CN112189378A

CN112189378A - Vehicle-mounted antenna system and communication method applied to same

Info

Publication number: CN112189378A
Application number: CN201980034793.XA
Authority: CN
Inventors: 彭勇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-01-21
Filing date: 2019-01-21
Publication date: 2021-01-05
Anticipated expiration: 2039-01-21
Also published as: WO2020150857A1; CN112189378B

Abstract

The application provides a vehicle-mounted antenna system, through for many transmitting circuit of a plurality of antenna configuration for when partial antenna is impaired, vehicle-mounted antenna system can directly utilize the transmitting circuit transmission signal of undamaged antenna and undamaged antenna, need not to use DPDT to switch transmitting circuit. Because the vehicle-mounted antenna system is provided with at least two transmitting circuits and at least two antennas, when the main antenna is damaged and the auxiliary antenna is not damaged, the auxiliary antenna can be communicated with the transmitting circuits without DPDT switching to transmit signals, so that the insertion loss caused by the introduction of DPDT can be avoided. In addition, because the DPDT is a device directly connected to the antenna, if the DPDT fails, the entire antenna system will not work, and thus, the reliability of the vehicle-mounted antenna system is also improved by avoiding using the DPDT.

Description

Vehicle-mounted antenna system and communication method applied to same

Technical Field

The present disclosure relates to the field of communications, and in particular, to a vehicle-mounted antenna system and a communication method applied to the vehicle-mounted antenna system.

Background

The vehicle-mounted antenna system is a communication system installed on an automobile and comprises an antenna and a transmitting and receiving circuit, when the automobile sends information, an electric signal is transmitted to the antenna through the transmitting circuit, and then the electric signal is converted into electromagnetic waves by the antenna to be sent out; when the automobile receives information, the antenna converts electromagnetic waves containing the information into electric signals and transmits the electric signals to the on-board processor through the receiving circuit.

The vehicle antenna system generally includes a plurality of antennas to improve reliability of the vehicle antenna system. For example, when a car accident occurs, even if some antennas are damaged, the remaining antennas can perform transmission and reception of information, so that rescue personnel can perform rescue.

The conventional vehicle-mounted antenna system realizes switching among a plurality of antennas through a dual-pole dual-throw (DPDT) switch, and when one antenna is damaged, a transmitting circuit is switched to a backup antenna through the DPDT switch to complete information transmission.

Disclosure of Invention

The application provides a vehicle-mounted antenna system, for many transmitting circuit of a plurality of antenna configuration for when partial antenna is impaired, vehicle-mounted antenna system can directly utilize the transmitting circuit transmission signal of undamaged antenna and undamaged antenna, need not to use DPDT to switch transmitting circuit, thereby has improved the communication quality when partial antenna is impaired.

In a first aspect, the present application provides a vehicle antenna system, comprising: the antenna comprises a main antenna, an auxiliary antenna and a multi-frequency multi-mode power amplifier (MMMPA), wherein the main antenna is connected with the MMMPA through a first transmitting circuit, and the auxiliary antenna is connected with the MMMPA through a second transmitting circuit; the second transmitting circuit includes at least one of the following three circuits: a Frequency Division Duplexing (FDD) transmitting circuit, the FDD transmitting circuit being connected to the auxiliary antenna through a duplexer, the duplexer being further configured to connect the FDD receiving circuit and the auxiliary antenna; a Time Division Duplex (TDD) transmitting circuit, which is connected with an auxiliary antenna through a Surface Acoustic Wave (SAW) filter; a global system for mobile communications (GSM) transmitting circuit.

Because the vehicle-mounted antenna system is provided with at least two transmitting circuits and at least two antennas, when the main antenna is damaged and the auxiliary antenna is not damaged, the auxiliary antenna can be communicated with the transmitting circuits without DPDT switching to transmit signals, so that the insertion loss caused by the introduction of DPDT can be avoided. In addition, because the DPDT is a device directly connected to the antenna, if the DPDT fails, the entire antenna system will not work, and thus, the reliability of the vehicle-mounted antenna system is also improved by avoiding using the DPDT.

In addition, the vehicle-mounted antenna system with the multiple transmitting circuits can adapt to different communication scenes, and when one frequency band is unavailable, the vehicle-mounted antenna system can switch the transmitting circuits to communicate through other frequency bands, so that the vehicle-mounted antenna system with the multiple transmitting circuits has higher reliability.

In one possible design, the vehicle antenna system further includes a TDD receive circuit; the TDD transmitting circuit comprises a Surface Acoustic Wave (SAW) filter and a single-pole double-throw (SPDT) switch, a common end of the SPDT is connected with the SAW filter, and two switching ends of the SPDT are respectively connected with the TDD transmitting circuit and the TDD receiving circuit.

The TDD transmitting circuit and the TDD receiving circuit share one SAW filter, so that the use amount of the SAW filter is reduced, and the cost of the radio frequency circuit is reduced.

In a second aspect, the present application provides another vehicle antenna system, comprising: the MMMPA antenna comprises a main antenna, an auxiliary antenna and an MMMPA, wherein the main antenna is connected with the MMMPA through a first transmitting circuit; the auxiliary antenna is connected with the MMMPA through a second transmitting circuit, and/or the auxiliary antenna is connected with the GSM transmitting circuit through a Front End Module (FEM); the FEM comprises a Power Amplifier (PA), wherein the PA is used for connecting an auxiliary antenna and a GSM transmitting circuit; the second transmitting circuit includes at least one of the following two circuits: the FDD transmitting circuit is connected with the auxiliary antenna through a duplexer, and the duplexer is also used for connecting the FDD receiving circuit and the auxiliary antenna; and the TDD transmitting circuit is connected with the auxiliary antenna through the SAW filter.

In one possible design, the vehicle antenna system further includes a TDD receive circuit and an SPDT; the common end of the SPDT is connected with the SAW filter, and two switching ends of the SPDT are respectively connected with the TDD transmitting circuit and the TDD receiving circuit.

In a third aspect, the present application provides a communication method applied to the vehicle-mounted antenna system of the first aspect, where the method includes: detecting whether the main antenna is normal; when the main antenna is abnormal, detecting whether the auxiliary antenna is normal; and when the auxiliary antenna is normal, transmitting a signal through the auxiliary antenna and the second transmitting circuit.

Because the vehicle-mounted antenna system is provided with at least two transmitting circuits and at least two antennas, when the main antenna is damaged and the auxiliary antenna is not damaged, signals can be transmitted through the auxiliary antenna and the transmitting circuit connected with the auxiliary antenna, the transmitting circuit does not need to be switched through the DPDT, and therefore insertion loss caused by the introduction of the DPDT can be avoided. In addition, because the DPDT is a device directly connected to the antenna, if the DPDT fails, the entire antenna system will not work, and thus, the reliability of the vehicle-mounted antenna system is also improved by avoiding using the DPDT.

In a fourth aspect, the present application provides a communication method applied to the vehicle-mounted antenna system of the second aspect, where the method includes: detecting whether the main antenna is normal; when the main antenna is abnormal, detecting whether the auxiliary antenna is normal; and when the auxiliary antenna is normal, transmitting a signal through the auxiliary antenna and the second transmitting circuit.

In a fifth aspect, the present application further provides a computer-readable storage medium having stored thereon a computer program, which, when executed by a processor of a vehicle antenna system, causes the processor to perform the method of the third or fourth aspect.

In a sixth aspect, the present application further provides a computer program product comprising: computer program code which, when executed by a processor of the vehicle antenna system, causes the processor to perform the method of the third or fourth aspect.

Drawings

FIG. 1 is a schematic illustration of a vehicle incorporating an antenna system provided herein;

FIG. 2 is a schematic diagram of a vehicle antenna system suitable for use in the present application;

FIG. 3 is a schematic diagram of another vehicle antenna system suitable for use with the present application;

FIG. 4 is a schematic diagram of a vehicle antenna system provided herein;

FIG. 5 is a schematic view of another vehicle antenna system provided herein;

FIG. 6 is a schematic view of yet another vehicle antenna system provided herein;

FIG. 7 is a schematic view of yet another vehicle antenna system provided herein;

FIG. 8 is a schematic view of yet another vehicle antenna system provided herein;

FIG. 9 is a schematic view of yet another vehicle antenna system provided herein;

FIG. 10 is a schematic illustration of yet another vehicle antenna system provided herein;

FIG. 11 is a schematic view of yet another vehicle antenna system provided herein;

FIG. 12 is a schematic view of yet another vehicle antenna system provided herein;

fig. 13 is a schematic diagram of a communication method based on a vehicle-mounted antenna system provided by the present application.

Detailed Description

Fig. 1 shows a schematic diagram of a vehicle including an antenna system provided herein.

The vehicle shown in fig. 1 is equipped with two antennas, antenna 1 and antenna 2, which can both be used for receiving and transmitting. In a normal state, the vehicle-mounted antenna system mainly performs transmission and reception through the antenna 1, and performs transmission and reception through the antenna 2 to improve transmission gain and reception gain, and therefore, the auxiliary antenna may also be referred to as a diversity antenna or a multiple-input multiple-output (MIMO) antenna.

The antenna system shown in fig. 1 is merely an example, and a vehicle-mounted antenna system suitable for use in the present application may further include a greater number of antennas. In addition, the shape and function of the antenna of the vehicle-mounted antenna system are not limited, for example, the antenna of the vehicle-mounted antenna system may be a one-dimensional antenna composed of metal wires, or may be a dish-shaped antenna; for another example, the antenna of the vehicle-mounted antenna system may be a microwave antenna or a long-wave antenna.

Fig. 2 is a schematic diagram of an on-board antenna system that can be applied to the vehicle shown in fig. 1.

In the vehicle-mounted antenna system shown in fig. 2, the main antenna is connected to a main transmission/reception path (main path for TX/RX) and a reception diversity path (div path for RX) via the DPDT, and the sub antenna is also connected to the main transmission/reception path) and the reception diversity path via the DPDT.

When the main antenna works normally, the DPDT connects the main antenna and the main transmission/reception path, the vehicle-mounted antenna system transmits signals through the main antenna and the main transmission/reception path, wherein the other two ends of the DPDT are connected with the auxiliary antenna and the reception diversity path, so that the vehicle-mounted antenna system receives signals through the auxiliary antenna and the reception diversity path, and the reception gain is improved.

When the main antenna cannot work normally, the DPDT switches the antenna connected with the main transmission/reception path from the main antenna to the auxiliary antenna, and the vehicle-mounted antenna system transmits signals through the auxiliary antenna and the main transmission/reception path, so that the reliability of the vehicle-mounted antenna system is improved.

Fig. 3 is a schematic diagram of another vehicle antenna system that can be used with the vehicle shown in fig. 1.

In the vehicle-mounted antenna system shown in fig. 3, the main antenna is connected to the transmission/reception main path and the reception MIMO path 2(MIMO path2 for RX) through the DPDT 1; the auxiliary antenna 2 is connected with the transmission/reception main path and the MIMO path2 through DPDT2 and DPDT1, and the auxiliary antenna 2 is connected with the reception MIMO path 3 through DPDT 2; the auxiliary antenna 3 is connected to the transmission/reception main path and the reception MIMO path2 through DPDT3, DPDT2, and DPDT1, the auxiliary antenna 3 is also connected to the reception MIMO path 3 through DPDT3 and DPDT2, and the auxiliary antenna 3 is also connected to the reception MIMO path 4 through DPDT 3; the secondary antenna 4 is connected to the transmission/reception main path and the reception MIMO path2 through DPDT3, DPDT2, and DPDT1, the secondary antenna 4 is also connected to the reception MIMO path 3 through DPDT3 and DPDT2, and the secondary antenna 4 is also connected to the reception MIMO path 4 through DPDT 3.

When the main antenna works normally, the DPDT1 connects the main antenna with the main transmission/reception path, and the vehicle-mounted antenna system transmits signals through the main antenna and the main transmission/reception path; the DPDT1 is further connected to a DPDT2 and a reception MIMO path2 so that the vehicle-mounted antenna system receives signals through the auxiliary antenna 2 to improve reception gain, wherein the DPDT2 is connected to the auxiliary antenna 2 and the DPDT 1; the DPDT2 connects the DPDT3 and the reception MIMO path 3 so that the vehicle-mounted antenna system receives signals through the auxiliary antenna 3 and the reception MIMO path 3, and improves reception gain, wherein the DPDT3 connects the auxiliary antenna 3 and the DPDT 2; the DPDT3 also connects the auxiliary antenna 4 and the reception MIMO path 4 so that the vehicle-mounted antenna system receives signals through the auxiliary antenna 4 and the reception MIMO path 4, improving reception gain.

When the main antenna cannot normally operate, the DPDT1 connects the DPDT2 with the transmission/reception main path, so that the secondary antenna 2, the secondary antenna 3, or the secondary antenna 4 is connected with the transmission/reception main path through the DPDT 1.

For example, when the main antenna cannot normally operate, and when the auxiliary antenna 2 normally operates, the vehicle-mounted antenna system may be connected with the transmission/reception main path through the DPDT2 and the DPDT1, and transmit signals through the auxiliary antenna 2 and the transmission/reception main path, thereby improving reliability of the vehicle-mounted antenna system.

For another example, when the main antenna and the auxiliary antenna 2 cannot normally operate, and when the auxiliary antenna 3 normally operates, the vehicle-mounted antenna system may switch one end of the DPDT2 from the reception MIMO path 3 to the DPDT1, and switch one end of the DPDT1 from the reception MIMO path2 to the transmission/reception main path, thereby connecting the auxiliary antenna 3 and the transmission/reception main path, and then, the vehicle-mounted antenna system transmits a signal through the auxiliary antenna 3 and the transmission/reception main path, improving the reliability of the vehicle-mounted antenna system.

Fig. 4 is a schematic diagram of a vehicle antenna system provided in the present application.

In the antenna system, a main antenna is connected with an MMMPA through a first transmitting circuit, and an auxiliary antenna is connected with the MMMPA through a second transmitting circuit. The circuit shown in fig. 4 may also contain other necessary components to implement the communication function.

For example, the MMMPA belongs to a Radio Frequency Integrated Circuit (RFIC), which may be connected to an Intermediate Frequency Integrated Circuit (IFIC), and is used to enhance an analog signal received from the IFIC so that the analog signal is transmitted to a further place through a main antenna or an auxiliary antenna in the form of an electromagnetic wave. The IFIC may be coupled to a baseband (baseband) chip for converting digital signals received from the baseband chip to analog signals.

When the vehicle-mounted antenna system receives signals, the main antenna or the auxiliary antenna converts electromagnetic waves into analog signals (current) through the receiving circuit and transmits the analog signals to the RFIC, the analog signals are processed by the RFIC and then transmitted to the IFIC, and the IFIC converts the analog signals into digital signals and transmits the digital signals to the baseband chip.

The RFIC and the IFIC may be composed of different devices, as shown in fig. 5.

After the baseband chip generates a digital signal, transmitting the digital signal to a modulator; the modulator converts the digital signal into an analog signal and transmits the analog signal to a mixer (mixer); the mixer is responsible for frequency conversion of the analog signal to meet the frequency requirements of different communication systems.

For example, if the vehicle-mounted antenna system needs to transmit a signal (i.e., a GSM signal) meeting the requirements of a GSM system, the mixer may convert the frequency of the analog signal to a frequency within the interval of 885 to 909 MHZ; if the vehicle-mounted antenna system needs to send a TDD signal meeting the requirement of a Long Term Evolution (LTE) system, the frequency mixer can convert the frequency of the analog signal to the frequency within the range of 1900-1920 MHZ; if the vehicle-mounted antenna system needs to send an FDD signal meeting the requirements of an LTE system, the frequency mixer can convert the frequency of the analog signal to the frequency within the range of 1920-1980 MHZ.

The frequency required by the mixer is provided by a synthesizer (synthesizer), and the frequency of the synthesizer may be provided by a Phase Locked Loop (PLL) and a Voltage Controlled Oscillator (VCO).

After frequency conversion processing is carried out on the analog signals by the mixer, the analog signals are transmitted to a Band Pass Filter (BPF), the BPF is used for filtering the analog signals of a specific frequency band, for example, when a vehicle-mounted antenna system needs to transmit GSM signals, only the analog signals with the frequency within the range of 885 to 909MHZ can be allowed to pass through, and the analog signals of other frequency bands can be filtered. The BPF then transmits the filtered analog signal to the MMMPA.

MMMPA performs power amplification processing on the analog signal, and transmits the analog signal to the transmitting receiver (transceiver) 1 through the first transmitting circuit, and/or transmits the analog signal to the transmitting receiver 2 through the second transmitting circuit. If the transceiver 1 receives an analog signal from the MMMPA, the analog signal is transmitted to the main antenna, and the main antenna emits the analog signal in the form of an electromagnetic wave. If the transceiver 2 receives an analog signal from the MMMPA, the analog signal is transmitted to the auxiliary antenna, and the auxiliary antenna transmits the analog signal in the form of an electromagnetic wave.

Because the on-vehicle antenna system that this application provided has two at least transmitting circuit and two at least antennas, consequently, when main antenna is impaired and the auxiliary antenna is not impaired, the auxiliary antenna can need not to transmit signal through DPDT handover circuit to can avoid introducing the insertion loss that the DPDT brought. Because the DPDT is a device directly connected with the antenna, if the DPDT fails, the whole antenna system cannot work, so that the use of the DPDT is avoided, and the reliability of the vehicle-mounted antenna system is also improved.

In addition, because the antenna system belongs to a complex system in the communication field, the antenna system not only needs reasonable layout and correct control logic design, but also needs debugging to work normally, and an automobile manufacturer belongs to a manufacturer in the mechanical field, and the use of the antenna system without the DPDT simplifies the architecture of the vehicle-mounted antenna system, so that the development cost and the maintenance cost of the automobile manufacturer can be reduced.

It should be noted that the above-mentioned embodiment is only an example, and should not be construed as limiting the vehicle-mounted antenna system provided in the present application. Any vehicle antenna system comprising at least two transmitting circuits and at least two antennas and without switching the different transmitting circuits falls within the scope of the present application.

The first and second transmit circuits may be the same type of transmit circuit, e.g., both GSM transmit circuits; the first transmitting circuit and the second transmitting circuit may also be different types of transmitting circuits, for example, the first transmitting circuit is a TDD transmitting circuit, and the second transmitting circuit is an FDD transmitting circuit. The GSM transmitting circuit is used for transmitting GSM radio-frequency signals, the TDD transmitting circuit is used for transmitting TDD radio-frequency signals, and the FDD transmitting circuit is used for transmitting FDD radio-frequency signals.

The TDD radio frequency signal may be a TDD radio frequency signal of a third generation (3th generation, 3G) mobile communication system, a TDD radio frequency signal of a fourth generation (4th generation, 4G) mobile communication system, a TDD radio frequency signal of a fifth generation (5th generation, 5G) mobile communication system, and a TDD radio frequency signal in a future mobile communication system.

Similarly, the FDD rf signal may be an FDD rf signal of a 3G mobile communication system, an FDD rf signal of a 4G mobile communication system, an FDD rf signal of a 5G mobile communication system, and an FDD rf signal in a future mobile communication system.

The vehicle-mounted antenna system with the multiple transmitting circuits can adapt to different communication scenes, and when one frequency band is unavailable, the vehicle-mounted antenna system can switch the transmitting circuits to communicate through other frequency bands, so that the vehicle-mounted antenna system with the multiple transmitting circuits has higher reliability.

While the foregoing describes the transmit circuitry of the vehicle antenna system, in some possible designs, the transmit circuitry of the vehicle antenna system may also be multiplexed by the receive circuitry.

Fig. 6 illustrates another vehicle antenna system provided by the present application.

In the antenna system, the first transmitting circuit comprises an FDD transmitting circuit 1 and an FDD receiving circuit 1, wherein the FDD transmitting circuit 1 and the FDD receiving circuit 1 are connected with a transmission receiver 1 through a duplexer (duplexer) 1; the second transmitting circuit includes an FDD transmitting circuit 2 and an FDD receiving circuit 2, wherein the FDD transmitting circuit 2 and the FDD receiving circuit 2 are connected to the transmission receiver 2 through the duplexer 2. The duplexer 1 is used for isolating the transmitting signal of the FDD transmitting circuit 1 from the receiving signal of the FDD receiving circuit 1, and the duplexer 2 is used for isolating the transmitting signal of the FDD transmitting circuit 2 from the receiving signal of the FDD receiving circuit 2. The MMMPA may be connected to the BPF, or to other devices.

The FDD transmitting circuit and the FDD receiving circuit share part of circuits, so that the vehicle-mounted antenna system simplifies the structure of a radio frequency circuit.

In addition to the FDD transmit circuit and FDD receive circuit sharing part of the circuitry, the TDD transmit circuit and TDD receive circuit may also share part of the circuitry.

As shown in fig. 7, the first transmission circuit includes a SAW filter 1, an SPDT1, a TDD transmission circuit 1, and a TDD reception circuit 1, and the SPDT1 is used to switch the TDD transmission circuit 1 and the TDD reception circuit 1. The SPDT1 comprises a common end and two switching ends, the common end is connected with the SAW filter 1, the two switching ends are respectively connected with the TDD transmitting circuit 1 and the TDD receiving circuit 1, when the vehicle-mounted antenna system transmits a TDD signal through the antenna 1, the SPDT1 connects the TDD transmitting circuit 1 and the SAW filter 1, and disconnects the TDD receiving circuit 1 and the SAW filter 1; when the vehicle-mounted antenna system receives a TDD signal through the antenna 1, the SPDT1 connects the TDD receiving circuit 1 and the SAW filter 1, and disconnects the TDD transmitting circuit 1 and the SAW filter 1.

The second transmitting circuit includes the SAW filter 2, the SPDT2, the TDD transmitting circuit 2, and the TDD receiving circuit 2, and the SPDT2 is used to switch the TDD transmitting circuit 2 and the TDD receiving circuit 2. The SPDT2 comprises a common end and two switching ends, the common end is connected with the SAW filter 2, the two switching ends are respectively connected with the TDD transmitting circuit 2 and the TDD receiving circuit 2, when the vehicle-mounted antenna system transmits a TDD signal through the antenna 2, the SPDT2 connects the TDD transmitting circuit 2 and the SAW filter 2, and disconnects the TDD receiving circuit 2 and the SAW filter 2; when the vehicle-mounted antenna system receives a TDD signal through the antenna 2, the SPDT2 connects the TDD receiving circuit 2 and the SAW filter 2, and disconnects the TDD transmitting circuit 2 and the SAW filter 2.

Because the TDD transmitting circuit and the TDD receiving circuit share part of the circuit, the vehicle-mounted antenna system simplifies the structure of the radio frequency circuit.

In the above example, the first transmitting circuit and the second transmitting circuit are both one circuit, and optionally, the first transmitting circuit may be a plurality of circuits, and the second transmitting circuit may also be a plurality of circuits. For example, the second transmit circuit may include at least two of a GSM transmit circuit, a TDD transmit circuit, and an FDD transmit circuit.

Fig. 8 shows a schematic diagram of a vehicle-mounted antenna in which the first transmitting circuit is one transmitting circuit and the second transmitting circuit is two transmitting circuits.

In the vehicle-mounted antenna system, the first transmitting circuit comprises an FDD transmitting circuit 1 and an FDD receiving circuit 1, wherein the FDD transmitting circuit 1 and the FDD receiving circuit 1 are connected with a transmission receiver 1 through a duplexer 1; the second transmitting circuit includes an FDD transmitting circuit 2 and an FDD receiving circuit 2, wherein the FDD transmitting circuit 2 and the FDD receiving circuit 2 are connected to the transmission receiver 2 through the duplexer 2. The second transmitting circuit also comprises a GSM transmitting circuit 2. Since the auxiliary antenna is connected to the two transmitting circuits, a switch for switching the transmitting circuit connected to the auxiliary antenna is required to be connected between the auxiliary antenna and the two transmitting circuits, and the switch is, for example, FEM2 integrated with the transmitting receiver.

Fig. 9 shows a schematic diagram of a vehicle-mounted antenna in which the first transmitting circuit is two transmitting circuits and the second transmitting circuit is two transmitting circuits. The difference from the vehicle-mounted antenna system shown in fig. 8 is that the first transmission circuit further includes the GSM transmission circuit 1 and the FEM1 integrated with the transmission receiver.

Fig. 10 and 11 show two other vehicle-mounted antenna systems provided by the present application, respectively.

In the two vehicle-mounted antenna systems, the first transmitting circuit is three transmitting circuits, and the second transmitting circuit is three transmitting circuits. The two vehicle-mounted antenna systems differ in that the TDD transmit circuit and the TDD receive circuit in the vehicle-mounted antenna system shown in fig. 11 multiplex the same SAW filter.

Fig. 12 is a further vehicle antenna system provided by the present application.

In the vehicle-mounted antenna system, the FEM1 and the FEM2 respectively contain PAs, so the GSM transmitting circuit 1 is not required to be connected with the MMMPA, but is connected with the PA in the FEM1, and the PA is used for amplifying the radio frequency signal output by the GSM transmitting circuit 1; similarly, the GSM transmit circuit 2 need not be connected to the MMMPA, but rather to a PA in the FEM2 for amplifying the radio frequency signal output by the GSM transmit circuit 2.

With any of the above-described vehicle-mounted antenna systems, after the vehicle-mounted antenna system is started, it can be determined which antenna is used for communication according to the method shown in fig. 13.

And S1301, detecting the working state of the main antenna.

When the working state of the main antenna is normal, transmitting a signal through the main antenna; when the operating state of the main antenna is abnormal, S1302 is performed.

S1302, detecting the working state of the auxiliary antenna.

When the working state of the auxiliary antenna is normal, transmitting a signal through the auxiliary antenna; when the working state of the auxiliary antenna is abnormal, other backup antennas can be switched.

It should be noted that in S1301, if the auxiliary antenna is normal, the vehicle-mounted antenna system may receive signals through the main antenna and the auxiliary antenna at the same time, so as to improve a gain of signal reception.

In the several embodiments provided in the present application, the disclosed system, apparatus and method can be implemented in other ways. For example, some features of the method embodiments described above may be omitted, or not performed. The above-described embodiments of the apparatus are merely exemplary, the division of the unit is only one logical function division, and there may be other division ways in actual implementation, and a plurality of units or components may be combined or integrated into another system. In addition, the coupling between the units or the coupling between the components may be direct coupling or indirect coupling, and the coupling includes electrical, mechanical or other connections.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In short, the above description is only a preferred embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

A vehicle-mounted antenna system is characterized by comprising a main antenna, an auxiliary antenna and a multi-frequency multi-mode power amplifier MMMPA,

the main antenna is connected with the MMMPA through a first transmitting circuit;

the auxiliary antenna is connected with the MMMPA through a second transmitting circuit;

the second transmitting circuit includes at least one of the following three circuits:

the frequency division duplex FDD transmitting circuit is connected with the auxiliary antenna through a duplexer, and the duplexer is also used for connecting an FDD receiving circuit and the auxiliary antenna;

the TDD transmitting circuit is connected with the auxiliary antenna through a Surface Acoustic Wave (SAW) filter;

global system for Mobile communications (GSM) transmitting circuits.
The vehicle antenna system of claim 1, further comprising a TDD receive circuit and a Single Pole Double Throw (SPDT) switch; and the common end of the SPDT is connected with the SAW filter, and two switching ends of the SPDT are respectively connected with the TDD transmitting circuit and the TDD receiving circuit.
A vehicle-mounted antenna system is characterized by comprising a main antenna, an auxiliary antenna and a multi-frequency multi-mode power amplifier MMMPA,

the main antenna is connected with the MMMPA through a first transmitting circuit;

the auxiliary antenna is connected with the MMMPA through a second transmitting circuit, and/or the auxiliary antenna is connected with a GSM transmitting circuit through a radio frequency front end module FEM;

the FEM comprises a power amplifier PA, and the PA is used for connecting the auxiliary antenna and the GSM transmitting circuit;

the second transmitting circuit includes at least one of the following two circuits:

the frequency division duplex FDD transmitting circuit is connected with the auxiliary antenna through a duplexer, and the duplexer is also used for connecting an FDD receiving circuit and the auxiliary antenna;

and the TDD transmitting circuit is connected with the auxiliary antenna through a Surface Acoustic Wave (SAW) filter.
The vehicle antenna system of claim 3, further comprising a TDD receive circuit and a SPDT switch; and the common end of the SPDT is connected with the SAW filter, and two switching ends of the SPDT are respectively connected with the TDD transmitting circuit and the TDD receiving circuit.
A communication method is characterized in that the communication method is applied to a vehicle-mounted antenna system, wherein the vehicle-mounted antenna system comprises a main antenna, an auxiliary antenna and a multi-frequency multi-mode power amplifier MMMPA; the main antenna is connected with the MMMPA through a first transmitting circuit; the auxiliary antenna is connected with the MMMPA through a second transmitting circuit; the second transmitting circuit includes at least one of the following three circuits: the frequency division duplex FDD transmitting circuit is connected with the auxiliary antenna through a duplexer, and the duplexer is also used for connecting an FDD receiving circuit and the auxiliary antenna; the TDD transmitting circuit is connected with the auxiliary antenna through a Surface Acoustic Wave (SAW) filter; a global system for mobile communications (GSM) transmitting circuit;

the method comprises the following steps:

detecting whether the main antenna is normal;

when the main antenna is abnormal, detecting whether the auxiliary antenna is normal;

and when the auxiliary antenna is normal, transmitting a signal through the auxiliary antenna and the second transmitting circuit.
The communication method according to claim 5, wherein the vehicle-mounted antenna system further comprises a TDD receiving circuit and a single-pole double-throw (SPDT) switch; the common end of the SPDT is connected with the SAW filter, and two switching ends of the SPDT are respectively connected with the TDD transmitting circuit and the TDD receiving circuit;

the transmitting a signal through the secondary antenna and the second transmitting circuit includes:

and transmitting signals through the auxiliary antenna and the TDD transmitting circuit.
The communications method of claim 6, wherein prior to transmitting signals via the secondary antenna and the TDD transmit circuit, the method further comprises:

switching a switch terminal of the SPDT from the TDD receive circuit to the TDD transmit circuit.
A communication method is characterized in that the communication method is applied to a vehicle-mounted antenna system, wherein the vehicle-mounted antenna system comprises a main antenna, an auxiliary antenna and a multi-frequency multi-mode power amplifier MMMPA; the main antenna is connected with the MMMPA through a first transmitting circuit; the auxiliary antenna is connected with the MMMPA through a second transmitting circuit, and/or the auxiliary antenna is connected with a GSM transmitting circuit through a radio frequency front end module FEM; the FEM comprises a power amplifier PA, and the PA is used for connecting the auxiliary antenna and the GSM transmitting circuit; the second transmitting circuit includes at least one of the following two circuits: the frequency division duplex FDD transmitting circuit is connected with the auxiliary antenna through a duplexer, and the duplexer is also used for connecting an FDD receiving circuit and the auxiliary antenna; the TDD transmitting circuit is connected with the auxiliary antenna through a Surface Acoustic Wave (SAW) filter;

the method comprises the following steps:

detecting whether the main antenna is normal;

when the main antenna is abnormal, detecting whether the auxiliary antenna is normal;

and when the auxiliary antenna is normal, transmitting signals through the auxiliary antenna and the second transmitting circuit, and/or transmitting signals through the auxiliary antenna and the GSM transmitting circuit.
The communication method according to claim 8, wherein the vehicle-mounted antenna system further comprises a TDD reception circuit and a single pole double throw switch SPDT; the common end of the SPDT is connected with the SAW filter, and two switching ends of the SPDT are respectively connected with the TDD transmitting circuit and the TDD receiving circuit;

the transmitting a signal through the secondary antenna and the second transmitting circuit includes:

and transmitting signals through the auxiliary antenna and the TDD transmitting circuit.
The communications method of claim 9, wherein prior to transmitting signals via the secondary antenna and the TDD transmit circuit, the method further comprises:

switching a switch terminal of the SPDT from the TDD receive circuit to the TDD transmit circuit.