CN111431545B - Electronic equipment and communication interference control method - Google Patents

Electronic equipment and communication interference control method Download PDF

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Publication number
CN111431545B
CN111431545B CN202010239233.2A CN202010239233A CN111431545B CN 111431545 B CN111431545 B CN 111431545B CN 202010239233 A CN202010239233 A CN 202010239233A CN 111431545 B CN111431545 B CN 111431545B
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communication module
module
radio frequency
antenna
frequency communication
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CN111431545A (en
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郭富祥
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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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
    • 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
    • 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
    • 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
    • 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
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • 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
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2621—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using frequency division multiple access [FDMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The embodiment of the application discloses electronic equipment and a communication interference control method, wherein a first radio frequency communication module of the electronic equipment is connected between a processor and a first antenna; the second radio frequency communication module is connected between the processor and the second antenna; the first front-end module is connected between the second radio frequency communication module and the second antenna; one end of a first band-pass filter of the first front-end module is connected with the second radio frequency communication module, the other end of the first band-pass filter is connected with a first input end of a combiner of the first front-end module, an output end of the combiner is connected with one end of a first switch module, and the other end of the first switch module is connected with the second antenna; the processor is used for reducing intermodulation interference of the first radio frequency communication module to the second radio frequency communication module through the first band-pass filter and the combiner when the first radio frequency communication module and the second radio frequency communication module simultaneously transmit signals and the transmitting frequency of the signals transmitted by the first radio frequency communication module falls within the receiving frequency band of the second radio frequency communication module.

Description

Electronic equipment and communication interference control method
Technical Field
The present application relates to, but not limited to, the field of communications technologies, and in particular, to an electronic device and a communication interference control method.
Background
When two radio Frequency communication modules of Frequency Division Duplex (FDD), such as a first radio Frequency communication module and a second radio Frequency communication module, transmit signals simultaneously, when the transmission Frequency of the signal transmitted by the first radio Frequency communication module falls within the receiving Frequency band of the second radio Frequency communication module, an intermodulation signal is generated and falls exactly on the receiving channel of the second radio Frequency communication module, which causes interference to the second radio Frequency communication module.
Content of application
Embodiments of the present application are intended to provide an electronic device and a communication interference control method, so as to reduce or even eliminate interference caused by intermodulation signals generated when a first radio frequency communication module and a second radio frequency communication module transmit signals simultaneously in the related art, thereby improving communication performance of the electronic device.
The technical scheme of the application is realized as follows:
an electronic device, the electronic device comprising: a processor, a first radio frequency communication module, a second radio frequency communication module, a first front end module, a first antenna and a second antenna,
the first radio frequency communication module is connected between the processor and the first antenna;
the second radio frequency communication module is connected between the processor and the second antenna;
the first front-end module is connected between the second radio frequency communication module and the second antenna;
the first front-end module comprises at least one first branch, a multi-mode multi-frequency power amplifier and a first switch module, wherein the first branch comprises a first band-pass filter and a combiner, one end of the first band-pass filter is connected with the second radio-frequency communication module, the other end of the first band-pass filter is connected with a first input end of the combiner, one end of the multi-mode multi-frequency power amplifier is connected with the second radio-frequency communication module, the other end of the multi-mode multi-frequency power amplifier is connected with a second input end of the combiner, an output end of the combiner is connected with one end of the first switch module, and the other end of the first switch module is connected with the second antenna;
the processor is configured to reduce, by the first bandpass filter and the combiner, intermodulation interference of the first radio frequency communication module with the second radio frequency communication module when the first radio frequency communication module and the second radio frequency communication module simultaneously transmit signals and a transmission frequency of the signal transmitted by the first radio frequency communication module falls within a reception frequency band of the second radio frequency communication module.
Optionally, the first radio frequency communication module is an ad hoc network communication module, and the second radio frequency communication module is a cellular communication module.
Optionally, the electronic device further includes a second switch module, a third antenna, and a second front end module;
the second switch module is connected between the first switch module and the second antenna;
the second opening Guan Mozu is connected between the second front end module and the third antenna;
the second front-end module is connected between the second radio frequency communication module and the second switch module;
the second front-end module comprises at least one second branch, and the second branch comprises a second band-pass filter and a third switch module which are connected in series.
Optionally, the first radio frequency communication module includes a first register, and the first register is configured to store a first transmission power of the first radio frequency communication module;
the processor is further configured to adjust the first transmit power in the first register to obtain a first target transmit power; the first target transmission power is smaller than the first transmission power, and the difference value between the first target transmission power and the first transmission power is within a first preset difference value range;
the processor is further configured to control the first radio frequency communication module to transmit a signal at the first target transmission power.
Optionally, the second radio frequency communication module includes a second register, and the second register is configured to store a second transmission power of the second radio frequency communication module;
the processor is further configured to adjust a second transmit power in the second register to obtain a second target transmit power; the second target transmitting power is smaller than the second transmitting power, and the difference value between the second target transmitting power and the second transmitting power is within a second preset difference value range;
the processor is further configured to control the second radio frequency communication module to transmit a signal at the second target transmission power.
Optionally, the linearity of the first switch module, the second switch module, and the third switch module meets a preset linearity threshold.
Optionally, the first switch module includes a high-frequency power amplifier, a low-frequency power amplifier, a first low-pass filter, a second low-pass filter, and an antenna switch module;
the high-frequency power amplifier, the first low-pass filter and the antenna switch module are arranged between the second radio-frequency communication module and the second switch module in series;
the low-frequency power amplifier, the second low-pass filter and the antenna switch module are arranged between the second radio-frequency communication module and the second switch module in series.
A communication interference control method is applied to the electronic equipment, and the method comprises the following steps:
determining that the transmitting frequency of the signal transmitted by the first radio frequency communication module falls within the receiving frequency band of the second radio frequency communication module when the first radio frequency communication module and the second radio frequency communication module transmit the signal simultaneously;
reducing intermodulation interference of the first radio frequency communication module to the second radio frequency communication module through the first band-pass filter and the combiner.
Optionally, the method further includes:
adjusting a first transmitting power in a first register of the first radio frequency communication module to obtain a first target transmitting power; the first target transmission power is smaller than the first transmission power, and the difference value between the first target transmission power and the first transmission power is within a first preset difference value range;
controlling the first radio frequency communication module to transmit signals at the first target transmission power.
Optionally, the method further includes:
adjusting a second transmitting power in a second register of the second radio frequency communication module to obtain a second target transmitting power; the second target transmitting power is smaller than the second transmitting power, and the difference value between the second target transmitting power and the second transmitting power is within a second preset difference value range;
controlling the second radio frequency communication module to transmit signals at the second target transmission power.
The electronic equipment and the communication interference control method provided by the embodiment of the application comprise a processor, a first radio frequency communication module, a second radio frequency communication module, a first front end module, a first antenna and a second antenna, wherein the first radio frequency communication module is connected between the processor and the first antenna; the second radio frequency communication module is connected between the processor and the second antenna; the first front-end module is connected between the second radio frequency communication module and the second antenna; the first front-end module comprises at least one first branch, a multi-mode multi-frequency power amplifier and a first switch module, the first branch comprises a first band-pass filter and a combiner, one end of the first band-pass filter is connected with the second radio frequency communication module, the other end of the first band-pass filter is connected with the first input end of the combiner, one end of the multi-mode multi-frequency power amplifier is connected with the second radio frequency communication module, the other end of the multi-mode multi-frequency power amplifier is connected with the second input end of the combiner, the output end of the combiner is connected with one end of the first switch module, and the other end of the first switch module is connected with the second antenna; the processor is used for reducing intermodulation interference of the first radio frequency communication module to the second radio frequency communication module through the first band-pass filter and the combiner when the first radio frequency communication module and the second radio frequency communication module simultaneously transmit signals and the transmitting frequency of the signals transmitted by the first radio frequency communication module falls into the receiving frequency band of the second radio frequency communication module; therefore, intermodulation interference caused by the first radio frequency communication module to the second radio frequency communication module when the first radio frequency communication module and the second radio frequency communication module simultaneously transmit signals in the related art is reduced or even eliminated, and further the communication performance of the electronic equipment is improved.
Drawings
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another electronic device provided in an embodiment of the present application;
FIG. 3 is a signal flow diagram provided in accordance with an embodiment of the present application;
fig. 4 is a flowchart illustrating a communication interference control method according to an embodiment of the present application;
fig. 5 is a flowchart illustrating another communication interference control method according to an embodiment of the present application.
Detailed Description
In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the attached drawings, the described embodiments should not be considered as limiting the present application, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.
In the following description, references to the terms "first \ second \ third" are only to distinguish similar objects and do not denote a particular order, but rather the terms "first \ second \ third" are used to interchange specific orders or sequences, where appropriate, so as to enable the embodiments of the application described herein to be practiced in other than the order shown or described herein.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the application.
Before further detailed description of the embodiments of the present application, terms and expressions referred to in the embodiments of the present application will be described, and the terms and expressions referred to in the embodiments of the present application will be used for the following explanation.
1) Intermodulation interference is generated by a nonlinear circuit in a transmission channel, when signals of two or more different frequencies are input to the nonlinear circuit, due to the action of the nonlinear device, many harmonics and combined frequency components are generated, wherein the combined frequency components close to the desired signal frequency ω 0 can successfully pass through a receiver to form interference, which is called intermodulation interference.
2) A Central Processing Unit (CPU) generally refers to a platform chip of an electronic device such as a mobile phone, and includes an Application Processor (AP).
3) And a radio frequency Transceiver (2/3/4G).
4) A multi-mode multi-frequency power amplifier (MMMB PA) comprises a 3G/4G PA and supports amplification of a plurality of frequency bands.
5) A Low-Power Wide-Area Network Chip (LPWAN IC) may be used for data transmission, instruction transmission, and implementation of an ad hoc Network technology, and is generally a narrowband communication Chip and operates in an unlicensed frequency band. The LPWAN IC comprises communication chips such as LoRa, sigFox, weightless and the like.
6) The frequency band specified by the combiner duplex, 3GPP has uplink and downlink, and in the 3G and 4G systems of FDD, the uplink and downlink frequencies are different, so that the uplink and downlink need to be distinguished by the combiner on the radio frequency path. Since the electronic device has a plurality of frequency bands, a plurality of combiners are required.
7) A Low frequency Power Amplifier (Low Band Power Amplifier), such as a 2G Low frequency PA for GSM850/GSM900 bands; high frequency Power amplifiers (High Band Power amplifiers), such as 2G High frequency PAs, are used in the GSM1800/GSM1900 bands.
8) And the external low-noise amplifier (LNA) is used for improving the noise coefficient of a link on a receiving path, thereby improving the sensitivity.
9) A Low Pass Filter (LPF) allows signals below the cutoff frequency to Pass, and signals above the cutoff frequency to fail.
10 A Double pole Double throw switch (DPDT).
11 Band Pass Filters (BPFs), which allow waves in a specific frequency Band to Pass while shielding other frequency bands, are typically implemented in SAW, BAW, FBAR, etc. technologies. The 2G/3G/4G has a plurality of frequency bands, and the working frequency of the special Ad-Hoc peer-to-peer multi-hop mobile communication network Ad _ Hoc is also different from that of the 2G/3G/4G.
12 Antenna Switch Module (ASM).
13 Antenna (ANT), cellular communication on electronic devices (2G/3G/4G) typically contains 2 antennas, including main and diversity antennas, and for 5G electronic devices the number of antennas will be even greater.
In the related art, when two radio frequency communication modules of FDD, such as a first radio frequency communication module and a second radio frequency communication module, transmit signals simultaneously, and when a transmission frequency of a signal transmitted by the first radio frequency communication module falls within a receiving frequency band of the second radio frequency communication module, an intermodulation signal is generated, which falls exactly on a receiving channel of the second radio frequency communication module, and causes interference to the second radio frequency communication module. For example, when the LPWAN communication module and the Cellular communication module transmit signals simultaneously, the external LNA on the TRX path of the Cellular communication module may generate intermodulation signals, which fall on the reception channel of the corresponding Cellular frequency band, and cause interference to the Cellular communication module.
An embodiment of the present application provides an electronic device, and as shown in fig. 1, an electronic device 10 includes: a processor 101, a first radio frequency communication module 102, a second radio frequency communication module 103, a first front end module 104, a first antenna 105 and a second antenna 106,
the first radio frequency communication module 102 is connected between the processor 101 and the first antenna 105;
the second radio frequency communication module 103 is connected between the processor 101 and the second antenna 106;
the first front-end module 104 is connected between the second radio frequency communication module 103 and the second antenna 106;
the first front-end module 104 includes at least one first branch, a multi-mode multi-band power amplifier 109 and a first switch module 110, the first branch includes a first band-pass filter 107 and a combiner 108, one end of the first band-pass filter 107 is connected to the second radio frequency communication module 103, the other end of the first band-pass filter 107 is connected to the first input end of the combiner 108, one end of the multi-mode multi-band power amplifier 109 is connected to the second radio frequency communication module 103, the other end of the multi-mode multi-band power amplifier 109 is connected to the second input end of the combiner 108, the output end of the combiner 108 is connected to one end of the first switch module 110, and the other end of the first switch module 110 is connected to the second antenna 106; here, the first input terminal of the combiner 108 is an RX port, and the second input terminal of the combiner 108 is a TX port.
The processor 101 is configured to reduce intermodulation interference of the first radio frequency communication module 102 to the second radio frequency communication module 103 through the first band-pass filter 107 and the combiner 108 when the first radio frequency communication module 102 and the second radio frequency communication module 103 simultaneously transmit signals and a transmission frequency of the signal transmitted by the first radio frequency communication module 102 falls within a receiving frequency band of the second radio frequency communication module 103.
In this embodiment, the first radio frequency communication module is an ad hoc network communication module, the second radio frequency communication module is a cellular communication module, and different first branches correspond to a Band X in a frequency Band where intermodulation interference exists, that is, in this embodiment, an external LNA is removed on a PRX path of the Band X, and 1 RX filter of the Band X is further disposed between a Transceiver of the cellular communication module and an RX port of a Duplexer, so that a TX signal of the Band X is coupled to a path of the LNA in the Transceiver, and needs to be attenuated from a TX port to the RX port in the Duplexer and also passes through the RX filter, thereby reducing or even eliminating intermodulation interference caused by the first radio frequency communication module to the second radio frequency communication module when the first radio frequency communication module and the second radio frequency communication module transmit signals simultaneously, and improving communication performance of the electronic device.
The electronic equipment provided by the embodiment of the application comprises a processor, a first radio frequency communication module, a second radio frequency communication module, a first front-end module, a first antenna and a second antenna, wherein the first radio frequency communication module is connected between the processor and the first antenna; the second radio frequency communication module is connected between the processor and the second antenna; the first front-end module is connected between the second radio frequency communication module and the second antenna; the first front-end module comprises at least one first branch, a multi-mode multi-frequency power amplifier and a first switch module, the first branch comprises a first band-pass filter and a combiner, one end of the first band-pass filter is connected with the second radio frequency communication module, the other end of the first band-pass filter is connected with the first input end of the combiner, one end of the multi-mode multi-frequency power amplifier is connected with the second radio frequency communication module, the other end of the multi-mode multi-frequency power amplifier is connected with the second input end of the combiner, the output end of the combiner is connected with one end of the first switch module, and the other end of the first switch module is connected with the second antenna; the processor is used for reducing intermodulation interference of the first radio frequency communication module to the second radio frequency communication module through the first band-pass filter and the combiner when the first radio frequency communication module and the second radio frequency communication module simultaneously transmit signals and the transmitting frequency of the signals transmitted by the first radio frequency communication module falls into the receiving frequency band of the second radio frequency communication module; therefore, intermodulation interference caused by the first radio frequency communication module to the second radio frequency communication module when the first radio frequency communication module and the second radio frequency communication module simultaneously transmit signals in the related art is reduced or even eliminated, and further the communication performance of the electronic equipment is improved.
An embodiment of the present application provides an electronic device, and as shown in fig. 2, an electronic device 10 includes: a processor 101, a first radio frequency communication module 102, a second radio frequency communication module 103, a first front end module 104, a first antenna 105 and a second antenna 106,
the first radio frequency communication module 102 is connected between the processor 101 and the first antenna 105;
the second radio frequency communication module 103 is connected between the processor 101 and the second antenna 106;
the first front-end module 104 is connected between the second radio frequency communication module 103 and the second antenna 106;
the first front-end module 104 includes at least one first branch, a multi-mode multi-frequency power amplifier 109 and a first switch module 110, the first branch includes a first band-pass filter 107 and a combiner 108, one end of the first band-pass filter 107 is connected with the second radio frequency communication module 103, the other end of the first band-pass filter 107 is connected with a first input end of the combiner 108, one end of the multi-mode multi-frequency power amplifier 109 is connected with the second radio frequency communication module 103, the other end of the multi-mode multi-frequency power amplifier 109 is connected with a second input end of the combiner 108, an output end of the combiner 108 is connected with one end of the first switch module 110, and the other end of the first switch module 110 is connected with the second antenna 106; here, the first input terminal of the combiner 108 is an RX port, and the second input terminal of the combiner 108 is a TX port.
The processor 101 is configured to reduce, by using the first band-pass filter 107 and the combiner 108, intermodulation interference of the first radio-frequency communication module 102 to the second radio-frequency communication module 103 when the first radio-frequency communication module 102 and the second radio-frequency communication module 103 simultaneously transmit signals and a transmission frequency of the signal transmitted by the first radio-frequency communication module 102 falls within a receiving frequency band of the second radio-frequency communication module 103.
In this embodiment, the first rf communication module 102 is an ad hoc network communication module, such as an LPWAN communication module, and the second rf communication module 103 is a Cellular module. The electronic device 10 further includes a second switch module 111, a third antenna 112, and a second front-end module 113; the second switch Guan Mozu is connected between the first switch module 110 and the second antenna 106; the second opening Guan Mozu is connected between the second front end module 113 and the third antenna 112; the second front-end module 113 is connected between the second radio frequency communication module 103 and the second switch module 111; the second front-end module 113 includes at least one second branch, and the second branch includes a second band-pass filter 114 and a third switch module 115 connected in series. Here, the second switch module 111 is a DPDT.
In this embodiment, the first rf communication module 102 includes a first register, where the first register is used to store a first transmission power of the first rf communication module 102;
the processor 101 is further configured to adjust the first transmit power in the first register to obtain a first target transmit power; the first target transmitting power is smaller than the first transmitting power, and the difference value between the first target transmitting power and the first transmitting power is within a first preset difference value range;
the processor 101 is further configured to control the first radio frequency communication module 102 to transmit a signal at a first target transmission power.
In this embodiment, the second rf communication module 103 includes a second register, and the second register is used to store a second transmission power of the second rf communication module 103;
the processor 101 is further configured to adjust a second transmitting power in the second register to obtain a second target transmitting power; the second target transmitting power is smaller than the second transmitting power, and the difference value between the second target transmitting power and the second transmitting power is within a second preset difference value range;
the processor 101 is further configured to control the second radio frequency communication module 103 to transmit a signal at a second target transmission power.
In the embodiment of the present application, the linearity of the first switch module 110, the second switch module 111, and the third switch module 115 meets a preset linearity threshold.
In the embodiment of the present application, the first switch module 110 includes a high-frequency power amplifier HB, a low-frequency power amplifier LB, a first low-pass filter, a second low-pass filter, and an antenna switch module;
the high-frequency power amplifier, the first low-pass filter and the antenna switch module are arranged between the second radio-frequency communication module 103 and the second switch module 111 in series;
the low frequency power amplifier, the second low pass filter and the antenna switch module are arranged in series between the second radio frequency communication module 103 and the second switch module 111.
By way of example, the Processor 101 may be an integrated circuit chip having Signal processing capabilities, such as a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like, wherein the general purpose Processor may be a microprocessor or any conventional Processor or the like.
In the embodiment of the application, the first front-end module is responsible for a TRX path and comprises a TX transmission path and a PRX main receiving path; the second front end module is responsible for the DRX path, i.e. contains the DRX diversity reception path. Fig. 2 only schematically shows a first branch in the first front-end module, that is, a branch where the first bandpass filter 107 and the combiner 108 are located, at this time, the intermodulation signal happens to fall on the reception channel of LTE, and interference is caused to LTE Band X corresponding to the branch where the first bandpass filter 107 and the combiner 108 are located.
In an implementation scenario, assuming that the LPWAN communication module works at 868MHz frequency point, and the Cellular communication module works at 20615ch,845.5MHz of LTE Band5 uplink channel, when the LPWAN communication module and the Cellular communication module simultaneously perform TX, a signal of intermodulation frequency point 890.5MHz is generated on the TRX link, and the signal just falls on the downlink channel 2615ch,890.5MHz corresponding to the LTE Band5 uplink channel 20615ch, and when the intermodulation signal is not sufficiently small, interference is generated on the LTE Band. The intermodulation interference occurs in some channels of individual frequency bands, which is related to the operating frequency of LPWAN and Band, channel and bandwidth of Cellular.
One important interference path analyzed at present is: signals of the LPWAN communication module are coupled to a TRX link entering the Cellular communication module through an antenna, and because 868MHz is close to 869-894MHz of a Band5 RX frequency Band, the duplex of the Band5 has little inhibition on 868MHz, and signals of 868MHz from the LPWAN module still have certain energy entering an external LNA of the Band 5.
Due to the limited isolation of the Duplexer, the TX signal of Band5 also has a part of energy signal entering the external LNA of Band 5.
Due to the limited linearity of the external LNA, when the transmission power of the LPWAN communication module and the transmission power of the LTE are large, the signals coupled to the input end of the external LNA are not very small, for example, the signal has an energy level of-30 to 0dBm, a certain third-order intermodulation signal is generated on the external LNA of the Band5, and the intermodulation signal just falls on the reception channel of the LTE at this time, so as to cause interference to the LTE Band 5.
Currently, the positioning external LNA is an important source for generating intermodulation signals, and in order to solve/alleviate the intermodulation interference, the external LNA corresponding to Band5 is removed. However, the inventors of the present application have found that even if the external LNA is removed, the intermodulation signal may be generated by the LNA within the Transceiver. For this reason, referring to fig. 3, for Band X in the frequency Band where intermodulation interference occurs, on the PRX path of Band X, not only the external LNA is removed, but also 1 RX filter of Band X is further disposed between the RX ports of the transmitter and the Duplexer, the filter is of the BPF, the passband of the BPF is the reception frequency Band of Band X, and the filter is also called BPF of the Band X downlink frequency Band. Thus, the path of coupling the TX signal of Band X to the LNA in the Transceiver needs to be attenuated from the TX port to the RX port in the Duplexer and also through the RX filter, and the cross sign in fig. 3 indicates that the TX signal cannot enter the Transceiver. According to a calculation formula of third-order passive intermodulation, the energy of an intermodulation source is reduced, and the energy of an intermodulation product can be obviously reduced.
Further, if the power of the LPWAN communication module and the power of the Cellular communication module are too large, the external LNA is removed, and the intermodulation interference of LPWAN to Cellular cannot be completely solved by setting 1 Band X RX filter between RX ports of Transceiver and Duplexer, the electronic device performs power backoff on LPWAN or/and Cellular. In the power back-off process, the electronic device adjusts the first transmitting power in the first register and/or adjusts the second transmitting power in the second register in real time through the processor, so that intermodulation interference is further reduced.
In some embodiments of the present application, radio frequency devices such as a DPDT and an ASM with higher linearity may be used in the electronic device. Thus, with a higher linearity device, the less the intermodulation product energy generated on the link is, the less the intermodulation product interference is generated, at the same transmitting power of the LPWAN communication module and the Cellular communication module.
An embodiment of the present application provides a communication interference control method, which is applied to the electronic device 10 provided in the foregoing embodiment, and as shown in fig. 4, the method includes:
step 201, when it is determined that the first radio frequency communication module and the second radio frequency communication module simultaneously transmit signals, the transmission frequency of the signals transmitted by the first radio frequency communication module falls within the receiving frequency band of the second radio frequency communication module.
Step 202, reducing intermodulation interference of the first radio frequency communication module to the second radio frequency communication module through the first band-pass filter and the combiner.
The communication interference control method provided by the embodiment of the application determines that when a first radio frequency communication module and a second radio frequency communication module simultaneously transmit signals, the transmission frequency of the signals transmitted by the first radio frequency communication module falls in the receiving frequency band of the second radio frequency communication module; the intermodulation interference of the first radio frequency communication module to the second radio frequency communication module is reduced through the first band-pass filter and the combiner, so that the intermodulation interference of the first radio frequency communication module to the second radio frequency communication module is reduced or even eliminated, and the communication performance of the electronic equipment is further improved.
An embodiment of the present application provides a communication interference control method, which is applied to the electronic device 10 provided in the foregoing embodiment, and as shown in fig. 5, the method includes:
step 301, when it is determined that the first radio frequency communication module and the second radio frequency communication module simultaneously transmit signals, the transmission frequency of the signals transmitted by the first radio frequency communication module falls within the receiving frequency band of the second radio frequency communication module.
Step 302, reducing intermodulation interference of the first radio frequency communication module to the second radio frequency communication module through the first band-pass filter and the combiner.
Step 303, adjusting a first transmission power in a first register of the first radio frequency communication module to obtain a first target transmission power.
The first target transmitting power is smaller than the first transmitting power, and the difference value between the first target transmitting power and the first transmitting power is within a first preset difference value range.
Step 304, controlling the first radio frequency communication module to transmit signals with the first target transmission power.
Step 305, adjusting a second transmitting power in a second register of the second radio frequency communication module to obtain a second target transmitting power.
And the second target transmitting power is smaller than the second transmitting power, and the difference value between the second target transmitting power and the second transmitting power is within a second preset difference value range.
And step 306, controlling the second radio frequency communication module to transmit signals at the second target transmission power.
In the embodiment of the application, when the electronic device transmits signals simultaneously by using the first radio frequency communication module and the second radio frequency communication module, and the first radio frequency communication module causes intermodulation interference to the second radio frequency communication module, the electronic device not only reduces the intermodulation interference to the second radio frequency communication module by using the first band-pass filter and the combiner, but also can further reduce the intermodulation interference by adjusting the transmission power of the first radio frequency communication module and/or the second radio frequency communication module; here, in the process of reducing the transmission power, the electronic device first reduces the first transmission power of the first radio frequency communication module, and if the first transmission power is reduced to the first target transmission power and intermodulation interference still exists, the second transmission power of the second radio frequency communication module continues to be reduced, that is, in the process of adjusting the transmission power of the first radio frequency communication module and the transmission power of the second radio frequency communication module, the adjustment is limited and cannot be lower than the threshold, so that the communication performance of the electronic device is ensured.
It should be noted that, for the descriptions of the same steps and the same contents in this embodiment as those in other embodiments, reference may be made to the descriptions in other embodiments, which are not described herein again.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application.

Claims (6)

1. An electronic device, characterized in that the electronic device comprises: a processor, an ad hoc network communication module, a cellular communication module, a first front end module, a first antenna, and a second antenna,
the ad hoc network communication module is connected between the processor and the first antenna;
the cellular communication module is connected between the processor and the second antenna;
the first front end module is connected between the cellular communication module and the second antenna;
the first front-end module comprises at least one first branch, a multi-mode multi-frequency power amplifier and a first switch module, wherein the first branch comprises a first band-pass filter and a combiner, one end of the first band-pass filter is connected with the cellular communication module, the other end of the first band-pass filter is connected with an RX port of the combiner, one end of the multi-mode multi-frequency power amplifier is connected with the cellular communication module, the other end of the multi-mode multi-frequency power amplifier is connected with a TX port of the combiner, the output end of the combiner is connected with one end of the first switch module, and the other end of the first switch module is connected with the second antenna;
the electronic device further includes: a second switch module, a third antenna and a second front-end module,
the second switch module is connected between the first switch module and the second antenna;
the second opening Guan Mozu is connected between the second front end module and the third antenna;
the second front end module is connected between the cellular communication module and the second switch module;
the second front-end module comprises at least one second branch, and the second branch comprises a second band-pass filter and a third switch module which are connected in series;
the first front-end module is responsible for a TRX path and comprises a TX transmitting path and a PRX main receiving path; the second front-end module is responsible for a DRX path, including a DRX diversity reception path;
the processor is configured to reduce, by the first bandpass filter and the combiner, intermodulation interference of the ad hoc network communication module with the cellular communication module when the ad hoc network communication module and the cellular communication module transmit signals simultaneously and a transmission frequency of the ad hoc network communication module for transmitting the signals falls within a reception frequency band of the cellular communication module;
the self-networking communication module comprises a first register, a second register and a third register, wherein the first register is used for storing first transmission power of the self-networking communication module;
the processor is further configured to adjust a first transmit power in the first register to obtain a first target transmit power; the first target transmission power is smaller than the first transmission power, and the difference value between the first target transmission power and the first transmission power is within a first preset difference value range;
the processor is further configured to control the ad hoc network communication module to transmit a signal at the first target transmission power.
2. The electronic device of claim 1, wherein the cellular communication module comprises a second register to store a second transmit power of the cellular communication module;
the processor is further configured to adjust a second transmit power in the second register to obtain a second target transmit power; the second target transmitting power is smaller than the second transmitting power, and the difference value between the second target transmitting power and the second transmitting power is within a second preset difference value range;
the processor is further configured to control the cellular communication module to transmit a signal at the second target transmit power.
3. The electronic device of claim 1, wherein a linearity of the first switch module, the second switch module, and the third switch module meets a preset linearity threshold.
4. The electronic device of claim 1, wherein the first switching module comprises a high frequency power amplifier, a low frequency power amplifier, a first low pass filter, a second low pass filter, and an antenna switching module;
wherein the high frequency power amplifier, the first low pass filter, and the antenna switch module are disposed in series between the cellular communication module and the second switch module;
the low frequency power amplifier, the second low pass filter and the antenna switch module are arranged in series between the cellular communication module and the second switch module.
5. A communication interference control method applied to the electronic device of any one of claims 1 to 4, the method comprising:
determining that the transmitting frequency of the signal transmitted by the ad hoc network communication module falls within the receiving frequency band of the cellular communication module when the ad hoc network communication module and the cellular communication module transmit the signal simultaneously;
reducing intermodulation interference of the ad hoc network communication module to the cellular communication module by the first band-pass filter and the combiner;
wherein the method further comprises:
adjusting a first transmitting power in a first register of the ad hoc network communication module to obtain a first target transmitting power; the first target transmission power is smaller than the first transmission power, and the difference value between the first target transmission power and the first transmission power is within a first preset difference value range;
and controlling the ad hoc network communication module to transmit signals at the first target transmission power.
6. The communication interference control method of claim 5, further comprising:
adjusting a second transmitting power in a second register of the cellular communication module to obtain a second target transmitting power; the second target transmitting power is smaller than the second transmitting power, and the difference value between the second target transmitting power and the second transmitting power is within a second preset difference value range;
controlling the cellular communication module to transmit signals at the second target transmit power.
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