Abstract: A compact electronic device has a touch sensor and/or a microphone that are concealed within a housing at least partially wrapped by an acoustically porous cover. In some implementations, the touch sensor includes a sensing portion and a contact portion extending from the sensing portion. While the sensing portion is placed in proximity to an interior surface of the housing to detect a touch on the housing, the contact portion is bent to electrically couple the sensing portion to a circuit board via two distinct electrical paths. In some implementations, an exterior surface of the housing includes a sealing area surrounding an aperture on the housing, and the acoustically porous cover is affixed to the sealing area via an adhesive. The adhesive covers the sealing area and permeates a thickness of the acoustically porous cover, thereby enabling formation of a controlled sound path to access the microphone via the aperture.

Abstract: A method for operating an electronic device comprising a processing unit and a speaker is disclosed. The method comprises the following acts, performed by the processing unit: when detecting that a process implying audio output from the speaker is to be performed, determining (a) that the user is in a quiet environment; and performing (h) the process with a reduced level of audio output from the speaker.

Abstract: Example techniques involve systems with multiple acoustic echo cancellers. An example implementation captures first audio within an acoustic environment and detecting, within the captured first audio content, a wake-word. In response to the wake-word and before playing an acknowledgement tone, the implementation activates (a) a first sound canceller when one or more speakers are playing back audio content or (b) a second sound canceller when the one or more speakers are idle. In response to the wake-word and after activating either (a) the first sound canceller or (b) the second sound canceller, the implementation outputs the acknowledgement tone via the one or more speakers. The implementation captures second audio within the acoustic environment and cancelling the acoustic echo of the acknowledgement tone from the captured second audio using the activated sound canceller.

Abstract: A compact electronic device has a touch sensor and/or a microphone that are concealed within a housing at least partially wrapped by an acoustically porous cover. In some implementations, the touch sensor includes a sensing portion and a contact portion extending from the sensing portion. While the sensing portion is placed in proximity to an interior surface of the housing to detect a touch on the housing, the contact portion is bent to electrically couple the sensing portion to a circuit board via two distinct electrical paths. In some implementations, an exterior surface of the housing includes a sealing area surrounding an aperture on the housing, and the acoustically porous cover is affixed to the sealing area via an adhesive. The adhesive covers the sealing area and permeates a thickness of the acoustically porous cover, thereby enabling formation of a controlled sound path to access the microphone via the aperture.

Abstract: Example techniques involve systems with multiple acoustic echo cancellers. An example implementation captures first audio within an acoustic environment and detecting, within the captured first audio content, a wake-word. In response to the wake-word and before playing an acknowledgement tone, the implementation activates (a) a first sound canceller when one or more speakers are playing back audio content or (b) a second sound canceller when the one or more speakers are idle. In response to the wake-word and after activating either (a) the first sound canceller or (b) the second sound canceller, the implementation outputs the acknowledgement tone via the one or more speakers. The implementation captures second audio within the acoustic environment and cancelling the acoustic echo of the acknowledgement tone from the captured second audio using the activated sound canceller.

Abstract: An audio system for customizing sound fields for increased user privacy. A microphone array of a headset detects sounds from one or more sound sources in a local area of the headset. The audio system estimates array transfer functions (ATFs) associated with the sounds, and determines determining sound field reproduction filters for a loudspeaker array of the headset using the ATFs. The audio system presents audio content, via the loudspeaker array, based in part on the sound field reproduction filters. The presented audio content has a sound field that has a reduced amplitude in a first damped region of the local area that includes a first sound source of the one or more sound sources.

Abstract: The present disclosure provides a method for processing audio signals. The method includes acquiring a first audio signal, the first audio signal including an adjustment instruction for adjusting a broadcast parameter of an electronic device; acquiring first scene information; determining a first amplitude corresponding to the first audio signal based on the first scene information and adjusting the broadcast parameter according to the first amplitude; and determining a second amplitude corresponding to a second audio signal and second scene information that is different from the first scene information. The method further includes adjusting the broadcast parameter of the electronic device according to the second amplitude, the second amplitude being different from the first amplitude, and the second audio signal including an adjustment instruction.

Abstract: A system and method for passively balancing electroacoustic transducers so that sounds other than the transducer's output can be detected. A transducer producing audio output based upon an input audio signal can operate in reverse to produce a signal in response to the impact of external sound upon the transducer from another source. This “reverse” or “microphone” signal represents the sound from the other source. Transducers are operated in monophonic mode, each in opposite polarity to the other thus canceling out and leaving only the microphone signal created by the transducers, i.e., a signal representing the external sound. The microphone signal can be amplified, and can be filtered and processed to identify and/or obtain various types of information about the sound received by the transducers.

Abstract: The technology described in this document can be embodied in a computer-implemented method that includes receiving, at a processing system, a first signal including an output of a speaker device and an additional audio signal. The method also includes determining, by the processing system, based at least in part on a model trained to identify the output of the speaker device, that the additional audio signal corresponds to an utterance of a user. The method further includes initiating a reduction in an audio output level of the speaker device based on determining that the additional audio signal corresponds to the utterance of the user.

Abstract: Methods and apparatus are provided for improving wake-up word (or trigger word) detection by an audio device. After initially detecting a WUW, an audio device validates the detected WUW using inputs from one or more other systems such as voice activity detection (VAD), on-head detection, or other headphone data. Other headphone data includes inputs received via sensors on the audio device that provide contextual information associated with a state of the user. Based on the inputs from other systems, the audio device is able to identify unintended WUW activations and increase WUW detection accuracy.

Abstract: A phrase detection device includes a high latency pipeline to transmit a first portion of audio data from an audio data source to a processing unit, where the high latency pipeline includes a history buffer to store the first portion of the audio data, and a low latency pipeline to transmit a second portion of the audio data from the audio data source to the processing unit with a lower latency than the high latency pipeline. A sound onset detector coupled with the audio data source detects a sound onset event based on the audio data. A synchronization circuit coupled with the high latency pipeline and the low latency pipeline, in response to the sound onset event, synchronizes output to the processing unit of the first portion of the audio data stored in the history buffer and the second portion of the audio data via the low latency pipeline.

Abstract: A throat microphone system and method are disclosed. Certain people may have difficulty vocalizing, such as those suffering from neurodegenerative diseases. The throat microphone system includes a microphone unit that wirelessly communicates with an external device, such as a receiver unit in combination with a smartphone or a smartphone. The microphone unit includes a microphone and a wireless transceiver to wirelessly transmit sound data generated by the microphone. The smartphone processes the sound data in order to increase the intelligibility and/or the volume. Further, the microphone unit may attach to the neck of the wearer and may encircle the neck less than the entire perimeter of the neck. In this way, the microphone unit may be easily removed in the event the wearer is in distress. Moreover, the throat microphone system may include a non-audio sensor, such as a vibration sensor or an electromyograph sensor, in order to determine whether the wearer is voicing speech.

Abstract: An audio system includes a noise-estimation filter, configured to receive a magnitude-squared frequency-domain noise-reference signal and to generate a magnitude-squared frequency-domain noise-estimation signal; and a noise-reduction filter configured to receive a microphone signal from a microphone, the microphone signal including a noise component correlated to an acoustic noise signal, and to suppress the noise component of the microphone signal, based, at least in part, on the magnitude-squared frequency-domain noise-estimation signal, to generate a noise-suppressed signal.

Abstract: The present disclosure relates to an apparatus and a method for cancelling echo by an electronic device. Here, a method of operating an electronic device includes converting a first digital signal related to a sound to be output through a plurality of speakers into a first analog signal; outputting the converted first analog signal as a sound using at least a part of the plurality of speakers; filtering at least a part of the converted first analog signal and/or the output sound and then generating a second analog signal; and outputting the second analog signal as another sound using at least another part of the plurality of speakers.

Abstract: Systems and methods for acoustic feedback cancellation. One method includes transmitting, with a transceiver, a known full-band sequence at a first time. The method includes receiving, via a microphone, a received audio signal including a received copy of the known full-band sequence. The method includes filtering the received audio signal to generate a filtered audio signal, and detecting, based on the filtered audio signal, a second portable communication device in proximity to the portable communication device. The method includes, in response to detecting the second portable communication device, determining, based on the first time and filtered audio signal, an estimated loop delay. The method includes initializing an adaptive feedback cancellation filter based on the estimated loop delay and the plurality of estimated filter coefficients.

Abstract: A system and method for speech enhancement of a portable electronic device. Embodiments may include receiving an audio signal at a portable electronic device having a first microphone and a second microphone. Embodiments may also include receiving an input from a proximity detector associated with the portable electronic device and controlling a processing component associated with at least one of the first microphone and the second microphone based upon, at least in part, the input from the proximity detector.

Abstract: The present disclosure discloses a voice remote controller and a power supplying method thereof. The voice remote controller comprises: a noise gathering module for gathering ambient noise at the periphery of the voice remote controller by using a sound aperture array; a sound-electricity converting module for converting the ambient noise gathered by the noise gathering module into an electrical signal; and an energy storing module for storing the electrical signal converted by the sound-electricity converting module as electric energy and supplying power to the voice remote controller. According to the present disclosure, ambient noise is gathered by a sound aperture array and converted into electricity used as the working energy, thereby avoiding battery replacing or frequent charging. When a voice function of a voice remote controller is turned off, all of the gathered ambient noise is converted into electricity, thereby improving the energy utilization rate.

Abstract: Disclosed herein are system, method, and computer program product embodiments for distributed voice processing. An embodiment operates by receiving audio data from microphones associated with a plurality of devices distributed across an area of interest. A trigger word is detected in the audio data received from at least one of the devices. Responsive to detecting the trigger word, a voice command processing system associated with a multimedia device is activated. Based on the audio data received from at least two or more of the devices, a voice command associated with the multimedia device is determined. The multimedia device is controlled in accordance with the voice command.

Abstract: An image forming apparatus that forms an output image corresponding to input image data on an image carrier by superimposing toner images of colors, includes a hardware processor that: detects color information of the output image for every pixel region; converts color information of the input image data for every pixel region and color information of the output image for every pixel region into indexes which define colors in predetermined color space coordinates; extracts a pixel region in which the color information of the output image is different from the color information of the input image data, and corrects the color information of the input image data with respect to the extracted pixel region; and stores the color information of the input image data as data for calibration in combination with the color information of the output image and image forming conditions when forming the output image.

Abstract: In accordance with one or more embodiments, an access point includes a first communication interface having: a first coupler configured to receive, via a first transmission medium, first guided electromagnetic waves from a first waveguide system of a distributed antenna system, wherein the first guided electromagnetic waves propagate along the first transmission medium without requiring an electrical return path; and also a first receiver configured to receive first data from the first guided electromagnetic waves. A data switch is configured to select first selected portions of the first data for transmission to at least one communication device in proximity to the access point.

Abstract: Certain aspects of the present disclosure relate to techniques and apparatus for improving power efficiency of a wireless device. The techniques may generally include determining a modulation scheme and transmit direction for transmission of a signal using a plurality of antennas, and controlling, separately, at least one amplifier for each of the plurality of antennas, based on the determined transmit direction and modulation scheme.

Abstract: Embodiments of the present invention provide a method for reducing a self-interference signal in a communications system, and an apparatus. The method includes: sending a sounding signal and a first communication signal; receiving an input signal; separating a near-field reflection signal corresponding to the sounding signal from an echo signal of the input signal; determining, based on the near-field reflection signal, a near-field reflection channel parameter; determining, based on the near-field reflection channel parameter, a reconstructed near-field reflected self-interference signal; and subtracting the reconstructed near-field reflected self-interference signal from a received second communication signal. The present invention can effectively recognize and reconstruct a near-field reflection signal, thereby reducing a near-field reflected self-interference signal in self-interference.

Abstract: An apparatus includes a first gain stage, a combiner and a second gain stage. The first gain stage may be configured to amplify a receive signal acquired from a circuit to generate an intermediate signal. The combiner may be configured to combine the intermediate signal with a cancellation signal to generate a combined signal. The cancellation signal is generally derived from a transmit signal a portion of which appears in the receive signal through the circuit. The second gain stage may be configured to amplify the combined signal to generate an output signal.

Abstract: A system may be configured to interact with a user through speech using a first and second audio devices, where the first device produces audio and the second device captures audio. The second device may be configured to perform acoustic echo cancellation with respect to a microphone signal based on a reference signal provided by the first device. The reference and microphone signals may have the same nominal signal rates. However, the signal rates may drift from each other over time. In order to synchronize the rates of the signals, each of the devices maintains a signal index. The second device compares the values of the two signal indexes over time to determine rate differences between the reference and microphone signals and then corrects for the rate differences.

Abstract: A personal proximity warning device for alerting a user to an approaching object includes a housing that defines an interior space. The housing is configured to couple to an article that is coupled to a user. A power module and a transmitter are coupled to the housing and positioned in the interior space. The transmitter is operationally coupled to the power module and is configured to communicate an alert to an electronic device of the user. The electronic device is configured to audibly communicate the alert to the user through one or more speakers that are coupled to the user, such as earbuds and headphones. A sensor is coupled to the housing and operationally coupled to the power module and the transmitter. The sensor is configured to detect motion in an area proximate to the user and to compel the transmitter to communicate the alert upon detection of the motion.

Abstract: A system and method that enhances speech through reinforcement includes capturing an audio signal generated by the audio sources by one or more microphones; decomposing the audio signals into a plurality of virtual audio sources where the number of audio channels delivered by the audio sources is equal to the number of the plurality of virtual audio sources; estimating the echo paths from each of the plurality of virtual audio sources to the one or more microphones; and processing the captured audio signal in response to the estimated echo paths by subtracting the echo contributions of each of the virtual sources to the one or more microphones.

Abstract: An audio signal processing device includes: a short-time fast Fourier transform unit that generates a signal in a frequency domain obtained by performing a short-time fast Fourier transform on an input audio signal; a steady sound determining unit that determines whether a waveform of a peak portion included in a waveform of the signal in a frequency domain is a steady sound; a filter coefficient calculation unit that dynamically calculates a filter coefficient on the basis of a result of determination made by the steady sound determining unit; a comb filter that operates according to the filter coefficient calculated by the filter coefficient calculation unit so as to filter a signal in a frequency domain; and an inverse Fourier transform unit that transforms an output of the comb filter into a signal in a time domain and outputs the signal in a time domain.

Abstract: An electronic device includes an audio player and a processing unit. The processing unit includes a detection module, a timer module, and a control module. The detection module is used to detect an output volume produced currently when the audio player produces sound and to determine whether the output volume conforms to a volume control standard. The timer module is signally connected with the detection module and used to calculate the cumulative time during which the output volume produced by the audio player conforms to the volume control standard when the output volume conforms to the volume control standard and to determine whether the cumulative time equals the control time. The control module is signally connected with the timer module and used to control the audio player to decrease the volume of an output sound or to stop outputting sound when the cumulative time equals the control time.

Abstract: An earphone connected to a smart device is provided. The earphone connected to a smart device includes a voice signal input and output function that returns a sound generated by the smart device itself as well as a sound generated from the exterior into the smart device as a high-quality sound. The voice signal is extracted from a wire that connects the smart device and the ear receiver and inputs the extracted voice signal into the input terminal of the microphone of the smart device.

Abstract: A transceiver front-end for a communication device is connectable at a signal transmission and reception arrangement node to a signal transmission and reception arrangement adapted to transmit a transmit signal having a transmit frequency and to receive a receive signal having a receive frequency. The transceiver front-end is also connectable at a transmitter node to a transmitter adapted to produce the transmit signal and at a receiver node to a receiver adapted to process the receive signal. The transceiver front-end comprises a transformer, wherein the transmitter node is connected to a first node of a first side of the transformer, the receiver node is connected to a first node of a second side of the transformer, and the signal transmission and reception arrangement node is connected to a second node of the first side of the transformer and to a second node of the second side of the transformer.

Abstract: Provided are systems and methods for contextual switching of microphones in audio devices. An example method includes detecting a change in conditions for capturing an acoustic signal by at least two microphones. A configuration is associated with the at least two microphones. The example method provides determining that the change in conditions has been stable for a pre-determined period of time. In response to the determination, the method changes the configuration associated with the at least two microphones. The conditions may include an absence or presence of far-end speech, reverberation, low/high signal-to-noise ratio, low/high signal-to-echo ratio, type of background noise, and so on. The changing of the configuration includes assigning a primary microphone and a secondary microphone based on a change in conditions. Based on the changed configuration, tuning parameters may be adjusted for noise suppression and acoustic echo cancellation.

Abstract: An apparatus comprises a dereverberation module for generating a dereverberated audio signal based on an original audio signal containing reverberation, and an audio-analysis module for generating audio analysis data based on audio analysis of the original audio signal and audio analysis of the dereverberated audio signal.

Abstract: A transceiver is disclosed comprising a transmitter; a receiver; and a signal transmission arrangement. The transmitter comprises a power amplifier, and the signal transmission arrangement is arranged to transmit signals provided from the transmitter through its power amplifier, and arranged to receive signals and provide them to the receiver. The transceiver further comprises an auxiliary power amplifier which has controllable phase shift and gain; a first impedance element; a second impedance element; and a controller.

Abstract: Aspects of a method and system for providing emergency-related services via a broadband gateway are provided. In this regard, a broadband gateway may receive one or more emergency notification messages, generate one or more alert messages in response to the received emergency notification message(s), and communicate the alert message(s) to the electronic device(s). Accordingly, each of the one or more alert messages may be formatted for communication to a corresponding one or corresponding ones of the one or more electronic devices. The emergency notification message(s) may be generated by an emergency services provider in response to an emergency. The emergency services provider may send a notification message to the broadband gateway device upon determining that the broadband gateway device, a person associated with the broadband gateway device, and/or a location associated with the broadband gateway device meets particular criteria.

Abstract: An echo canceller and an echo cancellation method are provided. The echo canceller includes a self-adaptive filter, a voice signal detection portion and a path change detection portion; a far-end voice signal is propagated in an echo path through a speaker and is picked up by a microphone to form an echo signal. The self-adaptive filter is configured to receive the far-end voice signal as a training signal to simulate the echo path, and cancel the echo signal in a near-end signal. The voice signal detection portion is configured to detect a communication status, control the self-adaptive filter according to the communication status, and control startup of the path change detection portion according to the communication status. The path change detection portion is configured to detect whether a change occurs on the echo path, and control the self-adaptive filter according to whether the change occurs on the echo path.

Abstract: A communication device (1) comprising a speaker (2), a microphone (3), a noise detection module (7) adopted to determine an ambient noise level (NL) from a microphone signal received from the microphone (3) and an automatic volume control module (4), which in dependence of a change in noise level adjusts the speaker volume level (SL) to an adjusted level during an adaption time interval (TA). The communication device (1) comprises a motion sensor (5), and the length of the adaption time interval (TA) depends on a motion signal received from the motion sensor (5).

Abstract: In a method for cancelling interference caused by a terrestrial transmitter at a satellite receiver in a hybrid satellite-terrestrial network, a satellite receiver generates an interference cancellation signal based on a reference terrestrial signal from the terrestrial transmitter and a received over-the-air (OTA) signal. The satellite receiver then cancels the interference caused by the terrestrial transmitter by combining the interference cancellation signal with the received OTA signal. The interference cancellation signal is a modified version of the reference terrestrial signal.

Abstract: A watch includes a sound input body and a main body. The main body include an interface unit, a first electromagnetic coil unit, a signal processing unit, and a control unit. The sound input body includes a microphone and a second electromagnetic coil unit. The second electromagnetic coil unit generates inducted electromagnetic filed in response to an electric signal generated by the microphone. The first electromagnetic coil unit coupling the second electromagnetic coil unit generates electric signal in response to the electromagnetic field. The signal processing unit filters algorithm of the electric signal. The control unit recognizes the electric signal amplified by the signal amplification unit to execute corresponding function.

Abstract: A microphone module has a substrate with an aperture to allow sound waves to pass through the substrate, a lid mounted to the substrate to define a first interior volume, a microphone mounted to the substrate within the first interior volume, and a housing coupled to the substrate and covering the aperture. The housing forms a second interior volume and includes an acoustic port configured to allow sound to enter the second interior volume. The module further includes a pipe extending from the acoustic port in the housing, and at least one exterior interface pad outside of the second interior volume. The pipe has an open end to receive sound waves and direct them toward the acoustic port in the housing. Moreover, the at least one exterior interface pad electrically couples to the microphone.

Abstract: A sound process apparatus includes a processor. The processor may execute instructions, which are stored on a memory, and when executed cause the sound process apparatus to perform operations. An obtaining operation may obtain sound data in a remote site. A first determining operation may determine volume levels of voice and noise in the remote site based on the sound data. A second determining operation may determine a volume level of noise in a local site based on the sound in the local site. A third determining operation may determine a target volume level based on the volume level of the voice in the remote site, the volume level of the noise in the remote site, and the volume level of the noise in the local site. A notifying operation may notify a user of the target volume level.

Abstract: A method comprising receiving an indication of an input indicative of the user not facing the apparatus, determining an ambient sound non-limitation directive associated with the audio uplink based, at least in part, on the input, receiving other audio information, determining ambient sound non-limited audio information based, at least in part, on the other audio information, and causing transmission of the ambient sound non-limited audio information by way of the audio uplink is disclosed.

Abstract: Systems, devices, and methods for customizable reduction of perceived ambient sounds are disclosed. Customizable reduction can be achieved via an application operable in conjunction with an audio player or a headset having a microphone.

Abstract: A controller for an echo suppressor configured to suppress a residual echo of a far-end signal included in a primary error signal, the controller adapted for operation with a primary adaptive filter configured to form a primary echo estimate of the far-end signal included in a microphone signal and an echo canceller configured to cancel that primary echo estimate from the microphone signal so as to form the primary error signal, the controller comprising: a secondary adaptive filter configured to form a secondary echo estimate of the far-end signal comprised in the microphone signal; and control logic operable in at least two modes selected in dependence on a convergence state of the primary adaptive filter, the control logic being configured to control activation of the echo suppressor in dependence one or more transient or steady state decision parameters.

Abstract: A method of removing a signal from among received signals, the method including: filtering the received signals; detecting a time band of the filtered received signals where an energy value of the filtered received signals exceeds a reference energy value; and applying a gain value to one or more received signals, from among the received signals, in the detected time band.

Abstract: An acoustic echo cancellation (AEC) system includes a remote device, for capturing a remote captured sound, a server coupled to the remote device, and a local device coupled to the server. The server transmits the remote captured sound from the remote device to the local device. The local device receives, stores and plays the remote captured sound as a local playback sound. An echo is generated from reflection of the local playback sound. The local device captures the echo and a local sound into a local captured sound, and transmits both the remote captured sound and the local captured sound to the server. The server performs AEC on the local captured sound by using the remote captured sound from the local device and transmits the AEC processed local captured sound to the remote device.

Abstract: A second microphone device of a mobile terminal, and more particularly, a second microphone device of a mobile terminal for preventing various limitations caused by mounting of a second microphone, is provided. The second microphone device includes an ear jack connector having an insertion space, a microphone hole connected at one end to the insertion space, and a second microphone connected at the other end of the microphone hole, thereby improving ambient noise removal performance of the mobile terminal without adversely affecting its appearance.

Abstract: A universal reconfigurable system and method are provided for reducing nonlinear echo and residual echo, and for echo leakage prevention in various time-varying and complex environments is proposed in this invention. According to one embodiment an echo cancellation system includes (1) an adaptive linear filter implemented in either time-domain or frequency-domain; (2) a nonlinear echo suppression; (3) echo leakage prevention; (4) direct current (DC), low frequency residual echo and noise reduction; (5) time-domain nonlinear processor (NLP) to reduce the residual echo; and (6) frequency-domain NLP to further reduce the residual echo. The echo cancellation system is universally applicable to acoustic echo cancellation (AEC) and/or electrical echo cancellation applications. In terms of AEC, this invention is reconfigurable for one or more microphones and/or one or more reference channels. The numbers of microphones and reference channels are user configurable.

Abstract: A method and apparatus for suppressing silence frames in a stream of media includes receiving a stream of media from a user and suppressing at least one silence frame from the received stream of media. The suppressed silence frame includes an initial silence frame situated before a first media frame and/or a silence frame situated between two successive media frames.

Abstract: The present invention concerns a method for controlling the interferences generated by radio signals transferred by or to wireless telecommunication devices of a wireless cellular telecommunication network. The method comprises the steps of: forming at least one group of wireless telecommunication devices, allocating at least one identifier to each wireless telecommunication device of the group, the at least one identifier, said as group identifier, being allocated to each wireless telecommunication device of the group of wireless telecommunication devices, the group identifier being intended to be transferred by each wireless telecommunication device to mobile terminals in parallel with another identifier, allocating the same parameters for controlling the interferences generated by radio signals transferred to or by each wireless telecommunication device of the group.

Abstract: An outdoor unit includes: a transmitting module configured to transmit a signal; a splitter module configured to split the signal into two branches, where one branch is input into a amplifier, and the other branch is input into a duplexer; and the amplifier is configured to amplify the signal from the splitter module; the duplexer is configured to filter the signal from the splitter module and then output the signal to an antenna, and filter an external signal received by the antenna and then output the external signal to a combining module; the combining module is configured to combine the signal output by the amplifier with the signal output by the duplexer, and then output a combined signal to a receiving module; and the receiving module is configured to receive the combined signal output by the combining module.