CN106936468B - Signal processing method and device - Google Patents
Signal processing method and device Download PDFInfo
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- CN106936468B CN106936468B CN201710120989.3A CN201710120989A CN106936468B CN 106936468 B CN106936468 B CN 106936468B CN 201710120989 A CN201710120989 A CN 201710120989A CN 106936468 B CN106936468 B CN 106936468B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1081—Reduction of multipath noise
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Abstract
The present disclosure relates to a signal processing method and apparatus. The signal processing method is applied to a mobile terminal with a transmitting antenna and a receiving antenna, and comprises the following steps: dividing a transmission signal into a first transmission signal and a second transmission signal which are equal in power and opposite in phase; transmitting the first signal through the transmit antenna; and superposing the receiving signal received by the receiving antenna and the second signal and inputting the superposed signal into a receiving link. The transmitting signal is divided into the first transmitting signal and the second transmitting signal which are equal in power and opposite in phase, the receiving signal and the second signal are superposed and then input into the receiving link, the self-interference signal coupled with the communication link when the mobile terminal is communicated with the outside is eliminated, the convergence speed of the used cancellation signal, namely the second signal is accelerated, the adjusting speed of the communication system is accelerated, the influence of the self-interference signal on the communication system is reduced, and the signal-to-noise ratio of a channel is improved.
Description
Technical Field
The present disclosure relates to the field of communications, and in particular, to a signal processing method and apparatus.
Background
In the related art, noise is coupled into a communication link (a transmitting antenna and a receiving antenna) of a mobile device during signal transmission to form an interference signal, and in order to eliminate the interference signal, a filter is usually used to filter noise outside a pass band. However, if the communication link couples the signal transmitted by itself, the interference signal is in the same frequency band as the useful signal, and the filter and other signal processing means cannot solve the problem of signal interference.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a signal processing method and apparatus.
According to a first aspect of the embodiments of the present disclosure, there is provided a signal processing method applied to a mobile terminal having a transmitting antenna and a receiving antenna, where a balun is disposed in a transmitting link of the mobile terminal, the signal processing method including:
dividing a transmission signal into a first transmission signal and a second transmission signal which are equal in power and opposite in phase;
transmitting the first signal through the transmit antenna;
superposing the receiving signal received by the receiving antenna and the second signal and inputting the superposed signal into a receiving link;
the dividing of the transmission signal into a first transmission signal and a second transmission signal with equal power and opposite phases includes:
inputting a transmission signal in the transmission link into an input end of the balun so that a first differential end and a second differential end of the balun output the first transmission signal and the second transmission signal respectively;
the second differential end of the balun is connected to an attenuator, and a combiner connected to the attenuator is arranged in the receiving link;
the superimposing the received signal received by the receiving antenna and the second signal and inputting the superimposed signal into a receiving link includes:
inputting the second signal into the attenuator to attenuate the second signal according to a target attenuation proportion;
inputting the attenuated second signal and the reception signal into the combiner;
determining the target attenuation proportion;
the number of different attenuation proportions of the attenuator is M;
the determining the target attenuation ratio comprises:
controlling the attenuator to sequentially attenuate the second signal at M different attenuation ratios;
sequentially inputting the M attenuated second signals with different attenuation ratios into the combiner, so that the received signals and the M second signals are sequentially superposed to output M output signals;
converting the M output signals into corresponding direct-current voltage value signals;
and acquiring a target direct-current voltage value signal with the minimum direct-current voltage value, wherein the attenuation proportion corresponding to the target direct-current voltage value signal is the target attenuation proportion.
According to a second aspect of the embodiments of the present disclosure, there is provided a signal processing apparatus applied to a mobile terminal having a transmitting antenna and a receiving antenna, a balun is disposed in a transmitting chain of the mobile terminal, the signal processing apparatus includes:
a processing module configured to divide a transmission signal into a first transmission signal and a second transmission signal with equal power and opposite phases;
a transmitting module configured to transmit the first signal through the transmitting antenna;
the execution module is configured to input a receiving signal received by the receiving antenna and the second signal after being superposed into a receiving link;
the processing module is configured to input a transmission signal in the transmission chain into an input terminal of the balun so that a first differential terminal and a second differential terminal of the balun output the first transmission signal and the second transmission signal, respectively;
the second differential end of the balun is connected to an attenuator, and a combiner connected to the attenuator is arranged in the receiving link;
the execution module comprises:
a first input submodule configured to input the second signal into the attenuator to attenuate the second signal by a target attenuation ratio;
a second input sub-module configured to input the attenuated second signal and the reception signal into the combiner;
a determination module configured to determine the target attenuation ratio;
the number of different attenuation proportions of the attenuator is M; the determining module comprises:
a control sub-module configured to control the attenuator to sequentially attenuate the second signal at M different attenuation ratios;
a third input submodule configured to sequentially input the M second signals attenuated at different attenuation ratios into the combiner, so that the M output signals are output after the reception signal and the M second signals are sequentially superimposed;
a conversion submodule configured to convert the M output signals into corresponding direct voltage value signals;
the obtaining submodule is configured to obtain a target direct-current voltage value signal with a minimum direct-current voltage value, and an attenuation proportion corresponding to the target direct-current voltage value signal is the target attenuation proportion.
According to a third aspect of the embodiments of the present disclosure, there is provided a signal processing apparatus including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
dividing a transmission signal into a first transmission signal and a second transmission signal which are equal in power and opposite in phase;
a transmitting antenna transmits the first signal;
superposing a receiving signal received by a receiving antenna and the second signal and inputting the superposed signal into a receiving link;
wherein, the dividing the transmission signal into a first transmission signal and a second transmission signal with equal power and opposite phases comprises: inputting a transmission signal in the transmission link into an input end of the balun so that a first differential end and a second differential end of the balun output the first transmission signal and the second transmission signal respectively;
the second differential end of the balun is connected to an attenuator, and a combiner connected to the attenuator is arranged in the receiving link;
the superimposing the received signal received by the receiving antenna and the second signal and inputting the superimposed signal into a receiving link includes: inputting the second signal into the attenuator to attenuate the second signal according to a target attenuation proportion; inputting the attenuated second signal and the reception signal into the combiner;
determining the target attenuation proportion; the number of different attenuation proportions of the attenuator is M; the determining the target attenuation ratio comprises: controlling the attenuator to sequentially attenuate the second signal at M different attenuation ratios; sequentially inputting the M attenuated second signals with different attenuation ratios into the combiner, so that the received signals and the M second signals are sequentially superposed to output M output signals; converting the M output signals into corresponding direct-current voltage value signals; and acquiring a target direct-current voltage value signal with the minimum direct-current voltage value, wherein the attenuation proportion corresponding to the target direct-current voltage value signal is the target attenuation proportion.
According to a fourth aspect of embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium having instructions therein, which when executed by a processor of a mobile terminal, enable the mobile terminal to perform a signal processing method, the method comprising:
dividing a transmission signal into a first transmission signal and a second transmission signal which are equal in power and opposite in phase;
a transmitting antenna transmits the first signal;
superposing a receiving signal received by a receiving antenna and the second signal and inputting the superposed signal into a receiving link;
wherein, the dividing the transmission signal into a first transmission signal and a second transmission signal with equal power and opposite phases comprises: inputting a transmission signal in the transmission link into an input end of the balun so that a first differential end and a second differential end of the balun output the first transmission signal and the second transmission signal respectively;
the second differential end of the balun is connected to an attenuator, and a combiner connected to the attenuator is arranged in the receiving link;
the superimposing the received signal received by the receiving antenna and the second signal and inputting the superimposed signal into a receiving link includes: inputting the second signal into the attenuator to attenuate the second signal according to a target attenuation proportion; inputting the attenuated second signal and the reception signal into the combiner;
determining the target attenuation proportion; the number of different attenuation proportions of the attenuator is M; the determining the target attenuation ratio comprises: controlling the attenuator to sequentially attenuate the second signal at M different attenuation ratios; sequentially inputting the M attenuated second signals with different attenuation ratios into the combiner, so that the received signals and the M second signals are sequentially superposed to output M output signals; converting the M output signals into corresponding direct-current voltage value signals; and acquiring a target direct-current voltage value signal with the minimum direct-current voltage value, wherein the attenuation proportion corresponding to the target direct-current voltage value signal is the target attenuation proportion.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
dividing a transmitting signal into a first transmitting signal and a second transmitting signal which have equal power and opposite phases, superposing a receiving signal and the second signal and inputting the superposed signals into a receiving link, eliminating a self-interference signal coupled by the communication link when a mobile terminal is communicated with the outside, accelerating the convergence speed of a used cancellation signal, namely the second signal, accelerating the adjustment speed of a communication system, reducing the influence of the self-interference signal on the communication system and improving the signal-to-noise ratio of a channel.
Secondly, determining a target attenuation proportion of the attenuator through a digital self-adaptive traversal adjustment process, further attenuating a second signal according to the target attenuation proportion, and inputting the attenuated second signal and a received signal into a combiner, so that a self-interference signal is eliminated, the design complexity and time complexity of a communication system are reduced, the time overhead of an interference signal elimination algorithm is reduced, and a signal rapid adjustment scheme is provided for eliminating noise interference of a mobile terminal.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a flow chart illustrating a method of signal processing according to an example embodiment.
Fig. 2 is another flow chart illustrating a method of signal processing according to an example embodiment.
Fig. 3 is a flow chart illustrating a signal processing method according to an exemplary embodiment including steps of inputting a reception signal into a reception chain with a second signal.
Fig. 4 is another flow chart illustrating a method of signal processing according to an example embodiment.
Fig. 5 is a flow chart illustrating a method of signal processing including steps for determining a target attenuation ratio according to an exemplary embodiment.
Fig. 6 is a block diagram illustrating a signal processing apparatus according to an example embodiment.
Fig. 7 is a block diagram illustrating execution blocks of a signal processing apparatus according to an exemplary embodiment.
Fig. 8 is another block diagram illustrating a signal processing apparatus according to an example embodiment.
Fig. 9 is a block diagram illustrating a determination module of a signal processing apparatus according to an example embodiment.
Fig. 10 is a block diagram illustrating a signal processing apparatus according to an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Fig. 1 is a flowchart illustrating a signal processing method according to an exemplary embodiment, which is applied to a mobile terminal having a transmitting antenna and a receiving antenna, as shown in fig. 1, and includes the following steps.
In step S11, the transmission signal is divided into a first transmission signal and a second transmission signal with equal power and opposite phases.
In step S12, the first signal is transmitted through the transmitting antenna.
In step S13, the received signal received by the receiving antenna is superimposed with the second signal and input into the receiving chain.
The mobile terminal in the present disclosure may be a smartphone, a smart watch, a smart bracelet, a tablet computer, or the like. The mobile terminal comprises a transmitting antenna and a receiving antenna, wherein the transmitting antenna is connected to a transmitting link, and the receiving antenna is connected to a receiving link. When the mobile terminal needs to transmit a signal, the signal is transmitted to the transmitting antenna through a transmitting link in the mobile terminal, so that the transmitting antenna transmits the signal. The receiving antenna receives the signal and inputs the received signal to a receiving chain.
First, in step S11, the transmission signal is divided into a first transmission signal and a second transmission signal having equal power and opposite phases. The transmitted signal may be a signal generated by a user operating the mobile terminal, for example, when the user dials a contact number using a smart phone. The transmission signal may be a signal generated by the mobile terminal in a non-user operation, for example, when an APP installed on a smartphone needs to send data in the background.
After the transmission signal is generated, the transmission signal is divided into a first transmission signal and a second transmission signal with equal power and opposite phases, and then step S12 is executed to transmit the first signal through the transmission antenna. Namely, after the first transmission signal is transmitted, a second transmission signal with the phase difference of 180 degrees with the first transmission signal is reserved in the mobile terminal.
Then, S13 is executed, and the received signal received by the receiving antenna is superimposed with the second signal and input to the receiving chain. When the receiving link has a self-interference signal, that is, the receiving link is coupled with the first transmit signal, since the second signal and the self-interference signal have equal power and opposite phases, the second signal can be canceled by the self-interference signal, and the influence of the self-interference signal on the communication system is reduced.
For example, when a user uses a smart phone to communicate with a target user, the smart phone takes voice information of the user as a transmission signal, and before the transmission signal is transmitted, the smart phone divides the transmission signal into a first transmission signal and a second transmission signal which have equal power and opposite phases; then sending the first transmitting signal to the target user; then, when the smart phone receives a receiving signal sent by the mobile phone of the target user, the smart phone of the user inputs the receiving signal and a second signal into the receiving link after superimposing the receiving signal and the second signal, so that when a self-interference signal exists in the receiving link, the self-interference signal can be eliminated by the second signal, and the user can also hear the sound of the target user more clearly.
According to the method and the device, the transmitting signal is divided into the first transmitting signal and the second transmitting signal which are equal in power and opposite in phase, the receiving signal and the second signal are superposed and then input into the receiving link, the self-interference signal coupled with the communication link when the mobile terminal is communicated with the outside is eliminated, the convergence speed of the used cancellation signal, namely the second signal is accelerated, the adjusting speed of the communication system is accelerated, the influence of the self-interference signal on the communication system is reduced, and the signal-to-noise ratio of a channel is improved.
Fig. 2 is another flow chart illustrating a method of signal processing according to an example embodiment. As shown in fig. 2, a balun is disposed in a transmitting chain of a mobile terminal, and the signal processing method is applied to a mobile terminal having a transmitting antenna and a receiving antenna, and includes the following steps.
In step S21, a transmission signal in the transmission chain is input to an input terminal of the balun, so that the first differential terminal and the second differential terminal of the balun output a first transmission signal and a second transmission signal, respectively.
In step S22, the first signal is transmitted through the transmitting antenna.
In step S23, the received signal received by the receiving antenna is superimposed with the second signal and input into the receiving chain.
Balun isA single-ended signal to double-ended signal power diversity device. The balun has three ports, including an input port, two differential ports (i.e. a first differential port and a second differential port), and impedance values of the input port and the differential ports may not be equal, but impedance values of the two differential ports must be equal, so as to implement an input and output impedance transformation function. A system architecture for suppressing signal interference in a mobile terminal communication link by using a balun is disclosed, wherein a baseband signal is modulated to a radio frequency domain carrier to form a transmitting signal SINAfter the power diversity of balun linear transformation, equally dividing into the first transmitting signals S with equal amplitude and opposite phaseOUT1And a second transmission signal SOUT2The formula is as follows:
wherein the first transmission signal SOUT1And a second transmission signal SOUT2All amplitudes are
First transmission signal SOUT1A second transmission signal S is transmitted into space by the transmitting antennaOUT2The received signal is superposed and then enters a receiving link because the phase difference isThe time overhead of phase adjustment is saved, and the signal convergence rate is accelerated.
Optionally, fig. 3 is a flowchart illustrating a signal processing method according to an exemplary embodiment, where the signal processing method includes a step of inputting a received signal and a second signal into a receiving chain, as shown in fig. 3, a second differential end of the balun is connected to an attenuator, and a combiner connected to the attenuator is disposed in the receiving chain. The step of inputting the received signal received by the receiving antenna and the second signal after being superposed into a receiving link comprises the following steps.
In step S231, the second signal is input into the attenuator to attenuate the second signal according to a target attenuation ratio.
In step S232, the attenuated second signal and the reception signal are input into the combiner.
When the transmission signal SINIs divided into a first transmission signal S by a balunOUT1And a second transmission signal SOUT2Then, the first transmission signal SOUT1The self-interference signal is formed by the transmitting antenna after being transmitted to the space and then received by the receiving antenna, and the process is attenuated, so that the second transmitting signal S which is canceled with the self-interference signalOUT2Needs to be attenuated into a signal S according to a target attenuation proportion by an attenuatorcancel，ScancelFirst transmission signal S received by receiving antennaOUT1The signals belong to the same frequency band on the frequency spectrum, and the signals can be offset after being superposed in the combiner, namely, the self-interference signals can be eliminated.
Fig. 4 is another flow chart illustrating a method of signal processing according to an example embodiment. As shown in fig. 4, the signal processing method is applied to a mobile terminal having a transmitting antenna and a receiving antenna, and includes the following steps.
In step S41, a transmission signal in the transmission chain is input to the input terminal of the balun, so that the first differential terminal and the second differential terminal of the balun output the first transmission signal and the second transmission signal, respectively.
In step S42, the first signal is transmitted through the transmitting antenna.
In step S43, the target attenuation ratio is determined.
In step S44, the second signal is input into the attenuator to attenuate the second signal by a target attenuation ratio.
In step S45, the attenuated second signal and the reception signal are input into the combiner.
In order to determine the target attenuation ratio, as shown in fig. 5, the determining the target attenuation ratio includes the following steps.
In step S431, the attenuator is controlled to sequentially attenuate the second signal at M different attenuation ratios.
In step S432, the M attenuated second signals with different attenuation ratios are sequentially input into the combiner, so that the M output signals are output after the received signal and the M second signals are sequentially superimposed.
In step S433, the M output signals are converted into corresponding dc voltage value signals.
In step S434, a target dc voltage value signal with the minimum dc voltage value is obtained, and the attenuation ratio corresponding to the target dc voltage value signal is the standard attenuation ratio.
The number of different attenuation ratios of the attenuator is M, wherein M is related to the number of dial switches N of the attenuator, and M is 2N. For example, the attenuator has six dial switches controlling different attenuation levels, and thus has a total of 26I.e. there are 64 different attenuation ratios.
For example, when the transmission signal S isINIs divided into a first transmission signal S by a balunOUT1And a second transmission signal SOUT2Then, the first transmission signal SOUT1Transmitted into space by means of a transmitting antenna, a second transmission signal SOUT2After passing through the attenuator, the signals are attenuated into different signals S according to different attenuation ratioscancelDifferent ScancelA first transmission signal S received by the receiving antenna in turnOUT1After being superposed in the combiner, the signals can be transmitted to a detector to realize the conversion of signal power into different direct-current voltage value signals SvoltageDifferent DC voltage value signal S that the processor can gathervoltageAnd storing the data. Assuming that the attenuator has six dip switches, the processor can control the signal S by outputting 6-bit digital '0', '1' dip switch control signalsDijitalThe on-off of six dial switches of the attenuator is adjusted to respectively control different weights (0.5dB, 1dB, 2dB, 4dB, 8dB and 16dB) to realize different attenuation ratios, and the processor controls the dial switches to realize 2 total of 000000-1111116Traversing different combinations once, and respectively corresponding to different DC voltage signals SvoltageThen is processedDevice 26A different DC voltage signal SvoltageIn the method, the dial switch control signal S corresponding to the minimum value is selectedDijitalAt this time, the corresponding dial switch control signal SDijitalThat is, the target attenuation ratio of the attenuator, i.e., the dial switch control signal S corresponding to the minimum valueDijitalIt is the best value for controlling and eliminating self-interference signals in the analog domain of the communication link.
The target attenuation proportion of the attenuator is determined through a digital self-adaptive traversal adjustment process, a second signal is attenuated according to the target attenuation proportion, and the attenuated second signal and a received signal are input into a combiner, so that a self-interference signal is eliminated, the design complexity and time complexity of a communication system are reduced, the time overhead of an interference signal elimination algorithm is reduced, and a signal rapid adjustment scheme is provided for eliminating noise interference of a mobile terminal.
Fig. 6 is a block diagram illustrating a signal processing apparatus according to an example embodiment. Referring to fig. 6, the signal processing apparatus 600 is applied to a mobile terminal having a transmitting antenna and a receiving antenna, and includes a processing module 610, a transmitting module 620 and an executing module 630.
The processing module 610 is configured to split the transmit signal into a first transmit signal and a second transmit signal that are equal in power and opposite in phase.
The transmitting module 620 is configured to transmit the first signal through the transmitting antenna.
The executing module 630 is configured to superimpose the receiving signal received by the receiving antenna and the second signal and input the superimposed signal into a receiving chain.
Optionally, a balun is arranged in a transmission link of the mobile terminal; the processing module 610 is configured to input a transmission signal in the transmission chain into an input terminal of the balun, so that a first differential terminal and a second differential terminal of the balun output the first transmission signal and the second transmission signal, respectively.
Optionally, as shown in fig. 7, the second differential end of the balun is connected to an attenuator, and a combiner connected to the attenuator is disposed in the receiving link; the executing module 630 includes:
a first input sub-module 631 configured to input the second signal into the attenuator to attenuate the second signal by a target attenuation ratio;
a second input sub-module 632 configured to input the attenuated second signal and the reception signal into the combiner.
Optionally, as shown in fig. 8, the signal processing apparatus 600 includes, in addition to the processing module 610, the transmitting module 620 and the executing module 630: a determination module 640 configured to determine the target attenuation ratio.
Alternatively, as shown in fig. 9, the number of different attenuation ratios of the attenuator is M; the determining module 640 includes:
a control sub-module 641 configured to control the attenuator to sequentially attenuate the second signal at M different attenuation ratios;
a third input submodule 642 configured to sequentially input the M second signals attenuated at different attenuation ratios into the combiner, so that the M output signals are output after the received signal and the M second signals are sequentially superimposed;
a conversion submodule 643, configured to convert the M output signals into corresponding direct-current voltage value signals;
the obtaining submodule 644 is configured to obtain a target dc voltage value signal with a minimum dc voltage value, where an attenuation ratio corresponding to the target dc voltage value signal is the standard attenuation ratio.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 10 is a block diagram illustrating an apparatus 800 for signal processing according to an example embodiment. For example, the apparatus 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.
Referring to fig. 10, the apparatus 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.
The processing component 802 generally controls overall operation of the device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the signal processing methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.
The memory 804 is configured to store various types of data to support operations at the apparatus 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The multimedia component 808 includes a screen that provides an output interface between the device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.
The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the device 800. For example, the sensor assembly 814 may detect the open/closed status of the device 800, the relative positioning of components, such as a display and keypad of the device 800, the sensor assembly 814 may also detect a change in the position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration/deceleration of the device 800, and a change in the temperature of the device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 816 is configured to facilitate communications between the apparatus 800 and other devices in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described signal processing methods.
In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the apparatus 800 to perform the signal processing method described above is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (4)
1. A signal processing method is applied to a mobile terminal with a transmitting antenna and a receiving antenna, and is characterized in that a balun is arranged in a transmitting link of the mobile terminal, and the signal processing method comprises the following steps:
dividing a transmission signal into a first transmission signal and a second transmission signal which are equal in power and opposite in phase;
transmitting the first transmission signal through the transmission antenna;
superposing the receiving signal received by the receiving antenna and the second transmitting signal and inputting the superposed signal into a receiving link;
wherein, the dividing the transmission signal into a first transmission signal and a second transmission signal with equal power and opposite phases comprises: inputting a transmission signal in the transmission link into an input end of the balun so that a first differential end and a second differential end of the balun output the first transmission signal and the second transmission signal respectively;
the second differential end of the balun is connected to an attenuator, and a combiner connected to the attenuator is arranged in the receiving link;
the superimposing the receiving signal received by the receiving antenna and the second transmitting signal and inputting the superimposed receiving signal into a receiving link includes: inputting the second transmission signal into the attenuator to attenuate the second transmission signal according to a target attenuation proportion; inputting the attenuated second transmitting signal and the attenuated receiving signal into the combiner;
determining the target attenuation proportion; the number of different attenuation proportions of the attenuator is M; the determining the target attenuation ratio comprises: controlling the attenuator to sequentially attenuate the second transmitting signal by M different attenuation ratios; sequentially inputting the M attenuated second transmitting signals with different attenuation ratios into the combiner, so that the receiving signals and the M second transmitting signals are sequentially superposed to output M output signals; converting the M output signals into corresponding direct-current voltage value signals; and acquiring a target direct-current voltage value signal with the minimum direct-current voltage value, wherein the attenuation proportion corresponding to the target direct-current voltage value signal is the target attenuation proportion.
2. A signal processing apparatus applied to a mobile terminal having a transmitting antenna and a receiving antenna, wherein a balun is disposed in a transmitting chain of the mobile terminal, the signal processing apparatus comprising:
a processing module configured to divide a transmission signal into a first transmission signal and a second transmission signal with equal power and opposite phases;
a transmitting module configured to transmit the first transmission signal through the transmitting antenna;
the execution module is configured to input a receiving signal received by the receiving antenna and the second transmitting signal after being superposed into a receiving link;
wherein the processing module is configured to input a transmission signal in the transmission chain into an input terminal of the balun so that a first differential terminal and a second differential terminal of the balun output the first transmission signal and the second transmission signal, respectively; the second differential end of the balun is connected to an attenuator, and a combiner connected to the attenuator is arranged in the receiving link;
the execution module comprises: a first input submodule configured to input the second transmission signal into the attenuator to attenuate the second transmission signal by a target attenuation ratio; a second input sub-module configured to input the attenuated second transmit signal and the receive signal into the combiner;
a determination module configured to determine the target attenuation ratio;
the number of different attenuation proportions of the attenuator is M; the determining module comprises:
a control sub-module configured to control the attenuator to sequentially attenuate the second transmit signal at M different attenuation ratios; a third input sub-module, configured to sequentially input the M second transmission signals attenuated at different attenuation ratios into the combiner, so that the M output signals are output after the reception signal and the M second transmission signals are sequentially superimposed; a conversion submodule configured to convert the M output signals into corresponding direct voltage value signals; the obtaining submodule is configured to obtain a target direct-current voltage value signal with a minimum direct-current voltage value, and an attenuation proportion corresponding to the target direct-current voltage value signal is the target attenuation proportion.
3. A signal processing apparatus, characterized by comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
dividing the transmission signal into a first transmission signal and a second transmission signal which have equal power and opposite phases;
transmitting the first transmission signal through a transmission antenna;
superposing a receiving signal received by a receiving antenna and the second transmitting signal and inputting the superposed signal into a receiving link;
wherein, the dividing the transmission signal into a first transmission signal and a second transmission signal with equal power and opposite phases comprises: inputting a transmission signal in the transmission link into an input end of a balun so that a first differential end and a second differential end of the balun output the first transmission signal and the second transmission signal respectively;
the second differential end of the balun is connected to an attenuator, and a combiner connected to the attenuator is arranged in the receiving link;
the superimposing the receiving signal received by the receiving antenna and the second transmitting signal and inputting the superimposed receiving signal into a receiving link includes: inputting the second transmission signal into the attenuator to attenuate the second transmission signal according to a target attenuation proportion; inputting the attenuated second transmitting signal and the attenuated receiving signal into the combiner;
determining the target attenuation proportion; the number of different attenuation proportions of the attenuator is M; the determining the target attenuation ratio comprises: controlling the attenuator to sequentially attenuate the second transmitting signal by M different attenuation ratios; sequentially inputting the M attenuated second transmitting signals with different attenuation ratios into the combiner, so that the receiving signals and the M second transmitting signals are sequentially superposed to output M output signals; converting the M output signals into corresponding direct-current voltage value signals; and acquiring a target direct-current voltage value signal with the minimum direct-current voltage value, wherein the attenuation proportion corresponding to the target direct-current voltage value signal is the target attenuation proportion.
4. A computer-readable storage medium, having computer program instructions stored thereon, which, when executed by a processor, implement the steps of the method of claim 1.
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| CN109861702A (en) * | 2017-11-30 | 2019-06-07 | 北京小米移动软件有限公司 | Interfering signal removing method and device |
| CN109034057A (en) * | 2018-07-24 | 2018-12-18 | 维沃移动通信有限公司 | A kind of device, terminal and method reducing imaging interference |
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