CN113904701A - System and method for preventing antenna self-interference - Google Patents
System and method for preventing antenna self-interference Download PDFInfo
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- CN113904701A CN113904701A CN202110956579.9A CN202110956579A CN113904701A CN 113904701 A CN113904701 A CN 113904701A CN 202110956579 A CN202110956579 A CN 202110956579A CN 113904701 A CN113904701 A CN 113904701A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
Abstract
The application aims at providing a system and a method for preventing antenna self-interference, and generates a sending signal by acquiring an instruction sent by a mobile terminal; amplifying the transmission signal to obtain an amplified transmission signal; filtering the amplified transmission signal by using a filtering module to obtain a transmission signal with harmonic suppression; and transmitting the transmission signal after harmonic suppression based on the transmission signal after harmonic suppression and set switching logic. Therefore, the suppression processing of harmonic waves emitted by the amplified transmission signals of the power amplifier is effectively finished by using only one single low-pass filter, the conditions that the mobile phone signals are poor and the GPS navigation system is interfered due to the fact that harmonic wave energy is brought out by power supply wiring through the internal reflection of the shielding case are avoided, the circuit design is simplified, the cost is saved, and meanwhile the integrity of the signals is guaranteed.
Description
Technical Field
The present application relates to the field of mobile communications, and in particular, to a system and method for preventing antenna self-interference.
Background
The third harmonic generated by the B12 transmission signal (TX signal) of the mobile terminal falls into the reception band of B66 or B4 to cause interference, thereby affecting the quality of the received signal of the handset; the second harmonic of the B13TX signal also interferes with the GPS signal reception band. Therefore, when the communication base station distributes the mobile terminal to work at 12A-66A or 12A-4A, the mobile phone signal is poor; when the mobile terminal is networked and works in the B13 frequency band, the GPS navigation system of the mobile terminal is interfered, and the positioning is not possible. Both of these interferences are a self-interference problem for the handset radio frequency system.
In the prior art, low-pass filters are added to the signaling paths of B12 and B13 to suppress harmonic signals of B12 and B13, respectively, and protect the B66 and GPS receiver from interference. The TX signal of B12 or B13 comes from the radio frequency Trancevier, and then goes through amplifier (PA) to amplify the signal, then goes through B12 and B13 duplexers, each path is added with low pass filter, finally goes through common radio frequency front end device (Transmit Module) to reach the antenna and radiate. The high-order harmonics are mainly generated due to nonlinear distortion of the PA, so that the low-pass filter is added to the output path of the PA to play a role in suppression.
However, the above design also has many problems, first, in principle, the low-pass filter is added between the duplexer and the Transmit Module, the PA in the PCB is placed on the top surface, other rf front-end devices are placed on the bottom surface, and the PA output port is far away from the low-pass filter. At this time, the harmonic energy output by the PA is still high and is not attenuated, and it is very likely to be brought out by the power supply wiring through the internal reflection of the shielding case, so that the effect of the low-pass filter on suppressing the harmonic is not obvious.
Secondly, the circuit design and wiring of the limited PCB subspace are too complex, and the circuit can generate uncontrollable distributed capacitance, parasitic capacitance or stray capacitance and the like during working, thereby affecting the signal integrity. Finally, from the design cost perspective, the simpler the circuit design should be, the better the performance can be achieved.
Disclosure of Invention
An object of the present application is to provide a system and a method for preventing antenna self-interference, which solve the problems in the prior art that the effect of using a low-pass filter to suppress PA harmonic interference is poor, the design of PCB boards is too complex, the integrity of signals is affected, and the cost is too high.
According to an aspect of the present application, there is provided a system for preventing antenna self-interference, the system comprising: an amplifying module, a filtering module, a switch module, a plurality of different radio frequency modules and a transmitting module, wherein the amplifying module is electrically connected with the filtering module, the filtering module is electrically connected with the different radio frequency modules through the switch module, the different radio frequency modules are electrically connected with the transmitting module, wherein,
the amplifying module is used for amplifying the received sending signal to obtain an amplified sending signal;
the filtering module is used for acquiring the amplified transmission signal and performing harmonic suppression processing on the amplified transmission signal to obtain a transmission signal after harmonic suppression;
the switch module is used for selecting a target radio frequency module from the plurality of different radio frequency modules based on the transmission signal subjected to harmonic suppression and transmitting the transmission signal subjected to harmonic suppression to the target radio frequency module;
the target radio frequency module is used for transmitting the sending signal after the harmonic suppression to the transmitting module;
and the transmitting module is used for transmitting the transmitting signal after the harmonic suppression and receiving the base station information.
Optionally, the system includes a data processing module, and the data processing module is configured to generate a sending signal based on an instruction sent by the mobile terminal, and transmit the sending signal to the amplifying module.
Optionally, the filtering module includes a low-pass filter for performing harmonic suppression processing on the amplified transmission signal.
Optionally, the switch module comprises a SP2T switch unit, and the amplifying module and the data processing module, the filtering module, the SP2T switch unit, the plurality of different radio frequency modules, and the transmitting module are disposed on different sides of a printed circuit board.
Optionally, the plurality of different radio frequency modules include a first radio frequency unit and a second radio frequency unit, and the switch module is configured to select a target radio frequency module from the plurality of different radio frequency modules according to a parameter of a transmission signal after harmonic suppression, and transmit the transmission signal after harmonic suppression to the target radio frequency module.
Optionally, the first radio frequency unit includes a B12 duplexer and the second radio frequency unit includes a B13 duplexer.
Optionally, the system further includes an impedance matching circuit disposed between the filtering module and the switch module, and configured to match an impedance between the filtering module and the switch module, where the impedance matching module is obtained by series-parallel connection of resistive-capacitive inductors.
According to another aspect of the present application, there is also provided a method of preventing antenna self-interference, the method including:
acquiring an instruction sent by a mobile terminal to generate a sending signal;
amplifying the transmission signal to obtain an amplified transmission signal;
filtering the amplified transmission signal by using a filtering module to obtain a transmission signal with harmonic suppression;
and transmitting the transmission signal after harmonic suppression based on the transmission signal after harmonic suppression and set switching logic.
Optionally, the method comprises:
setting a plurality of different radio frequency modules;
the transmitting the transmission signal after harmonic suppression based on the transmission signal after harmonic suppression and the set switching logic comprises the following steps:
selecting a target radio frequency module from the plurality of different video modules based on the harmonic-suppressed transmission signal, and transmitting the harmonic-suppressed transmission signal to the target radio frequency module by using a set switch logic;
and sending the transmission signal subjected to the harmonic suppression to a transmitting module by using the target radio frequency module, and completing transmission processing of the transmission signal subjected to the harmonic suppression.
According to yet another aspect of the application, there is also provided a computer readable medium having computer readable instructions stored thereon, the computer readable instructions being executable by a processor to implement the method of any of the preceding claims.
Compared with the prior art, the method and the device have the advantages that the sending signal is generated by acquiring the instruction sent by the mobile terminal; amplifying the transmission signal to obtain an amplified transmission signal; filtering the amplified transmission signal by using a filtering module to obtain a transmission signal with harmonic suppression; and transmitting the transmission signal after harmonic suppression based on the transmission signal after harmonic suppression and set switching logic. Therefore, the suppression processing of harmonic waves emitted by the amplified transmission signals of the power amplifier is effectively finished by using only one single low-pass filter, the conditions that the mobile phone signals are poor and the GPS navigation system is interfered due to the fact that harmonic wave energy is brought out by power supply wiring through the internal reflection of the shielding case are avoided, the circuit design is simplified, the cost is saved, and meanwhile the integrity of the signals is guaranteed.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 illustrates a schematic diagram of a system framework for preventing antenna self-interference according to an aspect of the present application;
fig. 2 is a schematic diagram of a system framework for preventing antenna self-interference in an alternative embodiment of the present application;
fig. 3 is a flow chart illustrating a method for preventing antenna self-interference according to another aspect of the present application.
The same or similar reference numbers in the drawings identify the same or similar elements.
Detailed Description
The present application is described in further detail below with reference to the attached figures.
In a typical configuration of the present application, the terminal, the device serving the network, and the trusted party each include one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include non-transitory computer readable media (transient media), such as modulated data signals and carrier waves.
Fig. 1 is a schematic diagram illustrating a frame structure of a system for preventing antenna self-interference according to an aspect of the present application, the system including: the radio frequency transmitter comprises an amplifying module 100, a filtering module 200, a switch module 300, a plurality of different radio frequency modules 400 and a transmitting module 500, wherein the amplifying module 100 is electrically connected with the filtering module 200, the filtering module 200 is electrically connected with the different radio frequency modules 400 through the switch module 300, the different radio frequency modules 400 are electrically connected with the transmitting module 500, and the amplifying module 100 is used for amplifying a received transmitting signal to obtain an amplified transmitting signal; the filtering module 200 is configured to obtain the amplified transmission signal, and perform harmonic suppression processing on the amplified transmission signal to obtain a transmission signal after harmonic suppression; the switch module 300 is configured to select a target rf module from the plurality of different rf modules 400 based on the harmonic-suppressed transmit signal, and transmit the harmonic-suppressed transmit signal to the target rf module; the target rf module is configured to transmit the transmit signal after the harmonic suppression to the transmitting module 500; the transmitting module 500 is configured to transmit the transmission signal after the harmonic suppression, and receive base station information. Therefore, the suppression processing of harmonic waves emitted by the amplified transmission signals of the power amplifier is effectively finished by using only one single low-pass filter, the conditions that the mobile phone signals are poor and the GPS navigation system is interfered due to the fact that harmonic wave energy is brought out by power supply wiring through the internal reflection of the shielding case are avoided, the circuit design is simplified, the cost is saved, and meanwhile the integrity of the signals is guaranteed.
Specifically, the amplification module 100 may control an internal amplification circuit and a switching logic thereof through a software modem, and complete amplification processing on a received transmission signal to obtain an amplified transmission signal, where the amplification module 100 may be a power amplifier, and the transmission signal may be obtained from a Transceiver (Transceiver); the filtering module 200 is located between the amplifying module 100 and the switch module 300, obtains the amplified transmission signal, and completes harmonic suppression processing on the amplified transmission signal through a single filter to obtain a transmission signal after harmonic suppression. Next, the switching module 300 selects a target rf module from the plurality of different rf modules 400 based on the transmission signal after harmonic suppression, where the transmission signal after harmonic suppression includes instruction content to be transmitted and transmission related parameters, and determines the target rf module based on the transmission related parameters, and the related parameters may be determined based on the base station information acquired by the transmitting module 500, for example, determining the current rf threshold based on the base station information. Then, the transmission signal after the harmonic suppression is sent to the target radio frequency module, the target radio frequency module transmits the transmission signal after the harmonic suppression to the transmitting module 500, and the transmitting module 500 transmits the transmission signal after the harmonic suppression to a base station and receives various information fed back by the base station in real time. Therefore, the suppression processing of harmonic waves emitted by the amplified transmission signals of the power amplifier is effectively finished by using only one single low-pass filter, the conditions that the mobile phone signals are poor and the GPS navigation system is interfered due to the fact that harmonic wave energy is brought out by power supply wiring through the internal reflection of the shielding case are avoided, the circuit design is simplified, the cost is saved, and meanwhile the integrity of the signals is guaranteed.
In an optional embodiment of the present application, the system includes a data processing module 600, and the data processing module 600 is configured to generate a sending signal based on an instruction sent by the mobile terminal, and transmit the sending signal to the amplifying module 100. Here, the mobile terminal selects a frequency band through the base station information acquired by the transmitting module 500, and sends the selected frequency band information as a data parameter adding instruction to the data processing module 600, and the sending signal generated by the data processing module 600 includes the frequency band information selected by the mobile terminal, and is transmitted to the amplifying module 100 for subsequent processing, where the data processing module 600 may be a signal transceiver (traniver).
In an alternative embodiment of the present application, the filtering module 200 includes a low-pass filter 201 for performing harmonic suppression processing on the amplified transmission signal. Here, the filtering module 200 only needs a single low-pass filter to perform harmonic suppression processing on the amplified transmission signal. In an alternative embodiment of the present application, the harmonic suppression processing of the amplified transmission signal is performed by applying a single low-pass filter as follows: firstly, looking at the harmonic suppression effect of B12, testing the sensitivity of B66 under the condition of B12 wave band emission when 12A-66ACA works in a combined mode according to the 3GPPTS36.521-1V14.4.0 specification, when B12 emits at the maximum power, the harmonic interference suffered by B66 should be the maximum, at the moment, the sensitivity is the lowest, and comparing the sensitivity difference of B66 measured when B12 emits at the minimum power, the harmonic suppression effect of the circuit is judged. It can be seen in the test data of table 1 that B66 sensitivity can be seen to suffer from interference of no more than 0.7dB at maximum, meeting specifications.
TABLE 1B 66 sensitivity test data
When the harmonic suppression effect of the B12 is verified, the switch module selects the SP2T switch, the second harmonic is tested to be-53 dBm from the port B13RF of the SP2T switch, and the budget (Paout-12dBm) + (LPF attention-35 dB) is met; the B13 second harmonic of the PA output is-40 dBc, the PA output power is 28dBm, the generated harmonic intensity is-12 dBm, the harmonic intensity is-35 dB after the attenuation of an LPF, the harmonic intensity is-47 dBm theoretically, and the actual intensity after the test of SP2T is-53 dBm. So that the requirements are met to achieve the expected effect. The method and the device realize the amplification function of the B12 or B13 signal by only using one output port of a Power Amplifier (PA), save PA resources, and thus the system can be compatible and support more frequency bands; the harmonic waves of B12 and B13 are simultaneously suppressed by using a simpler circuit design, the problem of system self-interference is solved, the quality of a B4 or B66 received signal, the quality of a GPS signal and navigation positioning capability are improved, and the user experience is improved; meanwhile, only one Low Pass Filter (LPF) is used in the circuit, and the design cost of the system is saved. Because the circuit is simplified, a larger space is obtained in the layout of a Printed Circuit Board (PCB), so that the wiring environment of the ornament is cleaner, and the signal quality is better.
In an alternative embodiment of the present application, the switch module 300 comprises a SP2T switch unit 301, and the amplifying module 100 is disposed on a different side of a printed circuit board from the data processing module 600, the filtering module 200, the SP2T switch unit 301, the plurality of different rf modules 400, and the transmitting module 500. Here, since the amplification module 100 generates harmonic energy, the amplification module 100 is disposed on the top surface of the printed circuit board, and the data processing module 600, the filtering module 200, the SP2T switching unit 301, the plurality of different rf modules 400, and the transmission module 500 are disposed on the bottom surface of the printed circuit board, so as to efficiently avoid interference of the harmonic energy.
In an alternative embodiment of the present application, the plurality of different rf modules 400 includes a first rf unit 401 and a second rf unit 402, and the switch module 300 is configured to select a target rf module from the plurality of different rf modules 400 according to a parameter of a harmonic-suppressed transmit signal, and transmit the harmonic-suppressed transmit signal to the target rf module. Here, the parameters of the transmission signal after harmonic suppression include frequency band information selected by the mobile terminal, and a target rf module is selected from the first rf unit 401 and the second rf unit 402 based on the frequency band information selected by the mobile terminal, so as to accurately determine the target rf module.
In an alternative embodiment of the present application, the first radio unit 401 includes a B12 duplexer, and the second radio unit 402 includes a B13 duplexer. Here, the B12 duplexer transmits a transmission signal of a 699MHz-716MHz band, and the B13 duplexer transmits a transmission signal of a 777MHz-787MHz band.
In an optional embodiment of the present application, the system further includes an impedance matching circuit 700 disposed between the filtering module 200 and the switching module 300, and configured to match an impedance between the filtering module 200 and the switching module 300, where the impedance matching circuit 700 is obtained by connecting the resistive-capacitive inductors in series and in parallel. Here, there is a problem of impedance mismatch when rf devices are connected. The filtering module 200 is a low-pass filter, the switching module 300 is an SP2T switch, and an impedance matching circuit is required between the low-pass filter and the SP2T switch to adjust impedance, wherein the impedance matching circuit is a matching network formed by series-parallel connection of resistance-capacitance inductors, such as a Π shape, an L shape, a T shape, and the like.
Fig. 2 is a schematic diagram of a system framework for preventing antenna self-interference in an alternative embodiment of the present application, where the data processing module may be a transceiver (transceiver), the amplifying module may be a Power Amplifier (PA), the filtering module may be a Low Pass Filter (LPF), the LPF may be a U3711 LPF, the switching module may be an SP2T switch, and the LPF is located between the PA and the SP2T switch to implement hardware sharing of B12 and B13, instead of using one LPF for each of separate paths of B12 and B13. The TX signal of B12 or B13 is amplified by PA after coming out from Transceiver, enters LPF to play a role of suppressing harmonic after coming out from the same output port LB1, is switched to a duplexer path of B12 or B13 through an SP2T switch, and finally reaches the antenna through TXM to be radiated. The ANT port of the B12 or B13 duplexer is connected to a TXM, and the TXM radiates a signal through an antenna, establishes a connection with a base station, acquires a signal of the base station to determine whether the current frequency band is a B12 or B13 frequency band, returns the base station signal to the duplexer, and then returns the base station signal to a transceiver in a unified manner so that the mobile terminal can determine the current frequency band and generate a transmission signal of B12 or B13. Then, the transmission signal of B12 or B13 is amplified by PA under the control of the software modem, and then output from the same port, here LB3, to the U3711 LPF. The U3711 LPF is connected to the SP2T switch via a matching network. The SP2T switch is switched to the B12 duplexer path or the B13 duplexer path by a GPIO port control signal, and the ANT port of the B12 or B13 duplexer is connected to the TXM antenna radiation signal to the base station. The method and the device realize the amplification function of the B12 or B13 signal by only using one output port of a Power Amplifier (PA), save PA resources, and thus the system can be compatible and support more frequency bands; the harmonic waves of B12 and B13 are simultaneously suppressed by using a simpler circuit design, the problem of system self-interference is solved, the quality of a B4 or B66 received signal, the quality of a GPS signal and navigation positioning capability are improved, and the user experience is improved; meanwhile, only one Low Pass Filter (LPF) is used in the circuit, and the design cost of the system is saved. Because the circuit is simplified, a larger space is obtained in the layout of a Printed Circuit Board (PCB), so that the wiring environment of the ornament is cleaner, and the signal quality is better.
Fig. 3 is a flow chart illustrating a method for preventing antenna self-interference according to another aspect of the present application, the method including: S100-S400, wherein in S100, an instruction sent by the mobile terminal is acquired to generate a sending signal; in S200, amplifying the transmission signal to obtain an amplified transmission signal; in S300, a filtering module is used to perform filtering processing on the amplified transmission signal to obtain a transmission signal with suppressed harmonics; in S400, the harmonic suppressed transmit signal is transmitted based on the harmonic suppressed transmit signal and the set switching logic. Therefore, the suppression processing of harmonic waves emitted by the amplified transmission signals of the power amplifier is effectively finished by using only one single low-pass filter, the conditions that the mobile phone signals are poor and the GPS navigation system is interfered due to the fact that harmonic wave energy is brought out by power supply wiring through the internal reflection of the shielding case are avoided, the circuit design is simplified, the cost is saved, and meanwhile the integrity of the signals is guaranteed.
Specifically, in S100, an instruction generated transmission signal transmitted by the mobile terminal is acquired. The mobile terminal selects a frequency band according to the acquired base station information, and generates a transmission signal by using the selected frequency band information as a data parameter adding instruction, wherein the transmission signal comprises the frequency band information selected by the mobile terminal.
In S200, the transmission signal is amplified to obtain an amplified transmission signal. Here, the transmission signal may be amplified by using a Power Amplifier (PA) to obtain an amplified transmission signal. In an alternative embodiment of the present application, a certain power amplifier is used, the amplification gain is 30.5dB, the maximum power emitted by the signal transceiver is about-1 dBm, and after PA amplification, that is, 29dBm, the link loss is about 5dB, so the output conducted power is generally 24 dBm.
In S300, a filtering module is used to perform filtering processing on the amplified transmission signal, so as to obtain a transmission signal with suppressed harmonics. Here, the filtering module 200 only needs a single low-pass filter to perform harmonic suppression processing on the amplified transmission signal, and only uses one output port of a Power Amplifier (PA) to achieve the amplification function on the B12 or B13 signal, thereby saving PA resources, so that the system can be compatible with and support more frequency bands; the harmonic waves of B12 and B13 are simultaneously suppressed by using a simpler circuit design, the problem of system self-interference is solved, the quality of a B4 or B66 received signal, the quality of a GPS signal and navigation positioning capability are improved, and the user experience is improved; meanwhile, only one Low Pass Filter (LPF) is used in the circuit, and the design cost of the system is saved. Because the circuit is simplified, a larger space is obtained in the layout of a Printed Circuit Board (PCB), so that the wiring environment of the ornament is cleaner, and the signal quality is better.
In S400, the harmonic suppressed transmit signal is transmitted based on the harmonic suppressed transmit signal and the set switching logic. Here, the switch logic may be configured to select the target frequency band based on the relevant parameters of the transmission signal to complete the transmission process of the transmission signal, for example, the SP2T switch is configured to complete the selection process of the target frequency band based on the GPIO switch logic.
In an optional embodiment of the present application, in S400, a plurality of different radio frequency modules are set, a target radio frequency module is selected from the plurality of different video modules based on the transmission signal after harmonic suppression, and the transmission signal after harmonic suppression is transmitted to the target radio frequency module using a set switching logic; and sending the transmission signal subjected to the harmonic suppression to a transmitting module by using the target radio frequency module, and completing transmission processing of the transmission signal subjected to the harmonic suppression. Here, the plurality of different rf modules include a first rf unit and a second rf unit, the parameter of the transmission signal after harmonic suppression includes frequency band information selected by the mobile terminal, and a target rf module is selected from the first rf unit and the second rf unit based on the frequency band information selected by the mobile terminal to accurately determine the target rf module, wherein the first rf unit includes a B12 duplexer, and the second rf unit includes a B13 duplexer.
Embodiments of the present application also provide a computer-readable medium, on which computer-readable instructions are stored, where the computer-readable instructions are executable by a processor to implement the foregoing method for preventing antenna self-interference.
For example, the computer readable instructions, when executed, cause the one or more processors to:
acquiring an instruction sent by a mobile terminal to generate a sending signal; amplifying the transmission signal to obtain an amplified transmission signal; filtering the amplified transmission signal by using a filtering module to obtain a transmission signal with harmonic suppression; transmitting the harmonic-suppressed transmission signal based on the harmonic-suppressed transmission signal and the set switching logic
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
It should be noted that the present application may be implemented in software and/or a combination of software and hardware, for example, implemented using Application Specific Integrated Circuits (ASICs), general purpose computers or any other similar hardware devices. In one embodiment, the software programs of the present application may be executed by a processor to implement the steps or functions described above. Likewise, the software programs (including associated data structures) of the present application may be stored in a computer readable recording medium, such as RAM memory, magnetic or optical drive or diskette and the like. Additionally, some of the steps or functions of the present application may be implemented in hardware, for example, as circuitry that cooperates with the processor to perform various steps or functions.
In addition, some of the present application may be implemented as a computer program product, such as computer program instructions, which when executed by a computer, may invoke or provide methods and/or techniques in accordance with the present application through the operation of the computer. Program instructions which invoke the methods of the present application may be stored on a fixed or removable recording medium and/or transmitted via a data stream on a broadcast or other signal-bearing medium and/or stored within a working memory of a computer device operating in accordance with the program instructions. An embodiment according to the present application comprises an apparatus comprising a memory for storing computer program instructions and a processor for executing the program instructions, wherein the computer program instructions, when executed by the processor, trigger the apparatus to perform a method and/or a solution according to the aforementioned embodiments of the present application.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. The terms first, second, etc. are used to denote names, but not any particular order.
Claims (10)
1. A system for preventing antenna self-interference, the system comprising: an amplifying module, a filtering module, a switch module, a plurality of different radio frequency modules and a transmitting module, wherein the amplifying module is electrically connected with the filtering module, the filtering module is electrically connected with the different radio frequency modules through the switch module, the different radio frequency modules are electrically connected with the transmitting module, wherein,
the amplifying module is used for amplifying the received sending signal to obtain an amplified sending signal;
the filtering module is used for acquiring the amplified transmission signal and performing harmonic suppression processing on the amplified transmission signal to obtain a transmission signal after harmonic suppression;
the switch module is used for selecting a target radio frequency module from the plurality of different radio frequency modules based on the transmission signal subjected to harmonic suppression and transmitting the transmission signal subjected to harmonic suppression to the target radio frequency module;
the target radio frequency module is used for transmitting the sending signal after the harmonic suppression to the transmitting module;
and the transmitting module is used for transmitting the transmitting signal after the harmonic suppression and receiving the base station information.
2. The system according to claim 1, wherein the system comprises a data processing module, and the data processing module is configured to generate a transmission signal based on an instruction sent by a mobile terminal, and transmit the transmission signal to the amplifying module.
3. The system of claim 1, wherein the filtering module comprises a low pass filter for harmonic rejection of the amplified transmit signal.
4. The system of claim 2, wherein the switch module comprises an SP2T switch unit, and wherein the amplification module is disposed on a different side of a printed circuit board than the data processing module, the filtering module, the SP2T switch unit, the plurality of different radio frequency modules, and the transmit module.
5. The system according to any one of claims 1 to 4, wherein the plurality of different RF modules includes a first RF unit and a second RF unit, and the switch module is configured to select a target RF module from the plurality of different RF modules according to a parameter of the harmonic suppressed transmit signal, and transmit the harmonic suppressed transmit signal to the target RF module.
6. The system of claim 5, wherein the first radio frequency unit comprises a B12 duplexer and the second radio frequency unit comprises a B13 duplexer.
7. The system of claim 1, further comprising an impedance matching circuit disposed between the filtering module and the switching module for matching an impedance between the filtering module and the switching module, wherein the impedance matching module is formed by series-parallel connection of resistive-capacitive inductors.
8. A method of preventing antenna self-interference, wherein the method comprises:
acquiring an instruction sent by a mobile terminal to generate a sending signal;
amplifying the transmission signal to obtain an amplified transmission signal;
filtering the amplified transmission signal by using a filtering module to obtain a transmission signal with harmonic suppression;
and transmitting the transmission signal after harmonic suppression based on the transmission signal after harmonic suppression and set switching logic.
9. The method of claim 8, wherein the method comprises:
setting a plurality of different radio frequency modules;
the transmitting the transmission signal after harmonic suppression based on the transmission signal after harmonic suppression and the set switching logic comprises the following steps:
selecting a target radio frequency module from the plurality of different video modules based on the harmonic-suppressed transmission signal, and transmitting the harmonic-suppressed transmission signal to the target radio frequency module by using a set switch logic;
and sending the transmission signal subjected to the harmonic suppression to a transmitting module by using the target radio frequency module, and completing transmission processing of the transmission signal subjected to the harmonic suppression.
10. A computer readable medium having computer readable instructions stored thereon which are executable by a processor to implement the method of claim 8 or 9.
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| CN202110956579.9A CN113904701B (en) | 2021-08-19 | 2021-08-19 | System and method for preventing antenna self-interference |
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| CN202110956579.9A CN113904701B (en) | 2021-08-19 | 2021-08-19 | System and method for preventing antenna self-interference |
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| CN113904701B (en) | 2023-03-07 |
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