A navigation communication device and system

Abstract

The embodiment of the present application provides a navigation communication device and system for realizing the coaxial transmission of radio frequency signals and serial port signals between a navigation antenna and a navigation receiver. The navigation communication device includes: a processor, an on-off keying modem transceiver, a power divider, multiple radio frequency interfaces and a serial port; the processor is electrically connected to the serial port and the on-off keying modem transceiver respectively, and the power divider is electrically connected to each radio frequency interface and the on-off keying modem transceiver respectively; one of the multiple radio frequency interfaces is electrically connected to the radio frequency port of the navigation antenna or the navigation receiver, and the remaining radio frequency interfaces are electrically connected to the transmission line for the coaxial transmission of radio frequency signals and serial port signals; the serial port is also electrically connected to the serial port of the navigation antenna or the navigation receiver; the on-off keying modem transceiver realizes the modulation or demodulation of the serial port signal under the control of the processor. The device reduces the number of transmission lines, improves the maintenance efficiency, and ensures the stable transmission of each signal.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a navigation communication device and system. Background Art

[0002] With the development of navigation technology, its all-weather, all-day, full coverage, multi-service and high reliability features make it increasingly widely used in the field of communication and navigation, and the development based on navigation technology is also attracting more and more attention.

[0003] As we all know, data transmission is crucial in the operation of navigation equipment. Only by ensuring stable and reliable data transmission can the entire system work properly. Usually, in the process of navigation information data transmission, satellite navigation signals and serial communication signals are often required to be transmitted through independent lines, which will bring many technical problems, such as high consumables cost, low maintenance efficiency and inconvenience in use. Summary of the invention

[0004] Based on this, the present application provides a navigation communication device and system that can realize coaxial transmission of multiple different types of signals.

[0005] In a first aspect, an embodiment of the present application provides a navigation communication device for realizing coaxial transmission of radio frequency signals and serial port signals between a navigation antenna and a navigation receiver, the navigation communication device comprising: a processor, a switch keying modem transceiver, a power splitter, a plurality of radio frequency interfaces and a serial port;

[0006] The processor is electrically connected to the serial port and the on-off keying modem transceiver respectively, and the power splitter is electrically connected to each radio frequency interface and the on-off keying modem transceiver respectively;

[0007] One of the multiple radio frequency interfaces is electrically connected to the radio frequency port of the navigation antenna or the navigation receiver, and the remaining radio frequency interfaces are electrically connected to a transmission line used for coaxial transmission of radio frequency signals and serial port signals;

[0008] The serial port is also electrically connected to the serial port of the navigation antenna or the navigation receiver;

[0009] The on-off keying modem transceiver realizes modulation or demodulation of the serial port signal under the control of the processor.

[0010] In one of the embodiments, it further includes: a crystal oscillator;

[0011] The crystal oscillator is electrically connected to the on-off keying modem transceiver and is used to provide a reference clock to the on-off keying modem transceiver.

[0012] In one embodiment, the crystal oscillator is a temperature compensated crystal oscillator or a constant temperature crystal oscillator.

[0013] In one of the embodiments, it further includes: a low dropout voltage regulator;

[0014] The low voltage dropout regulator is electrically connected to the processor and the on-off keying modem transceiver respectively, and is used to provide a stable direct current voltage to the processor and the on-off keying modem transceiver.

[0015] In one of the embodiments, it also includes: a stamp hole welded bottom plate;

[0016] The stamp hole welding type bottom plate is used for carrying the transmission of radio frequency signals and serial port signals.

[0017] In one embodiment, the processor is further configured to control the on-off keying modem transceiver to switch between a plurality of baud rate modes.

[0018] In one of the embodiments, the processor is further used to cache the acquired serial port data to be sent when the navigation communication device is in a serial port data receiving state, and send the cached serial port data to be sent after the serial port data is received, so as to realize the sending and receiving control of the serial port data.

[0019] In one of the embodiments, the serial port data buffer is implemented by a ring buffer or a circular linked list.

[0020] In one of the embodiments, it further includes: a power interface, through which power is provided to the navigation communication device.

[0021] In a second aspect, an embodiment of the present application provides a navigation communication system, including: a navigation antenna, a navigation receiver, a first navigation communication device, and a second navigation communication device;

[0022] Wherein, the navigation antenna is electrically connected to the first navigation communication device, the navigation receiver is electrically connected to the second navigation device, and the first navigation communication device is electrically connected to the second navigation communication device via a transmission line;

[0023] The first navigation and communication device and the second navigation and communication device are the navigation and communication devices provided in the first aspect of the embodiment of the present application.

[0024] The navigation communication device and system provided in the embodiment of the present application include a device for realizing the coaxial transmission of the RF signal and the serial port signal between the navigation antenna and the navigation receiver, and the navigation communication device includes: a processor, an on-off keying modem transceiver, a power divider, a plurality of RF interfaces and a serial port; wherein the processor is electrically connected to the serial port and the on-off keying modem transceiver respectively, and the power divider is electrically connected to each RF interface and the on-off keying modem transceiver respectively; one of the plurality of RF interfaces is electrically connected to the RF output of the navigation antenna or the navigation receiver, and the remaining RF interfaces are electrically connected to the transmission line for the coaxial transmission of the RF signal and the serial port signal; the serial port is also electrically connected to the serial port of the navigation antenna or the navigation receiver; the on-off keying modem transceiver realizes the modulation or demodulation of the serial port signal under the control of the processor. Thus, the above-mentioned navigation communication device is respectively arranged on the navigation antenna side and the navigation receiver side, and the coaxial transmission of the RF signal and the serial port signal between the navigation antenna and the navigation receiver is realized through the navigation communication device, which reduces the number of transmission lines, improves the maintenance efficiency, and ensures the distortion-free transmission of the RF signal and the serial port signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a navigation communication device provided in an embodiment of the present application;

[0026] Figure 2 Another structural diagram of a navigation communication device provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of another structure of the navigation communication device provided in the embodiment of the present application;

[0028] Figure 4 A schematic diagram of the structure of a navigation communication system provided in an embodiment of the present application;

[0029] Description of reference numerals:

[0030] 101: processor; 102: on / off keying modem transceiver; 103: power divider;

[0031] 104: RF interface; 105: serial port; 106: crystal oscillator;

[0032] 107: low voltage dropout regulator; 108: stamp hole welded bottom plate; 401: navigation antenna;

[0033] 402: navigation receiver; 403: first navigation communication device; 404: second navigation communication device; 405: transmission line. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present application more clear, the technical solution in the embodiments of the present application is further described in detail through the following embodiments and in combination with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

[0035] At present, in the process of data interaction between the navigation antenna and the navigation receiver, in addition to transmitting the navigation radio frequency signal, it is also necessary to interact with the serial port signal (for example, the serial port signal can be the instruction information between the navigation antenna and the navigation receiver, etc.). Therefore, in the prior art, multiple lines are often set between the navigation antenna and the navigation receiver, which are used to transmit the navigation radio frequency signal and the serial port signal respectively. In addition, there are various interference signals in the environment where the navigation antenna is located. While affecting the reception of the satellite navigation radio frequency signal, it may also affect the serial port data communication between the navigation antenna and the navigation receiver. To this end, the embodiment of the present application provides a navigation communication device. By respectively setting the navigation communication device at the navigation antenna and the navigation receiver, the coaxial transmission of the navigation radio frequency signal and the serial port signal between the navigation antenna and the navigation receiver can be realized, which not only effectively utilizes the radio frequency signal transmission bandwidth, but also can transmit the serial port signal, so that the data transmission is stable and the signal is not lost in harsh environments, and the number of transmission lines is reduced, thereby improving the efficiency of later maintenance.

[0036] Next, the navigation communication device is introduced in detail:

[0037] Figure 1 A structural diagram of a navigation communication device provided in an embodiment of the present application. The navigation communication device is used to realize the coaxial transmission of radio frequency signals and serial port signals between the navigation antenna and the navigation receiver, such as Figure 1 As shown, the navigation communication device may include: a processor 101 , an on-off keying modem transceiver 102 , a power divider 103 , a plurality of radio frequency interfaces 104 and a serial port 105 .

[0038] Specifically, the processor 101 is electrically connected to the serial port 105 and the on-off keying modem transceiver 102 , respectively, and the power divider 103 is electrically connected to each RF interface 104 and the on-off keying modem transceiver 102 , respectively.

[0039] Optionally, the processor 101 can be implemented by chip circuits such as Field Programmable Gate Array (FPGA), Digital Signal Processing (DSP), ARM processor (Advanced RISC Machines), etc. The on-off keying modem transceiver 102 can modulate or demodulate the serial port signal.

[0040] In practical applications, the on-off keying modem transceiver 102 can operate in a variety of baud rate modes, for example, the baud rate modes may include 9600bps, 38400bps, and 115200bps, etc. The processor 101 may also control the on-off keying modem transceiver 102 to switch between the multiple baud rate modes, so that the on-off keying modem transceiver 102 operates in a specified baud rate mode.

[0041] Furthermore, one of the multiple RF interfaces 104 is electrically connected to a RF port of a navigation antenna or a navigation receiver, and the remaining RF interfaces 104 are electrically connected to a transmission line for coaxial transmission of RF signals and serial port signals.

[0042] Among them, taking the navigation communication device arranged on the navigation antenna side as an example, one of the multiple RF interfaces 104 of the navigation communication device is electrically connected to the RF output of the navigation antenna, and the remaining RF interfaces 104 are electrically connected to the navigation communication device arranged on the navigation receiver side through transmission lines.

[0043] Taking the navigation communication device arranged at the navigation receiver side as an example, one of the multiple RF interfaces 104 of the navigation communication device is electrically connected to the RF input of the navigation receiver, and the remaining RF interfaces 104 are electrically connected to the navigation communication device arranged at the navigation antenna side through transmission lines.

[0044] In this way, the RF signal received by the navigation antenna can be transmitted to the RF interface 104 of the navigation communication device through the RF output of the navigation antenna, and the received RF signal is transmitted to another RF interface 104 through the power divider 103 through the RF interface 104, and then the RF signal is output to the navigation communication device set on the navigation receiver side through the other RF interface 104, and then the RF signal is transmitted to the navigation receiver. Optionally, the above-mentioned RF signal can be a signal for realizing the navigation positioning function.

[0045] Furthermore, the serial port 105 is not only electrically connected to the processor 101 , but also electrically connected to the serial port of the navigation antenna or the navigation receiver. The on-off keying modem transceiver 102 implements modulation or demodulation of the serial port signal under the control of the processor 101 .

[0046] Among them, for the navigation communication device arranged at the navigation antenna side, one end of the serial port 105 is electrically connected to the serial port of the navigation antenna, and the other end is electrically connected to the processor 102, for receiving the serial port signal of the navigation antenna, and transmitting the received serial port signal to the processor 101, and then modulating the serial port signal through the on-off keying modem transceiver 102 under the control of the processor 101, and then transmitting the modulated serial port signal to the navigation receiver through another radio frequency interface 104 in the navigation communication device. In another embodiment, the navigation communication device arranged at the navigation receiver side receives the modulated serial port signal, and after demodulation by the on-off keying modem transceiver 102 in the navigation communication device, the serial port signal is transmitted to the navigation receiver by the corresponding serial port 105.

[0047] For the navigation communication device arranged at the navigation receiving side, one end of the serial port 105 is electrically connected to the serial port of the navigation receiver, and the other end is electrically connected to the processor 102, for receiving the serial port signal of the navigation receiver, and transmitting the received serial port signal to the processor 101, and then modulating the serial port signal through the on-off keying modem transceiver 102 under the control of the processor 101, and then transmitting the modulated serial port signal to the navigation antenna through another radio frequency interface 104 of the navigation communication device. In another embodiment, the navigation communication device arranged at the navigation antenna side receives the modulated signal, and after demodulation by the on-off keying modem transceiver 102, it is transmitted to the navigation antenna through the corresponding serial port 105. It can be seen that through the above-mentioned navigation communication device, the coaxial transmission of the radio frequency signal and the serial port signal between the navigation antenna and the navigation receiver can be realized.

[0048] The navigation communication device provided in the embodiment of the present application includes a device for realizing the coaxial transmission of the RF signal and the serial port signal between the navigation antenna and the navigation receiver, and the navigation communication device includes: a processor, an on-off keying modem transceiver, a power divider, a plurality of RF interfaces and a serial port; wherein the processor is electrically connected to the serial port and the on-off keying modem transceiver respectively, and the power divider is electrically connected to each RF interface and the on-off keying modem transceiver respectively; one of the plurality of RF interfaces is electrically connected to the RF output of the navigation antenna or the navigation receiver, and the remaining RF interfaces are electrically connected to the transmission line for the coaxial transmission of the RF signal and the serial port signal; the serial port is also electrically connected to the serial port of the navigation antenna or the navigation receiver; the on-off keying modem transceiver realizes the modulation or demodulation of the serial port signal under the control of the processor. Thus, the above-mentioned navigation communication device is respectively arranged on the navigation antenna side and the navigation receiver side, and the coaxial transmission of the RF signal and the serial port signal between the navigation antenna and the navigation receiver is realized through the navigation communication device, which reduces the number of transmission lines, improves the maintenance efficiency, and ensures the distortion-free transmission of the RF signal and the serial port signal.

[0049] As an optional implementation, the reference clock required for the modulation and demodulation process of the on-off keying modem transceiver 102 can be provided by an external device. As another optional implementation, a circuit for generating a clock signal can also be integrated in the navigation communication device. Figure 2 As shown, the navigation communication device may further include a crystal oscillator 106. The crystal oscillator 106 is electrically connected to the on-off keying modem transceiver 102, and is used to provide a reference clock to the on-off keying modem transceiver 102. For example, the crystal oscillator 106 may provide a clock with a frequency of 8.704 MHz to the on-off keying modem transceiver 102, so that the on-off keying modem transceiver 102 can modulate and demodulate the serial port signal according to the clock frequency.

[0050] Optionally, the crystal oscillator 106 may be a temperature compensated crystal oscillator or a constant temperature crystal oscillator, or other types of crystal oscillators, which is not limited in this embodiment.

[0051] Optionally, the navigation and communication device may further include a power interface, through which an external power source provides power to the navigation and communication device.

[0052] Further, optionally, as Figure 3 As shown, the navigation communication device may further include a low voltage dropout regulator 107. The low voltage dropout regulator 107 is electrically connected to the processor 101 and the on-off keying modem transceiver 102, respectively, and is used to provide a stable DC voltage to the processor 101 and the on-off keying modem transceiver 102.

[0053] Exemplarily, the low voltage dropout regulator 107 can convert the 5V DC input of the power interface into a DC output of 3.3V, which is provided to the processor 101 and the switch keying modem transceiver 102 as power input, thereby ensuring the stability of the power supply of the navigation communication device.

[0054] Further, optionally, the navigation communication device may also include a stamp hole welding type bottom plate 108, and the stamp hole welding type bottom plate 108 is used to carry the transmission of radio frequency signals and serial port signals. In other words, the processor 101, the on-off keying modem transceiver 102, the power divider 103, the plurality of radio frequency interfaces 104, the serial port 105, the crystal oscillator 106, and the low voltage dropout regulator 107 are all carried on the stamp hole welding type bottom plate 108.

[0055] By adopting a stamp hole welding type bottom plate to carry the transmission of radio frequency signals and serial port signals, the area of ​​the printed circuit board (PCB) can be used more efficiently and the cost of the navigation communication device can be reduced.

[0056] In one embodiment, optionally, the processor 101 can also provide a data buffer function, that is, the processor 101 is also used to cache the acquired serial port data to be sent when the navigation communication device is in a serial port data receiving state, and send the cached serial port data to be sent after the serial port data is received, so as to realize the sending and receiving control of the serial port data.

[0057] Usually, the serial port data on the transmission line of the navigation communication device at the same time is unidirectionally transmitted. If the transmission line is receiving serial port data, the serial port 105 needs to send serial port data and has transmitted the serial port data to the processor 101. At this time, the processor 101 can put the data to be sent into the buffer for temporary storage. After the serial port data is received, the navigation communication device is immediately controlled to enter the sending state, that is, the on-off keying modem transceiver 102 can be controlled to switch from the demodulation mode to the modulation mode, and the data to be sent is sent out from the buffer, thereby realizing the "buffered-virtual full-duplex" state operation of the navigation communication device. Optionally, the buffer of the serial port data can be realized by a ring buffer or by a circular linked list. By buffering the serial port data before sending it, the serial port data is guaranteed to be continuous and not lost, and the stability of the coaxial data transmission is achieved.

[0058] In one embodiment, after the navigation communication device is powered on, the processor 101 can initialize the navigation communication device, which can include parameter initialization, serial port initialization and interrupt initialization. During parameter initialization, the processor 101 can set the currently started serial port baud rate according to the historical baud rate.

[0059] The processor 101 may also detect the serial port status. If a serial port interruption is detected, the serial port data received by the serial port may be stored in a buffer. The buffer may be implemented by a ring buffer or a circular linked list.

[0060] The processor 101 can also determine whether the on-off keying modem transceiver 102 is idle when it needs to send serial port data. If so, it can immediately enter the sending state, modulate the serial port data to be sent in the buffer through the on-off keying modem transceiver 102, and then send it. If the on-off keying modem transceiver 102 is not in the idle state, it means that the link is in the receiving state. In this case, the processor 101 will store the received serial port data to be sent in the buffer until the link is idle before sending it.

[0061] The processor 101 can also perform a reset operation when the system operates abnormally or the on / off keying modem transceiver 102 operates abnormally, to ensure that the system does not freeze during operation.

[0062] In one embodiment, Figure 4As shown, a navigation communication system is also provided. The navigation communication system includes a navigation antenna 401 , a navigation receiver 402 , a first navigation communication device 403 and a second navigation communication device 404 .

[0063] Specifically, the navigation antenna 401 is electrically connected to the first navigation communication device 403, that is, the radio frequency interface of the navigation antenna 401 is electrically connected to the radio frequency interface of the first navigation communication device 403, and the serial port of the navigation antenna 401 is electrically connected to the serial port of the first navigation communication device 403; the navigation receiver 402 is electrically connected to the second navigation communication device 404, that is, the radio frequency interface of the navigation receiver 402 is electrically connected to the radio frequency interface of the second navigation communication device 404, and the serial port of the navigation receiver 402 is electrically connected to the serial port of the second navigation communication device 404; the first navigation communication device 403 is electrically connected to the second navigation communication device 404 via the transmission line 405, thereby realizing the coaxial transmission of the radio frequency signal and the serial port signal between the navigation antenna 401 and the navigation receiver 402.

[0064] Among them, the first navigation communication device 403 can be a navigation communication device set at the navigation antenna 401, and the second navigation communication device 404 can be a navigation communication device set at the navigation receiver 402. The first navigation communication device 401 and the second navigation communication device 404 are navigation communication devices provided by any of the above-mentioned implementations. The specific working principle can refer to the process described in any of the above-mentioned embodiments, and this embodiment will not be repeated here.

[0065] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A navigation communication device, characterized in that: Used to realize the coaxial transmission of radio frequency signals and serial port signals between the navigation antenna and the navigation receiver, the navigation communication device includes: a processor, a switch keying modem transceiver, a power divider, a plurality of radio frequency interfaces and a serial port; The processor is electrically connected to the serial port and the on-off keying modem transceiver respectively, and the power splitter is electrically connected to each radio frequency interface and the on-off keying modem transceiver respectively; One of the multiple radio frequency interfaces is electrically connected to the radio frequency port of the navigation antenna or the navigation receiver, and the remaining radio frequency interfaces are electrically connected to a transmission line used for coaxial transmission of radio frequency signals and serial port signals; The serial port is also electrically connected to the serial port of the navigation antenna or the navigation receiver; The on-off keying modem transceiver realizes modulation or demodulation of the serial port signal under the control of the processor.

2. The navigation communication device according to claim 1, characterized in that: Also includes: Crystal oscillator; The crystal oscillator is electrically connected to the on-off keying modem transceiver and is used to provide a reference clock to the on-off keying modem transceiver.

3. The navigation communication device according to claim 2, characterized in that: The crystal oscillator is a temperature compensated crystal oscillator or a constant temperature crystal oscillator.

4. The navigation communication device according to claim 1, characterized in that: Also includes: Low dropout voltage regulator; The low voltage dropout regulator is electrically connected to the processor and the on-off keying modem transceiver respectively, and is used to provide a stable direct current voltage to the processor and the on-off keying modem transceiver.

5. The navigation communication device according to claim 1, characterized in that: Also includes: Stamp hole welded bottom plate; The stamp hole welding type bottom plate is used for carrying the transmission of radio frequency signals and serial port signals.

6. The navigation communication device according to claim 1, characterized in that: The processor is also used to control the on-off keying modem transceiver to switch between multiple baud rate modes.

7. The navigation communication device according to claim 1, characterized in that: The processor is also used to cache the acquired serial port data to be sent when the navigation communication device is in a serial port data receiving state, and send the cached serial port data to be sent after the serial port data is received, so as to realize the sending and receiving control of the serial port data.

8. The navigation communication device according to claim 7, characterized in that: The buffer of the serial port data is implemented by a ring buffer or a circular linked list.

9. The navigation communication device according to claim 1, characterized in that: Also includes: A power interface is used to provide power to the navigation communication device.

10. A navigation communication system, characterized in that: include: A navigation antenna, a navigation receiver, a first navigation communication device and a second navigation communication device; Wherein, the navigation antenna is electrically connected to the first navigation communication device, the navigation receiver is electrically connected to the second navigation communication device, and the first navigation communication device is electrically connected to the second navigation communication device via a transmission line; The first navigation communication device and the second navigation communication device are the navigation communication devices according to any one of claims 1 to 9.

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