CN111525941A - Signal processing circuit and method and electronic equipment - Google Patents
Signal processing circuit and method and electronic equipment Download PDFInfo
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- CN111525941A CN111525941A CN202010349205.6A CN202010349205A CN111525941A CN 111525941 A CN111525941 A CN 111525941A CN 202010349205 A CN202010349205 A CN 202010349205A CN 111525941 A CN111525941 A CN 111525941A
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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
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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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
Abstract
The embodiment of the invention provides a signal processing circuit, a method and electronic equipment, wherein the signal processing circuit comprises: the radio frequency chip, the power amplifier, the filter and the tuning assembly; the first end of the radio frequency chip is connected with the first end of the power amplifier, the second end of the power amplifier is connected with the first end of the tuning component, the second end of the tuning component is connected with the first end of the filter, and the second end of the filter is used for being connected with the radio frequency antenna; the third end of the tuning component is connected with the control end of the radio frequency chip, the tuning component comprises N working states, the impedance values of the tuning component in different working states are different, and N is more than or equal to 2; and under the condition that the frequency of the radio-frequency signal generated by the radio-frequency chip is within the target bandwidth range, the radio-frequency chip controls the tuning component to work in a target working state associated with the target bandwidth range. The embodiment of the invention can improve the consistency of the signal processing circuit for transmitting the radio frequency signal and reduce the debugging complexity of the signal processing circuit.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a signal processing circuit, a signal processing method, and an electronic device.
Background
With the development of the times, the requirements of users on the communication rate, the network coverage, the connection capacity, the network delay and the like of the mobile communication network are higher and higher, so that new mobile communication technologies appear, for example: fifth Generation mobile communication technology (5th-Generation, 5G).
The frequency band of radio frequency signals in new mobile communication technologies is becoming wider and wider, for example: the 5G network frequency band may be divided into a millimeter wave communication frequency band and a communication frequency band below 6GHz (sub6G), and the sub6G may be specifically divided into: the antenna comprises an n77 frequency band, an n78 frequency band and an n79 frequency band, wherein the frequency band of the n77 frequency band is 3.3GHz-4.2GHz, the frequency band of the n78 frequency band is 3.3GHz-3.8GHz, and the frequency band of the n79 frequency band is 4.4GHz-5.0 GHz. As can be seen from the above, the bandwidth in the 5G network is at least 500MHz, and when the above-mentioned signal transmission in the wider frequency band is performed through the radio frequency architecture in the related art, the load difference of the Power Amplifier (PA) is large due to the discrete characteristic of the high frequency load, for example: when a 3.3GHz radio frequency signal is transmitted, a PA load in the radio frequency architecture is inconsistent with a PA load in the radio frequency architecture when the 3.8GHz radio frequency signal is transmitted, so that a large difference exists between the 3.3GHz radio frequency signal and the 3.8GHz radio frequency signal transmitted by the radio frequency architecture.
Therefore, when the same radio frequency architecture is used for transmitting the sub6G radio frequency signal with a wider frequency band, the problem that performance parameters such as power consumption and current value of the transmitted radio frequency signal are inconsistent is caused, so that the power consumption of the radio frequency architecture is difficult to control, and the complexity of debugging the radio frequency architecture is increased.
Disclosure of Invention
Embodiments of the present invention provide a signal processing circuit, a signal processing method, and an electronic device, so as to solve the problems that power consumption is difficult to control and complexity of debugging a radio frequency architecture is increased when a radio frequency architecture in the related art transmits a radio frequency signal in a wider frequency band.
In order to solve the above technical problem, the embodiment of the present invention is implemented as follows:
in a first aspect, an embodiment of the present invention provides a signal processing circuit, including: the radio frequency chip, the power amplifier, the filter and the tuning assembly;
the first end of the radio frequency chip is connected with the first end of the power amplifier, the second end of the power amplifier is connected with the first end of the tuning component, the second end of the tuning component is connected with the first end of the filter, and the second end of the filter is used for being connected with a radio frequency antenna; the third end of the tuning component is connected with the control end of the radio frequency chip, the tuning component comprises N working states, the impedance values of the tuning component are different under different working states, and N is more than or equal to 2;
and under the condition that the frequency of a radio-frequency signal generated by the radio-frequency chip is within a target bandwidth range, the radio-frequency chip controls the tuning component to work in a target working state associated with the target bandwidth range.
In a second aspect, an embodiment of the present invention further provides a mobile electronic device, including the signal processing circuit and a radio frequency antenna provided in the first aspect of the embodiment of the present invention, where the radio frequency antenna is connected to a second end of a filter in the signal processing circuit.
In a third aspect, an embodiment of the present invention further provides a signal processing method, which is applied to the electronic device provided in the second aspect of the embodiment of the present invention, and the method includes:
under the condition that the bandwidth of the working frequency band of the radio frequency chip is larger than a preset bandwidth, dividing the bandwidth of the working frequency band into N bandwidth ranges, wherein N is more than or equal to 2;
determining a target working state associated with a target bandwidth range under the condition that the frequency of a radio-frequency signal generated by the radio-frequency chip is within the target bandwidth range, wherein a tuning component working in the target working state can adjust the radio-frequency impedance of the radio-frequency signal to be within a preset impedance range, and the target bandwidth range is one of the N bandwidth ranges;
and controlling the tuning assembly to work in the target working state.
In a fourth aspect, an embodiment of the present invention further provides an electronic device, including: the signal processing method comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the computer program to realize the steps in the signal processing method provided by the embodiment of the invention.
In a fifth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the steps in the signal processing method provided in the embodiment of the present invention or implements the steps in the network configuration method provided in the embodiment of the present invention.
The signal processing circuit provided in the embodiment of the present invention includes: the radio frequency chip, the power amplifier, the filter and the tuning assembly; the first end of the radio frequency chip is connected with the first end of the power amplifier, the second end of the power amplifier is connected with the first end of the tuning component, the second end of the tuning component is connected with the first end of the filter, and the second end of the filter is used for being connected with a radio frequency antenna; the third end of the tuning component is connected with the control end of the radio frequency chip, the tuning component comprises N working states, the impedance values of the tuning component are different under different working states, and N is more than or equal to 2; and under the condition that the frequency of a radio-frequency signal generated by the radio-frequency chip is within a target bandwidth range, the radio-frequency chip controls the tuning component to work in a target working state associated with the target bandwidth range. When the frequency of the radio frequency signal generated by the radio frequency chip is in different bandwidth ranges, the tuning component is enabled to work in a working state associated with the bandwidth ranges, so that the impedance value of the tuning component can be matched with the bandwidth ranges, the load of the power amplifier is kept stable, the power consumption generated when the signal processing circuit transmits the transmission signals with different frequencies is consistent, and the debugging complexity of the signal processing circuit is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a block diagram of a signal processing circuit according to an embodiment of the present invention;
FIG. 2 is a block diagram of another signal processing circuit provided by an embodiment of the present invention;
fig. 3 is one of application scenarios of a signal processing circuit provided in an embodiment of the present invention;
fig. 4 is a second application scenario diagram of the signal processing circuit according to the embodiment of the present invention;
fig. 5 is a third application scenario diagram of a signal processing circuit according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating an application scenario of the signal processing circuit according to the embodiment of the present invention;
fig. 7 is a flowchart of a signal processing method according to an embodiment of the present invention;
fig. 8 is a block diagram of an electronic device provided in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
With the development of communication technology, the bandwidth of a radio frequency signal has a development trend of being wider and wider, and when the radio frequency signal is transmitted through a radio frequency architecture in a Time Division Duplex (TDD) mode or the like, because the frequency difference of different radio frequency signals is large, the parasitic effect of a high-frequency interconnection line is aggravated, the difference between the low frequency and the high frequency of a load of a power amplifier is large, the convergence of the load of the power amplifier is poor, and the linearity of a signal processing circuit is damaged or the current value of the transmitted signal is unstable.
The signal processing circuit provided by the embodiment of the invention is applied to a radio frequency architecture of TDD, and can change the impedance value of the tuning component, so that when the power amplifier processes radio frequency signals with different frequencies, the load impedance of the power amplifier can be adjusted through the tuning component, and the power consumption, the current and the like of the signal processing circuit have consistency, so that the consistency of a transmitting signal of the signal processing circuit is improved, and the network side equipment can demodulate according to a preset demodulation rule when acquiring the transmitting signal.
It should be noted that the signal processing circuit provided in the embodiment of the present invention may be applied to a Stand-Alone networking (SA) architecture or a Non-Stand-Alone Networking (NSA) architecture, or may also be applied to a new networking architecture that may appear in the future, and is not limited in particular herein.
Referring to fig. 1, fig. 1 is a structural diagram of a signal processing circuit according to an embodiment of the present invention, where the signal processing circuit can be applied to an electronic device. As shown in fig. 1, the signal processing circuit 100 includes: radio frequency chip 1, power amplifier 2, filter 3 and tuning subassembly 4. The first end of the radio frequency chip 1 is connected with the first end of the power amplifier 2, the second end of the power amplifier 2 is connected with the first end of the tuning component 4, the second end of the tuning component 4 is connected with the first end of the filter 3, and the second end of the filter 3 is used for being connected with the radio frequency antenna 5; the third end of the tuning component 4 is connected with the control end of the radio frequency chip 1, the tuning component 4 comprises N working states, the impedance values of the tuning component 4 under different working states are different, and N is larger than or equal to 2.
Under the condition that the frequency of the radio frequency signal generated by the radio frequency chip 1 is within the target bandwidth range, the radio frequency chip 1 controls the tuning component 4 to work in a target working state associated with the target bandwidth range.
In a specific implementation, the power amplifier 2 may be a linear power amplifier, and when the impedance changes in the signal processing circuit 100, the performance (e.g., linearity, current value, etc.) of the power amplifier 2 is affected, so as to reduce the performance of the radio frequency signal transmitted by the signal processing circuit 100.
In addition, the control terminal of the rf chip 1 and the first terminal of the rf chip 1 may be the same terminal, but of course, they may also be different terminals, and are not limited herein.
Moreover, the tuning assembly 4 may include: at least one of the resistor, the capacitor and the inductor is adjustable in resistance, capacitance and inductance, so that various impedance values can be formed, and the impedance value of the tuning component 1 is adjusted to stabilize the transmission performance of the signal processing circuit 100 when the radio frequency signal generated by the radio frequency chip 1 is in different frequency bands. In specific implementation, the tunable resistor, the tunable capacitor, and the tunable inductor may be set to make the impedance value of the tuning component 4 tunable, and in addition, the tunable resistor, the tunable capacitor, and the tunable inductor may be set to have different resistances, and the selectable switch may be set to make the tuning component 4 have different impedance values when the selectable switch is connected to different resistors, capacitors, and inductors.
In a specific implementation, the signal processing circuit 100 further includes a low noise amplifier 6 and an antenna switch 7, wherein when the antenna switch 7 connects the filter 3 to the tuning component 4, the signal processing circuit 100 can transmit a signal through the radio frequency antenna 5; the signal processing circuit 100 is capable of receiving signals via the radio frequency antenna 5 when the antenna switch 7 connects the filter 3 to the low noise amplifier 6.
As an alternative implementation, as shown in fig. 2, the tuning assembly 4 includes a matching device 41 and a tuning unit 42, a first end of the matching device 41 is connected to the second end of the power amplifier 2, a second end of the matching device 41 is connected to the first end of the filter 3, a first end of the tuning unit 42 is connected to the first end and/or the second end of the matching device 41, and a second end of the tuning unit 42 is grounded.
It should be noted that, in a specific implementation, the matching device 41 may be a resistor, a capacitor, or an inductor, as illustrated in the embodiment shown in fig. 2 by taking the matching device 41 as a resistor, and in an application, the matching device 41 may be determined to be a resistor, a capacitor, or an inductor according to a frequency and a power value of a signal transmitted by the signal processing circuit 100, and a structural parameter of each device in the signal processing circuit 100, for example: when the signal processing circuit 100 needs to increase the resistance, it is determined that the matching device 41 is a resistive element; when the signal processing circuit 100 needs to increase the capacitive reactance, determining that the matching device 41 is a capacitive element; when the signal processing circuit 100 needs to increase the inductive reactance, it is determined that the matching device 41 is an inductive element.
In the implementation, when the bandwidth of the rf signal transmitted by the rf chip 1 is narrow, for example: when the bandwidth of the radio frequency signal is 500MHz, only one tuning unit 42 may be disposed in the tuning assembly 4, where the tuning unit 42 is connected to one of the first end and the second end of the matching device 41, and at this time, the other one of the first end and the second end of the matching device 41 may be grounded through an impedance element, where the impedance element may be any one of a resistor, a capacitor, or an inductor, and a specific value and kind of the impedance element may be determined according to a frequency, a power value, and a structural parameter of each device in the signal processing circuit 100 of the signal processing circuit 100.
In addition, as shown in fig. 2, when the bandwidth of the rf signal transmitted by the rf chip 1 is set to be wide, for example: when the bandwidth of the radio frequency signal is 900MHz, only two tuning units 42 may be disposed in the tuning assembly 4, and in this case, the first end and the second end of the matching device 41 are respectively connected to one tuning unit 42.
In one embodiment, the tuning element 42 may include at least one of an adjustable resistor, an adjustable capacitor, and an adjustable inductor. Therefore, the reactance value of the tuning component 4 can be adjusted by adjusting the values of the adjustable resistor, the adjustable capacitor and the adjustable inductor.
In another embodiment, as shown in fig. 2, the tuning unit 42 includes M matching sub-circuits 420 connected in parallel with each other, each of the matching sub-circuits 420 includes a first switch 421, and a capacitive element 422 and/or an inductive element 423 connected in series with the first switch 421;
the radio frequency chip 1 controls the first switch 421 in the tuning unit 42 to be turned off or turned on, so as to control the tuning component 4 to operate in different operating states.
For example: as shown in fig. 2, the tuning unit 42 includes 3 matching sub-circuits 420 connected in parallel, and the tuning component 4 may include 6 operating states, that is, the combined state of the first switches 421 in the 3 matching sub-circuits 420, if the tuning component 4 includes 3 valid operating states by debugging the operating frequency band of the radio frequency chip, for example: the first working state is as follows: the first switch 421 is open, the second first switch 421 is closed, and the third first switch 421 is closed; the second working state is as follows: the first switch 421 is open, the second first switch 421 is open, and the third first switch 421 is closed; the third working state is as follows: when the first switch 421 is turned off, the second first switch 421 is turned on, and the third first switch 421 is turned off, the operating frequency band of the rf chip can be determined to be divided into 3 bandwidth ranges, each bandwidth range corresponds to an effective operating range, and the effective operating range can adjust the rf impedance generated by the rf signal within the corresponding bandwidth range to a preset impedance range. Therefore, in the operation of the signal processing circuit, the bandwidth range where the radio frequency chip is located can be determined according to the frequency of the radio frequency signal actually transmitted by the radio frequency chip, and the tuning component 4 is adjusted to the working state corresponding to the bandwidth range. In this embodiment, the number of bandwidth ranges divided by the operating frequency band of the radio frequency chip is determined according to the number of effective operating states debugged by the tuning component 4 in the debugging stage, so that time consumption and difficulty of debugging caused by excessive debugging of the tuning component 4 can be reduced. In addition, the number of the effective operating states debugged by the tuning component 4 cannot be adjusted to be within the preset impedance range according to the radio frequency impedance generated by the radio frequency signal within each bandwidth range divided by the number, and then the tuning component 4 can be debugged again to increase the number of the effective operating states of the tuning component 4.
In a specific implementation, the first switch 421 is connected to a control terminal of the rf chip 1, and the control terminal of the rf chip 1 may be a Mobile Industry Processor Interface (MIPI).
It should be noted that the embodiment shown in fig. 2 is only an example for illustrating the structure of the tuning unit 42, and it is not limited herein that M is equal to 3, and each matching subcircuit 420 includes a first switch 421, and a capacitive element 422 and an inductive element 423 connected in series with the first switch 421.
In application, the radio frequency chip 1 determines a required load impedance of the power amplifier 2 according to a frequency band range where a frequency of a radio frequency signal generated by the radio frequency chip is located, determines a target working state of the tuning unit 42 according to a difference between a current impedance value of the power amplifier 2 and a previous value of the required load impedance, and controls connection or disconnection of each first switch in the tuning unit 42 to achieve adjustment of the tuning unit 42 to the target working state.
For example: taking the smith impedance chart as shown in fig. 3 as an example, the matching process of the signal processing circuit 100 is described, and as shown in fig. 3, line a is assumed to be an initial impedance value of the signal processing circuit 100, and a center point of an impedance line formed by the initial impedance value is near 50ohm (ohm) (i.e., the normalized impedance value is 50/Z0 ═ 1ohm, and Z0 ═ 50 is a fixed value), which corresponds to a center position of the smith chart. In addition, as shown in fig. 3, a circle B is a target impedance region matched with the frequency of the radio frequency signal transmitted by the signal processing circuit 100, and in the application, the matching device 41 functions as: the line a is moved to the position of the line C, i.e. the impedance transformation, and the tuning unit 42 functions to: the line C is moved to a position within the circle B. It can be seen from the figure that the circle center value normalized impedance point of the circle B is approximately (1+ j × 0.9), and the actual impedance is (1+ j × 0.9) × 50 ═ 50+ j × 45) ohm. It can be seen that the tuning element 4 is tasked with switching the impedance from 50 to (50+ j 45) ohm, and it is known from microwave theory that since the resistance values before and after matching are the same, only the reactance increases by j 45, which is reflected in the circuit, and represents that an inductance needs to be connected in series, and the value of the inductance can be calculated by the formula j 45 j w L, where the angular velocity w is 2 pi freq, and the freq is the frequency of the rf signal transmitted by the signal processing circuit 100.
It should be noted that the above calculation process is an ideal matching case. In practical applications, the matching result may be biased according to the loss or non-linear characteristics of the circuit traces, the inductors, and the capacitors in the signal processing circuit 100, and thus, the fine tuning is actually required. In addition, impedance transformation can be completed by adopting a reasonable matching form according to the positions of the initial impedance and the target impedance, such as parallel inductor and serial capacitor, parallel capacitor and serial inductor, and the like, which is not limited herein.
In addition, the impedance value of the signal processing circuit 100 when processing the radio frequency signals with different frequencies can be represented by an equal current circle, and the process of representing the impedance transformation of the tuning element 4 by the equal current circle is similar to the process of representing the impedance transformation of the tuning element 4 by the smith impedance circle, and is not repeated herein.
In a specific implementation, when the frequency band of the radio frequency signal processed by the signal processing circuit 100 is wide, the bandwidth of the frequency band may be divided into a plurality of bandwidth ranges in advance, and a correspondence between each bandwidth range and the operating state of the tuning component 4 is stored in the radio frequency chip 1 in advance, so as to control the tuning component 4 to operate in a target operating state corresponding to a target bandwidth range when it is detected that the frequency of the radio frequency signal currently processed by the signal processing circuit 100 is located in the target bandwidth range of the plurality of bandwidth ranges.
It should be noted that, after the radio frequency signals in different bandwidth ranges are tuned by the tuning component 4 in the corresponding operating state, the transmission performance of the radio frequency signals in different bandwidth ranges is consistent, specifically, the transmission performance consistency may include: the current value, power, and the like have uniformity.
For example: as shown in fig. 4 to fig. 6, taking the n77 frequency band (3.3GHz to 4.2GHz) as an example to describe the specific operation process of the signal processing circuit 100, the bandwidth of the n77 frequency band is 900MHz, if the tuning assembly 4 can include three operation states, the bandwidth of the n77 frequency band can be divided into three bandwidth ranges (respectively: L, M and H bandwidth ranges), so that each operation state of the tuning assembly 4 only needs to be responsible for the tuning process of the bandwidth of 300MHz, where each operation state is responsible for the tuning process of the bandwidth of 300MHz may refer to: each working state only transforms the impedance curve of the frequency band range which is responsible for the working state into the target impedance region, but not transforms the impedance curve of the whole frequency band into the target impedance region, so that the matching difficulty can be obviously reduced. The specific operation method comprises the following steps: as shown in fig. 4, if the transmission frequency of the signal processing circuit 100 is in the L region (3.3GHz to 3.6GHz), the radio frequency chip 1 controls the first switch in the tuning component 4 to be turned on or off to adjust the tuning component 4 to the first operating state, and the tuning component 4 in the first operating state functions to move the frequency band impedance of the L region (i.e., the line a shown in fig. 4) into the target impedance region (i.e., the circle B shown in fig. 4).
Similarly, as shown in fig. 5, if the transmission frequency of the signal processing circuit 100 is in the M region (3.6GHz to 3.9GHz), the rf chip 1 controls the first switch in the tuning element 4 to be turned on or off to adjust the tuning element 4 to the second operating state, and the tuning element 4 in the second operating state functions to move the frequency band impedance of the M region (i.e., the line a shown in fig. 5) to the target impedance region (i.e., the circle B shown in fig. 5).
In addition, as shown in fig. 6, if the transmission frequency of the signal processing circuit 100 is in the H region (3.6GHz to 3.9GHz), the radio frequency chip 1 controls the first switch in the tuning component 4 to be turned on or off to adjust the tuning component 4 to the third operating state, and the tuning component 4 in the third operating state functions to move the frequency band impedance of the H region (i.e., the line a shown in fig. 6) to the target impedance region (i.e., the circle B shown in fig. 6).
In this embodiment, the PA loads in each frequency band can be specifically adjusted by using a multipath matching method, thereby ensuring TX transmission consistency.
It should be noted that, if the tuning component 4 includes three operating states, the frequency band impedance in the L, M or H bandwidth region cannot be completely converted into the corresponding target region, the number of matching sub-circuits in the tuning component 4 may be increased, or capacitance, resistance, or inductance elements may be added, so that the tuning component 4 has 4 or more adjustable operating states, and the spread of the frequency band impedance responsible for each operating state of the tuning component 4 is reduced, thereby ensuring that each operating state of the tuning component 4 can convert the frequency band impedance in the corresponding bandwidth region into the target impedance region.
The signal processing circuit provided in the embodiment of the present invention includes: the radio frequency chip, the power amplifier, the filter and the tuning assembly; the first end of the radio frequency chip is connected with the first end of the power amplifier, the second end of the power amplifier is connected with the first end of the tuning component, the second end of the tuning component is connected with the first end of the filter, and the second end of the filter is used for being connected with a radio frequency antenna; the third end of the tuning component is connected with the control end of the radio frequency chip, the tuning component comprises N working states, the impedance values of the tuning component are different under different working states, and N is more than or equal to 2; and under the condition that the frequency of a radio-frequency signal generated by the radio-frequency chip is within a target bandwidth range, the radio-frequency chip controls the tuning component to work in a target working state associated with the target bandwidth range. When the frequency of the radio frequency signal generated by the radio frequency chip is in different bandwidth ranges, the tuning component is enabled to work in a working state associated with the bandwidth ranges, so that the impedance value of the tuning component can be matched with the bandwidth ranges, the load of the power amplifier is kept stable, the power consumption generated when the signal processing circuit transmits the transmission signals with different frequencies is consistent, and the debugging complexity of the signal processing circuit is reduced.
An embodiment of the present invention further provides an electronic device, where the electronic device includes the signal processing circuit and a radio frequency antenna provided in the previous embodiment, and the radio frequency antenna is connected to a second end of a filter in the signal processing circuit.
In this embodiment, the electronic Device may be a Mobile phone, a Tablet personal Computer (Tablet personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or the like.
The electronic device provided by the embodiment of the invention can make the radio frequency signals emitted by the electronic device in different bandwidth ranges have consistency, thereby improving the emission performance of the electronic device, obtaining the same beneficial effects as the signal processing circuit provided by the previous embodiment, and avoiding repetition, and the details are not repeated herein.
Referring to fig. 7, which is a flowchart of a signal processing method according to an embodiment of the present invention, the signal processing method can be applied to the electronic device according to the previous embodiment, and as shown in fig. 7, the signal processing method may include the following steps:
In a specific implementation, the operating frequency band of the radio frequency chip may be an n77 frequency band, an n78 frequency band, an n79 frequency band, or the like in the sub6G network. The bandwidth of the n77 frequency band is 900MHz, the bandwidth of the n78 frequency band is 500MHz, and the bandwidth of the n79 frequency band is 600 MHz. In addition, the preset bandwidth may be set to 200MHz or 300MHz, and may be specifically determined according to the requirement of a specific application scenario on the consistency of the radio frequency signal and the degree of influence of frequency change on the power amplifier in the signal processing circuit. For example: if the application scenario of the signal processing method has a high requirement on the consistency of the radio frequency signals and the influence of frequency change on a power amplifier in the signal processing circuit is large, the value of the preset bandwidth is small.
In addition, the value of N may be determined according to the bandwidth of the operating frequency band of the radio frequency chip, the number of the operating states debugged by the tuning component, and the like, for example: when 3 effective working states are debugged for the tuning component in the debugging stage, the bandwidth of the working frequency band can be averagely divided into 3 bandwidth ranges, and the working states of the tuning component correspond to the 3 bandwidth ranges one by one, so that the radio frequency impedance generated by the radio frequency signal in the corresponding bandwidth range is converted into a target impedance interval through the tuning component, and the transmission performance of the radio frequency signal in different bandwidth ranges is consistent.
For another example: in a default situation, the bandwidth of the operating frequency band of the rf chip is divided into 3 bandwidth ranges, when the 3 bandwidth ranges are subjected to impedance conversion through 3 operating states of the tuning component, if the rf impedance generated by the rf signal in each bandwidth range cannot be converted to the target impedance range, the bandwidth of the operating frequency band of the rf chip may be divided into 4 bandwidth ranges, and when the 4 bandwidth ranges are subjected to impedance conversion through 4 operating states of the tuning component.
In a specific implementation, the preset impedance range may have the same meaning as a target impedance region in the signal processing circuit provided in the embodiment of the present invention, and in addition, different bandwidth ranges may correspond to preset impedance ranges with different values, and the tuning component operating in the target operating state may adjust the radio frequency impedance of the radio frequency signal to be within the preset impedance range, which may be expressed as: the tuning component working in the target working state can adjust the radio frequency impedance of the radio frequency signal to be within a preset impedance range corresponding to the target bandwidth range.
In addition, in the specific implementation, the radio frequency chip stores in advance the association relationship between each bandwidth range and the corresponding operating state.
As an optional implementation manner, before determining that the tuning component operates in the target operating state according to the frequency of the radio frequency signal generated by the radio frequency chip, the method further includes:
acquiring an initial impedance value of radio frequency impedance in the signal processing circuit, and acquiring the preset impedance range, wherein the initial impedance value of the radio frequency impedance is an impedance value generated when the tuning assembly does not work and the radio frequency signal is transmitted through the signal processing circuit;
and determining the target working state of the tuning component according to the difference value between the initial impedance value and the preset impedance range.
In a specific implementation, the tuning component is not operated, for example, when all the first switches 41 in the tuning component 4 are in an off state as shown in fig. 2, or when the tuning component includes a tunable resistor, a tunable capacitor, or a tunable inductor, the tunable resistor, the tunable capacitor, or the tunable inductor is adjusted to a 0 value state.
In addition, the determining the target operating state of the tuning component according to the difference between the initial impedance value and the preset impedance range may be determining the difference between the initial impedance value and the preset impedance range as an output impedance value of the tuning component, and when the impedance value of the tuning component is adjusted to the output impedance value, the tuning component operates in the target operating state.
And step 703, controlling the tuning component to work in the target working state.
In specific implementation, the tuning component operating in the target operating state can convert the radio frequency impedance generated by the radio frequency signal within the target bandwidth range into a target impedance region, so as to prevent the radio frequency impedance within the target impedance region from damaging consistency parameters such as linearity or current stability of the power amplifier, and thus achieve consistency improvement when the radio frequency signal is transmitted by the signal processing method.
As an optional implementation, after determining the target operating state associated with the target bandwidth in the case that the frequency of the radio frequency signal generated by the radio frequency chip is within the target bandwidth, the method further includes:
and controlling the radio frequency chip to generate the radio frequency signals according to target output parameters corresponding to the target bandwidth range, wherein the radio frequency signals in different bandwidth ranges are transmitted according to the corresponding output parameters, and the performance parameters of the radio frequency signals in the different bandwidth ranges have consistency.
In a specific implementation, the target output parameter may be a power, a voltage value, or the like of the rf signal. In addition, in the application, for radio frequency signals in different bandwidth ranges, parameters affecting the performance of the power amplifier can be detected in advance according to Average Power Tracking (APT), quiescent operating current (ICQ) of the power amplifier and the like and stored in the electronic device, and in the process of signal processing, if the electronic device detects that the performance parameters in the signal processing circuit conform to the prestored parameters affecting the performance of the power amplifier, the target output parameters of the radio frequency signals are adjusted to change the performance parameter values such as current and the like when the radio frequency signals are processed by the power amplifier, so that the radio frequency signals have consistency.
For example: on the basis of ensuring that the performance parameters of the radio frequency signals in different bandwidth ranges are consistent, if the transmission power of the first radio frequency signal in the first bandwidth range is 20dB, the radio frequency signal can be output according to the output voltage of 3.5V; if the transmission power of the second rf signal in the second bandwidth range is 10dB, the rf signal can be output with an output voltage of 1.8V. In this way, the current values generated when the signal processing circuit transmits the first radio frequency signal in the first bandwidth range and when the signal processing circuit transmits the second radio frequency signal in the second bandwidth range are close to each other, so that the radio frequency signals transmitted by the signal processing method have current consistency. In addition, when the second radio frequency signal in the second bandwidth range is transmitted, the power and the voltage of the second radio frequency signal are reduced relative to the power and the voltage when the second radio frequency signal in the second bandwidth range is transmitted, so that the energy consumption in the signal processing process can be reduced.
The signal processing method provided by the embodiment of the invention can enable the radio frequency signals in different bandwidth ranges to have consistent emission performance, is convenient for demodulation when the network side equipment receives the radio frequency signals, has the same beneficial effects as the signal processing circuit embodiment provided by the invention, and is not repeated herein for avoiding repetition.
Referring to fig. 8, fig. 8 is a schematic diagram of a hardware structure of an electronic device for implementing various embodiments of the present invention, where the electronic device 800 includes, but is not limited to: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809, a processor 810, and a power supply 811. Those skilled in the art will appreciate that the electronic device configuration shown in fig. 8 does not constitute a limitation of the electronic device, and that the electronic device may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the electronic device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
Wherein, the processor 810 is configured to:
under the condition that the bandwidth of the working frequency band of the radio frequency chip is larger than a preset bandwidth, dividing the bandwidth of the working frequency band into N bandwidth ranges, wherein N is more than or equal to 2;
determining a target working state associated with a target bandwidth range under the condition that the frequency of a radio-frequency signal generated by the radio-frequency chip is within the target bandwidth range, wherein a tuning component working in the target working state can adjust the radio-frequency impedance of the radio-frequency signal to be within a preset impedance range, and the target bandwidth range is one of the N bandwidth ranges;
and controlling the tuning assembly to work in the target working state.
Optionally, before executing the determining that the tuning component operates in the target operating state according to the frequency of the radio frequency signal generated by the radio frequency chip, the processor 810 is further configured to:
acquiring an initial impedance value of radio frequency impedance in the signal processing circuit, and acquiring the preset impedance range, wherein the initial impedance value of the radio frequency impedance is an impedance value generated when the tuning assembly does not work and the radio frequency signal is transmitted through the signal processing circuit;
and determining the target working state of the tuning component according to the difference value between the initial impedance value and the preset impedance range.
Optionally, after the processor 810 determines the target operating state associated with the target bandwidth in the case that the frequency of the radio frequency signal generated by the radio frequency chip is within the target bandwidth, the processor is further configured to:
and controlling the radio frequency chip to generate the radio frequency signals according to target output parameters corresponding to the target bandwidth range, wherein the radio frequency signals in different bandwidth ranges are transmitted according to the corresponding output parameters, and the performance parameters of the radio frequency signals in the different bandwidth ranges have consistency.
The electronic device provided by the embodiment of the invention has the same beneficial effects as the signal processing method provided by the embodiment of the invention, and is not repeated herein for avoiding repetition.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 801 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 810; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 801 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. Further, the radio frequency unit 801 can also communicate with a network and other devices through a wireless communication system.
The electronic device provides wireless broadband internet access to the user via the network module 802, such as to assist the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.
The audio output unit 803 may convert audio data received by the radio frequency unit 801 or the network module 802 or stored in the memory 809 into an audio signal and output as sound. Also, the audio output unit 803 may also provide audio output related to a specific function performed by the electronic apparatus 800 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 803 includes a speaker, a buzzer, a receiver, and the like.
The input unit 804 is used for receiving an audio or video signal. The input Unit 804 may include a Graphics Processing Unit (GPU) 8041 and a microphone 8042, and the Graphics processor 8041 processes image data of a still picture or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 806. The image frames processed by the graphics processor 8041 may be stored in the memory 809 (or other storage medium) or transmitted via the radio frequency unit 801 or the network module 802. The microphone 8042 can receive sound, and can process such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 801 in case of a phone call mode.
The electronic device 800 also includes at least one sensor 805, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 8061 according to the brightness of ambient light and a proximity sensor that can turn off the display panel 8061 and/or the backlight when the electronic device 800 is moved to the ear. As one type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of an electronic device (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 805 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.
The display unit 806 is used to display information input by the user or information provided to the user. The Display unit 806 may include a Display panel 8061, and the Display panel 8061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 807 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic apparatus. Specifically, the user input unit 807 includes a touch panel 8071 and other input devices 8072. The touch panel 8071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 8071 (e.g., operations by a user on or near the touch panel 8071 using a finger, a stylus, or any other suitable object or accessory). The touch panel 8071 may include two portions of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 810, receives a command from the processor 810, and executes the command. In addition, the touch panel 8071 can be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 8071, the user input unit 807 can include other input devices 8072. In particular, other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.
Further, the touch panel 8071 can be overlaid on the display panel 8061, and when the touch panel 8071 detects a touch operation on or near the touch panel 8071, the touch operation is transmitted to the processor 810 to determine the type of the touch event, and then the processor 810 provides a corresponding visual output on the display panel 8061 according to the type of the touch event. Although in fig. 8, the touch panel 8071 and the display panel 8061 are two independent components to implement the input and output functions of the electronic device, in some embodiments, the touch panel 8071 and the display panel 8061 may be integrated to implement the input and output functions of the electronic device, and this is not limited herein.
The interface unit 808 is an interface for connecting an external device to the electronic apparatus 800. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 808 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the electronic device 800 or may be used to transmit data between the electronic device 800 and external devices.
The memory 809 may be used to store software programs as well as various data. The memory 809 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 809 can include high speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 810 is a control center of the electronic device, connects various parts of the whole electronic device by using various interfaces and lines, performs various functions of the electronic device and processes data by running or executing software programs and/or modules stored in the memory 809 and calling data stored in the memory 809, thereby monitoring the whole electronic device. Processor 810 may include one or more processing units; preferably, the processor 810 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 810.
The electronic device 800 may further include a power supply 810 (e.g., a battery) for supplying power to the various components, and preferably, the power supply 810 may be logically coupled to the processor 810 via a power management system, such that functions of managing charging, discharging, and power consumption are performed via the power management system.
In addition, the electronic device 800 includes some functional modules that are not shown, and are not described in detail herein.
Preferably, an embodiment of the present invention further provides an electronic device, which includes a processor 810, a memory 809, and a computer program stored in the memory 809 and capable of running on the processor 810, where the computer program, when executed by the processor 810, implements each process of the signal processing method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling an electronic device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A signal processing circuit, comprising: the radio frequency chip, the power amplifier, the filter and the tuning assembly;
the first end of the radio frequency chip is connected with the first end of the power amplifier, the second end of the power amplifier is connected with the first end of the tuning component, the second end of the tuning component is connected with the first end of the filter, and the second end of the filter is used for being connected with a radio frequency antenna; the third end of the tuning component is connected with the control end of the radio frequency chip, the tuning component comprises N working states, the impedance values of the tuning component are different under different working states, and N is more than or equal to 2;
and under the condition that the frequency of a radio-frequency signal generated by the radio-frequency chip is within a target bandwidth range, the radio-frequency chip controls the tuning component to work in a target working state associated with the target bandwidth range.
2. The signal processing circuit of claim 1, wherein the tuning component comprises a matching device and a tuning element, a first terminal of the matching device is connected to the second terminal of the power amplifier, a second terminal of the matching device is connected to the first terminal of the filter, a first terminal of the tuning element is connected to the first terminal and/or the second terminal of the matching device, and a second terminal of the tuning element is connected to ground.
3. A signal processing circuit according to claim 2, wherein the tuning unit comprises M matching sub-circuits connected in parallel with each other, each matching sub-circuit comprising a first switch, and a capacitive element and/or an inductive element in series with the first switch;
the radio frequency chip controls a first switch in the tuning unit to be switched off or switched on so as to control the tuning component to work in different working states.
4. A signal processing circuit according to claim 2 or 3, wherein the tuning assembly comprises two of the tuning elements, the two tuning elements being connected to respective ends of the matching device.
5. An electronic device comprising the signal processing circuit of any one of claims 1 to 4 and a radio frequency antenna, the radio frequency antenna being connected to the second terminal of the filter in the signal processing circuit.
6. A signal processing method applied to the electronic device according to claim 5, the method comprising:
under the condition that the bandwidth of the working frequency band of the radio frequency chip is larger than a preset bandwidth, dividing the bandwidth of the working frequency band into N bandwidth ranges, wherein N is more than or equal to 2;
determining a target working state associated with a target bandwidth range under the condition that the frequency of a radio-frequency signal generated by the radio-frequency chip is within the target bandwidth range, wherein a tuning component working in the target working state can adjust the radio-frequency impedance of the radio-frequency signal to be within a preset impedance range, and the target bandwidth range is one of the N bandwidth ranges;
and controlling the tuning assembly to work in the target working state.
7. The signal processing method of claim 6, wherein before determining that the tuning component operates in the target operating state according to the frequency of the radio frequency signal generated by the radio frequency chip, the method further comprises:
acquiring an initial impedance value of radio frequency impedance in the signal processing circuit, and acquiring the preset impedance range, wherein the initial impedance value of the radio frequency impedance is an impedance value generated when the tuning assembly does not work and the radio frequency signal is transmitted through the signal processing circuit;
and determining the target working state of the tuning component according to the difference value between the initial impedance value and the preset impedance range.
8. The signal processing method of claim 6, wherein after determining a target operating state associated with a target bandwidth in a case where a frequency of the radio frequency signal generated by the radio frequency chip is within the target bandwidth, the method further comprises:
and controlling the radio frequency chip to generate the radio frequency signals according to target output parameters corresponding to the target bandwidth range, wherein the radio frequency signals in different bandwidth ranges are transmitted according to the corresponding output parameters, and the performance parameters of the radio frequency signals in the different bandwidth ranges have consistency.
9. An electronic device, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the signal processing method according to any one of claims 6 to 8.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the signal processing method according to any one of claims 6 to 8.
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