An apparatus and method for treating ambient noise in electronic devices

Abstract

This application provides a device and method for processing spatial environmental noise in electronic devices. The device includes: a communication antenna for receiving communication signals and spatial environmental noise; a detection antenna for real-time detection of the spatial environmental noise; a switching network connecting the signal paths of the communication antenna and the detection antenna respectively, for switching the device's operating mode; a signal processing module connected to the signal path of the detection antenna for amplifying, attenuating, and phase-shifting the detected noise signal; a coupler whose through port is connected to the signal path of the communication antenna, its coupling port is connected to the signal path of the detection antenna, and its output is connected to a radio frequency system; and a control module for adjusting the attenuation and phase shift of the signal processing module according to the noise signal parameters received by the communication antenna and the detection antenna, so that the two noise signals are superimposed in antiphase in the coupler. This application improves the receiving performance of wireless communication devices through active detection and cancellation.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a device and method for processing ambient noise in electronic devices. Background Technology

[0002] In the actual operation of wireless communication devices, in addition to receiving useful communication signals, antennas will inevitably receive environmental noise signals from the external space. These noise signals enter the radio frequency receiver along with the communication signals, causing the receiver's signal-to-noise ratio to decrease, which in turn leads to a deterioration in receiving sensitivity and seriously affects communication quality and system performance. This problem is particularly prominent in application scenarios with complex electromagnetic environments or extremely high requirements for communication reliability.

[0003] Currently, a common solution in the industry to mitigate the impact of such ambient noise in space is to connect a bandpass filter in series in the antenna receiving path. The basic principle of this solution is to utilize the frequency selectivity of the bandpass filter to allow communication signals within the operating frequency band to pass through while suppressing noise signals outside the operating frequency band, thereby achieving the purpose of filtering out out-of-band ambient noise.

[0004] However, the aforementioned traditional solutions have a fundamental limitation: they can only effectively filter out out-of-band noise at frequencies different from the communication signal, while remaining completely ineffective against in-band environmental noise that falls within the receiver's operating frequency band. Because in-band environmental noise overlaps with the frequency of the useful signal and cannot be separated by frequency filtering, it directly enters the receiver, becoming a major factor affecting performance. With the increasing scarcity of wireless communication spectrum resources and the growing complexity of the electromagnetic environment, the interference problem of in-band environmental noise is becoming increasingly significant, becoming a key bottleneck in improving the performance of wireless devices.

[0005] Therefore, there is an urgent need for a solution that can effectively suppress or cancel in-band environmental noise to make up for the shortcomings of traditional filtering methods and fundamentally improve the anti-interference ability and receiving sensitivity of wireless communication devices in complex electromagnetic environments. Summary of the Invention

[0006] In view of this, this application proposes an electronic device and method for processing ambient noise in space, as well as a communication device, which effectively suppresses in-band ambient noise and improves the receiving performance of wireless communication devices by actively detecting and canceling ambient noise.

[0007] In a first aspect, this application provides a device for processing ambient noise in electronic devices, comprising:

[0008] Communication antenna, used to receive communication signals and ambient noise;

[0009] A detection antenna is used to detect ambient noise in the space in real time.

[0010] A switching network, which connects the signal paths of the communication antenna and the detection antenna respectively, is used to switch the operating mode of the device;

[0011] The signal processing module, connected to the signal path of the detection antenna, is used to amplify, attenuate, and phase-shift the detected noise signal.

[0012] A coupler, whose through port is connected to the signal path of the communication antenna, whose coupling port is connected to the signal path of the detection antenna, and whose output is connected to the radio frequency system;

[0013] The control module is used to control the switching of the switching network and adjust the attenuation and phase shift of the signal processing module according to the noise signal parameters received by the communication antenna and the detection antenna, so that the two noise signals are superimposed in opposite phase in the coupler.

[0014] Based on the above, this application establishes an active noise cancellation architecture of dual-antenna detection, signal processing, and anti-phase superposition. By adding a detection antenna to collect ambient noise in real time, and by dynamically adjusting the attenuation and phase shift of the signal processing module through the control module, the two noise signals meet the cancellation conditions of equal power and opposite phase. Then, they are superimposed in anti-phase in the coupler and cancel each other out, thus achieving effective suppression of in-band noise and fundamentally overcoming the limitation of traditional filters that can only filter out out-of-band noise.

[0015] Optionally, the signal processing module includes the following components connected in sequence:

[0016] A first bandpass filter is used to filter out out-of-band ambient noise in the space environment noise.

[0017] A two-stage amplifier is used to amplify the noise signal received by the detection antenna;

[0018] An adjustable attenuator is used to adjust the power of the noise signal;

[0019] An adjustable phase shifter is used to adjust the phase of a noise signal.

[0020] As described above, by filtering out out-of-band ambient noise from the spatial environment through a bandpass filter, only the in-band ambient noise that needs to be processed is retained. Then, the weak noise signal received by the detection antenna can be effectively amplified through a two-stage amplifier to ensure that the signal strength meets the requirements of subsequent attenuation and phase shift adjustment. Furthermore, by cooperating with an adjustable attenuator and an adjustable phase shifter, independent and precise control of the noise signal power and phase can be achieved, realizing two-stage noise suppression that combines out-of-band filtering and in-band cancellation.

[0021] Optionally, the switching network includes:

[0022] A first switch is disposed between the signal processing module and the coupler;

[0023] The second switch is located between the communication antenna and the coupler;

[0024] The control module switches the operating mode by controlling the on / off states of the first switch and the second switch.

[0025] As described above, the communication antenna and detection antenna paths are controlled by two independent switches, and their on / off states are coordinated by the control module. This enables fast and reliable switching between different modes such as detection, calibration, and operation, ensuring the timing accuracy and functional integrity of the system operation.

[0026] Optionally, the communication antenna and the detection antenna have a preset isolation degree.

[0027] As described above, the communication antenna and the detection antenna have a preset spatial isolation, which can avoid signal crosstalk between the two antennas, prevent the detection antenna from mistakenly receiving communication signals or reflected noise from the communication antenna, and ensure that the detection antenna collects pure spatial environmental noise.

[0028] Optionally, the signal path of the communication antenna further includes a cascaded matching network and a second bandpass filter;

[0029] The matching network is used to match the impedance of the communication antenna to the system transmission impedance;

[0030] The second bandpass filter is used to filter out out-of-band ambient noise in the space environment noise.

[0031] As described above, by adding a matching network and a bandpass filter to the communication antenna path, the matching network matches the communication antenna impedance to the system transmission impedance, reducing reflection loss during signal transmission and ensuring that the noise signal and communication signal received by the communication antenna can be efficiently transmitted to the coupler. The bandpass filter ensures that out-of-band noise is filtered out before the main path enters the cancellation stage, so that the two noise signals to be canceled are both in-band noise, avoiding interference from out-of-band signals and improving the targeting of noise reduction.

[0032] Optionally, the control module controlling the switching of the switching network specifically includes:

[0033] In the first time period, the signal path of the communication antenna is turned on, and the signal path of the detection antenna is turned off, and the first power and first phase of the noise signal are measured.

[0034] In the second time period, the signal path of the detection antenna is turned on, and the signal path of the communication antenna is turned off, and the second power and second phase of the noise signal are measured.

[0035] In the third time period, the signal path of the communication antenna is turned on again, and the signal path of the detection antenna is turned off to measure the third phase.

[0036] The actual phase difference between the two noise signals is calculated based on the first phase, the second phase, and the third phase, and the attenuation is calculated based on the first power and the second power.

[0037] Therefore, by adopting a three-stage time-division detection mode, the phase error caused by switching delay and signal processing delay is eliminated through a combination of two communication antenna path activations and one detection antenna path activation. Based on the detected first power, second power, first phase, second phase, and third phase, the actual phase difference and attenuation of the two noise signals can be accurately calculated, providing precise data support for parameter adjustment of the signal processing module and ensuring that the power of the cancellation signal and the noise signal are equal and their phases are opposite.

[0038] Secondly, this application provides a method for processing ambient noise in the space of an electronic device, applied to the aforementioned device for processing ambient noise in the space of an electronic device, comprising:

[0039] Real-time detection of ambient noise in space using a detection antenna;

[0040] The system controls the switching of signal paths between the communication antenna and the detection antenna, measures the power and phase of the two noise signals, and performs attenuation and phase shifting on the detected noise signals based on the measurement results.

[0041] The processed noise signal is coupled to the receiving path of the communication antenna through a coupler, so that the two noise signals have equal power and opposite phase in the coupler, thus achieving noise cancellation.

[0042] Based on the above-mentioned device, this application achieves active and dynamic cancellation of space environment noise through a complete process of noise detection, parameter measurement, signal processing, and coupling cancellation, thereby effectively solving the problem of in-band noise interference.

[0043] Optionally, the phase-shifting processing of the detected noise signal based on the measurement results includes:

[0044] The phase of the noise signal in the signal path of the communication antenna and the detection antenna was measured in the first time period, the second time period, and the third time period, respectively.

[0045] The actual phase difference between the two noise signals is calculated using the following formula. :

[0046] ;

[0047] in, , , The noise signal phases measured in the first, second, and third time periods are respectively.

[0048] The phase shift amount is calculated using the following formula. :

[0049] .

[0050] As described above, by accurately calculating the actual phase difference between the two noise signals, the interference of fixed delay phase generated during switching and signal processing is removed, the true phase relationship of the noise signals is obtained, and the phase shift is derived based on the actual phase difference, ensuring that the phase difference between the noise signal processed by the detection antenna and the noise signal of the communication antenna is 180°, thus providing accurate phase guarantee for anti-phase superposition and cancellation.

[0051] Optionally, the attenuation processing of the detected noise signal based on the measurement results includes:

[0052] The noise signal power in the signal paths of the communication antenna and the detection antenna was measured in the first and second time periods, respectively.

[0053] The attenuation is calculated using the following formula:

[0054] ;

[0055] in, This is the attenuation amount. , This represents the gain of the two-stage amplifier. , These represent the noise signal power in the signal paths of the communication antenna and the detection antenna, respectively.

[0056] Therefore, by accurately calculating the attenuation and combining it with the fixed gain of the two-stage amplifier, the power of the noise signal processed by the detection antenna can be precisely adjusted to be equal to the power of the noise signal of the communication antenna, thereby maximizing the cancellation of the noise signal.

[0057] Thirdly, this application provides a communication device, including the aforementioned electronic device for processing ambient noise in space.

[0058] These and other aspects of this application will become more apparent in the description of the following embodiments(s). Attached Figure Description

[0059] Figure 1 A schematic diagram of the communication antenna and detection antenna provided in the embodiments of this application;

[0060] Figure 2 A circuit architecture diagram of an electronic device for processing ambient noise in space provided in this application embodiment;

[0061] Figure 3 This is a flowchart of a method for processing ambient noise in an electronic device, provided as an embodiment of this application.

[0062] It should be understood that the dimensions and shapes of the block diagrams in the above structural diagrams are for reference only and should not constitute an exclusive interpretation of the embodiments of this application. The relative positions and inclusion relationships between the block diagrams presented in the structural diagrams are only schematic representations of the structural relationships between the block diagrams, and are not intended to limit the physical connection methods of the embodiments of this application. Detailed Implementation

[0063] The technical solutions provided in this application will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the system architecture and business scenarios provided in the embodiments of this application are mainly for illustrating possible implementations of the technical solutions of this application and should not be construed as the sole limitation on the technical solutions of this application. Those skilled in the art will recognize that the technical solutions provided in this application are equally applicable to similar technical problems as system architectures evolve and new business scenarios emerge.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In case of any inconsistency, the meaning set forth in this specification or derived from the content described herein shall prevail. Furthermore, the terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit the scope of this application.

[0065] The solutions provided in this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0066] This application proposes a device and method for processing spatial environmental noise in electronic devices. The core of this method utilizes a dual-antenna detection, precise signal adjustment, and anti-phase superposition cancellation architecture to effectively suppress spatial environmental noise (especially in-band noise). This application is applicable to various wireless communication devices that rely on radio frequency signal transmission, such as mobile phones, IoT terminals, and base station receivers, and aims to solve the technical problem that traditional bandpass filters cannot suppress in-band environmental noise.

[0067] like Figure 1As shown, in the hardware architecture design of this embodiment, a conventional communication antenna ANT1 is first designed to simulate the normal transmitting and receiving antenna of a wireless communication device. Then, a spatial environment noise detection antenna ANT2 is designed on the side or at another location. The detection antenna ANT2 and the communication antenna ANT1 are kept at a certain distance in space to meet the isolation requirements of the two antennas and ensure that they will not interfere with each other. Then, a dipole antenna is used at the far end to simulate the spatial environment noise source N1, thereby simulating a communication environment similar to the actual application scenario. In the simulated communication environment, the spatial environment noise processing device of the electronic device provided in this embodiment is used to suppress and verify the effect of spatial environment noise.

[0068] like Figure 2 The diagram shown is a circuit architecture diagram of an electronic device for processing ambient noise in an embodiment of this application. (Refer to...) Figure 2 As shown, the device includes a communication antenna ANT1, a detection antenna ANT2, a switch network (switches S1 and S2), a signal processing module, a directional coupler U5, a control module U6, and a radio frequency system U7.

[0069] The communication antenna ANT1 is used to receive communication signals and ambient noise. To optimize signal transmission, a matching network and a bandpass filter U4 are connected sequentially after the communication antenna ANT1. The matching network can be a π-type matching network, which is used to match the impedance of the communication antenna ANT1 to the system transmission impedance (e.g., 50 ohms). The bandpass filter U4 is used to filter out the out-of-band ambient noise in the ambient noise received by the communication antenna ANT1, retaining only the in-band ambient noise, and transmitting the in-band ambient noise and communication signal to the directional coupler U5 through the back-end switching network.

[0070] The detection antenna ANT2 is independently configured and spatially distanced from the communication antenna ANT1 to ensure sufficient isolation (e.g., greater than 30dB) to avoid mutual interference. The detection antenna ANT2 is used to detect the ambient noise in real time and transmit the detected ambient noise to a signal processing module connected to the back end. This signal processing module includes a bandpass filter U1, a driver amplifier P1, a power amplifier P2, an adjustable attenuator U2, and an adjustable phase shifter U3 connected in series. The bandpass filter U1 is used to pre-filter out out-of-band ambient noise from the detected ambient noise; amplifiers P1 and P2 are used to amplify the weak noise signal (in-band ambient noise) to a suitable processing level; the adjustable attenuator U2 and the adjustable phase shifter U3 are used to precisely adjust the power and phase of the signal, respectively.

[0071] The switch network consists of switches S1 and S2. Switch S1 is connected in series between the output of the adjustable phase shifter U3 and the coupling port 2 of the directional coupler U5. Switch S2 is connected in series between the output of the bandpass filter U4 and the through port 3 of the directional coupler U5. In this embodiment, each switch is a single-pole double-throw switch, and its other throw port is connected in series with a 50-ohm matching load (R1, R2) and then grounded. The control terminal CTL of switch S1 is connected to the control port 2 of the control module U6, and the control terminal CTL of switch S2 is connected to the control port 1 of the control module U6.

[0072] The directional coupler U5 is a key component for noise cancellation, and its main output port 1 (PORT1) is connected to the subsequent radio frequency system U7. When the device is in normal operation (cancellation) mode, the signal received by the communication antenna ANT1 is transmitted to PORT1 through the through port 3. At the same time, the noise signal received and processed by the detection antenna ANT2 is injected into the main path through the coupling port 2. Through precise control, the injected noise signal and the original noise signal in the main path are made to have equal power and opposite phase at the main output port 1 (PORT1), thereby achieving cancellation.

[0073] The control module U6 can be implemented by an MCU system, which is responsible for the logic control and parameter calculation of the entire device. It switches the working mode of the system by controlling the switching states of S1 and S2, and calculates and sets the attenuation of the adjustable attenuator U2 and the phase shift of the adjustable phase shifter U3 in real time based on the noise signal power and phase data measured in a specific mode, so that the two noise signals are superimposed in opposite phase in the directional coupler U5.

[0074] This application embodiment establishes an active noise cancellation architecture with dual-antenna detection, signal processing, and anti-phase superposition. The added detection antenna ANT2 collects ambient noise in real time, and the control module dynamically adjusts the attenuation and phase shift of the signal processing module to ensure that the two noise signals meet the cancellation conditions of equal power and opposite phase. Then, they are superimposed in anti-phase in the coupler and cancel each other out, thus achieving effective suppression of in-band noise and fundamentally overcoming the limitation of traditional filters that can only filter out out-of-band noise.

[0075] The following is based on Figure 2 The circuit architecture diagram shown, combined with Figure 3 This paper describes a method for processing ambient noise in an electronic device, and provides a detailed description of the noise cancellation process in an embodiment of this application. (Refer to...) Figure 3 As shown, the method includes:

[0076] S110: Real-time detection of ambient noise in space via a detection antenna.

[0077] In this step, the detection antenna ANT2 detects ambient noise in real time and transmits the detected ambient noise to the back-end bandpass filter U1. The bandpass filter U1 filters out out-of-band ambient noise from the detected ambient noise, retaining only in-band ambient noise, which is then transmitted to the back-end amplifiers P1 and P2. The weak noise signal (in-band ambient noise) is amplified to a suitable level by two stages of amplifiers, so that it can be attenuated and phase-shifted by the back-end adjustable attenuator U2 and adjustable phase shifter U3.

[0078] S120: Controls the switching of signal paths between the communication antenna and the detection antenna, measures the power and phase of the two noise signals, and performs attenuation and phase shifting on the detected noise signals based on the measurement results.

[0079] In this step, the control module U6 (MCU system) adopts a three-time division multiplexing detection mode, using a combination of two communication antenna path activations and one detection antenna path activation to accurately measure the power and phase of the two noise signals. Specifically:

[0080] In the first time period (T1): Control port 1 of the MCU system outputs a low level, the RFC pin of switch S2 is connected to the RF1 pin, and the signal path of communication antenna ANT1 is open. Control port 2 outputs a high level, and the RFC pin of switch S1 is connected to the RF2 pin (connected to a 50-ohm load, switch S1 is open), and the signal path of detection antenna ANT2 is closed. At this time, the ambient noise signal radiates to communication antenna ANT1, and after passing through the matching network, bandpass filter U4, switch S2, and directional coupler U5, it is transmitted to PORT1 of directional coupler U5, and then to the RF system and MCU system. After signal processing, the MCU system measures the power of the noise signal during this time period as follows: The signal phase is .

[0081] Second time period (T2): The MCU system rapidly switches the switch state, outputting a high level through control port 1. The RFC pin and RF2 pin of switch S2 are connected (connected to a 50-ohm load, switch S2 is disconnected). The signal path port of communication antenna ANT1 outputs a low level through control port 2, connecting the RFC pin and RF1 pin of switch S1. The signal path of detection antenna ANT2 is then connected. At this time, the ambient noise signal received by detection antenna ANT2 passes sequentially through bandpass filter U1, amplifiers (P1, P2), adjustable attenuator U2 (set to an initial value, such as 0 attenuation), and adjustable phase shifter U3 (phase shift set to 0°), and then reaches point PORT1 through directional coupler U5. The MCU system measures and records the power of the noise signal during this period. The signal phase is .

[0082] In the third time period (T3): the MCU system quickly switches its switching state again, returning to the control state of the first time period. The signal path of communication antenna ANT1 is turned on, and the signal path of detection antenna ANT2 is turned off. The MCU system measures and records the phase of the noise signal during this period. This measurement aims to eliminate the fixed system delay phase caused by switching and circuit processing. The introduced error.

[0083] Based on the above three measurements, the following calculations are performed by the MCU system:

[0084] because ,and ;

[0085] Combining the two equations, we obtain the actual phase difference between the two noise signals:

[0086] ;

[0087] Should This represents the actual phase difference between the original noise signals from the detection antenna ANT2 signal path and the communication antenna ANT1 signal path at point PORT1 of the directional coupler U5.

[0088] To ensure that the two signals cancel each other out of phase, the phase shift that needs to be compensated is:

[0089] ;

[0090] The MCU system can then use the calculated phase shift amount Set the phase shift amount of the adjustable phase shifter U3.

[0091] Considering the total gain of the drive amplifier P1 and the power amplifier P2 in the detection path is To ensure that the power of the two noise signals is equal at PORT1 of the directional coupler U5, the adjustable attenuator U2 needs to be set with the following attenuation level (in dB):

[0092] ;

[0093] The MCU system can then use the calculated attenuation amount Set the attenuation level of the adjustable attenuator U2.

[0094] S130: The processed noise signal is coupled to the receiving path of the communication antenna through a coupler, so that the two noise signals have equal power and opposite phase in the coupler, thereby achieving noise cancellation.

[0095] After completing the calibration of phase shift and attenuation, the MCU system can control switches S1 and S2 to simultaneously turn on their respective RF1 terminals (i.e., simultaneously connect the signal paths of communication antenna ANT1 and detection antenna ANT2). At this time, the communication signal and ambient noise signal received by communication antenna ANT1 pass normally and are transmitted to the through port 3 of directional coupler U5 through the turned-on switch S2. Simultaneously, the ambient noise signal received by detection antenna ANT2 is amplified and... Attenuation, Press After phase shifting, the signal is transmitted to coupling port 2 of directional coupler U5 via the on switch S1. The two noise signals are superimposed in opposite phases in directional coupler U5, thus being significantly canceled out, while the useful communication signal remains unaffected, effectively improving the signal-to-noise ratio and sensitivity of the RF system.

[0096] In summary, the electronic device spatial environmental noise processing apparatus and method provided in this application, through a system architecture of dual-antenna detection, adaptive signal processing, and active noise cancellation, and through a processing flow that achieves optimal cancellation effect by real-time detection of environmental noise, precise control of signal power and phase, and closed-loop adjustment, solves the problem of in-band environmental noise that traditional filters cannot handle, significantly improves the receiving sensitivity and communication performance of wireless communication devices, and has strong engineering practicality and industry promotion value.

[0097] It should be noted that the embodiments described in this application are merely some embodiments, not all embodiments. The components of the embodiments of this application typically described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the above detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0098] The terms "first, second, third, etc." or similar terms such as module A, module B, module C, etc., used in the specification and claims are only used to distinguish similar objects and do not represent a specific ordering of objects. It is understood that a specific order or sequence may be interchanged where permitted so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0099] In the above description, the labels indicating the steps do not necessarily mean that the steps will be executed. They may include intermediate steps or be replaced by other steps. Where permissible, the order of the steps may be interchanged or executed simultaneously.

[0100] The term "comprising" as used in the specification and claims should not be construed as limiting itself to what follows; it does not exclude other devices or steps. Therefore, it should be interpreted as specifying the presence of the mentioned features, elements, steps, or components, but does not exclude the presence or addition of one or more other features, elements, steps, or components, or groups thereof. Thus, the statement "device comprising means A and B" should not be limited to a device consisting solely of components A and B.

[0101] The terms "an embodiment" or "an embodiment" as used in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in at least one embodiment of this application. Therefore, the terms "in one embodiment" or "in an embodiment" appearing throughout this specification do not necessarily refer to the same embodiment, but may refer to the same embodiment. Furthermore, in the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions between different embodiments are consistent and can be mutually referenced. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0102] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present application has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. An electronic device spatial ambient noise processing apparatus, characterized by, include: Communication antenna, used to receive communication signals and ambient noise; A detection antenna is used to detect ambient noise in the space in real time. A switching network, which connects the signal paths of the communication antenna and the detection antenna respectively, is used to switch the operating mode of the device; The signal processing module, connected to the signal path of the detection antenna, includes a first bandpass filter, a two-stage amplifier, an adjustable attenuator, and an adjustable phase shifter connected in sequence. It is used to filter out out-of-band environmental noise in the space environment noise, and to amplify, attenuate, and phase-shift the detected noise signal. A coupler, whose through port is connected to the signal path of the communication antenna, whose coupling port is connected to the signal path of the detection antenna, and whose output is connected to the radio frequency system; The control module is used to control the switching of the switching network, and adjust the attenuation and phase shift of the signal processing module according to the noise signal parameters received by the communication antenna and the detection antenna, so that the two noise signals are superimposed in opposite phase in the coupler; The switch network includes a first switch disposed between the signal processing module and the coupler; The second switch is located between the communication antenna and the coupler; The control module controls the switching of the switching network, specifically including: In the first time period, the signal path of the communication antenna is turned on, and the signal path of the detection antenna is turned off, and the first power and first phase of the noise signal are measured. In the second time period, the signal path of the detection antenna is turned on, and the signal path of the communication antenna is turned off, and the second power and second phase of the noise signal are measured. In the third time period, the signal path of the communication antenna is turned on again, and the signal path of the detection antenna is turned off to measure the third phase. The actual phase difference between the two noise signals is calculated based on the first phase, the second phase, and the third phase, and the attenuation is calculated based on the first power and the second power.

2. The apparatus of claim 1, wherein, The communication antenna and the detection antenna have a preset isolation degree.

3. The apparatus of claim 1, wherein, The signal path of the communication antenna also includes a cascaded matching network and a second bandpass filter; The matching network is used to match the impedance of the communication antenna to the system transmission impedance; The second bandpass filter is used to filter out out-of-band ambient noise in the space environment noise.

4. The method of processing ambient noise of an electronic device space environment according to any one of claims 1-3, wherein, include: Real-time detection of ambient noise in space using a detection antenna; The system controls the switching of signal paths between the communication antenna and the detection antenna, measures the power and phase of the two noise signals, and performs attenuation and phase shifting on the detected noise signals based on the measurement results. The processed noise signal is coupled to the receiving path of the communication antenna through a coupler, so that the two noise signals have equal power and opposite phase in the coupler, thus achieving noise cancellation.

5. The method of claim 4, wherein, The phase-shifting process for the detected noise signal based on the measurement results includes: The phase of the noise signal in the signal path of the communication antenna and the detection antenna was measured in the first time period, the second time period, and the third time period, respectively. The actual phase difference of the two noise signals is calculated by the following equation : ； wherein , , are the noise signal phases measured during the first, second, third time period, respectively. The phase shift amount is calculated by the following equation : 。 6. The method of claim 4, wherein, The attenuation process for the detected noise signal based on the measurement results includes: The noise signal power in the signal paths of the communication antenna and the detection antenna was measured in the first and second time periods, respectively. The attenuation is calculated using the following formula: ； wherein is an attenuation amount, , is a gain amount of the two-stage amplifier, , are noise signal powers in signal paths of the communication antenna and the detection antenna, respectively.

7. A communication device, characterized by Includes an electronic device for processing spatial environmental noise as described in any one of claims 1-3.

Images