CN114696865A

CN114696865A - Wireless communication device and control method thereof

Info

Publication number: CN114696865A
Application number: CN202210327016.8A
Authority: CN
Inventors: 刘玉岩
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-07-01

Abstract

A wireless communication apparatus and a control method thereof are provided. The wireless communication apparatus includes: the first radio frequency circuit is used for receiving and transmitting a first communication signal; the second radio frequency circuit is used for receiving and transmitting a second communication signal; the GPS module is provided with a receiving channel, and the receiving channel is connected with an adjustable filter circuit; and the control circuit is used for adjusting the filtering parameter of the adjustable filtering circuit according to the current working frequency band of the first radio frequency circuit, so that the adjustable filtering circuit filters the first communication signal, and the interference of the coupling signal of the first communication signal and the second communication signal to the GPS module is avoided. In the embodiment of the application, the filtering parameters of the adjustable filtering circuit are adjusted according to the current working frequency band of the signal of the first radio frequency circuit, so that the adjustable filtering circuit filters the signal of the first radio frequency circuit, the interference of the coupling signal of the signals of the two radio frequency circuits on the GPS module is avoided, the filtering network of a GPS channel is simplified, and the cost and the design complexity are optimized.

Description

Wireless communication device and control method thereof

Technical Field

The present embodiments relate to the field of wireless communication technologies, and more particularly, to a wireless communication apparatus and a control method thereof.

Background

In recent years, wireless communication technology has become more widely used. Some wireless communication devices include a GPS module and a plurality of radio frequency circuits. When two rf circuits are transmitting simultaneously, the coupling signal generated by the signals of the two rf circuits may interfere with the GPS signal. To suppress this interference, the related art introduces multiple filtering circuits on the GPS path, where each filtering circuit can be used to filter out a coupled signal.

However, the frequency bands of the signals of the two rf circuits are very many in combination, and therefore the coupling signals of the two rf circuits are also very many. In order to filter out various types of coupled signals generated by different frequency band combination modes, the structure of the filter circuit provided by the related art is complex, and the filter circuit with the complex structure still cannot meet the requirement of multi-band filtering.

Disclosure of Invention

The embodiment of the application provides a wireless communication device and a control method thereof, which are used for simplifying a filter circuit and adapting to the requirements of multi-band filtering.

In a first aspect, a wireless communication apparatus is provided, including: the first radio frequency circuit is used for receiving and transmitting a first communication signal; the second radio frequency circuit is used for receiving and transmitting a second communication signal; the GPS module is provided with a receiving path, and the receiving path is connected with an adjustable filter circuit; and the control circuit is used for adjusting the filtering parameter of the adjustable filtering circuit according to the current working frequency band of the first radio frequency circuit, so that the adjustable filtering circuit filters the first communication signal, and the interference of the coupling signal of the first communication signal and the second communication signal to the GPS module is avoided.

In a second aspect, a method for controlling a wireless communication apparatus is provided, including: and adjusting the filtering parameter of the adjustable filtering circuit according to the current working frequency band of a first radio frequency circuit of the wireless communication device, so that the adjustable filtering circuit filters the first communication signal, and the interference of the coupling signal of the first communication signal and the second communication signal to the GPS module is avoided.

The embodiment of the application introduces the adjustable filter with adjustable filter parameters, and dynamically adjusts the filter parameters of the adjustable filter based on the current working frequency band of the first radio frequency circuit. Compared with the filter circuit with fixed filter parameters adopted by the related technology, independent filters do not need to be configured for each type of coupled signals, so that the structural complexity of the filter circuit can be reduced, and the requirement of multi-band filtering can be met.

Drawings

Fig. 1 is a schematic diagram of a wireless communication device provided in the related art and having a plurality of sets of LC filter circuits.

Fig. 2 is a schematic diagram of a wireless communication apparatus according to an embodiment of the present application.

Fig. 3 is a flowchart illustrating a method for controlling a wireless communication apparatus according to an embodiment of the present disclosure.

Fig. 4 is a flowchart illustrating another method for controlling a wireless communication apparatus according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

In recent years, with the development of communication technology, wireless communication devices are becoming more widely used. Wireless communication devices typically include a baseband system and a radio frequency system. The baseband system is used for generating a baseband signal, and the radio frequency system is used for converting the baseband signal into a radio frequency signal so as to transmit the radio frequency signal into a wireless channel through an antenna.

The wireless communication device mentioned in the embodiments of the present application may refer to a device providing voice and/or data connectivity to a user, and may be used for connecting people, things and machines, such as a handheld device having a wireless connection function, a vehicle-mounted device, and the like. The wireless communication device in the embodiment of the present application may be, for example, a mobile phone (mobile phone), a tablet computer (Pad), a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like.

Some wireless communication devices also have a GPS module, such as a cellular phone that includes a cellular communication module and a GPS module. The GPS module can be used for passive positioning, which receives, demodulates, like a "radio" the broadcast signals of the satellites and does not transmit signals. The GPS module may include an RF radio frequency chip and associated peripheral circuitry. Usually, the GPS module has a parameter with a channel number, for example, 20 channels, which indicates that the module can establish communication with 20 satellites at the same time at the maximum, 3 satellites are 2D positioning, and data is unstable, and the module only calculates pseudo distances from each satellite after receiving more than 3 satellite signals at the same time, and calculates four parameters of longitude, latitude, altitude, and time correction of the receiver by using a distance intersection method, so as to obtain correct positioning data. If the number of satellites in simultaneous communication is larger, the module can acquire positioning data more quickly and accurately.

Some wireless communication devices have rf systems with multiple rf circuits. When two rf circuits operate simultaneously, the coupling signal generated by the signals of the two rf circuits may interfere with the GPS module signal.

The coupled signal mentioned in the embodiments of the present application may refer to a signal obtained after signals of two or more radio frequency circuits (or derivatives of signals of radio frequency circuits) are modulated with each other. In some embodiments, the coupling signal mentioned in the embodiments of the present application may include an intermodulation signal and/or an intermodulation signal generated by signals of two radio frequency circuits. The intermodulation signal may refer to a second order intermodulation signal and/or a third order intermodulation signal. Of course, the intermodulation signals may also include higher order intermodulation signals. An intermodulation signal may refer to a wanted signal generated by the interaction between signals in a non-linear device, network, or transmission medium, which modulates the carrier of the wanted signal. The intermodulation signal and the intermodulation signal will interfere the useful signal and should be reduced as much as possible.

For the convenience of understanding, the following takes a wireless communication device in a non-standalone (NSA) scenario applied in a New Radio (NR) as an example, to illustrate the interference problem of the coupling signal of two radio frequency circuits to the GPS module signal.

Nowadays, cellular communication modules of mobile phones usually support different standard systems such as 2G, 3G, 4G, and 5G, wherein 5G includes two modes of NSA and independent networking (SA). Under the 5G application scene, data generated by the wireless communication device can be increased geometrically, and the mass data puts an unprecedented demand on the communication capability of the wireless communication device. Both the 5G NSA and SA deployment schemes involve key scheme support in increasing communication rates.

NSA refers to the deployment of 5G networks using existing 4G infrastructure, and the 5G carriers based on the NSA architecture only carry user data, and their control signaling is still transmitted through the 4G network. For wireless communication devices, NSA requires simultaneous operation of 4G Long Term Evolution (LTE) and 5G NR. The 4G and 5G dual connectivity (E-UTRA NR dual connectivity, endec) is an important 5G coverage scheme to ensure signal continuity in areas where 5G signals are unstable or uncovered. The simultaneous transmission of 4G and 5G produces coupled signals that can interfere with the reception of GPS signals, particularly second order and third order intermodulation signals.

Both LTE and NR have multiple operating bands, such as there is a LTE B1+ NR N3 combination. As shown in table 1, when the B1 channel is 18300 (with 1950MHz center transmission frequency), the N3 channel is 355000 (with 1775MHz center transmission frequency), and the GPS L1 frequency band has 1575.42MHz reception frequency, it is found that the third-order intermodulation signals of the LTE B1 channel and the NR N3 channel fall into 1600MHz to generate interference to the GPS signal.

TABLE 1

The interference filtering method provided by the related art is illustrated below with reference to fig. 1.

As shown in fig. 1, the GPS module may include: a radio frequency transceiver 101, a post-filter 102, a Low Noise Amplifier (LNA) 103, a pre-filter 104, and an antenna 106.

The rf transceiver 101 may have both transmitting and receiving functions to achieve reception of GPS channel signals.

The post-filter 102 is mainly used to filter out in-band interferers, such as interfering signals generated in the path of the pre-filter 104, the LNA 103, etc. The post-filter 102 mostly uses a Surface Acoustic Wave (SAW), and the SAW uses a method of converting electric energy into surface acoustic wave, and utilizes an acoustic resonance effect to realize filtering.

The LNA 103 is connected to the front filter 104 and the rear filter 102, respectively, to amplify the received GPS signal. In the case of amplifying a weak signal, the noise of the amplifier itself may cause serious interference to the signal, and the post-processing is performed based on the signal amplified by the LNA, so that the LNA with low noise is important in the GPS path.

The pre-filter 104 is connected to the LNA 103, and SAW is also frequently used, also called anti-aliasing filter. The pre-filter 104 is mainly used for separating useful signals from noise, filtering out frequency components which are not interested, improving the anti-interference performance and the signal-to-noise ratio of the signals, and improving the analysis accuracy.

An antenna 106 is connected to the front filter 104 for reception of GPS channel signals.

Experiments show that the intermodulation interference problem can be weakened by reducing the transmitting power of the LTE or NR signals, but the reduction of the transmitting power of the LTE or NR signals is limited in application due to the influence of the transmission distance and the transmission quality of the signals. In addition, research and analysis find that the location where the intermodulation signal of the LTE and NR signals interferes with GPS is at the LNA and front-to-back filters of the handset. In order to suppress this interference, the related art introduces an LC filter circuit (also referred to as an LC trap circuit) in the GPS path, which is interposed between the pre-filter (or SAW) and the antenna, and filters out the LTE or NR signal transmitted to the GPS path through the trap circuit.

The trap circuit can rapidly attenuate an input signal at a certain frequency point so as to achieve the effect of blocking the passing of the frequency signal. The notch circuit is one type of band-stop filter, except that its stop band is very narrow. A typical version is a series LC filter circuit, also known as an LC trap, which can provide a trap for a signal at or near the resonant frequency, thereby shorting it directly to ground, filtering out the frequency signal.

At present, in the global range, multiple frequency bands such as LB/MB/HB exist in LTE, multiple frequency bands such as LB/MB/HB/SUB 6G also exist in 5G, various schemes can appear in any combination of LTE and NR frequency bands under the NSA scene supported by the current mobile phone, and the conditions that second-order intermodulation signals and multi-order intermodulation signal products of LTE and NR signals fall into the GPS signal band are more. Combinations such as B1+ N28, B1+ N40, B2+ N66 can interfere with GPS mode signals. If interference occurs, namely an LC filter network is used, a great number of combinations need to be used, and in order to filter harmonic signals of various different frequencies and achieve a good filtering effect, the number of filter circuits may need to be increased. For example, a corresponding filter circuit may be provided for each of a plurality of LTE signals with different frequencies. As shown in fig. 1, 4 LC filter networks are provided to filter out interference of 4 frequency band signals. However, the signal frequency bands of the LTE and NR radio frequency circuits are combined very much, and in the actual use process, it is found that the filter circuit is complex in design and cannot meet the filtering requirements of many frequency bands.

It should be noted that the wireless communication device in the NSA scenario mentioned above is only an example, and the embodiments of the present application can be applied to any type of scenario where coupling signals of multiple radio frequency circuits interfere with GPS signals.

Therefore, it is an urgent need to solve the problem of how to eliminate the influence of the coupling signals generated by the rf circuits on the interference of the GPS signals when the rf circuits are all in a working state (or called a transmission state), and to develop a simpler filter network scheme.

In view of the foregoing problems, embodiments of the present application provide a wireless communication device, and the following describes embodiments of the present application in detail.

Fig. 2 is a schematic diagram of a wireless communication device according to an embodiment of the present disclosure. Referring to fig. 2, a wireless communication apparatus according to an embodiment of the present application includes: a first radio frequency circuit 210, a second radio frequency circuit 220, a GPS module 230, and a control circuit 240.

The first rf circuit 210 may be configured to transmit rf signals of a first communication system. The first communication system may refer to LTE, for example, and accordingly, the radio frequency signal of the first communication system may refer to an LTE signal. The first rf circuit 210 may have multiple operating frequency bands. Still taking LTE as an example, the multiple operating bands may include bands such as B1, B2, B3, B4, and B5 of LTE.

The first rf circuit 210 may transmit the rf signal on the first rf circuit 210 to the antenna 211. Alternatively, the first rf circuit 210 may transmit signals received by the antenna to other systems connected to the rf system, such as a baseband system.

The first radio frequency circuit 210 may include other devices in addition to the antenna 211. For example, the first rf circuit 210 may further include a power amplifier, a switch, a duplexer, a receiving circuit, and the like, which are not shown in fig. 2.

The second rf circuit 220 may be configured to transmit rf signals of the second communication system. The second communication system may be NR, for example, and accordingly, the radio frequency signal of the second communication system may be an NR signal. The second rf circuit 220 may have multiple operating frequency bands. Still taking NR as an example, the multiple operating bands may include N1, N2, N3, N4, N5, etc. bands of NR.

The multiple operating bands of the first rf circuit 210 and the multiple operating bands of the second rf circuit 220 are combined to form multiple types of coupled signals. As an example, the first frequency band may be B1 and the second frequency band may be N28, and this combination of frequency bands may be subject to interference. For another example, the first frequency band may be B2 and the second frequency band may be N66, and the combination of frequency bands may also have interference.

The second rf circuit 220 may transmit the rf signal on the second rf circuit 220 to the antenna 221. Alternatively, the second rf circuit 220 may transmit the signal received by the antenna to other systems connected to the rf system, such as a baseband system.

The second rf circuit 220 may have similar components to the first rf circuit 210, and the second rf circuit 220 may include other devices, such as a power amplifier, a switch, a duplexer, a receiving circuit, etc., besides the antenna 221, which are not shown in fig. 2.

The GPS module 230 has a receive path. The receiving path may include: a radio frequency transceiver 231, a post filter 232, an LNA233, a pre-filter 234, and an antenna 236.

The radio frequency transceiver 231 may have both transmitting and receiving functions to achieve reception of GPS channel signals.

The post filter 232 is primarily used to filter out in-band interferers such as those generated in the paths of the pre-filter 234, the LNA233, etc. SAW is often used for the post filter 102.

The LNA233 is connected to the front filter 234 and the rear filter 232, respectively, to amplify the received GPS signal.

The pre-filter 234 is connected to the LNA233, and mostly employs SAW, which is mainly used to separate useful signals from noise, improve the anti-interference performance and signal-to-noise ratio of the signals, and improve the analysis accuracy.

An antenna 236 is coupled to the pre-filter 234 for reception of GPS channel signals. The receive path may receive the GPS signals via the antenna 236. the antenna 236 may also receive signals transmitted by the first rf circuit 210 and signals transmitted by the second rf circuit 220.

Tunable filter circuit 235 may be coupled to the receive path of GPS module 230. Tunable filter circuit 235 may employ a tunable LC filter circuit. There are various implementations of the tunable LC filter circuit, such as dynamically adjusting the filter frequency by adjusting the inductance value in the LC filter combination. The filtering frequency is then dynamically adjusted, such as by adjusting the capacitance value in the LC filter combination.

The setting position of the adjustable filter circuit 235 in the embodiment of the present application is not specifically limited, as long as the effect of filtering the interference of the coupling signal mentioned above to the GPS module 230 can be achieved. Taking fig. 2 as an example, in some embodiments, tunable filter circuit 235 may be disposed between pre-filter (SAW)234 and antenna 236, and immediately adjacent to pre-filter (SAW)234, to filter out the source of interference before it occurs.

In one implementation, as shown in FIG. 2, tunable filter circuit 235 includes a fixed inductor 238 and a variable capacitor 237. Variable capacitor 237 adjusts the capacitance value over a wide range by changing the relative effective area or distance between the pole pieces, and thus correspondingly changing its capacitance. By adjusting the capacitance value, the tunable LC filter circuit can set a trap for the resonant frequency or for a plurality of interference signals, thereby directly filtering the interference signals.

The control circuit 240 is connected to the adjustable filter circuit 235, and can adjust the filter parameter of the adjustable filter circuit 235 according to the current working frequency band of the first rf circuit 210, so that the adjustable filter circuit filters the first communication signal, so as to avoid interference of the coupling signal of the first communication signal and the second communication signal to the GPS module.

The control circuit 240 may actively detect whether the first rf circuit and the second rf circuit are in the working state, or detect whether the first rf circuit and the second rf circuit are in the working state by other devices, and transmit the detection result to the control circuit 240.

Control circuit 240 may adjust corresponding filter parameters of adjustable filter circuit 235 according to a current operating frequency band of first rf circuit 210 in response to simultaneous operation of the first rf circuit and the second rf circuit.

The control circuit 240 may detect whether the resulting coupled signals of the first and second communication signals, particularly the second order intermodulation signal and/or the third order intermodulation signal, may interfere with the GPS module 230. If interference is generated on the GPS module 230, the corresponding filtering parameters of the adjustable filtering circuit 235 are adjusted according to the current operating frequency band of the signal of the first rf circuit 210.

The control circuit 240 may calculate the corresponding filtering parameter of the adjustable filtering circuit 235 in real time according to the current working frequency band of the signal of the first rf circuit 210, and then adjust the filtering parameter of the adjustable filtering circuit 235. The control circuit 240 may also retrieve the pre-stored operating frequency band of the signal of the first rf circuit 210 and the corresponding filtering parameter of the adjustable filtering circuit 235 according to the current operating frequency band of the signal of the first rf circuit 210, and then adjust the filtering parameter.

In some implementations, a mapping relationship between the operating frequency band of the first rf circuit 210 and the filtering parameter of the tunable filter circuit 235 may be established in advance. Then, according to the current operating frequency band of the first rf circuit 210 and the mapping relationship between the operating frequency band of the first rf circuit 210 and the filter parameter of the adjustable filter circuit 235, which is established in advance, the control circuit 240 determines the filter parameter corresponding to the current operating frequency band of the first rf circuit 210, and adjusts the filter parameter of the adjustable filter circuit 235 to the filter parameter corresponding to the current operating frequency band of the first rf circuit 210. The mapping relation can be calculated by combining theoretical calculation and actual measurement, and can also be set according to experience.

The control circuit 240 may be implemented in a variety of ways. In some embodiments, the control logic of the control circuit 240 may be implemented by a chip with a logic operation function, or may be implemented by a logic gate circuit. The control circuit 240 may control a capacitance of the variable capacitor 237 in the adjustable filter circuit 235 through a Mobile Industry Processor Interface (MIPI) to dynamically adjust a filtering frequency of the adjustable filter circuit 235.

MIPI is an open standard and specification established for mobile application processors, standardizing interfaces inside a mobile phone, such as a camera, a display interface, a radio frequency/baseband interface, and the like, thereby reducing the complexity of mobile phone design and increasing design flexibility. The MIPI unified interface standard has the advantages that mobile phone manufacturers can flexibly select different chips and modules from the market according to needs, and design and functions can be changed more quickly and conveniently.

It can be seen that, when the first rf circuit 210 and the second rf circuit 220 are both in a working state, the control circuit 240 adjusts the filtering parameter of the adjustable filtering circuit 235 according to the current working frequency band of the first rf circuit 210, so that the adjustable filtering circuit filters the first communication signal, so as to avoid interference of the coupling signal generated by the first communication signal and the second communication signal to the GPS module. The notch network of a GPS path is simplified, the cost and the design complexity are optimized, and the filtering requirement of multiple frequency bands is met.

In the above, the control circuit 240 adjusts the filtering parameters of the adjustable filtering circuit 235 according to the current operating frequency band of the first rf circuit 210. In other embodiments, the filter parameters of the adjustable filter circuit 235 may also be adjusted according to the current operating frequency band of the second rf circuit 220. The control circuit 240 may cause the adjustable filter circuit to filter the second communication signal in a similar control manner, so as to avoid interference of the coupling signal generated by the first communication signal and the second communication signal with the GPS signal.

Referring to fig. 2, a specific detection and control manner of a control circuit is given by taking a wireless communication device of a mobile phone as an example, and a GPS module in the mobile phone is an adjustable filter circuit based on a variable capacitor. The working process of this embodiment is explained in detail below:

the method comprises the following steps: predetermining the corresponding relation between the frequency band of the first communication signal and the capacitance value of the variable capacitor

According to the frequency band of the first communication signal, a fixed inductance can be selected, and the capacitance value of the variable capacitor is determined through theoretical calculation and actual test. For example, the inductance L may take the value of 1nH, and when the capacitance C of the variable capacitor is 6.8pF, the radio frequency signal in the LTE B1 frequency band may be filtered; when the capacitance value C of the variable capacitor is 8.2pF, the TX signal in the LTE B3 frequency band can be filtered; when the capacitance value C of the variable capacitor is 47pF, the TX signal of the LTE B28 band may be filtered. Thus, the correspondence relationship between the frequency band of the first communication signal and the capacitance value of the variable capacitance is determined, as shown in table 2.

TABLE 2

First communication signal operating frequency band	Variable capacitance parameter
		Frequency band 1	P1
Frequency band 2	P2
		Frequency band 3	P3
…	…
		Frequency band n	Pn

Step two: and C, recording the corresponding relation between the different frequency bands of the first communication signal and the capacitance value determined in the step I to a memory corresponding to the control circuit, such as a mobile phone memory, and a memory chip of the control circuit.

Step three: when the mobile phone operates in the NSA mode, the control circuit 240 actively detects whether the first rf circuit 210 and the second rf circuit 220 are in an operating state.

If the first rf circuit 210 and the second rf circuit 220 are both in working status, the control circuit 240 detects the working frequency band and channel of the LTE of the first rf circuit and the NR of the second rf circuit of the handset from the inside of the modem. If both the first rf circuit 210 and the second rf circuit 220 are not in the working state, the control circuit 240 may maintain the state.

Step four: and judging whether intermodulation signal products of LTE and NR working frequency bands calculated by theory fall into a GPS frequency band to generate interference.

Step five: if the intermodulation signal of the LTE and NR operating bands falls into the GPS band to generate interference, the control circuit 240 retrieves the capacitance value of the variable capacitor corresponding to the frequency band of the first communication signal from the memory according to the frequency band of the first communication signal. If the intermodulation signals do not fall within the GPS band to cause interference, the control circuit 240 may maintain the state.

Step six: the control circuit 240 controls the capacitance value of the variable capacitor 237 through the MIPI, adjusts the notch frequency of the adjustable LC filter circuit, and filters the first communication signal.

In some implementations, the capacitance of the variable capacitor 237 and the filtering parameter of the adjustable filtering circuit 235 may also be adjusted according to the current operating frequency band of the second rf circuit 220. The control circuit 240 may cause the adjustable filter circuit to filter the second communication signal in a similar control manner, so as to avoid interference of the coupling signal generated by the first communication signal and the second communication signal with the GPS signal.

The apparatus embodiments of the present application are described in detail above with reference to fig. 1 to 2, and the method embodiments of the present application are described in detail below with reference to fig. 3 and 4. It is to be understood that the description of the method embodiments corresponds to the description of the apparatus embodiments, and therefore reference may be made to the preceding apparatus embodiments for parts which are not described in detail.

Fig. 3 is a schematic flowchart of a control method of a wireless communication apparatus according to an embodiment of the present application. As shown in fig. 3, the method includes steps S310 to S330.

In step S310, the current operating frequencies of the first communication signal and the second communication signal are detected.

In step S320, the control circuit adjusts a filtering parameter corresponding to the adjustable filtering circuit according to the frequency of the first communication signal.

In step S330, the adjustable filter circuit is controlled to filter the first communication signal, so as to avoid interference of the coupling signal generated by the first communication signal and the second communication signal to the GPS signal.

Fig. 4 is a schematic flowchart of another control method for a wireless communication apparatus according to an embodiment of the present application. As shown in fig. 4, the method includes steps S410 to S460.

In step S410, it is detected whether both the first rf circuit and the second rf circuit are in the operating state? If yes, go to step S420; if not, the process proceeds to step S430.

In step S420, the current operating frequencies of the first communication signal and the second communication signal are detected, and then the process goes to step S440.

In step S440, determine whether the coupling signal generated by the first communication signal and the second communication signal will interfere with the GPS signal? If yes, go to step S450; if not, the process proceeds to step S430.

In step S430, the tunable filter circuit is controlled to remain unchanged.

In step S450, a corresponding filtering parameter of the adjustable filtering circuit is adjusted according to the frequency of the first communication signal, and a frequency band of the first communication signal and a corresponding capacitance value of the variable capacitor, which are stored in advance.

In step S460, the tunable filter circuit is controlled to filter the first communication signal, so as to avoid interference of the coupling signal generated by the first communication signal and the second communication signal with the GPS signal.

The embodiment of the application provides a wireless communication device and a control method thereof, wherein the filtering parameters of an adjustable filtering circuit are dynamically adjusted according to the current working frequency band of signals of a first radio frequency circuit, so that the adjustable filtering circuit filters the signals of the first radio frequency circuit, and interference of coupling signals generated by the signals of two radio frequency circuits on GPS signals is avoided. Compared with the filter circuit with fixed filter parameters adopted by the related technology, independent filters do not need to be configured for each type of coupled signals, and redundant filter circuits are eliminated, so that the structural complexity of the filter circuit can be reduced, the cost is optimized, and the requirement of multi-band filtering is met.

It should be understood that, in the various embodiments of the present application, "first", "second", and the like are used for distinguishing different objects, and are not used for describing a specific order, the order of execution of the above-mentioned processes is not meant to imply any order of execution, and the order of execution of the processes should be determined by their functions and inherent logic, and should not be construed as limiting the implementation processes of the embodiments of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A wireless communications apparatus, comprising:

the first radio frequency circuit is used for receiving and transmitting a first communication signal;

the second radio frequency circuit is used for receiving and transmitting a second communication signal;

the GPS module is provided with a receiving channel, and the receiving channel is connected with an adjustable filter circuit;

and the control circuit is used for adjusting the filtering parameter of the adjustable filtering circuit according to the current working frequency band of the first radio frequency circuit, so that the adjustable filtering circuit filters the first communication signal, and the interference of the coupling signal of the first communication signal and the second communication signal to the GPS module is avoided.

2. The wireless communication apparatus of claim 1, wherein the control circuit is further configured to:

detecting whether the first radio frequency circuit and the second radio frequency circuit work simultaneously;

the adjusting of the filter parameter of the adjustable filter circuit according to the current working frequency band of the first radio frequency circuit includes:

and adjusting the filtering parameters of the adjustable filtering circuit in response to the first radio frequency circuit and the second radio frequency circuit working simultaneously.

3. The wireless communication apparatus of claim 1, wherein the control circuit is further configured to:

detecting whether the coupling signal can generate interference on the GPS module;

and adjusting the filtering parameters of the adjustable filtering circuit in response to the coupling signal causing interference to the GPS module.

4. The wireless communication apparatus of claim 1, wherein the adjusting the filtering parameter of the adjustable filtering circuit according to the current operating frequency band of the first rf circuit comprises:

determining a filter parameter corresponding to the current working frequency band according to the current working frequency band of the first radio frequency circuit and a pre-established mapping relation between the working frequency band of the first radio frequency circuit and the filter parameter of the adjustable filter circuit;

and adjusting the filtering parameters of the adjustable filtering circuit to the filtering parameters corresponding to the current working frequency band.

5. The wireless communication device of claim 1, wherein the tunable filter circuit is an LC filter circuit with a variable capacitance value.

6. A method for controlling a wireless communication apparatus, the wireless communication apparatus comprising:

the first radio frequency circuit is used for transceiving a first communication signal;

the GPS module is provided with a receiving path, and the receiving path is connected with an adjustable filter circuit;

the control method comprises the following steps:

and adjusting the filtering parameter of the adjustable filtering circuit according to the current working frequency band of the first radio frequency circuit, so that the adjustable filtering circuit filters the first communication signal, and interference of a coupling signal of the first communication signal and the second communication signal to the GPS module is avoided.

7. The control method according to claim 6, wherein before the adjusting the filter parameter of the adjustable filter circuit according to the current operating frequency band of the first rf circuit, the control method further comprises:

8. The control method according to claim 6, wherein before the adjusting the filter parameter of the adjustable filter circuit according to the current operating frequency band of the first rf circuit, the control method further comprises:

and adjusting the filtering parameters of the adjustable filtering circuit in response to the coupling signal interfering with the GPS module.

9. The method according to claim 6, wherein the adjusting the filter parameter of the adjustable filter circuit according to the current operating frequency band of the first rf circuit comprises:

10. The control method of claim 6, wherein the tunable filter circuit is an LC filter circuit with a variable capacitance value.