CN106411336B - Terminal and its interference cancellation circuit, interference elimination method - Google Patents
Terminal and its interference cancellation circuit, interference elimination method Download PDFInfo
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- CN106411336B CN106411336B CN201610860045.5A CN201610860045A CN106411336B CN 106411336 B CN106411336 B CN 106411336B CN 201610860045 A CN201610860045 A CN 201610860045A CN 106411336 B CN106411336 B CN 106411336B
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- signal
- main collection
- interference
- terminal
- diversity reception
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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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
Abstract
This disclosure relates to a kind of terminal and its interference cancellation circuit, interference elimination method.The interference cancellation circuit is applied to terminal, the terminal includes main collection receiving path and diversity reception access, the interference cancellation circuit includes signal synthesis unit and Signal averaging unit, wherein, the signal synthesis unit is used to after compensating processing to the first path signal and/or alternate path signal synthesize, and generates composite signal；The Signal averaging unit is used to carry out interference-cancellation process to the composite signal to obtain interference-cancelled signals, and feed back to the main collection receiving path and/or diversity reception access, offset the interference-cancelled signals with the main collection reception signal and/or diversity reception signal, to eliminate interference present in the main collection receiving path and/or diversity reception access.The interference in terminal can be effectively eliminated using the disclosure, to solve the problems, such as EMC more serious present in terminal.
Description
Technical field
This disclosure relates to which mobile communication technology field more particularly to a kind of terminal and its interference cancellation circuit, interference are eliminated
Method.
Background technique
With the gradually development of mobile communication technology, the function of integrating in terminal (such as smart phone) is more and more,
And the frequency range supported is more and more, so that the circuit structure of terminal inner also becomes increasingly complex.However, the space of terminal complete machine is
Limited, when this results in the work of terminal complete machine, the electromagnetic environment around main diversity antenna is increasingly complicated, if can not be effectively
The interference in terminal is eliminated, will lead to terminal has more serious EMC (Electro Magnetic Compatibility), for example, terminal is certain
Antenna sensitivity sharply deteriorates when frequency range, and influences user experience.
Currently, manufacturer terminal to terminal carry out interference elimination method there are mainly three types of: the first, detecting interference
After source, interference source is shielded as far as possible by shielding measure, to reduce interference of the interference source to disturbed object；Second,
Interference path is cut off, interference caused by terminal itself can not be suitable for, for example, harmonic wave caused by the Touch Screen of terminal is dry
It disturbs；The third, is protected disturbed object by quarantine measures, to reduce interference suffered by disturbed object.
But the above method or there are still least a portion of interference leakages, and it is undesirable to cause interference with eradicating efficacy,
The scope of application is not wide, and not can guarantee the consistency of radio performance of terminal index.Therefore, how to effectively eliminate in terminal
Interference is still manufacturer terminal urgent problem to be solved now.
Summary of the invention
Based on this, one of the disclosure is designed to provide a kind of terminal and its interference cancellation circuit, existing for solving
It is not possible to effectively eliminate the problem of interfering in terminal in technology.
In addition, another object of the present disclosure is to provide a kind of interference elimination method, for solving in the prior art still
The problem of interfering in terminal can not be effectively eliminated.
In order to solve the above-mentioned technical problem, technical solution used by the disclosure are as follows:
A kind of interference cancellation circuit is applied to terminal, and the terminal includes main collection receiving path and diversity reception access, institute
Stating interference cancellation circuit includes signal synthesis unit and Signal averaging unit, wherein the signal synthesis unit is used for first
Path signal and/or alternate path signal synthesize after compensating processing, generate composite signal, first path signal is logical
It crosses and acquires what the main collection reception signal that the main collection receiving path is transmitted obtained, the alternate path signal is by described in acquisition
What the diversity reception signal of diversity reception tunnel obtained；The Signal averaging unit is for doing the composite signal
It disturbs counteracting to handle to obtain interference-cancelled signals, and feeds back to the main collection receiving path and/or diversity reception access, make described dry
It disturbs offseting signal to be offset with the main collection reception signal and/or diversity reception signal, to eliminate the main collection receiving path
And/or it is interfered present in diversity reception access.
A kind of terminal, including main collection receiving path and diversity reception access, wherein the terminal further includes as described above
Interference Cancellation circuit, the Interference Cancellation are electrically connected between the main collection receiving path and diversity reception access.
A kind of interference elimination method is applied to terminal, and the terminal includes main collection receiving path and diversity reception access,
In, which comprises it is synthesized after compensating processing to the first path signal and/or alternate path signal, generates synthesis letter
Number, first path signal is to receive signal by acquiring the main collection of the main collection receiving path transmission to obtain, described the
Two path signals are obtained by acquiring the diversity reception signal of the diversity reception tunnel；To the composite signal into
Row interference-cancellation process obtains interference-cancelled signals；By the interference-cancelled signals feed back to the main collection receiving path and/or
Diversity reception access offsets the interference-cancelled signals with the main collection reception signal and/or diversity reception signal, with
Eliminate interference present in the main collection receiving path and/or diversity reception access.
Compared with prior art, the disclosure has the advantages that
The disclosure has abandoned the mode to the used shielding of interference in terminal or isolation in the prior art, and innovative
Ground is by the way of signal cancellation, by the way that Interference Cancellation is arranged between the main collection receiving path and diversity reception access of terminal
Circuit is acquired using the signal that Interference Cancellation circuit transmits main collection receiving path and diversity reception access, and handled
Interference-cancelled signals are obtained, then feed back to main collection receiving path and diversity reception access is offset, to effectively eliminate eventually
Interference in end solves the problems, such as EMC more serious present in terminal, and the user experience is improved.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The disclosure can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the disclosure
Example, and consistent with the instructions for explaining the principles of this disclosure.
Fig. 1 is a kind of block diagram of interference cancellation circuit shown according to an exemplary embodiment；
Fig. 2 be in Fig. 1 corresponding embodiment signal synthesis unit in the block diagram of one embodiment；
Fig. 3 be in Fig. 2 corresponding embodiment acquisition module in the block diagram of one embodiment；
Fig. 4 be in Fig. 1 corresponding embodiment Signal averaging unit in the block diagram of one embodiment；
Fig. 5 is the block diagram of another interference cancellation circuit shown according to an exemplary embodiment；
Fig. 6 a is a kind of circuit diagram of interference cancellation circuit in an application scenarios；
Fig. 6 b is the circuit diagram of another interference cancellation circuit in an application scenarios；
Fig. 7 is a kind of flow chart of interference elimination method shown according to an exemplary embodiment；
Fig. 8 is a kind of hardware block diagram of terminal shown according to an exemplary embodiment.
Through the above attached drawings, it has been shown that the specific embodiment of the disclosure will be hereinafter described in more detail, these attached drawings
It is not intended to limit the scope of this disclosure concept by any means with verbal description, but is by referring to specific embodiments
Those skilled in the art illustrate the concept of the disclosure.
Specific embodiment
Here will the description is performed on the exemplary embodiment in detail, the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all implementations consistent with this disclosure.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects be described in detail in claims, the disclosure.
Referring to Fig. 1, in one exemplary embodiment, a kind of interference cancellation circuit 100 is applied to terminal 10, and terminal 10 is wrapped
Include interference cancellation circuit 100, main collection receiving path 200, diversity reception access 300 and baseband processing unit 400.
Wherein, main collection receiving path 200 includes main collection antenna and its match circuit, which may include filtering
Device, amplifier, frequency converter etc..Main collection receiving path 200 is used to receive radiofrequency signal by main collection antenna, and makes radiofrequency signal
Baseband processing unit 400 is transmitted to through corresponding match circuit.
Diversity reception access 300 includes diversity antenna and its match circuit, which may include filter, amplification
Device, frequency converter etc..Diversity reception access 300 is used to receive radiofrequency signal by diversity antenna, and makes radiofrequency signal through correspondence
Match circuit be transmitted to baseband processing unit 400.
Baseband processing unit 400 is used for the radiofrequency signal (including main collection receives signal and diversity reception signal) received
It amplifies and demodulates.
Since main collection antenna and diversity antenna may be interfered the interference in source, in main collection reception signal in addition to
Include useful radiofrequency signal, it is also possible to comprising useless and harmful radiofrequency signal, that is, interfere；Similarly, in diversity reception signal
In addition to including useful radiofrequency signal, it is also possible to comprising useless and harmful radiofrequency signal, that is, interfere.
In order to eliminate above-mentioned interference present in terminal 10, for example, what is persistently generated when the work of baseband processing unit 400 is dry
It disturbs.Interference cancellation circuit 100 includes signal synthesis unit 110 and Signal averaging unit 130.
Specifically, signal synthesis unit 110 is for compensating processing to the first path signal and/or alternate path signal
After synthesize, generate composite signal.
First path signal is obtained by acquiring the main collection reception signal that main collection receiving path 200 is transmitted, and second is logical
Road signal is that the diversity reception signal transmitted by acquisition diversity reception access 300 obtains.
It, can be to the first path signal and/or second after collecting the first path signal and alternate path signal
Path signal compensates, to guarantee the signal strength phase of compensated treated the first path signal and alternate path signal
When.
Further, when the radiofrequency signal received is weak signal, to the first path signal and/or alternate path signal
It compensates.For example, receiving sensitivity threshold value is set as -90dBm, it, should when the signal strength of radiofrequency signal is lower than -90dBm
Radiofrequency signal is considered as weak signal.
That is, if it is main collection receiving path 200 transmit main collection receive signal signal strength do not meet receive it is sensitive
When spending threshold value, then the first path signal is compensated.Similarly, if the diversity reception signal that diversity reception access 300 transmits
When signal strength does not meet receiving sensitivity threshold value, then alternate path signal is compensated.
Further, compensation, which can be, carries out several multiples to the first path signal and/or alternate path signal and puts
Greatly, it can also be that carrying out several numerical value to the first path signal and/or alternate path signal adds up.
It, can be to first after compensation deals after completing to the first path signal and/or alternate path signal compensation
Path signal and alternate path signal are synthesized.Further, synthesis can be and directly be added the former with the latter, can also be with
It is to be added the reverse signal of the former with the latter, can also be and directly subtract each other the former with the latter.
Signal averaging unit 130 is used to carry out interference-cancellation process to composite signal to obtain interference-cancelled signals, and feeds back
To main collection receiving path 200 and/or diversity reception access 300, connect interference-cancelled signals with main collection reception signal and/or diversity
The collection of letters number is offset, to eliminate interference present in main collection receiving path 200 and/or diversity reception access 300.
After signal synthesis unit 110 generates composite signal, the composite signal is can be obtained simultaneously in Signal averaging unit 130
Interference-cancellation process is carried out to it.Further, interference-cancellation process refers to keeping the signal of the interference-cancelled signals generated strong
Degree is suitable with the signal strength of useless present in terminal and harmful radiofrequency signal, so that interference-cancelled signals and main collection
It receives the useless and harmful radiofrequency signal for including in signal and/or diversity reception signal to be offset, reaches and effectively eliminate end
The purpose interfered in end 10.
Further, counteracting can carry out simultaneously in main collection receiving path 200 and diversity reception access 300, can also
To be only to be carried out in a wherein access.For example, if interference source can be considered as diversity antenna not close to main collection antenna
Be interfered the interference in source, to only need to receive the main collection transmitted in interference-cancelled signals and main collection receiving path 200 to believe
It number is offset, to eliminate interference present in main collection receiving path 200.
By being arranged as described above, the interference effectively eliminated in terminal is realized, so that the solution in baseband processing unit
It adjusts the sensitivity of signal to be optimal, to solve the problems, such as EMC more serious present in terminal, use is effectively promoted
Family experience.
Referring to Fig. 2, in one exemplary embodiment, signal synthesis unit 110 amplifies including acquisition module 111, first
Module 113 and the first addition module 115.
Wherein, acquisition module 111 is connect with main collection receiving path 200 and diversity reception access 300 respectively, for acquiring master
The main collection that collection receiving path 200 is transmitted receives signal and obtains the first path signal, and, acquisition diversity reception access 300 transmits
Diversity reception signal obtains alternate path signal.
Further, as shown in figure 3, acquisition module 111 includes the first power splitter 1111 and the second power splitter 1113.It is each
A power splitter includes input terminal, the first output end and second output terminal.
Specifically, the input terminal of the first power splitter 1111 receives main collection and receives signal, divides main collection reception signal to two-way,
In all the way main collection receive signal and exported by the first output end of the first power splitter 1111 to the first addition module 115, another way
Main collection receives signal and is transmitted in main collection receiving path 200 by the second output terminal continuation of the first power splitter 1111.
The input terminal of second power splitter 1113 receives diversity reception signal, divides diversity reception signal to two-way, wherein all the way
Diversity reception signal is exported by the first output end of the second power splitter 1113 to the first amplification module 113, and another way diversity connects
Number second output terminal for passing through the second power splitter 1113 continuation of collecting mail is transmitted in diversity reception access 300.
It is noted that main collection receives signal and diversity reception signal respectively by the first power splitter 1111 and the second function point
Device 1113 divides for two-way, and be reduced to the signal strength of the transmission signal in winner's collection/diversity reception access 200,300 can
The half of the signal strength of branch front signal, i.e. signal intensity attenuation 3dB, but since baseband processing unit 400 is to reception
Before the radiofrequency signal that arrives carries out demodulation process, can also carry out synthesis processing to the radiofrequency signal, therefore, above-mentioned power splitter institute into
Capable reception signal branch can't generate any influence to the demodulation process of subsequent baseband processing unit 400.
First amplification module 113 is connected to acquisition module 111, for amplifying the first path signal and/or alternate path letter
Number.In the present embodiment, the first amplification module 113 is connect with the second power splitter 1113, for amplifying alternate path signal, such as Fig. 3
It is shown.
Further, the first amplification module 113 includes the first amplifier, and the amplification factor of the first amplifier is controlled by terminal
10 baseband processing unit 400.
In the present embodiment, the signal strength that collection receives signal based on the amplification factor K setting of the first amplifier connects with diversity
The ratio of the signal strength of the collection of letters number.
Amplification factor K feeds back to the first amplifier after being calculated by baseband processing unit 400, and then passes through the first amplifier
Alternate path signal is amplified K times, for example, amplifying K times with mutually K times of amplification or reverse phase, guarantees that amplified second is logical with this
The signal strength of road signal is suitable with the signal strength of the first path signal.Wherein, baseband processing unit 400 can pass through demodulation
Thresholding and path gain subtraction calculations obtain receiving the signal strength of signal, and then are calculated according to the signal strength for receiving signal
To amplification factor K.
First addition module 115 is connected between acquisition module 111 and the first amplification module 113, logical for being added first
Road signal and amplified alternate path signal, obtain composite signal.
In the present embodiment, the first addition module 115 includes adder, and the adder is by the first path signal and amplified
The reverse signal of alternate path signal is added.In other words, the additive process which completes is actually first logical
The subtraction of road signal and amplified alternate path signal, and amplified alternate path signal is reversely then by base band
Processing unit 400 controls the first amplifier and carries out what reverse phase amplification was realized.
Referring to Fig. 4, in one exemplary embodiment, Signal averaging unit 130 includes the second amplification module 131 and second
Addition module 133.
Wherein, the second amplification module 131 is connected between signal synthesis unit 110 and the second addition module 133, for putting
Big composite signal obtains interference-cancelled signals.
Further, the second amplification module 131 includes the second amplifier, and the amplification factor of the second amplifier is controlled by terminal
10 baseband processing unit 400.
As an example it is assumed that generated harmonic wave interference when interference source is the Touch Screen work of terminal, the interference source with
For main the distance between the antenna that integrates as a, the distance between diversity antenna is b, then main collection receives the signal strength expression of signal
For Io1=Ior1+a × Ioc, the signal strength expression of diversity reception signal is Io2=Ior2+b × Ioc.Wherein, Iori(i=
1,2) signal strength of useful radiofrequency signal is indicated, Ioc indicates the signal strength of useless and harmful radiofrequency signal.
In signal synthesis unit 110, the letter for the first path signal that the first output end through the first power splitter exports
Number intensity is expressed as Io1 '=Ior1 '+a × Ioc ', the alternate path letter that the first output end through the second power splitter exports
Number signal strength expression be Io2 '=Ior2 '+b × Ioc '.
After the amplification of the first amplifier, the signal strength expression of amplified alternate path signal is alternate path signal
KIo2 '=K (Ior2 '+b × Ioc ').Wherein, K=Io1 '/Io2 '.
Further, when the signal strength of useless and harmful radiofrequency signal is strong much smaller than the signal of useful radiofrequency signal
When spending, K=Io1 '/Io2 ' ≈ Ior1 '/Ior2 '.Correspondingly, the signal strength of amplified alternate path signal is then expressed as
KIo2 '=Ior1 '+Kb × Ioc '.
Phase is carried out by reverse signal of first addition module to the first path signal and amplified alternate path signal
Add, obtain composite signal, the signal strength expression of the composite signal is Io1 '-KIo2 '=Ior1 '+a × Ioc '-(Ior1 '+Kb
× Ioc ')=(a-Kb) × Ioc '.
Since power splitter is to be divided into the equal two paths of signals of energy for that will receive signal, the of the first power splitter
The signal for the first path signal that the main collection of two output ends output receives the signal strength of signal and its first output end exports is strong
Degree is consistent, is expressed as Io1 '=Ior1 '+a × Ioc '.Similarly, the diversity reception letter of the second output terminal output of the second power splitter
Number signal strength expression be Io2 '=Ior2 '+b × Ioc '.
It is illustrated with Io1 '=Ior1 '+a × Ioc ', it will be understood that a × Ioc ' is corresponding to be useless and harmful penetrate
The signal strength of frequency signal after only being effectively eliminated, can only transmit useful radio frequency letter in main collection receiving path 200
Number, corresponding signal strength is Ior1 '.
Therefore, in the present embodiment, the amplification factor C of the second amplifier is set as C=-a/ (a-Kb), so that synthesis
For signal after the amplification of the second amplifier, the signal strength expression for obtaining interference-cancelled signals is C (a-Kb) × Ioc '=[- a/
(a-Kb)] × (a-Kb) × Ioc '=- a × Ioc ', i.e., just with radiofrequency signal useless and harmful in main collection receiving path 200
Signal strength a × Ioc ' opposite number each other.
Amplification factor C feeds back to the second amplifier after being calculated by baseband processing unit 400, and then passes through the second amplifier
By composite signal amplify C times, with the signal strength of this interference-cancelled signals guaranteed with it is useless in main collection receiving path 200
And the signal strength of harmful radiofrequency signal is suitable, to realize that interferes in main collection receiving path 200 effectively eliminates.
Wherein, baseband processing unit 400 carries out the scanning of different amplification C by the second amplifier of control, to pass through
Amplification factor C is calculated in exhaust algorithm.
Similarly, in diversity reception access 300, the amplification factor C of the second amplifier is set as C=-b/ (a-Kb), remaining mistake
Consistent described in Cheng Yuzhu collection receiving path 200, details are not described herein.
It should be noted that the amplification factor C of second amplifier is corresponding due in main collection/diversity reception access 200,300
Numerical value it is not identical, therefore, two the second amplifiers can be set in the second amplification module 131, be respectively used to main collection receive it is logical
Road 200 and diversity reception access 300 disappear at this point, can carry out simultaneously to the amplification of composite signal to be conducive to improve to interfere
The treatment effeciency removed.
Alternatively, second amplifier can also only be arranged in the second amplification module 131, at this point, the amplification of composite signal
It is that timesharing is completed, i.e. the baseband processing unit 400 of terminal 10, which will control second amplifier or be only used for main collection reception, to be led to
Road 200 or it is only used for diversity reception access 300, the circuit scale of 10 complete machine of terminal is reduced with this, to advantageously reduce end
The hardware power consumption at end 10.For example, baseband processing unit 400 passes through control pin outputs level signals, if detecting level signal
For high level, then it represents that the second amplifier is used for main collection receiving path 200, conversely, level signal is low level if detecting,
Indicate the second amplifier for diversity reception access 300.
Second addition module 133 is connect with main collection receiving path 200 and diversity reception access 300 respectively, for that will interfere
Offseting signal receives signal with main collection respectively and diversity reception signal is added.
Wherein, the second addition module 133 may include two adders.One of adder, which is set to main collection and receives, leads to
Road 200 receives signal for being added interference-cancelled signals and main collection.Another adder is set to diversity reception access 300, uses
In addition interference-cancelled signals and diversity reception signal.At this point, interference-cancelled signals can receive signal simultaneously and be divided with main collection
Collection receives signal and is added, to be conducive to improve the treatment effeciency that interference is eliminated.
Alternatively, the second addition module 133 can also only include an adder, which is controlled by the base band of terminal 10
Processing unit 400 controls adder for interference-cancelled signals by baseband processing unit 400 or exports to main collection receiving path
200 or output to diversity reception access 300.At this point, timesharing is received signal with main collection to interference-cancelled signals or diversity connects
The collection of letters number is added, and the circuit scale of 10 complete machine of terminal is reduced with this, to advantageously reduce the hardware power consumption of terminal 10.For example,
Baseband processing unit 400 is by control pin outputs level signals, if detecting, level signal is high level, then it represents that interference is supported
The signal that disappears is exported to main collection receiving path 200, conversely, level signal is low level if detecting, then it represents that interference-cancelled signals
It exports to diversity reception access 300.
Further, as shown in figure 4, in one exemplary embodiment, Signal averaging unit 130 further includes switch module
135, it is connected between the second amplification module 131 and the second addition module 133.
Wherein, switch module 135 for control interference-cancelled signals whether with main collection reception signal and diversity reception signal
It is added.Switch module 135 is controlled by the baseband processing unit 400 of terminal 10.
In the present embodiment, switch module 135 includes a single-pole double-throw switch (SPDT).Correspondingly, the second addition module 133 includes
Two adders, one of adder are arranged in main collection receiving path 200, and the setting of another adder is logical in diversity reception
In road 300.
When the single-pole double-throw switch (SPDT) is connected between the adder in the second amplification module 131 and main collection receiving path 200
When access, interference-cancelled signals receive signal with main collection and are added, to eliminate interference present in main collection receiving path 200.
When the single-pole double-throw switch (SPDT) is connected between the adder in the second amplification module 131 and diversity reception access 300
When access, interference-cancelled signals are added with diversity reception signal, to eliminate interference present in diversity reception access 300.
Further, the connection of single-pole double-throw switch (SPDT) is controlled by baseband processing unit 400.For example, baseband processing unit 400
By controlling pin outputs level signals, if detecting, level signal is high level, then it represents that single-pole double-throw switch (SPDT) connects second
The access between adder in amplification module 131 and main collection receiving path 200, conversely, level signal is low electricity if detecting
It is flat, then it represents that single-pole double-throw switch (SPDT) is connected logical between the adder in the second amplification module 131 and diversity reception access 300
Road.
Referring to Fig. 5, in one exemplary embodiment, interference cancellation circuit 100 further includes and signal synthesis unit 110
The by-pass unit 150 of input terminal connection.
Wherein, whether by-pass unit 150 carries out interference elimination for controlling terminal 10.By-pass unit 150 is controlled by terminal
10 baseband processing unit 400.
Further, by-pass unit 150 can by with switching characteristic component or circuit form, for example, bypass
Unit 150 can be diode, triode, field effect transistor, relay, single-pole double-throw switch (SPDT) etc..
For example, by-pass unit 150 includes single-pole double-throw switch (SPDT), correspondingly, baseband processing unit 400 is double by control hilted broadsword
Throw switch on and off interference cancellation circuit, realizes whether terminal 10 carries out interference elimination.
Baseband processing unit 400 can control the connection of single-pole double-throw switch (SPDT) by control pin outputs level signals.
If detecting, level signal is high level, then it represents that terminal 10 needs to carry out interference elimination, does at this point, single-pole double-throw switch (SPDT) is connected
Elimination circuit is disturbed, conversely, level signal is low level if detecting, then it represents that terminal 10 does not need to carry out interference elimination, at this point,
Single-pole double-throw switch (SPDT) turns off interference cancellation circuit.
Further, baseband processing unit 400 can be received by demodulation threshold and path gain subtraction calculations
The signal strength of signal, and then calculate to obtain receiving sensitivity according to the signal strength for receiving signal.If receiving sensitivity is normal,
Bypass functionality is then enabled, 150 controlling terminal 10 of by-pass unit stops interference and eliminates, conversely, enabling if receiving sensitivity is abnormal
Interference cancellation circuit 100 carries out interference elimination to terminal 10.
For example, when the Touch Screen work of terminal 10, due to shield bright and screen go out will lead to receiving sensitivity occur compared with
Big difference calculates the bright receiving sensitivity gone out under two states with screen of screen by baseband processing unit 400, if difference satisfaction property
Energy index then enables bypass functionality, and 150 controlling terminal 10 of by-pass unit stops interference and eliminates, conversely, opening if differing greatly
With interference cancellation circuit 100, interference elimination is carried out to terminal 10.
By being arranged as described above, realizes interference cancellation circuit and only just carry out interfering in receiving sensitivity exception disappearing
It removes, significantly reduces the hardware power consumption of terminal.
It should be noted that interference cancellation circuit provided by above-described embodiment carry out interference eliminate when, only with above-mentioned
The division of each functional module carries out for example, in practical applications, can according to need and by above-mentioned function distribution by difference
Functional module complete, i.e., the internal structure of interference cancellation circuit will be divided into different functional modules, to complete above description
All or part of function.
Fig. 6 a to Fig. 6 b is the basic circuit diagram of the interference cancellation circuit in an application scenarios, now in conjunction with Fig. 6 a and Fig. 6 b couple
Interference cancellation circuit is illustrated as follows.
As shown in figures 6 a and 6b, the match circuit of main collection antenna includes receiving prime filter Z1, low-noise amplifier
(LNA) L1, reception rear class filtering device Z2, low-converter Q1 and low-pass filter Z3, Z4.When being eliminated without interference, main collection
The received radiofrequency signal of antenna after each component of its match circuit, will output amplify into baseband processing unit and
Demodulation.
The match circuit of diversity antenna includes receiving prime filter Z5, low-noise amplifier (LNA) L2, receiving rear class filter
Wave device Z6, low-converter Q2 and low-pass filter Z7, Z8.When being eliminated without interference, the received radiofrequency signal of diversity antenna
After each component through its match circuit, output is amplified and demodulated into baseband processing unit.
Interference Cancellation circuit includes signal synthesis unit and Signal averaging unit.Signal synthesis unit include power splitter P1,
Power splitter P2, amplifier M1 and adder A1.Signal averaging unit includes amplifier M2, single-pole double-throw switch (SPDT) S1, adder A2
With adder A3.
Wherein, the input terminal 1 of power splitter P1 and output end 2 are set in main collection receiving path, the input terminal 2 of adder A2
It is set in main collection receiving path with output end 3, similarly, it is logical that the input terminal 1 and output end 2 of power splitter P2 is set to diversity reception
The input terminal 2 and output end 3 of Lu Zhong, adder A3 are set in main collection receiving path.The output of interference-cancelled signals is then by list
Double-pole double throw switch S1 is determined.
Interference Cancellation circuit further includes by-pass unit.Wherein, by-pass unit includes single-pole double-throw switch (SPDT) S2, S3, S4, S5.
When bypass functionality comes into force, single-pole double-throw switch (SPDT) S2, S3 bypass power splitter P1, and single-pole double-throw switch (SPDT) S4, S5 will be by power splitter P2
Road, meanwhile, the input terminal 1 of adder A1, A2 is inputted without signal, so that main collection/diversity reception signal is directly by receiving
Rear class filtering device Z2, Z6 are transmitted to low-converter Q1, Q2.
Following is embodiments of the present disclosure, can be adapted for interference cancellation circuit involved in the disclosure.For this public affairs
Undisclosed details in extraction of root embodiment, please refers to interference cancellation circuit embodiment involved in the disclosure.
Referring to Fig. 7, in one exemplary embodiment, a kind of interference elimination method is applied to terminal 10 shown in FIG. 1, eventually
End 10 includes interference cancellation circuit 100, main collection receiving path 200 and diversity reception access 300.The interference cancellation circuit 100 connects
It connects between main collection receiving path 200 and diversity reception access 300.
Correspondingly, which can be executed by interference cancellation circuit 100, may comprise steps of:
Step 710, it is synthesized after compensating processing to the first path signal and/or alternate path signal, generates synthesis letter
Number.
Wherein, the first path signal is obtained by acquiring the main collection reception signal of main collection receiving path transmission, second
Path signal is obtained by acquiring the diversity reception signal of diversity reception tunnel.
Step 730, interference-cancellation process is carried out to composite signal and obtains interference-cancelled signals.
Step 750, interference-cancelled signals are fed back into main collection receiving path and/or diversity reception access, makes Interference Cancellation
Signal receives signal with main collection and/or diversity reception signal is offset, logical to eliminate main collection receiving path and/or diversity reception
It is interfered present in road.
Referring to Fig. 8, Fig. 8 is a kind of hardware block diagram of terminal suitable for interference elimination method.It needs to illustrate
It is that the terminal 800 is the example for adapting to the disclosure, must not believe that appointing there is provided the use scope to the disclosure
What is limited.The terminal 800 can not be construed to the illustrative terminal 800 shown in Fig. 8 that needs to rely on or must have
In one or more component.
As shown in figure 8, terminal 800 (only shows one including memory 801, storage control 803, one or more in figure
It is a) processor 805, Peripheral Interface 807, radio-frequency module 809, locating module 811, photographing module 813, audio-frequency module 815, touch-control
Screen 817 and key module 819.These components are mutually communicated by one or more communication bus/signal wire 821.
It is appreciated that hardware configuration shown in Fig. 8 is only to illustrate, terminal 800 may also include than shown in Fig. 8 more or more
Few component, or with the component different from shown in Fig. 8.Each component shown in fig. 8 can using hardware, software or its
Combination is to realize.
Wherein, memory 801 can be used for storing software program and module, such as the interference in disclosure exemplary embodiment
The corresponding program instruction of removing method and module, the program instruction that processor 805 is stored in memory 801 by operation, from
And perform various functions and data processing, that is, realize above-mentioned interference elimination method.
The carrier that memory 801 is stored as resource can be random storage medium, such as high speed random access memory, non-
Volatile memory, such as one or more magnetic storage devices, flash memory or other solid-state memories.Storage mode can be
Of short duration storage permanently stores.
Peripheral Interface 807 may include an at least wired or wireless network interface, at least one series-parallel translation interface, at least
One input/output interface and at least USB interface etc., for coupleeing memory for external various input/output devices
801 and processor 805, to realize the communication with external various input/output devices.
Radio-frequency module 809 is used for transceiving electromagnetic wave, the mutual conversion of electromagnetic wave and electric signal is realized, to pass through communication network
Network is communicated with other equipment.Communication network includes cellular telephone networks, WLAN or Metropolitan Area Network (MAN), above-mentioned communication network
Various communication standards, agreement and technology can be used in network.
Locating module 811 is used to obtain the geographical location of terminal 800 being currently located.The example of locating module 811 includes
But it is not limited to GPS (GPS), the location technology based on WLAN or mobile radio communication.
Photographing module 813 is under the jurisdiction of camera, for shooting picture or video.The picture or video of shooting can be deposited
In storage to memory 801, host computer can also be sent to by radio-frequency module 809.
Audio-frequency module 815 provides a user audio interface, may include one or more microphone interfaces, one or more
Speaker interface and one or more earphone interfaces.The interaction of audio data is carried out by audio interface and other equipment.Sound
Frequency can also be sent according to can store to memory 801 by radio-frequency module 809.
Touch Screen 817 provides an I/O Interface between terminal 800 and user.Specifically, user can pass through
Touch Screen 817 carries out the gesture operations such as input operation, such as click, touch, sliding, so that electronic equipment operates the input
It is responded.Any one form of text, picture or video or combination are then formed by output content and passed through by terminal 800
Touch Screen 817 shows to user and exports.
Key module 819 includes at least one key, to provide user's interface inputted to terminal 800, user
Terminal 800 can be made to execute different functions by pressing different keys.For example, sound regulating key is for user's realization pair
The adjusting for the wave volume that terminal 800 plays.
It should be noted that interference elimination method provided by above-described embodiment and interference cancellation circuit embodiment belong to together
One design, wherein the specific executive mode of each step is described in detail in interference cancellation circuit embodiment, this
Place repeats no more.
Above content, only the preferable examples embodiment of the disclosure, the embodiment for being not intended to limit the disclosure, this
Field those of ordinary skill can very easily carry out corresponding flexible or repair according to the central scope and spirit of the disclosure
Change, therefore the protection scope of the disclosure should be subject to protection scope required by claims.
Claims (10)
1. a kind of interference cancellation circuit, is applied to terminal, the terminal includes main collection receiving path and diversity reception access, spy
Sign is that the interference cancellation circuit includes signal synthesis unit and Signal averaging unit, wherein
The signal synthesis unit is used to after compensating processing to the first path signal and/or alternate path signal synthesize, raw
At composite signal, first path signal is obtained by acquiring the main collection reception signal of the main collection receiving path transmission
, the alternate path signal is obtained by acquiring the diversity reception signal of the diversity reception tunnel, the benefit
Processing is repaid so that first path signal and the signal strength of the alternate path signal are suitable；
The Signal averaging unit feeds back to the master for amplifying to obtain interference-cancelled signals to the composite signal
Collect receiving path and/or diversity reception access, the interference-cancelled signals and the main collection is made to receive signal and/or diversity reception
Signal is offset, to eliminate interference present in the main collection receiving path and/or diversity reception access.
2. circuit as described in claim 1, which is characterized in that the signal synthesis unit includes acquisition module, the first amplification
Module and the first addition module, wherein
The acquisition module is connect with the main collection receiving path and diversity reception access respectively, is received for acquiring the main collection
The main collection of tunnel receives signal and obtains first path signal, and, acquire the diversity of the diversity reception tunnel
It receives signal and obtains the alternate path signal；
First amplification module is connected to the acquisition module, for amplifying the alternate path signal；
First addition module is connected between the acquisition module and the first amplification module, for being added first access
Signal and amplified alternate path signal, obtain the composite signal.
3. circuit as claimed in claim 2, which is characterized in that the acquisition module includes the first power splitter and the second function point
Device, each power splitter include input terminal, the first output end and second output terminal, wherein
The input terminal of first power splitter receives the main collection and receives signal, and the main collection is received signal and divides two-way, wherein all the way
Main collection receives signal and is exported by the first output end of the first power splitter to first addition module, and the main collection of another way receives letter
It number is transmitted in the main collection receiving path by the continuation of the second output terminal of the first power splitter；
The input terminal of second power splitter receives the diversity reception signal, divides the diversity reception signal to two-way, wherein all the way
Diversity reception signal is exported by the first output end of the second power splitter to first amplification module, another way diversity reception letter
It number is transmitted in the diversity reception access by the continuation of the second output terminal of the second power splitter.
4. circuit as claimed in claim 2, which is characterized in that first amplification module includes the first amplifier, and described the
The amplification factor of one amplifier is controlled by the baseband processing unit of the terminal.
5. circuit as described in claim 1, which is characterized in that the Signal averaging unit includes the second amplification module and second
Addition module, wherein
Second amplification module is connected between the signal synthesis unit and the second addition module, for amplifying the synthesis
Signal obtains the interference-cancelled signals；
Second addition module is connect with the main collection receiving path and diversity reception access respectively, for supporting the interference
The signal that disappears receives signal with main collection respectively and diversity reception signal is added.
6. circuit as claimed in claim 5, which is characterized in that the Signal averaging unit further includes switch module, is connected to
Between second amplification module and the second addition module, for control the interference-cancelled signals whether respectively with the main collection
It receives signal to be added with diversity reception signal, the switch module is controlled by the baseband processing unit of the terminal.
7. circuit as claimed in claim 5, which is characterized in that second amplification module includes the second amplifier, and described the
The amplification factor of two amplifiers is controlled by the baseband processing unit of the terminal.
8. circuit described in claim 1, which is characterized in that the interference cancellation circuit further includes and the signal synthesis unit
Input terminal connection by-pass unit, for controlling whether the terminal carries out interference elimination, the by-pass unit is controlled by institute
State the baseband processing unit of terminal.
9. a kind of terminal, including main collection receiving path and diversity reception access, which is characterized in that the terminal further includes such as right
It is required that 1 to 8 described in any item Interference Cancellation circuits, the Interference Cancellation is electrically connected to the main collection receiving path and diversity
Between receiving path.
10. a kind of interference elimination method, it is applied to terminal, the terminal includes main collection receiving path and diversity reception access,
It is characterized in that, which comprises
It is synthesized after compensating processing to the first path signal and/or alternate path signal, generates composite signal, described first is logical
Road signal is obtained by acquiring the main collection reception signal of the main collection receiving path transmission, and the alternate path signal is logical
It crosses and acquires what the diversity reception signal of the diversity reception tunnel obtained, the compensation deals believe first access
It is number suitable with the signal strength of the alternate path signal；
The composite signal is amplified to obtain interference-cancelled signals；
The interference-cancelled signals are fed back into the main collection receiving path and/or diversity reception access, make the Interference Cancellation
Signal receives signal with the main collection and/or diversity reception signal is offset, to eliminate the main collection receiving path and/or divide
Collect and is interfered present in receiving path.
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| CN201610860045.5A CN106411336B (en) | 2016-09-28 | 2016-09-28 | Terminal and its interference cancellation circuit, interference elimination method |
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| CN201610860045.5A CN106411336B (en) | 2016-09-28 | 2016-09-28 | Terminal and its interference cancellation circuit, interference elimination method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107734607B (en) * | 2017-08-24 | 2020-12-11 | 深圳市盛路物联通讯技术有限公司 | Method for adjusting working frequency band of application antenna and mobile terminal |
| CN109428613B (en) * | 2017-08-25 | 2021-10-15 | 西安中兴新软件有限责任公司 | Interference processing method, device and circuit |
| CN107645733B (en) * | 2017-10-31 | 2021-06-04 | 北京小米移动软件有限公司 | Communication method, communication apparatus, and storage medium |
| CN109104214B (en) * | 2018-07-25 | 2020-07-28 | 维沃移动通信有限公司 | Signal processing device, electronic equipment and signal processing method |
| CN109709580A (en) * | 2018-12-13 | 2019-05-03 | 航天恒星科技有限公司 | A kind of satellite relay data-link receiver jamproof system |
| CN109510637A (en) * | 2018-12-25 | 2019-03-22 | 普联技术有限公司 | A kind of means for anti-jamming orienting AP |
| CN113438035B (en) * | 2021-08-26 | 2021-12-31 | 中国人民解放军海军工程大学 | Interference protector for ultrashort wave radio station |
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| CN106411336A (en) | 2017-02-15 |
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Address after: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee after: Qingdao Hisense Mobile Communication Technology Co.,Ltd. Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee before: HISENSE MOBILE COMMUNICATIONS TECHNOLOGY Co.,Ltd. |