CN117811601A - Radio frequency transceiver, electronic device and filtering processing method - Google Patents

Abstract

The application relates to a radio frequency transceiver, electronic equipment and a filtering processing method, wherein the radio frequency transceiver comprises a transmitting link; a reconfigurable filter is arranged in the transmitting link; the filter parameters of the reconfigurable filter can be configured to be adjusted based on the target frequency band of the target radio frequency signal transmitted by the transmitting link so as to filter out the target interference signal generated in the transmitting process of the target radio frequency signal; the target interference signal is an interference signal capable of generating a third-order intermodulation signal CIM 3. The radio frequency transceiver can save the area of a single board and is beneficial to improving the test efficiency on the basis of meeting the air interface index.

Description

Radio frequency transceiver, electronic device and filtering processing method

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a radio frequency transceiver, an electronic device, and a filtering processing method.

Background

In the communication technology, due to the nonlinearity of the transmission channel, some interference signals are generated during the transmission of the radio frequency signal, and other interference signals, such as third-order intermodulation signal CIM3, are generated by the interference signals.

In the related art, an interference signal is optimized by reserving multiple sets of matching locations between a radio frequency transceiver and a power amplifier. In the related art, some matching positions need to be reserved for the single board in the electronic device, so that the single board area of the electronic device is larger.

Disclosure of Invention

Based on the foregoing, it is necessary to provide a radio frequency transceiver, an electronic device and a filtering processing method.

In a first aspect, the present application provides a radio frequency transceiver comprising a transmit chain; a reconfigurable filter is arranged in the transmitting link;

the filter parameters of the reconfigurable filter can be configured to be adjusted based on the target frequency band of the target radio frequency signal transmitted by the transmitting link so as to filter out the target interference signal generated in the transmitting process of the target radio frequency signal;

the target interference signal is an interference signal capable of generating a third-order intermodulation signal CIM 3.

In a second aspect, the present application provides an electronic device comprising a baseband processor and a radio frequency transceiver as in the first aspect above;

wherein the baseband processor is configured to:

acquiring a target frequency band of a target radio frequency signal transmitted by a transmitting link in a radio frequency transceiver;

Adjusting filter parameters of the reconfigurable filter according to the target frequency band control to filter target interference signals generated in the target radio frequency signal transmitting process;

the target interference signal is an interference signal capable of generating a third-order intermodulation signal CIM 3.

In a third aspect, the present application provides a filtering processing method, where the method is applied to an electronic device according to the second aspect; the method comprises the following steps:

acquiring a target frequency band of a target radio frequency signal transmitted by a transmitting link in a radio frequency transceiver;

adjusting filter parameters of the reconfigurable filter according to the target frequency band control to filter target interference signals generated in the target radio frequency signal transmitting process;

the target interference signal is an interference signal capable of generating a third-order intermodulation signal CIM 3.

According to the radio frequency transceiver, the electronic equipment and the filtering processing method, the reconfigurable filter is arranged in the transmitting link of the radio frequency transceiver, wherein the filter parameters of the reconfigurable filter can be configured to be adaptively adjusted based on the target frequency band of the target radio frequency signal transmitted by the transmitting link so as to filter out the target interference signal (the interference signal capable of generating the third-order intermodulation signal CIM 3) generated in the transmitting process of the target radio frequency signal, the purpose that the CIM3 can be still optimized under the condition that a matching position is not required to be reserved on a single board can be achieved, and therefore CIM5 and CIM7 can be optimized to meet the air interface index. Therefore, the radio frequency transceiver of the embodiment of the application can save the single board area and is beneficial to improving the test efficiency on the basis of meeting the air interface index.

Drawings

Fig. 1 is a schematic diagram of a principle of generating CIM3 in a transmitting link of a radio frequency transceiver provided in the related art;

fig. 2 is a schematic diagram of a processing flow of a baseband signal provided in the related art;

fig. 3 is a schematic diagram of generation of CIM5 and CIM7 in a transmission link of a radio frequency transceiver provided in the related art;

fig. 4 is a schematic structural diagram of a radio frequency transceiver according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a reconfigurable filter according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a radio frequency transceiver according to another embodiment of the present application;

fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an electronic device according to another embodiment of the present application;

fig. 9 is a schematic structural diagram of an electronic device according to another embodiment of the present application;

FIG. 10 is a flow chart of a filtering method according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a filtering device in an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may explicitly or implicitly include one or more features.

The radio frequency transceiver, the electronic equipment and the filtering processing method provided by the embodiment of the application can be applied to application scenes of radio frequency signal transmission under a fifth generation new radio frequency (the 5th Generation New Radio,5G NR) communication system or a Long-Term Evolution (LTE) communication system; of course, the method and the device can also be applied to other scenes, for example, an application scene of radio frequency signal transmission under a WIFI communication system of a wireless network communication technology, an application scene of radio frequency signal transmission under a millimeter wave communication system, or an application scene of radio frequency signal transmission under a non-terrestrial network (Non Terrestrial Network, NTN) communication system, which is not limited in the embodiment of the present application.

In communication technology, due to the nonlinearity of the transmit channel, some interference signals are generated during the transmission of the radio frequency signal, and these interference signals in turn generate other interference signals. In general, in addition to representing other interference signals by using 1dB compression points, input double tone third order intermodulation points (Input 3rd order intercept point,IIP3), output double tone third order intermodulation points (Output 3rd order intercept point,OIP3), and the like, the signal can be represented by a quantization index of nonlinearity such as a 3-order count intermodulation (Counter Intermodulation, CIM 3) signal, a CIM5 signal, a CIM7 signal, and the like.

Because the CIM3 signal is near the local oscillation LO and is not easy to be filtered by a filter, and a front-end Power Amplifier (PA) generates CIM5 and CIM7, the adjacent channel leakage ratio (Adjacent Channel Leakage Ratio, ACLR) of the transmitting TX, the spectrum template (Spectrum emission mask, SEM) and/or the spurious radiation (spectrum emission, SE) are affected, which may also affect the receiving RX frequency band.

Illustratively, if the amount of signal (TX transmitted signal) frequency to be transmitted is lo+bb, the frequency component of the CIM3 signal may be LO-3BB; if the frequency component of the signal to be transmitted (otherwise referred to as the target radio frequency signal) is LO-BB, the frequency component of the CIM3 signal may be lo+3bb.

In the following embodiments of the present application, the frequency of a signal to be transmitted (TX transmitted signal) is lo+bb as an example, and the radio frequency transceiver, the electronic device, and the filtering method in the embodiments of the present application are described for the sake of understanding; of course, the radio frequency transceiver, the electronic device and the filtering processing method in the embodiments of the present application may also be applicable to other signal frequency amounts that want to be transmitted, and implementation principles and technical effects are similar.

Therefore, CIM3 has an important influence in the signal transmission process in the communication system, and in order to improve the communication quality, it is necessary to optimize CIM3 so that CIM5 and CIM7 can be optimized.

For ease of understanding, the principles of generation of CIM3, CIM5 and CIM7 are described in order in the following examples of this application.

1) Principle of CIM3 production

Fig. 1 is a schematic diagram of a principle of generating CIM3 in a transmitting link of a radio frequency Transceiver (Transceiver) provided in the related art, as shown in fig. 1, a Digital baseband signal sequentially passes through a Digital front end (Digital front end, DFE) 11, a Digital-to-analog converter (DAC) 12, and a Low-pass filter (LPF) 13 to obtain an analog baseband signal BB.

Further, the analog baseband signal BB and the local oscillation signal LO generated by the local oscillator are mixed by a Mixer (Mixer) 14, and a desired (Wanted, wtd) lo+bb signal can be obtained. In addition, the harmonic component 3LO generated by the local oscillator signal LO further generates a 3LO-BB signal, otherwise known as the HD3 signal, at the output of the mixer 14.

Further, the 3LO-BB signal and the desired lo+bb signal are passed through a variable gain Amplifier (Variable gain Amplifier, VGA) 15 or a Power Amplifier (PA) 16, yielding a CIM3 signal: (3 LO-BB) -2 (lo+bb) =lo-3 BB.

As shown in fig. 1, the signal output by the VGA15 may include: wanted lo+bb signal, non-ideal LO', image signal of LO (IMG), CIM3 and HD3 signals; the non-ideal LO', the Image signal of the LO, and the CIM3 are signals that are not easy to filter.

Fig. 2 is a schematic diagram of a processing flow of a baseband signal provided in the related art, as shown in fig. 2, assuming that an IQ mode is adopted to transmit a radio frequency signal, the IQ-input baseband signals are respectively: acosω _BB t and Asin omega _BB t, wherein A represents the amplitude, ω, of the baseband signal _BB Representing the frequency of the baseband signal, the mixer is an ideal switch, taking the square wave as an even function in the I path, and the fourier series is developed as the following equation (1):

wherein omega _LO Representing the frequency of the local oscillator signal. In addition, regarding the square wave as an odd function in the Q path, the fourier series is developed as the following equation (2):

usually focusing only on fundamental and 3 rd harmonics, the signal X output by the mixer _out The fundamental component of (t) can be expressed as the following formula (3):

signal X output by mixer _out The 3 rd harmonic component of (t) can be expressed as the following equation (4):

thus, the CIM3 component resulting from the 3 rd order nonlinearity of VGA or PA is (3 LO-BB) -2 (lo+bb) =lo-3 BB.

2) Principle of CIM5 and CIM7 generation

Fig. 3 is a schematic diagram of generating CIM5 and CIM7 in a transmitting chain of a radio frequency transceiver provided in the related art, and as shown in fig. 3, a CIM3 component output by a VGA14 is amplified by a Power Amplifier (PA) 15, so as to further generate a CIM5 component and a CIM7 component, i.e., lo+5bb and LO-7BB in fig. 3. Wherein, due to CIM5 component and CIM7 component caused by third-order nonlinearity of the PA, the third-order intermodulation output of the PA is: 2 (lo+bb) - (LO-3 BB) =lo+5bb, and 2 (LO-3 BB) - (lo+bb) =lo-7 BB.

The CIM5 component and the CIM7 component are in a spurious test interval defined by a third generation partnership project (3rd Generation Partnership Project,3GPP), if CIM3 is not optimized well, the CIM5 component and the CIM7 component are directly caused to be high, and the spurious authentication of the electronic equipment is at an excessive risk.

In the related art, the interference signal 3LO-BB is optimized by reserving a plurality of sets of matching locations (e.g., at least 6 sets of matching locations) between the VGA of the radio frequency transceiver and the external PA to optimize the CIM3 component. However, in the related art, some matching positions need to be reserved for the single board in the electronic device, so that the single board area of the electronic device is larger.

In order to solve the problem of large single board area of electronic equipment in the related art, according to the radio frequency transceiver, the electronic equipment and the filtering processing method provided by the embodiment of the invention, the filter parameter of the reconfigurable filter can be adaptively adjusted based on the target frequency band of the target radio frequency signal transmitted by the transmitting link by arranging the reconfigurable filter with controllable and adjustable filter parameter in the transmitting link of the radio frequency transceiver, so as to filter out the target interference signal (the interference signal capable of generating the third-order intermodulation signal CIM 3) generated in the transmitting process of the target radio frequency signal, and still optimize the CIM3 without additionally reserving a matching position on the single board, thereby optimizing CIM5 and CIM7 to meet the air interface index. Therefore, the radio frequency transceiver of the embodiment of the application can save the single board area and is beneficial to improving the test efficiency on the basis of meeting the air interface index.

For example, the electronic device in the embodiment of the application may be, but not limited to, various smart phones, tablet computers, internet of things devices and portable wearable devices, and the internet of things devices may be smart speakers, smart televisions, smart air conditioners, smart vehicle devices, and the like. The portable wearable device may be a smart watch, smart bracelet, headset, or the like.

In one embodiment, fig. 4 is a schematic structural diagram of a radio frequency transceiver according to an embodiment of the present application, and as shown in fig. 4, the radio frequency transceiver according to an embodiment of the present application may include a transmitting link, where a reconfigurable filter 401 may be disposed in the transmitting link.

The filter parameters of the reconfigurable filter in the embodiment of the application may be configured to adjust based on the target frequency band of the target radio frequency signal transmitted by the transmitting link, so as to filter out the target interference signal generated in the transmitting process of the target radio frequency signal. The target interference signal is an interference signal capable of generating a third-order intermodulation signal CIM 3.

In a possible implementation manner, the filter parameters in the embodiments of the present application may include: the capacitance value of the capacitor in the reconfigurable filter and/or the inductance value of the inductor in the reconfigurable filter.

In another possible implementation manner, the filter parameters in the embodiments of the present application may include: the capacitance value of the capacitor in the reconfigurable filter and/or the resistance value of the resistor in the reconfigurable filter.

Of course, the filter parameters in the embodiments of the present application are different as the structure of the reconfigurable filter in the embodiments of the present application is different.

Illustratively, the target frequency band in the embodiments of the present application may include, but is not limited to: the network device is a frequency band which is configured for the electronic device to which the radio frequency transceiver belongs in advance and used for sending radio frequency signals to the network device, or the electronic device to which the radio frequency transceiver belongs is a frequency band which is applied to the network device in advance and used for sending radio frequency signals to the network device.

Illustratively, the target interference signal in the embodiment of the present application may include: the harmonic component 3 x LO generated by the local oscillator signal LO is a 3LO-BB signal further generated at the output of the mixer, otherwise referred to as HD3 signal; of course, other interference signals capable of generating the third-order intermodulation signal CIM3 may also be included.

In consideration of different target frequency bands of the target radio frequency signals transmitted by the transmitting link, the target interference signals are different, and in this embodiment of the present application, by setting a reconfigurable filter in the transmitting link of the radio frequency transceiver, filter parameters of the reconfigurable filter may be configured to adaptively adjust based on the target frequency bands of the target radio frequency signals transmitted by the transmitting link, so that the reconfigurable filter may allow the target radio frequency signals to pass through, and prohibit the target interference signals from passing through, so as to filter out the target interference signals generated in the transmitting process of the target radio frequency signals, so as to achieve the purpose of optimizing CIM3, so that CIM5 and CIM7 may also be optimized.

In one possible implementation, the reconfigurable filter may actively adjust the filter parameters based on a target frequency band of a target radio frequency signal transmitted by the transmit chain.

In another possible implementation, the reconfigurable filter may adjust the filter parameters based on the target frequency band of the target radio frequency signal transmitted by the transmit chain under control of other devices.

Of course, the reconfigurable filter may also adjust the filter parameters in other ways.

It should be understood that the difference in the filter parameters of the reconfigurable filter in the embodiments of the present application may cause the frequency bands of the radio frequency signals allowed to pass through the reconfigurable filter to be different.

Illustratively, the reconfigurable filter in the embodiments of the present application may be a low-pass reconfigurable filter. Correspondingly, the cut-off frequency of the low-pass reconfigurable filter in the embodiment of the application is larger than the maximum frequency of the target frequency band and smaller than the minimum frequency of the target interference signal, so that the target radio frequency signal can be allowed to pass through, and the target interference signal is forbidden to pass through, so that the target interference signal generated in the transmission process of the target radio frequency signal is filtered.

Of course, the reconfigurable filter in the embodiment of the present application may also be a band-pass reconfigurable filter or a band-stop reconfigurable filter.

For ease of understanding, the following embodiments of the present application will describe exemplary configurations of reconfigurable filters.

Fig. 5 is a schematic structural diagram of a reconfigurable filter provided in an embodiment of the present application, and as shown in fig. 5, the reconfigurable filter in the embodiment of the present application may include, but is not limited to: the adjustable inductor L is arranged on the main branch, and the first adjustable capacitor C1 and the second adjustable capacitor C2 are respectively connected with the main branches at two ends of the adjustable inductor L. Correspondingly, the filter parameters in the embodiments of the present application may include, but are not limited to, the capacitance values of the first adjustable capacitor C1 and the second adjustable capacitor C2 in the reconfigurable filter, and the inductance value of the adjustable inductance L in the reconfigurable filter.

Therefore, the parameters of the inductance and the capacitance in the reconfigurable filter are adjustable and controllable, and the inductance value and the capacitance value can be adaptively adjusted based on the target frequency band of the target radio frequency signal transmitted by the transmitting link, so that the filter requirement is met, the target interference signal generated in the transmitting process of the target radio frequency signal is filtered, and the aim of optimizing CIM3, CIM5 and CIM7 can be achieved.

Of course, the reconfigurable filter in the embodiment of the present application may also adopt other structures, which is not limited in the embodiment of the present application.

It should be noted that, the radio frequency transceiver of the embodiment of the present application may further include other links (e.g., a receiving link, etc.), and other devices (e.g., a digital-to-analog converter and/or a mixer, etc.) may also be disposed in the transmitting link of the embodiment of the present application.

In summary, in this embodiment of the present application, by providing a reconfigurable filter in a transmitting link of a radio frequency transceiver, where filter parameters of the reconfigurable filter may be configured to adaptively adjust based on a target frequency band of a target radio frequency signal transmitted by the transmitting link, so as to filter a target interference signal (an interference signal capable of generating a third-order intermodulation signal CIM 3) generated in a target radio frequency signal transmitting process, so that a purpose of optimizing CIM3 may still be achieved without reserving a matching position on a board, and thereby CIM5 and CIM7 may also be optimized to meet an air interface index, which is beneficial to improving test efficiency. Therefore, the radio frequency transceiver of the embodiment of the application can save the single board area and is beneficial to improving the test efficiency on the basis of meeting the air interface index.

In an embodiment, fig. 6 is a schematic structural diagram of a radio frequency transceiver according to another embodiment of the present application, and on the basis of the foregoing embodiment, as shown in fig. 6, a transmitting chain of the radio frequency transceiver according to the embodiment of the present application may further include a digital front end DFE 402, a digital-to-analog converter DAC 403, a low-pass filter LPF 404, a mixer 405, and a first amplifier 406 that are sequentially connected. Illustratively, the first amplifier 406 in embodiments of the present application may include, but is not limited to, a variable gain amplifier VGA.

In this embodiment, after passing through the digital front end DFE 402, the digital baseband signal is converted from digital to analog by the digital-to-analog converter DAC 403, and then the harmonic signal is filtered by the low pass filter LPF 404 to obtain the analog baseband signal BB. Further, the analog baseband signal BB and the local oscillator signal LO generated by the local oscillator are up-converted to a desired target frequency band in the mixer 405 (in this process, a target interference signal is generated), and amplified in the analog domain by the first amplifier 406, so as to obtain an output signal, where the output signal may include, but is not limited to, the target interference signal.

In a possible implementation, as shown in fig. 6, the input of the reconfigurable filter 401 in the embodiment of the present application may be connected to the output of the first amplifier 406.

In this implementation manner, the reconfigurable filter 401 may perform suppression processing on the target interference signal in the output signal of the first amplifier 406, so that the CIM3 signal is not generated when the target interference signal passes through other amplifiers, thereby being beneficial to optimizing CIM3, CIM5 and CIM7.

In another possible implementation, the reconfigurable filter 401 in the embodiment of the present application may be disposed between the mixer 405 and the first amplifier 406 (not shown in fig. 6).

In this implementation, after passing through the digital front end DFE 402, the digital baseband signal is converted from digital to analog by the digital-to-analog converter DAC 403, and then the harmonic signal is filtered by the low pass filter LPF 404 to obtain the analog baseband signal BB. Further, the analog baseband signal BB and the local oscillator signal LO generated by the local oscillator are up-converted to a desired target frequency band in the mixer 405 (a target interference signal is generated in this process), and the target interference signal is suppressed by the reconfigurable filter 401, so that the signal input to the first amplifier 406 does not include the target interference signal, so that the first amplifier 406 does not generate the CIM3 signal, and the subsequent CIM3 signal is not generated when passing through other amplifiers, which is beneficial to optimizing the CIM3, CIM5, and CIM7.

In summary, in the embodiment of the present application, by integrating the reconfigurable filter in the radio frequency transceiver, so as to adjust the filter parameter of the reconfigurable filter, so as to flexibly meet the filtering requirement, since no additional matching position is reserved for the veneer, the embodiment of the present application not only can save the area of the veneer, and is beneficial to miniaturization of the electronic device, but also can improve the competitiveness of the radio frequency transceiver.

In an embodiment, on the basis of the above embodiment, in the embodiment of the present application, description is made on relevant content of an electronic device including the radio frequency transceiver provided in the above embodiment of the present application by way of example. Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application, and as shown in fig. 7, the electronic device according to an embodiment of the present application may include a baseband processor 701 and a radio frequency transceiver 702 provided in the foregoing embodiments of the present application.

The baseband processor 701 in the embodiment of the present application may be configured to: acquiring a target frequency band of a target radio frequency signal transmitted by a transmitting link in a radio frequency transceiver; adjusting filter parameters of the reconfigurable filter according to the target frequency band control to filter target interference signals generated in the target radio frequency signal transmitting process; the target interference signal is an interference signal capable of generating a third-order intermodulation signal CIM 3.

Illustratively, in the embodiment of the present application, the baseband processor 701 may receive the target frequency band configured in advance by the network device for the electronic device to send the target radio frequency signal to the network device, or may receive the target frequency band applied in advance by the network device for sending the target radio frequency signal to the network device. Of course, the baseband processor 701 may acquire the target frequency band in other manners.

Further, the baseband processor 701 may control the reconfigurable filter to adjust the filter parameters according to the target frequency band, so as to adjust the frequency band of the radio frequency signal allowed to pass through by the reconfigurable filter, so that the reconfigurable filter may allow the target radio frequency signal to pass through and inhibit the target interference signal from passing through, so as to filter the target interference signal generated in the transmitting process of the target radio frequency signal, thereby achieving the purpose of optimizing the CIM3, and further optimizing the CIM5 and the CIM7.

Illustratively, the filter parameters in embodiments of the present application may include: the capacitance value of the capacitor in the reconfigurable filter and/or the inductance value of the inductor in the reconfigurable filter.

Still another exemplary, the filter parameters in the embodiments of the present application may include: the capacitance value of the capacitor in the reconfigurable filter and/or the resistance value of the resistor in the reconfigurable filter.

In summary, in this embodiment of the present application, by providing the reconfigurable filter in the transmitting link of the radio frequency transceiver, and controlling the mode that the reconfigurable filter adjusts the filter parameters according to the target frequency band of the target radio frequency signal transmitted by the transmitting link in the radio frequency transceiver by using the baseband processor, the target interference signal (the interference signal capable of generating the third-order intermodulation signal CIM 3) generated in the transmitting process of the target radio frequency signal can be filtered, so that the purpose of optimizing CIM3 can be achieved without reserving a matching position on a board, and thereby CIM5 and CIM7 can be optimized to meet the air interface index, which is beneficial to improving the test efficiency of the air interface index. Therefore, the electronic equipment provided by the embodiment of the application can save the single board area and is beneficial to improving the testing efficiency of the air interface index on the basis of meeting the air interface index.

In an embodiment, on the basis of the foregoing embodiment, the description is given in the embodiment of the present application on the related content that the baseband processor 701 adjusts the filter parameters according to the target frequency band control reconfigurable filter.

In a possible implementation, the baseband processor 701 is configured to: determining a frequency range to which a target frequency band belongs, and determining a target filter parameter corresponding to the frequency range; the reconfigurable filter is controlled to adjust the filter parameters to target filter parameters.

In this implementation manner, the baseband processor 701 may determine the frequency band range to which the target frequency band belongs (or referred to as the target preset frequency band range) by matching the target frequency band with different preset frequency band ranges. Further, the baseband processor 701 may determine the target filter parameter corresponding to the frequency band range by querying the corresponding relationship between the preset frequency band range and the filter parameter according to the frequency band range to which the target frequency band belongs. The corresponding relation between the preset frequency range and the filter parameters comprises corresponding relations between different preset frequency ranges and corresponding filter parameters.

For example, assume that different preset frequency band ranges may include: if the baseband processor 701 matches the target frequency Band with a different preset frequency Band range to determine that the frequency Band range to which the target frequency Band belongs is the preset Middle frequency Band MB range, the baseband processor 701 may use a filter parameter (or referred to as an embedded filter parameter) corresponding to the preset Middle frequency Band MB range in the correspondence between the preset frequency Band range and the filter parameter as the target filter parameter.

Further, the baseband processor 701 may control the reconfigurable filter to adjust the filter parameters to target filter parameters, so as to adjust the frequency band of the radio frequency signal allowed to pass through by the reconfigurable filter, so as to filter the target interference signal generated in the transmitting process of the target radio frequency signal, and achieve the purpose of optimizing the CIM3, CIM5 and CIM 7.

Therefore, in the embodiment of the application, the baseband processor can quickly determine the target filter parameters by determining the target filter parameters corresponding to the frequency range to which the target frequency band belongs and controlling the reconfigurable filter to adjust the filter parameters to the target filter parameters, so that the reconfigurable filter can be quickly controlled to adjust the filter parameters, and therefore, the optimization efficiency of CIM3, CIM5 and CIM7 is improved.

In another possible implementation, the baseband processor 701 is configured to: determining a target filter parameter corresponding to a target frequency band; the reconfigurable filter is controlled to adjust the filter parameters to target filter parameters.

In this implementation manner, the baseband processor 701 may determine the target filter parameter corresponding to the target frequency band by querying the corresponding relationship between the preset frequency band and the filter parameter according to the target frequency band. The corresponding relation between the preset frequency bands and the filter parameters comprises corresponding relations between different preset frequency bands and the corresponding filter parameters.

For example, it is assumed that the correspondence between the preset frequency band and the filter parameter may include: the baseband processor 701 may use the filter parameter 2 corresponding to the preset frequency band 2 in the corresponding relation between the preset frequency band 1 and the corresponding filter parameter 1, the corresponding relation between the preset frequency band 2 and the corresponding filter parameter 2, and … …, and the corresponding relation between the preset frequency band n and the corresponding filter parameter n, where n is an integer greater than 2, if the target frequency band is the preset frequency band 2, as the target filter parameter.

Further, the baseband processor 701 may control the reconfigurable filter to adjust the filter parameters to target filter parameters, so as to adjust the frequency band of the radio frequency signal allowed to pass through by the reconfigurable filter, so as to filter the target interference signal generated in the transmitting process of the target radio frequency signal, and achieve the purpose of optimizing the CIM3, CIM5 and CIM 7.

Therefore, in the embodiment of the application, the baseband processor can more accurately determine the target filter parameters by determining the target filter parameters corresponding to the target frequency band and controlling the mode that the reconfigurable filter adjusts the filter parameters to the target filter parameters, so that the reconfigurable filter can be more accurately controlled to adjust the filter parameters, and therefore, the optimization efficiency of CIM3, CIM5 and CIM7 is improved.

In one embodiment, based on the above embodiment, the following description will be given in the following embodiments of the present application on the relevant content of "the baseband processor 701 is configured to control the reconfigurable filter to adjust the filter parameter to the target filter parameter" in the above embodiment.

In a possible implementation, the baseband processor 701 is configured to: the target filter parameters are saved to a target register for storing the filter parameters of the reconfigurable filter, so that the reconfigurable filter can read the target filter parameters from the target register, and the filter parameters of the reconfigurable filter are adjusted to the target filter parameters.

Illustratively, the reconfigurable filter may read the filter parameters from the target register once every preset time period, or may read the filter parameters from the target register once in the case that a write operation of the target register is detected; of course, the reconfigurable filter may also read the filter parameters from the target register once in other cases.

In this implementation, the baseband processor 701 may store the target filter parameters in a target register for storing the filter parameters of the reconfigurable filter, so that the reconfigurable filter may read the target filter parameters from the target register and adjust the filter parameters of the reconfigurable filter to the target filter parameters. Therefore, the mode of controlling the reconfigurable filter to adjust the filter parameters to the target filter parameters is simpler, which is beneficial to saving the processing resources of the baseband processor.

In another possible implementation, the baseband processor 701 is configured to: and sending a parameter adjustment instruction, wherein the parameter adjustment instruction is used for indicating to adjust the filter parameters of the reconfigurable filter to target filter parameters.

Illustratively, the baseband processor 701 may send a parameter adjustment instruction to the radio frequency transceiver, so that the radio frequency transceiver adjusts the filter parameters of the reconfigurable filter to the target filter parameters according to the parameter adjustment instruction, where the parameter adjustment instruction may carry the target filter parameters.

Still another exemplary embodiment, the baseband processor 701 may send a parameter adjustment instruction to the reconfigurable filter, so that the reconfigurable filter adjusts the filter parameter to the target filter parameter according to the parameter adjustment instruction, where the parameter adjustment instruction may carry the target filter parameter.

Therefore, in the implementation manner, the baseband processor can quickly adjust the filter parameters to the target filter parameters by sending the parameter adjustment instruction, so that the optimization efficiency of the CIM3, the CIM5 and the CIM7 is improved.

In an embodiment, on the basis of the foregoing embodiment, fig. 8 is a schematic structural diagram of an electronic device provided in another embodiment of the present application, and as shown in fig. 8, the electronic device in the embodiment of the present application may further include, but is not limited to: a second amplifier 703, a filter 704 and an antenna 705 connected in this order; wherein an input of the second amplifier 703 may be connected to an output of a transmit chain in the radio frequency transceiver 702.

The output signal of the radio frequency transceiver in this embodiment of the present application may be subjected to power amplification by the second amplifier 703, then filtered again by the filter 704 to obtain a target radio frequency signal, and finally the target radio frequency signal is sent to a network device or other devices through the antenna 705.

Because the output signal of the radio frequency transceiver in the embodiment of the present application has filtered the target interference signal, when the output signal of the radio frequency transceiver passes through the second amplifier 703, the CIM3 signal is not generated, and the CIM5 signal and the CIM7 signal are not generated, that is, the signal quality of the target radio frequency signal obtained in the embodiment of the present application is better, thereby being beneficial to improving the communication quality.

For ease of understanding, in the embodiments of the present application, the transmitting link of the radio frequency transceiver may include a digital front end, a digital-to-analog converter, a low-pass filter, a mixer, a first amplifier, and a reconfigurable filter that are sequentially connected, and the description will be given for exemplary purposes of describing the related contents of the electronic device.

Fig. 9 is a schematic structural diagram of an electronic device according to another embodiment of the present application, as shown in fig. 9, after a digital baseband signal passes through a digital front end DFE, digital to analog signal conversion is performed in a digital to analog converter DAC, and then harmonic signals are filtered by a low pass filter LPF to obtain an analog baseband signal. Further, the analog baseband signal and the local oscillator signal LO generated by the local oscillator are up-converted to a desired target frequency band in the mixer (a target interference signal is generated in the process), and are amplified in the analog domain by the first amplifier, so as to obtain an output signal, where the output signal may include, but is not limited to, the target interference signal. Further, the reconfigurable filter 401 may perform suppression processing on the target interference signal in the output signal of the first amplifier 406, so as to obtain an output signal of the radio frequency transceiver, where the output signal of the radio frequency transceiver does not include the target interference signal.

Further, the output signal of the rf transceiver may be subjected to power amplification by the second amplifier 703, then filtered again by the filter 704 to obtain a target rf signal, and finally the target rf signal is sent to a network device or other devices through the antenna 705. Since the output signal of the rf transceiver does not include the target interference signal, the CIM3 signal is not generated when passing through the second amplifier 703, thereby being beneficial to optimizing CIM3, CIM5, and CIM7.

In one embodiment, fig. 10 is a schematic flow chart of a filtering processing method in one embodiment of the present application, where the embodiment of the present application uses the method to illustrate an electronic device as an example. As shown in fig. 10, the method of the embodiment of the present application may include the following steps:

step S1001, acquiring a target frequency band of a target radio frequency signal transmitted by a transmitting link in a radio frequency transceiver.

Step S1002, controlling the reconfigurable filter according to the target frequency band to adjust the filter parameters so as to filter out the target interference signal generated in the process of transmitting the target radio frequency signal.

The target interference signal is an interference signal capable of generating a third-order intermodulation signal CIM 3.

In one embodiment, controlling the reconfigurable filter to adjust the filter parameters according to the target frequency band includes:

Determining a frequency range to which a target frequency band belongs, and determining a target filter parameter corresponding to the frequency range;

the reconfigurable filter is controlled to adjust the filter parameters to target filter parameters.

In one embodiment, controlling the reconfigurable filter to adjust the filter parameters according to the target frequency band includes:

determining a target filter parameter corresponding to a target frequency band;

the reconfigurable filter is controlled to adjust the filter parameters to target filter parameters.

In one embodiment, controlling the reconfigurable filter to adjust the filter parameters to the target filter parameters includes:

the target filter parameters are saved to a target register for storing the filter parameters of the reconfigurable filter, so that the reconfigurable filter can read the target filter parameters from the target register, and the filter parameters of the reconfigurable filter are adjusted to the target filter parameters.

In one embodiment, controlling the reconfigurable filter to adjust the filter parameters to the target filter parameters includes:

and sending a parameter adjustment instruction, wherein the parameter adjustment instruction is used for indicating to adjust the filter parameters of the reconfigurable filter to target filter parameters.

In one embodiment, the target filter parameters include: the capacitance value of the capacitor in the reconfigurable filter and/or the inductance value of the inductor in the reconfigurable filter.

The related content of the filtering processing method provided in the embodiment of the present application may refer to the technical solution in the embodiment of the electronic device described in the present application, and its implementation principle and technical effect are similar, and are not repeated here.

It should be understood that, although the steps in the flowcharts related to the above embodiments are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.

Based on the same inventive concept, the embodiment of the application also provides a filtering processing device for realizing the filtering processing method. The implementation of the solution provided by the apparatus is similar to the implementation described in the above method, so the specific limitation in the embodiments of the one or more filtering processing apparatuses provided below may refer to the limitation of the filtering processing method hereinabove, and will not be repeated herein.

In an embodiment, fig. 11 is a schematic structural diagram of a filtering processing device in an embodiment of the present application, where the filtering processing device provided in the embodiment of the present application may be applied to an electronic device. As shown in fig. 11, the filtering processing apparatus of the embodiment of the present application may include: an acquisition module 1101 and an adjustment module 1102.

Wherein, the obtaining module 1101 is configured to obtain a target frequency band of a target radio frequency signal transmitted by a transmitting link in the radio frequency transceiver;

the adjusting module 1102 is configured to control the reconfigurable filter to adjust the filter parameters according to the target frequency band so as to filter out the target interference signal generated in the process of transmitting the target radio frequency signal;

the target interference signal is an interference signal capable of generating a third-order intermodulation signal CIM 3.

In one embodiment, the adjustment module 1102 includes:

a first determining unit configured to determine a frequency band range to which a target frequency band belongs, and determine a target filter parameter corresponding to the frequency band range;

and an adjustment unit configured to control the reconfigurable filter to adjust the filter parameter to a target filter parameter.

In one embodiment, the adjustment module 1102 includes:

a second determination unit configured to determine a target filter parameter corresponding to a target frequency band;

And an adjustment unit configured to control the reconfigurable filter to adjust the filter parameter to a target filter parameter.

In one embodiment, the adjustment unit is configured to:

the target filter parameters are saved to a target register for storing the filter parameters of the reconfigurable filter, so that the reconfigurable filter can read the target filter parameters from the target register, and the filter parameters of the reconfigurable filter are adjusted to the target filter parameters.

In one embodiment, the adjustment unit is configured to:

and sending a parameter adjustment instruction, wherein the parameter adjustment instruction is used for indicating to adjust the filter parameters of the reconfigurable filter to target filter parameters.

In one embodiment, the target filter parameters include: the capacitance value of the capacitor in the reconfigurable filter and/or the inductance value of the inductor in the reconfigurable filter.

The filtering processing device provided in the embodiment of the present application may be used to execute the technical scheme in the embodiment of the filtering processing method of the present application, and its implementation principle and technical effect are similar, and are not repeated here.

The respective modules in the above-described filter processing apparatus may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or independent of a processor in the electronic device, or may be stored in software in a memory in the electronic device, so that the processor may call and execute operations corresponding to the above modules.

In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, where the computer program when executed by a processor implements the technical solution in the foregoing embodiments of the filtering processing method of the present application, and the implementation principle and technical effect are similar, and are not repeated herein.

In one embodiment, a computer program product is provided, which includes a computer program, where the computer program when executed by a processor implements the technical solution in the foregoing embodiments of the filtering processing method of the present application, and the implementation principle and technical effects are similar, and are not repeated herein.

Those skilled in the art will appreciate that implementing all or part of the above-described methods may be accomplished by way of a computer program, which may be stored on a non-transitory computer readable storage medium and which, when executed, may comprise the steps of the above-described embodiments of the methods. Any reference to memory or other medium used in the various embodiments provided herein can include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The processors referred to in the embodiments provided herein may be, but are not limited to, general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic units, quantum computing-based data processing logic units, baseband processors, and the like.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not thereby to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.

Claims (19)

1. A radio frequency transceiver, the radio frequency transceiver comprising a transmit chain; a reconfigurable filter is arranged in the transmitting link;

the filter parameters of the reconfigurable filter can be configured to adjust based on a target frequency band of a target radio frequency signal transmitted by the transmitting link so as to filter out a target interference signal generated in the transmitting process of the target radio frequency signal;

The target interference signal is an interference signal capable of generating a third-order intermodulation signal CIM 3.

2. The radio frequency transceiver of claim 1, wherein the filter parameters comprise: the capacitance value of the capacitor in the reconfigurable filter and/or the inductance value of the inductor in the reconfigurable filter.

3. The radio frequency transceiver of claim 1 or 2, wherein the transmit chain further comprises a digital front end, a digital-to-analog converter, a low pass filter, a mixer, and a first amplifier connected in sequence.

4. The radio frequency transceiver of claim 3, wherein the reconfigurable filter is disposed between the mixer and the first amplifier; or,

the input end of the reconfigurable filter is connected with the output end of the first amplifier.

5. The radio frequency transceiver of any one of claims 1-4, wherein the reconfigurable filter is a low-pass reconfigurable filter.

6. The radio frequency transceiver of any one of claims 1-4, wherein the target interference signal comprises a 3LO-BB signal, where LO stands for local oscillator signal and BB stands for baseband signal.

7. An electronic device comprising a baseband processor and a radio frequency transceiver as claimed in any one of claims 1-6;

wherein the baseband processor is configured to:

acquiring a target frequency band of a target radio frequency signal transmitted by a transmitting link in the radio frequency transceiver;

controlling the reconfigurable filter to adjust filter parameters according to the target frequency band so as to filter out a target interference signal generated in the process of transmitting the target radio frequency signal;

the target interference signal is an interference signal capable of generating a third-order intermodulation signal CIM 3.

8. The electronic device of claim 7, wherein the baseband processor is configured to:

determining a frequency band range to which the target frequency band belongs, and determining a target filter parameter corresponding to the frequency band range;

the reconfigurable filter is controlled to adjust filter parameters to the target filter parameters.

9. The electronic device of claim 7, wherein the baseband processor is configured to:

determining a target filter parameter corresponding to the target frequency band;

the reconfigurable filter is controlled to adjust filter parameters to the target filter parameters.

10. The electronic device of claim 8 or 9, wherein the baseband processor is configured to:

and storing the target filter parameters into a target register for storing the filter parameters of the reconfigurable filter, so that the reconfigurable filter can read the target filter parameters from the target register, and adjusting the filter parameters of the reconfigurable filter into the target filter parameters.

11. The electronic device of claim 8 or 9, wherein the baseband processor is configured to:

and sending a parameter adjustment instruction, wherein the parameter adjustment instruction is used for indicating to adjust the filter parameters of the reconfigurable filter to the target filter parameters.

12. The electronic device of any of claims 7-9, wherein the filter parameters include: the capacitance value of the capacitor in the reconfigurable filter and/or the inductance value of the inductor in the reconfigurable filter.

13. The electronic device of any one of claims 7-9, wherein the electronic device further comprises: the second amplifier, the filter and the antenna are connected in sequence, wherein the input end of the second amplifier is connected with the output end of the transmitting link.

14. A filtering processing method, characterized in that the method is applied to the electronic device according to any one of claims 7 to 13; the method comprises the following steps:

acquiring a target frequency band of a target radio frequency signal transmitted by a transmitting link in a radio frequency transceiver;

controlling the reconfigurable filter to adjust filter parameters according to the target frequency band so as to filter out a target interference signal generated in the process of transmitting the target radio frequency signal;

the target interference signal is an interference signal capable of generating a third-order intermodulation signal CIM 3.

15. The method of claim 14, wherein said controlling the reconfigurable filter to adjust filter parameters according to the target frequency band comprises:

determining a frequency band range to which the target frequency band belongs, and determining a target filter parameter corresponding to the frequency band range;

the reconfigurable filter is controlled to adjust filter parameters to the target filter parameters.

16. The method of claim 14, wherein said controlling the reconfigurable filter to adjust filter parameters according to the target frequency band comprises:

determining a target filter parameter corresponding to the target frequency band;

The reconfigurable filter is controlled to adjust filter parameters to the target filter parameters.

17. The method according to claim 15 or 16, wherein said controlling the reconfigurable filter to adjust filter parameters to the target filter parameters comprises:

and storing the target filter parameters into a target register for storing the filter parameters of the reconfigurable filter, so that the reconfigurable filter can read the target filter parameters from the target register, and adjusting the filter parameters of the reconfigurable filter into the target filter parameters.

18. The method according to claim 15 or 16, wherein said controlling the reconfigurable filter to adjust filter parameters to the target filter parameters comprises:

and sending a parameter adjustment instruction, wherein the parameter adjustment instruction is used for indicating to adjust the filter parameters of the reconfigurable filter to the target filter parameters.

19. The method according to any one of claims 14-16, wherein the target filter parameters comprise: the capacitance value of the capacitor in the reconfigurable filter and/or the inductance value of the inductor in the reconfigurable filter.