CN114844522A - Communication circuit, interference suppression method thereof and terminal equipment - Google Patents
Communication circuit, interference suppression method thereof and terminal equipment Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 21
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- 230000006855 networking Effects 0.000 claims description 18
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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
- 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
- H04L5/1415—Two-way operation using the same type of signal, i.e. duplex using control lines
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- 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
- H04L5/1461—Suppression of signals in the return path, i.e. bidirectional control circuits
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- 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 invention discloses a communication circuit, an interference suppression method thereof and terminal equipment, wherein the communication circuit comprises: a first communication link comprising a first antenna; a second communication link comprising a second antenna; the first filter is arranged corresponding to the first communication link; the selection unit is configured to select the first filter to filter the harmonic signal when the harmonic signal of the working frequency band of the first communication link falls into the working frequency band of the second communication link, so as to reduce the signal coupling of the first antenna to the second antenna. The circuit not only can effectively reduce the signal interference of the first communication link to the second communication link, but also can reduce the path loss of the first communication link in other frequency bands, and improve the radio frequency performance of other frequency bands.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a communication circuit, an interference suppression method thereof, and a terminal device.
Background
Under the application scene of 5G enhanced mobile bandwidth, the geometrically increased mass data requirement puts an unprecedented demand on the data communication capacity of a personal mobile terminal, and two deployment schemes of 5G NSA (Non-Standard, Non-independent networking) and SA (Standard, independent networking) are related to key scheme support in the aspect of improving the communication rate. For a terminal, NSA needs LTE (Long Term Evolution) and NR (New Radio) to operate simultaneously, and SA only needs NR to operate.
Due to the small coverage area of the current 5G base station and different 4G to 5G evolution strategies of each country, the global-wide ENDC (E-UTRA NR Dual Connectivity, 4G and 5G Dual Connectivity) scheme will become an important 5G coverage scheme for a long time, that is, the 4G and 5G Dual Connectivity scheme is adopted to ensure the signal continuity in the area where the 5G signal is unstable or uncovered. However, in the NSA endec mode and the dual card mode, LTE and NR operate simultaneously, and thus there is a problem of signal interference.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first object of the present invention is to provide a communication circuit, which can not only effectively reduce the signal interference of the first communication link to the second communication link, but also reduce the path loss of the first communication link in other frequency bands, and improve the radio frequency performance of other frequency bands.
A second object of the present invention is to provide a terminal device.
A third object of the present invention is to provide an interference suppression method for a communication circuit.
To achieve the above object, an embodiment of a first aspect of the present invention provides a communication circuit, including: a first communication link comprising a first antenna; a second communication link comprising a second antenna; the first filter is arranged corresponding to the first communication link; the selection unit is configured to select the first filter to filter the harmonic signal when the harmonic signal of the working frequency band of the first communication link falls into the working frequency band of the second communication link, so as to reduce the signal coupling of the first antenna to the second antenna.
According to the communication circuit provided by the embodiment of the invention, the first filter is arranged corresponding to the first communication link, and when the harmonic signal of the working frequency band of the first communication link falls into the working frequency band of the second communication link, the selection unit selects the first filter to filter the harmonic signal so as to reduce the signal coupling of the first antenna to the second antenna, thereby effectively reducing the signal interference of the first communication link to the second communication link, and in other frequency bands, the selection unit does not select the first filter to filter the harmonic signal, thereby effectively reducing the path loss of the first communication link in other frequency bands and improving the radio frequency performance of other frequency bands.
According to an embodiment of the present invention, the first communication link further includes a first power amplifier, a first selection switch unit, at least one first duplexer, and a second selection switch unit, an input end of the first power amplifier is connected to a first transmitting end of the transceiver, the first power amplifier, the first selection switch unit, the at least one first duplexer, and the second selection switch unit are sequentially connected and then connected to the first antenna, wherein the selection unit connects the first filter to between the first power amplifier and the at least one first duplexer by configuring a connection relationship between the first filter and the first selection switch unit.
According to an embodiment of the present invention, the first communication link further includes a first power amplifier, a first selection switch unit, at least one first duplexer, and a second selection switch unit, an input end of the first power amplifier is connected to a first transmitting end of the transceiver, the first power amplifier, the first selection switch unit, the at least one first duplexer, and the second selection switch unit are sequentially connected and then connected to the first antenna, wherein the selection unit connects the first filter to between the at least one first duplexer and the first antenna by configuring a connection relationship between the first filter and the second selection switch unit.
According to an embodiment of the present invention, the first communication link further comprises a third switch selection unit and a first low noise amplifier, the third switch selection unit is connected to the at least one first duplexer and the first low noise amplifier, respectively, and an output terminal of the first low noise amplifier is connected to the first receiving terminal of the transceiver.
According to an embodiment of the present invention, the second communication link further includes a second power amplifier, a fourth selection switch unit, and a second filter, an input end of the second power amplifier is connected to the second transmitting end of the transceiver, and the second power amplifier, the fourth selection switch unit, and the second filter are connected in sequence and then connected to the second antenna.
According to an embodiment of the invention, the second communication link further comprises a second low noise amplifier, an input of the second low noise amplifier is connected to the fourth selection switch unit, and an output of the second low noise amplifier is connected to the second receiving terminal of the transceiver.
According to one embodiment of the invention, the first communication link is configured as an LTE circuit and the second communication link is configured as an NR circuit.
According to one embodiment of the invention, the communication circuit operates in a dual card mode, a non-standalone networking mode, and a non-5G band mode.
According to an embodiment of the present invention, the selection unit includes a memory in which switch control information corresponding to each mode is stored, wherein when the communication circuit operates in the dual card mode or the non-independent networking mode, the memory is configured to read the corresponding switch control information when determining that the harmonic signal of the operating frequency band of the first communication link falls into the operating frequency band of the second communication link, so as to select the first filter to filter the harmonic signal.
In order to achieve the above object, a second embodiment of the present invention provides a terminal device, which includes the foregoing communication circuit.
According to the terminal device of the embodiment of the invention, through the communication circuit, not only can the signal interference of the first communication link to the second communication link be effectively reduced, but also the path loss of the first communication link in other frequency bands can be reduced, and the radio frequency performance of other frequency bands can be improved.
In order to achieve the above object, an embodiment of a third aspect of the present invention provides an interference suppression method for a communication circuit, where the communication circuit includes a first communication link, a second communication link, and a first filter, and the first filter is disposed corresponding to the first communication link, the method includes: determining the working mode of the communication circuit and the working frequency bands of the first communication link and the second communication link in the working mode; determining switch control information based on the working mode and the working frequency bands of the first communication link and the second communication link in the working mode; and controlling whether the first filter is accessed to the first communication link or not according to the switch control information.
According to the interference suppression method for the communication circuit, provided by the embodiment of the invention, the first filter is arranged in the first communication link of the communication circuit, the switch control information is determined based on the working mode of the communication circuit and the working frequency bands of the first communication link and the second communication link in the working mode, and whether the first filter is connected to the first communication link is controlled according to the switch control information, so that when a harmonic signal of the working frequency band of the first communication link falls into the working frequency band of the second communication link, the harmonic signal is filtered by the first filter, the signal interference of the first communication link to the second communication link is reduced, and in other frequency bands, the path loss of the first communication link is reduced by not connecting the first filter, and the radio frequency performance of other frequency bands is improved.
According to an embodiment of the present invention, determining the switch control information based on the operating mode and the operating frequency bands of the first communication link and the second communication link in the operating mode includes: and determining that the working mode is a non-5G frequency band mode, wherein the switch control information is first switch control information to indicate that the first filter is not accessed to the first communication link.
According to an embodiment of the present invention, determining the switch control information based on the operating mode and the operating frequency bands of the first communication link and the second communication link in the operating mode includes: determining that the working mode is a dual-card mode or a non-5G frequency band mode, the harmonic signal of the working frequency band of the first communication link falls into the working frequency band of the second communication link, and the switch control information is second switch control information to indicate that the first filter is accessed into the first communication link; and determining that the working mode is a dual-card mode or a non-5G frequency band mode, the harmonic signal of the working frequency band of the first communication link does not fall into the working frequency band of the second communication link, and the switch control information is first switch control information to indicate that the first filter is not accessed into the first communication link.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic diagram of a communication circuit according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a communication circuit according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of a communication circuit according to yet another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating an interference suppression method for a communication circuit according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
A communication circuit, an interference suppression method thereof, and a terminal device according to an embodiment of the present invention are described below with reference to the drawings.
Fig. 1 is a schematic structural diagram of a communication circuit according to an embodiment of the present invention. Referring to fig. 1, the communication circuit includes: a first communication link 110, a second communication link 120, a first filter 112 and a selection unit 113. Wherein the first communication link 110 comprises a first antenna 111; the second communication link 120 includes a second antenna 121; the first filter 112 is disposed in correspondence with the first communication link 110; the selection unit 113 is configured to select the first filter 112 to filter the harmonic signals when the harmonic signals of the operating frequency band of the first communication link 110 fall into the operating frequency band of the second communication link 120, so as to reduce the signal coupling of the first antenna 111 to the second antenna 121.
It should be noted that the first filter 112 can selectively access the first communication link 110, and the selecting unit 113 can determine whether to access the first filter 112 to the first communication link 110 according to the signal interference condition of the first communication link 110 to the second communication link 120. Upon access, the first filter 112 filters the harmonic signals generated by the first communication link 110 to reduce the effect of the harmonic signals on the second communication link 120; when the communication link is not accessed, the first filter 112 is absent, so that the path loss of the first communication link 110 can be reduced, and the radio frequency performance of the first communication link 110 when the communication link is not accessed can be improved.
Specifically, when the first communication link 110 and the second communication link 120 operate simultaneously, the selection unit 113 first determines an operating frequency band of the first communication link 110 and an operating frequency band of the second communication link 120, and determines a harmonic signal corresponding to the operating frequency band of the first communication link 110. If the harmonic signal falls within the operating frequency band of the second communication link 120, then as the harmonic signal passes from the first antenna 111 of the first communication link 110 to the second antenna 121 of the second communication link 120, since the harmonic signal falls within the operating frequency band of the second communication link 120, the second communication link 120 cannot filter out the harmonic signal, causing signal interference to the second path link 120, resulting in a decrease in the reception sensitivity of the second communication link 120, and thus the throughput rate is decreased or the line is dropped, if the selection unit 113 selects the first filter 112 to filter the harmonic signal, interference of the harmonic signal into the second communication link 120 to the signal of the second communication link 120 can be avoided, the receiving sensitivity of the second communication link 120 is ensured, thereby ensuring the throughput rate of the second communication link 120 and avoiding the second communication link 120 from being disconnected.
When the first communication link 110 and the second communication link 120 do not operate simultaneously, or operate simultaneously but the harmonic signal of the operating frequency band of the first communication link 110 does not fall into the operating frequency band of the second communication link 120, the selection unit 113 does not select the first filter 112 to access the first communication link 110, and since the links lack the first filter 112, the path loss of the first communication link 110 can be reduced, thereby improving the radio frequency performance when the first communication link 110 and the second communication link 120 do not operate simultaneously or the harmonic signal of the operating frequency band of the first communication link 110 does not affect the second communication link 120.
In the above embodiment, the selection unit selectively accesses the first filter to the first communication link based on the signal interference condition of the first communication link to the second communication link, so that not only can the signal interference of the first communication link to the second communication link be effectively reduced, but also the path loss of the first communication link when the first communication link is in other frequency bands or two links are not working simultaneously can be reduced, and the radio frequency performance of the first communication link is improved.
In some embodiments, referring to fig. 2, the first communication link 110 further includes a first power amplifier 114, a first selection switch unit 115, at least one first duplexer 116, and a second selection switch unit 117, an input end of the first power amplifier 114 is connected to a first transmitting end of the transceiver 200, the first power amplifier 114, the first selection switch unit 115, the at least one first duplexer 116, and the second selection switch unit 117 are sequentially connected and then connected to the first antenna 111, wherein the selection unit 113 configures a connection relationship between the first filter 112 and the first selection switch unit 115, so that the first filter 112 is connected between the first power amplifier 114 and the at least one first duplexer 116.
Specifically, when the first communication link 110 and the second communication link 120 operate simultaneously, the selection unit 113 determines whether a harmonic signal of an operating frequency band of the first communication link 110 falls into an operating frequency band of the second communication link 120, and if the harmonic signal falls into the operating frequency band, the selection unit 113 configures a connection relationship between the first filter 112 and the first selection switch unit 115, for example, the first end of the first selection switch unit 115 is connected to the second end, and the third end is connected to the fourth end or the fifth end or the sixth end of the first selection switch unit 115, so that the first filter 112 is connected between the first power amplifier 114 and at least one first duplexer 116, and at this time, a signal transmitted by the transceiver 200 through the first transmission end is amplified by the first power amplifier 114, filtered by the first filter 112, and then transmitted to the outside through the first duplexer 116, the second selection switch unit 117, and the first antenna 111. When the signal enters the second communication link 120 through the second antenna 121, the harmonic signal generated by the first communication link 110 is filtered by the first filter 112, and therefore does not interfere with the second communication link 120.
When the first communication link 110 and the second communication link 120 do not operate simultaneously, or the harmonic signal of the operating frequency band of the first communication link 110 does not fall into the operating frequency band of the second communication link 120, the selection unit 113 configures the connection relationship between the first filter 112 and the first selection switch unit 115, for example, the first end and the fourth end or the fifth end or the sixth end of the first selection switch unit 115 are connected, so that the first filter 112 is no longer connected between the first power amplifier 114 and the at least one first duplexer 116, and at this time, the signal sent by the transceiver 200 through the first sending end is amplified by the first power amplifier 114 and then transmitted to the outside through the first duplexer 116, the second selection switch unit 117 and the first antenna 111. The signal enters the second communication link 120 through the second antenna 121, which does not cause interference to the second communication link 120, and meanwhile, since the first filter 112 in the first communication link 110 does not work, the path loss of the first communication link 110 can be reduced, thereby improving the radio frequency performance thereof.
In other embodiments, referring to fig. 3, the first communication link 110 further includes a first power amplifier 114, a first selection switch unit 115, at least one first duplexer 116, and a second selection switch unit 117, an input end of the first power amplifier 114 is connected to a first transmitting end of the transceiver 200, the first power amplifier 114, the first selection switch unit 115, the at least one first duplexer 116, and the second selection switch unit 117 are sequentially connected and then connected to the first antenna 111, wherein the selection unit 113 configures a connection relationship between the first filter 112 and the second selection switch unit 117, so that the first filter 112 is connected between the at least one first duplexer 116 and the first antenna 111.
Specifically, when the first communication link 110 and the second communication link 120 operate simultaneously, the selection unit 113 determines whether a harmonic signal of the operating frequency band of the first communication link 110 falls into the operating frequency band of the second communication link 120, and if the harmonic signal falls into the operating frequency band, the selection unit 113 configures a connection relationship between the first filter 112 and the second selection switch unit 117, for example, the first end, the second end, or the third end of the second selection switch unit 117 is connected to the fourth end, so that the first filter 112 is connected between the at least one first duplexer 116 and the first antenna 111, and at this time, a signal transmitted by the transceiver 200 through the first transmission end sequentially passes through the first power amplifier 114 for amplification, the first duplexer 116, and the second selection switch unit 117 to enter the first filter 112, and is filtered by the first filter 112 and then passes through the first antenna 111 to the outside. When the signal enters the second communication link 120 through the second antenna 121, the harmonic signal generated by the first communication link 110 is filtered by the first filter 112, and therefore does not interfere with the second communication link 120.
When the first communication link 110 and the second communication link 120 do not operate simultaneously, or the harmonic signal of the operating frequency band of the first communication link 110 does not fall into the operating frequency band of the second communication link 120, the selection unit 113 configures the connection relationship between the first filter 112 and the second selection switch unit 117, for example, the first end, the second end, or the third end of the second selection switch unit 117 is connected to the fifth end, so that the first filter 112 is no longer connected between the at least one first duplexer 116 and the first antenna 111, and at this time, the signal sent by the transceiver 200 through the first sending end is amplified by the first power amplifier 114 and then transmitted to the outside through the first duplexer 116, the second selection switch unit 117, and the first antenna 111. The signal enters the second communication link 120 through the second antenna 121, which does not cause interference to the second communication link 120, and meanwhile, since the first filter 112 in the first communication link 110 does not work, the path loss of the first communication link 110 can be reduced, thereby improving the radio frequency performance thereof.
In some embodiments, referring to fig. 2-3, the first communication link 110 further includes a third switch selection unit 118 and a first low noise amplifier 119, the third switch selection unit 118 is connected to at least one first duplexer 116 and the first low noise amplifier 119, respectively, and an output terminal of the first low noise amplifier 119 is connected to a first receiving terminal of the transceiver 200.
Specifically, when the transceiver 200 receives a signal through the first receiving end, the signal may sequentially pass through the first antenna 111, the second selection switch unit 117, the at least one first duplexer 116, and the third selection switch unit 118 to enter the first low noise amplifier 119, and then enter the transceiver 200 after being low-noise amplified by the first low noise amplifier 119, thereby implementing signal reception.
It should be noted that the selective use of the at least one first duplexer 116 may be selected through the first selection switch unit 115, the second selection switch unit 117, and the third selection switch unit 118 according to actual requirements, and is not limited herein.
In some embodiments, referring to fig. 2 to fig. 3, the second communication link 120 further includes a second power amplifier 122, a fourth selection switch unit 123, and a second filter 124, an input end of the second power amplifier 122 is connected to the second transmitting end of the transceiver 200, and the second power amplifier 122, the fourth selection switch unit 123, and the second filter 124 are connected in sequence and then connected to the second antenna 121.
Specifically, when the transceiver 200 transmits a signal through the second transmitting end, the signal may sequentially pass through the second power amplifier 122 for amplification, the fourth selection switch unit 123 for entering the second filter 124, and the signal is filtered by the second filter 124 and then transmitted to the outside through the second antenna 121, and since the second filter 124 can filter the harmonic signal generated by the second communication link 120, the signal transmitted to the outside through the second communication link 120 does not cause interference to the first communication link 110. It should be noted that, in order to reduce the path loss of the second communication link 120, the second filter 124 may also be set in the same setting as the first filter 112, and specifically, the setting of the first filter 112 may be referred to, and details are not described here.
In some embodiments, with continued reference to fig. 2-3, the second communication link 120 further includes a second low noise amplifier 125, an input of the second low noise amplifier 125 is connected to the fourth selection switch unit 123, and an output of the second low noise amplifier 125 is connected to the second receiving end of the transceiver 200.
Specifically, when the transceiver 200 receives a signal through the second receiving end, the signal may pass through the second filter 124 for interference filtering, and then enter the transceiver 200 after being amplified by the fourth selection switch unit 123 and the second low noise amplifier 125, so as to implement signal reception.
In some embodiments, the first communication link 110 is configured as an LTE circuit, and the second communication link 120 is configured as an NR circuit, that is, the first communication link 110 is used for implementing LTE signaling and the second communication link 120 is used for implementing NR signaling, so as to be suitable for the current 5G coverage scheme.
Note that LTE has a plurality of operating bands such as LB (Low Band), MB (Middle Band), and HB (High Band), and NR has a plurality of operating bands such as LB, MB, HB, and SUB6G (electromagnetic waves having a frequency lower than 6 GHz), and any combination of these two can form a variety of endec schemes, such as LB + LB, LB + MB, LB + HB, MB + HB, LB + SUB6G, MB + SUB6G, and HB + SUB 6G. However, when both are operating simultaneously, there may be signal interference.
For example, when the LTE circuit and the NR circuit operate simultaneously, assuming that the transmission frequency of LTE is 1750MHz, the frequency of the second harmonic signal of LTE is 3500MHz, and the reception frequency of NR is 3500MHz, the harmonic signal of the LTE circuit enters the NR circuit along with the coupling of the first antenna 111 to the second antenna 121, because the reception frequency of NR is the same as the frequency of the second harmonic signal of LTE, the NR circuit cannot filter the harmonic signal, so that the reception sensitivity of the NR circuit deteriorates, and the throughput rate decreases or drops, and if the selection unit 113 selects the first filter 112 to access the LTE circuit at this time, the harmonic signal is filtered, and the harmonic signal cannot be coupled to the second antenna 121 through the first antenna 111 and enters the NR circuit, so that the reception sensitivity of the NR circuit is ensured, and the throughput rate is ensured and the drop is avoided. When the LTE circuit and the NR circuit do not operate simultaneously or the harmonic signal of the LTE circuit is different from the reception frequency of the NR circuit, if the first filter 112 is continuously selected for filtering at this time, the path loss of the LTE circuit is increased, and therefore the selection unit 113 does not select the first filter 112 to access the LTE circuit, so that the path loss of the LTE circuit is reduced, and the radio frequency performance of the LTE circuit is ensured.
In the above embodiment, the first filter is selectively accessed to the LTE circuit by the selection unit based on the signal interference condition of the LTE circuit to the NR circuit, so that not only can the signal interference of the LTE circuit to the NR circuit be effectively reduced, but also the path loss of the LTE circuit when other frequency bands or two circuits do not work simultaneously can be reduced, the radio frequency performance of the LTE circuit is improved, and the current 5G coverage scheme is facilitated.
In some embodiments, the communication circuit operates in a dual card mode, a non-standalone networking mode, a non-5G band mode. Further, in some embodiments, the selection unit 113 includes a memory in which the switch control information corresponding to each mode is stored, wherein when the communication circuit operates in the dual card mode or the non-independent networking mode, the memory is configured to read the corresponding switch control information when determining that the harmonic signal of the operating frequency band of the first communication link 110 falls into the operating frequency band of the second communication link 120, so as to select the first filter 112 to filter the harmonic signal.
Specifically, the memory stores switch control information corresponding to each mode, as shown in table 1:
TABLE 1
| Networking mode | Switch control information |
| non-5G band mode | A |
| Non-independent networking mode | B |
| Dual card mode | C |
In table 1, a represents information that the first filter 112 does not access the first communication link 110; b and C indicate that further determination according to the operating frequency bands of LTE and NR is required, as shown in tables 2 and 3:
TABLE 2
| LTE frequency band in non-independent networking mode | NR frequency band in non-independent networking mode | Switch control information |
| X1 frequency band | Y1 frequency band | B1 |
| X2 frequency band | Y2 frequency band | B2 |
| ... | ... | ... |
In table 2, B1 and B2 indicate switch control information corresponding to different LTE and NR frequency bands in the non-independent networking mode, including information that the first filter 112 has or has not accessed the first communication link 110.
TABLE 3
In table 3, C1 and C2 indicate switch control information corresponding to different LTE and NR frequency bands in the dual card mode, including information that the first filter 112 has or has not access to the first communication link 110.
In the working process, referring to fig. 2, when the communication circuit adopts the non-5G frequency band mode, the communication circuit may work in the 2G, 3G or 4G frequency band, at this time, the non-5G frequency band signal sent by the transceiver 200 is amplified by the first power amplifier 114, because the switch control information corresponding to the non-5G frequency band mode stored in the memory is that the first filter 112 is not connected to the first communication link 110, the first end of the first selection switch unit 115 is connected to the fourth end, the fifth end or the sixth end, so that the amplified signal directly enters the first duplexer 116 through the first selection switch unit 115 and is transmitted to the outside through the second selection switch unit 117 and the first antenna 111. Since the first filter 112 is omitted from the first communication link 110, the path loss of the communication link is reduced in this mode, and the radio frequency performance of all frequency bands in this mode is improved.
When the communication circuit adopts the dependent networking mode, the LTE signal transmitted by the transceiver 200 is amplified by the first power amplifier 114, and since the switch control information corresponding to the dependent networking mode stored in the memory is related to the LTE frequency band and the NR frequency band in this mode, the final switch control information is also determined based on the LTE frequency band and the NR frequency band. Supposing that the harmonic signal of the LTE band falls into the NR band, the first end of the first selection switch unit 115 is connected to the second end, and the third end is connected to the fourth end, fifth end, or sixth end, the amplified signal enters the first duplexer 116 through the first filter 112, and is transmitted outward through the second selection switch unit 117 and the first antenna 111, and since the first filter 112 filters the harmonic signal of the LTE band, the energy of the harmonic signal coupled to the second antenna 121 through the first antenna 111 is very weak, which is not enough to affect the receiving sensitivity of NR, thereby ensuring the radio frequency performance such as the throughput of NR; if the harmonic signal of the LTE band does not fall into the NR band, the first end of the first selection switch unit 115 is connected to the fourth end, the fifth end, or the sixth end, so as to avoid passing through the first filter 112, and avoid the influence on the radio frequency performance corresponding to the band due to the increased path loss.
When the communication circuit adopts the dual card mode, the working principle is the same as that of the non-independent networking mode, and specific reference is made to the non-independent networking mode, which is not described herein again.
In the above embodiment, by selectively accessing the first filter, under the dual-card mode, the non-independent networking mode, and the non-5G frequency band mode, the path loss can be reduced as much as possible without causing interference to NR, the radio frequency performance of the path is ensured, and under the condition of causing interference to NR, the interference to the NR is reduced as much as possible, the throughput rate is improved, and the user experience is improved. It should be noted that, for the interference situation of NR to LTE, the interference situation of LTE to NR may be referred to, and details are not repeated here.
In summary, according to the communication circuit in the embodiment of the present invention, the first filter is disposed corresponding to the first communication link, and when the harmonic signal of the working frequency band of the first communication link falls into the working frequency band of the second communication link, the selection unit selects the first filter to filter the harmonic signal, so as to reduce the signal coupling of the first antenna to the second antenna, thereby effectively reducing the signal interference of the first communication link to the second communication link, and in other frequency bands, the selection unit does not select the first filter to filter the harmonic signal, thereby effectively reducing the path loss of the first communication link in other frequency bands, and improving the radio frequency performance in other frequency bands.
Fig. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present invention, and referring to fig. 4, the terminal device 1000 includes the foregoing communication circuit 100.
According to the terminal device of the embodiment of the invention, through the communication circuit, not only can the signal interference of the first communication link to the second communication link be effectively reduced, but also the path loss of the first communication link in other frequency bands can be reduced, and the radio frequency performance of other frequency bands can be improved.
Fig. 5 is a flowchart illustrating an interference suppression method for a communication circuit according to an embodiment of the invention.
The communication circuit includes a first communication link, a second communication link, and a first filter, and the first filter is disposed corresponding to the first communication link, which may be referred to above specifically.
Referring to fig. 5, the interference suppression method of the communication circuit may include:
step S101, determining the working mode of the communication circuit and the working frequency bands of the first communication link and the second communication link in the working mode.
Step S102, switch control information is determined based on the working mode and the working frequency ranges of the first communication link and the second communication link in the working mode.
And step S103, controlling whether the first filter is accessed to the first communication link or not according to the switch control information.
According to an embodiment of the present invention, determining the switch control information based on the operating mode and the operating frequency bands of the first communication link and the second communication link in the operating mode includes: and determining that the working mode is a non-5G frequency band mode, wherein the switch control information is first switch control information to indicate that the first filter is not accessed to the first communication link.
According to an embodiment of the present invention, determining the switch control information based on the operating mode and the operating frequency bands of the first communication link and the second communication link in the operating mode includes: determining that the working mode is a dual-card mode or a non-5G frequency band mode, the harmonic signal of the working frequency band of the first communication link falls into the working frequency band of the second communication link, and the switch control information is second switch control information to indicate that the first filter is accessed into the first communication link; and determining that the working mode is a dual-card mode or a non-5G frequency band mode, the harmonic signal of the working frequency band of the first communication link does not fall into the working frequency band of the second communication link, and the switch control information is first switch control information to indicate that the first filter is not accessed into the first communication link.
It should be noted that, for the disclosure of the specific details of the interference suppression method of the communication circuit, reference may be made to the foregoing disclosure of the specific details of the communication circuit, which is not described herein again.
According to the interference suppression method for the communication circuit, provided by the embodiment of the invention, the first filter is arranged in the first communication link of the communication circuit, the switch control information is determined based on the working mode of the communication circuit and the working frequency bands of the first communication link and the second communication link in the working mode, and whether the first filter is connected to the first communication link is controlled according to the switch control information, so that when a harmonic signal of the working frequency band of the first communication link falls into the working frequency band of the second communication link, the harmonic signal is filtered by the first filter, the signal interference of the first communication link to the second communication link is reduced, and in other frequency bands, the path loss of the first communication link is reduced by not connecting the first filter, and the radio frequency performance of other frequency bands is improved.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second", and the like used in the embodiments of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated in the embodiments. Thus, a feature of an embodiment of the present invention that is defined by the terms "first," "second," etc. may explicitly or implicitly indicate that at least one of the feature is included in the embodiment. In the description of the present invention, the word "plurality" means at least two or two and more, such as two, three, four, etc., unless specifically limited otherwise in the examples.
In the present invention, unless otherwise explicitly specified or limited in relation to the embodiments, the terms "mounted," "connected," and "fixed" in the embodiments shall be understood in a broad sense, for example, the connection may be a fixed connection, a detachable connection, or an integrated body, and may be understood as a mechanical connection, an electrical connection, etc.; of course, they may be directly connected or indirectly connected through intervening media, or they may be interconnected within one another or in an interactive relationship. Those of ordinary skill in the art will understand the specific meaning of the above terms in the present invention according to their specific implementation.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (13)
1. A communication circuit, comprising:
a first communication link comprising a first antenna;
a second communication link comprising a second antenna;
a first filter, the first filter being arranged in correspondence with the first communication link;
the selection unit is configured to select the first filter to filter the harmonic signal when the harmonic signal of the working frequency band of the first communication link falls into the working frequency band of the second communication link, so as to reduce the signal coupling of the first antenna to the second antenna.
2. The communication circuit according to claim 1, wherein the first communication link further includes a first power amplifier, a first selection switch unit, at least one first duplexer, and a second selection switch unit, an input terminal of the first power amplifier is connected to a first transmitting terminal of a transceiver, the first power amplifier, the first selection switch unit, the at least one first duplexer, and the second selection switch unit are sequentially connected and then connected to the first antenna, and wherein the selection unit configures a connection relationship between the first filter and the first selection switch unit so that the first filter is connected between the first power amplifier and the at least one first duplexer.
3. The communication circuit according to claim 1, wherein the first communication link further includes a first power amplifier, a first selection switch unit, at least one first duplexer, and a second selection switch unit, an input terminal of the first power amplifier is connected to a first transmitting terminal of a transceiver, the first power amplifier, the first selection switch unit, the at least one first duplexer, and the second selection switch unit are sequentially connected and then connected to the first antenna, and wherein the selection unit configures a connection relationship between the first filter and the second selection switch unit so that the first filter is connected between the at least one first duplexer and the first antenna.
4. A communication circuit according to claim 2 or 3, wherein the first communication link further comprises a third switch selection unit and a first low noise amplifier, the third switch selection unit being connected to at least one of the first duplexer and the first low noise amplifier, respectively, and an output of the first low noise amplifier being connected to a first receiving end of the transceiver.
5. The communication circuit according to claim 2 or 3, wherein the second communication link further includes a second power amplifier, a fourth selection switch unit, and a second filter, an input end of the second power amplifier is connected to the second transmitting end of the transceiver, and the second power amplifier, the fourth selection switch unit, and the second filter are connected in sequence and then connected to the second antenna.
6. The communication circuit of claim 5, wherein the second communication link further comprises a second low noise amplifier, an input of the second low noise amplifier is connected to the fourth selection switch unit, and an output of the second low noise amplifier is connected to the second receiving terminal of the transceiver.
7. The communication circuit of claim 1, wherein the first communication link is configured as an LTE circuit and the second communication link is configured as an NR circuit.
8. The communication circuit of claim 1, wherein the communication circuit operates in a dual card mode, a non-standalone networking mode, and a non-5G band mode.
9. The communication circuit according to claim 8, wherein the selection unit comprises a memory, and the memory stores switch control information corresponding to each mode, wherein when the communication circuit operates in the dual card mode or the non-independent networking mode, the memory is configured to read the corresponding switch control information when determining that a harmonic signal of the operating frequency band of the first communication link falls into the operating frequency band of the second communication link, so as to select the first filter to filter the harmonic signal.
10. A terminal device, characterized in that it comprises a communication circuit according to any one of claims 1-9.
11. An interference suppression method for a communication circuit, the communication circuit including a first communication link, a second communication link, and a first filter, the first filter being disposed in correspondence with the first communication link, the method comprising:
determining an operating mode of the communication circuit and operating frequency bands of the first communication link and the second communication link in the operating mode;
determining switch control information based on the working mode and working frequency bands of the first communication link and the second communication link in the working mode;
and controlling whether the first filter is accessed to the first communication link or not according to the switch control information.
12. The method of claim 11, wherein determining switch control information based on the operating mode and operating frequency bands of the first communication link and the second communication link in the operating mode comprises:
and determining that the working mode is a non-5G frequency band mode, wherein the switch control information is first switch control information to indicate that the first filter does not access the first communication link.
13. The method of claim 11, wherein determining switch control information based on the operating mode and operating frequency bands of the first communication link and the second communication link in the operating mode comprises:
determining that the working mode is a dual-card mode or a non-5G frequency band mode, and a harmonic signal of the working frequency band of the first communication link falls into the working frequency band of the second communication link, wherein the switch control information is second switch control information to indicate that the first filter is accessed to the first communication link;
and determining that the working mode is a dual-card mode or a non-5G frequency band mode, and the harmonic signal of the working frequency band of the first communication link does not fall into the working frequency band of the second communication link, wherein the switch control information is first switch control information to indicate that the first filter does not access the first communication link.
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| CN202210470083.5A CN114844522A (en) | 2022-04-28 | 2022-04-28 | Communication circuit, interference suppression method thereof and terminal equipment |
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| CN202210470083.5A CN114844522A (en) | 2022-04-28 | 2022-04-28 | Communication circuit, interference suppression method thereof and terminal equipment |
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| CN105721002A (en) * | 2016-04-15 | 2016-06-29 | 努比亚技术有限公司 | Terminal filtering method, system and device and filtering terminal |
| CN110138411A (en) * | 2019-05-31 | 2019-08-16 | 维沃移动通信有限公司 | Radio circuit, signal processing method, device and terminal |
| CN112152649A (en) * | 2020-09-16 | 2020-12-29 | Oppo广东移动通信有限公司 | Radio frequency circuit, terminal device, signal transmission method, and storage medium |
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| CN105721002A (en) * | 2016-04-15 | 2016-06-29 | 努比亚技术有限公司 | Terminal filtering method, system and device and filtering terminal |
| CN110138411A (en) * | 2019-05-31 | 2019-08-16 | 维沃移动通信有限公司 | Radio circuit, signal processing method, device and terminal |
| CN112152649A (en) * | 2020-09-16 | 2020-12-29 | Oppo广东移动通信有限公司 | Radio frequency circuit, terminal device, signal transmission method, and storage medium |
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