0055] The interface circuit 106 is responsible for connecting with external devices, including power supply, signal and data connections. External signals are connected to the chip in the module to ensure normal communication of signals. In order to reduce the size of the board and facilitate installation, a standard 75-core M.2 interface can be used. The external interface includes serial communication, reset signal, pulse-per-second output, RDSS SIM card interface, and antenna feed ANT_VCC. The serial port is LVTTL 3.3V level and supports baud rates such as 115200, 230400, and 460800 (the default baud rate is 115200). The baud rate can be configured through the serial port; the reset signal can reset the module through the nRESET pin, and the low level is valid; the pulse-per-second output defaults to output 1PPS after power-on positioning; the RDSS SIM card interface can be extended to connect an external RDSS SIM card through this port; the antenna feed ANT_VCC is externally powered to the antenna power input.

[0056] The BeiDou-3 multi-model miniaturized positioning and communication device provided by the present invention can support BeiDou-3 full-frequency RNSS B1 and B3 frequency signals and RDSS S regional short messages as well as global short message B2 frequency signals and L transmission frequency signals, providing positioning, speed measurement, timing, communication and search and rescue functions based on various dynamic conditions, and supporting RNSS and RDSS signal anti-narrowband interference and RNSS signal anti-transmitter deception interference. The device has a compact size of 40mm×30mm×4.7mm (see Figure 4 ), which is convenient for users to integrate and can be applied to various devices such as handheld, vehicle-mounted, portable, and ship-mounted.

[0057] The present invention also provides a communication device, comprising: an antenna and the BeiDou-3 multi-model miniaturized positioning and communication device. The communication device can be a vehicle-mounted, ship-mounted, handheld, or other device.

[0058] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0059] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A BeiDou-3 multi-model miniaturized positioning and communication device, characterized in that: The positioning communication device is connected to the external antenna, and the positioning communication device includes a radio frequency front-end circuit, a radio frequency chip circuit, a baseband chip circuit, a clock circuit, a power supply circuit and an interface circuit; The RF front-end circuit is used to receive satellite signals from the antenna, and send the satellite signals to the RF chip circuit after processing through a power divider, a frequency divider and a filter; and send the short message signals sent by the RF chip circuit through a temperature-compensated attenuator and a low-noise amplifier after processing through the antenna; The radio frequency chip circuit is used to perform down-conversion processing on the satellite signal sent by the radio frequency front-end circuit and up-conversion processing on the short message signal sent by the baseband chip circuit; The baseband chip circuit is used to receive the intermediate frequency signal transmitted by the radio frequency chip circuit, perform satellite signal acquisition, tracking, demodulation, despreading, bit synchronization, frame synchronization, RDSS decoding, RNSS decoding and PVT solution processing, and output positioning and communication information; And output BPSK signal to the RF chip circuit; The clock circuit is used to provide the clock required for operation; The power supply circuit is used for supplying power; The interface circuit is used to connect to external equipment.

2. The BeiDou-3 multi-model miniaturized positioning and communication device according to claim 1, characterized in that: The radio frequency front-end circuit includes a signal receiving unit, a signal transmitting unit and a feeding unit; The signal receiving unit is configured to receive satellite signals from an antenna, divide the satellite signals into four frequency band signals using a power divider, filter the four frequency band signals through a filter, and input the signals into a radio frequency chip circuit; the four frequency band signals include the B1 and B3 frequency signals of the Beidou RNSS, the S frequency signal of the Beidou RDSS, and the B2 frequency signal of the global short message; The signal transmitting unit is used to amplify the short message signal output by the radio frequency chip circuit through a temperature compensated attenuator and a low noise amplifier and then output it to the antenna for transmission; The feeding unit is used to output power.

3. The BeiDou-3 multi-model miniaturized positioning and communication device according to claim 1, characterized in that: The RF chip circuit includes four receiving channels, which are respectively used to receive the B1 and B3 frequency signals of Beidou RNSS, the S frequency signal of RDSS, and the B2 frequency signal of the global short message, and send the intermediate frequency signal after amplification, down-conversion and filtering to the baseband chip circuit for signal processing; the RF chip circuit also includes a transmitting channel, which is used to modulate the BPSK digital signal output by the baseband chip circuit through a temperature-compensated attenuator and a low-noise amplifier, up-convert it into the L frequency signal of RDSS, and then send it to the RF front-end circuit for output.

4. The BeiDou-3 multi-model miniaturized positioning and communication device according to claim 1, characterized in that: The baseband chip circuit includes an intermediate frequency AD conversion module, a telegram analysis module, an interface control module and a timing output module; The intermediate frequency AD conversion module is used to receive the signal transmitted by the radio frequency chip circuit, perform AD conversion on the signal, and then transmit it to the telegram analysis module; The telegram parsing module is used to perform communication telegram parsing on the input signal; The interface control module is connected to the interface circuit and is used for inputting and outputting information; The timing output module is used to output the received timing information through the second pulse output pin.

5. The BeiDou-3 multi-model miniaturized positioning and communication device according to claim 1, characterized in that: The clock circuit includes two crystal oscillator circuits, which are used to provide clocks for the radio frequency chip circuit and the baseband chip circuit respectively.

6. The BeiDou-3 multi-model miniaturized positioning and communication device according to claim 5, characterized in that: The two crystal oscillator circuits are a 20MHz crystal oscillator and a 10MHz crystal oscillator; the 20MHz crystal oscillator provides a clock for the baseband chip circuit; the 10MHz crystal oscillator provides a clock for the radio frequency chip circuit.

7. A communication device, characterized in that: The communication equipment includes: an antenna and the BeiDou-3 multi-model miniaturized positioning communication device as described in any one of claims 1-6.

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