Signal isolation method and device based on phase deviation

Abstract

The invention belongs to the technical field of wireless communication signal isolation, and discloses a signal isolation method and device based on phase deviation. The signal isolation method based on phase deviation comprises the following steps: acquiring an original analog time domain signal when a base station transmitting signal in a signal coverage area reaches the edge of the signal coverage area; on the basis of the center frequency of a base station transmitting signal, half-cycle odd-number-times delay processing is carried out on the obtained original simulation time domain signal, and a delay signal is obtained; and superposing the delay signal and the original analog time domain signal to realize isolation of signals outside the signal coverage area. According to the technical scheme, normal signals in the signal coverage area and signal isolation outside the signal coverage area can be effectively guaranteed, and the safety problem and the external interference problem caused by the fact that the signal boundary is not easy to control are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless communication signal isolation, and in particular relates to a signal isolation method and device based on phase shift. Background Art

[0002] In the substations, converter stations, switchgear and other areas of the new power system, the data and information transmission within the area is currently mainly carried out by wired transmission. With the refinement of equipment detection, more and more information needs to be collected; in addition, the rapid digital transformation and intelligent upgrading of power equipment have also made the scale of data transmission within the area larger and larger; therefore, the above-mentioned existing wired transmission solutions involve technical difficulties such as inconvenient deployment and difficult construction, and encounter bottlenecks in data transmission within the area.

[0003] Wireless technology has developed rapidly and has carried a large amount of data communication services in many fields. The use of wireless transmission solutions can solve the drawbacks of wired transmission solutions in power systems, but it has introduced new problems in terms of physical security, especially the security problems caused by the difficulty in controlling signal boundaries. Specifically, in new power systems, substations, converter stations, switchgear and other areas need to achieve high-security, high-reliability, and high-bandwidth wireless communications within the area. Wireless communications use radio electromagnetic waves to transmit information and cannot have good range control and boundary definition like wired communications (that is, it is hoped that good communication can be achieved through wireless within the boundary, and at the same time, it is hoped that the signal will not be obtained by unreasonable means outside the boundary); in addition, there may be active or passive interference signals outside the boundary, which will interfere with internal communications. To further explain, in the new power system, inspection robots, smart terminals, and mobile devices in areas such as substations, converter stations, and switchgear usually use WAPI (Wireless LAN Authentication and Privacy Infrastructure), WIFI (Wireless Fidelity), and WIA (WLAN Authentication Infrastructure) to communicate. During the communication process, the baseband signal needs to be loaded onto the carrier signal through IQ modulation (i.e., in-phase and quadrature modulation, with I as the in-phase component and Q as the quadrature component) to achieve effective spatial transmission of the signal; in the signal transmission process of the above-mentioned technical means, there is inevitably the problem of wireless signals inside the physical space radiating to the outside of the space, causing information leakage, and there is also the problem of signals outside the physical space radiating in and interfering with the internal signals. In summary, for the new power system, preventing the leakage of internal wireless signals and preventing the entry of external interference signals have become urgent problems to be solved in wireless signal isolation (i.e., achieving isolation of wireless signals inside and outside the boundary). Summary of the invention

[0004] The purpose of the present invention is to provide a signal isolation method and device based on phase shift to solve one or more of the above-mentioned technical problems. The technical solution disclosed in the present invention is specifically a solution for isolating signals inside and outside the area based on time domain signal phase shift, which can effectively ensure the normal signal in the signal coverage area and the signal isolation outside the signal coverage area, and solve the security problem and external interference problem caused by the difficulty in controlling the signal boundary.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a signal isolation method based on phase shift, comprising the following steps: Acquire the original analog time domain signal of the base station transmission signal in the signal coverage area reaching the edge of the signal coverage area; Based on the center frequency of the base station transmission signal, the acquired original analog time domain signal is delayed by an odd multiple of half a period to obtain a delayed signal; The delayed signal is superimposed on the original analog time domain signal to isolate the signal outside the area covered by the signal.

[0006] A further improvement of the method of the present invention is that The step of performing a half-cycle odd-number delay process on the acquired original analog time domain signal based on the center frequency of the base station transmission signal to obtain a delayed signal comprises: Digitally sampling the original analog time domain signal to obtain a digitally sampled signal; Analyze the obtained digitally sampled signal to obtain the center frequency of the original analog time domain signal; based on the center frequency and the sampling frequency of the digital sampling, obtain the number of half-period sampling points based on the center frequency; The number of signal delay sampling points is calculated using the center frequency, sampling frequency, half-cycle sampling points and the preset inherent time delay; the digitally sampled signal is delayed and converted into digital-to-analog form according to the number of signal delay sampling points to obtain a delayed signal.

[0007] A further improvement of the method of the present invention is that The calculation expression of the signal delay sampling points is: ; In the formula, The number of sampling points for signal delay; T is the inherent delay; is the center frequency; is the sampling frequency; n is the number of sampling points in half a period.

[0008] A further improvement of the method of the present invention is that The original analog time domain signal is expressed as: ; In the formula, The original analog time domain signals are obtained respectively. I , Q The amplitude of the signal; is the center frequency; The delay signal is expressed as: ; In the formula, n is the number of sampling points in a half cycle; in, = .

[0009] A second aspect of the present invention provides a signal isolation device based on phase shift, comprising: A receiving antenna is used to obtain the original analog time domain signal of the base station transmission signal in the signal coverage area reaching the edge of the signal coverage area; A delayed signal acquisition system, used for performing a half-cycle odd-number delay process on the acquired original analog time domain signal based on the center frequency of the base station transmission signal to obtain a delayed signal; The transmitting antenna is used to transmit a delayed signal so that the delayed signal is superimposed on the original analog time domain signal, thereby isolating the signal outside the area covered by the signal.

[0010] A further improvement of the device of the present invention is that the delayed signal acquisition system comprises: The radio frequency signal receiving module is used to digitally sample the original analog time domain signal to obtain a digitally sampled signal; The RF signal analysis module is used to analyze the obtained digitally sampled signal to obtain the center frequency of the original analog time domain signal; based on the center frequency and the sampling frequency of the digital sampling, obtain the number of half-period sampling points based on the center frequency; The RF signal delay module is used to calculate the number of signal delay sampling points using the center frequency, sampling frequency, half-cycle sampling points and preset inherent time delay; and to perform delay processing and digital-to-analog conversion on the digitally sampled signal according to the number of signal delay sampling points to obtain a delayed signal.

[0011] A further improvement of the device of the present invention is that: The calculation expression of the signal delay sampling points is: ; In the formula, The number of sampling points for signal delay; T is the inherent delay; is the center frequency; is the sampling frequency; n is the number of sampling points in half a period.

[0012] A further improvement of the device of the present invention is that: The original analog time domain signal is expressed as: ; In the formula, The original analog time domain signals are obtained respectively. I , Q The amplitude of the signal; is the center frequency; The delay signal is expressed as: ; In the formula, n is the number of sampling points in a half cycle; in, = .

[0013] A further improvement of the device of the present invention is that: The receiving antenna is a directional antenna, and the main lobe of the receiving antenna is oriented toward the inside of the signal coverage area; The transmitting antenna is a directional antenna, and the main lobe of the transmitting antenna is directed to the outside of the signal coverage area.

[0014] A further improvement of the device of the present invention is that: The signal isolation device is used to be deployed at the boundary of the signal coverage area.

[0015] According to a third aspect of the present invention, there is provided an electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the signal isolation method based on phase shift as described in any one of the first aspect of the present invention is implemented.

[0016] According to a fourth aspect of the present invention, a non-transitory computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the signal isolation method based on phase shift as described in any one of the first aspect of the present invention is implemented.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a signal isolation method based on phase shift. By means of the technical means of delaying the original analog time domain signal by an odd half-cycle, it can effectively ensure the normal signal in the signal coverage area and the isolation of the signal outside the signal coverage area, solving the safety problem and external interference problem caused by the difficulty in controlling the signal boundary; further illustrative, the technical solution of the present invention can delay the specific signal in the power application environment without loss, and by superimposing the delayed signal with the original signal, the signal emitted outside the coverage area tends to 0, achieving the isolation and blocking of the signal inside the area outside the area. In the technical solution of the present invention, the processing of the signal is only in the time domain, the processing method is simple, and the processing performance is high.

[0018] In the preferred technical solution of the present invention, directional antennas are used and spatial attenuation in the signal propagation direction is utilized to further ensure effective isolation of signals outside the coverage area, with less impact on signals inside the coverage area, thereby achieving precise isolation of target signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below; obviously, the drawings described below are some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a flow chart of a signal isolation method based on phase shift in an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of a signal isolation environment in an embodiment of the present invention.

[0022] Figure 3 It is a schematic diagram of an original signal, a delayed signal and a superimposed signal in an embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of an implementation flow of a signal isolation method based on phase shift in a specific embodiment of the present invention.

[0024] Figure 5 Schematic diagram of a signal isolation device based on phase shift in an embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of a signal isolation device based on phase shift in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments and technical solutions are only part of the embodiments of the present invention, not all of the embodiments.

[0027] All other embodiments obtained by those of ordinary skill in the art without creative work based on the technical solutions disclosed in the embodiments of the present invention belong to the scope of protection of the present invention. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] See also Figure 1 , an embodiment of the present invention provides a signal isolation method based on phase shift, comprising the following steps: Step 1, obtaining the original analog time domain signal of the base station transmission signal in the signal coverage area reaching the edge of the signal coverage area; Step 2, based on the center frequency of the base station transmission signal, the obtained original analog time domain signal is delayed by an odd multiple of half a period to obtain a delayed signal; Step 3: superimpose the delayed signal with the original time domain signal to achieve spatial signal fading and complete the isolation of signals outside the signal coverage area.

[0029] The technical solution provided by the embodiment of the present invention is based on the principle of phase shift and cleverly uses odd half-cycle delay technology to process the original analog time domain signal. The core advantage of this technical solution is that it can not only ensure stable and lossless signal transmission within the signal coverage area, but also effectively isolate signals outside the signal coverage area, fundamentally solving the security risks and external interference problems caused by blurred signal boundaries.

[0030] In order to more intuitively illustrate the technical effect of the present invention, a specific application example is given: in the power application environment, the method of the present invention can realize lossless delay processing of specific signals, and through the superposition of the delayed signal and the original signal, the signal strength finally transmitted outside the coverage area tends to zero, thereby realizing effective isolation and blocking of signals within the area at the physical level, greatly improving the accuracy and safety of signal management. It is worth noting that the technical solution of the present invention only involves the processing of signals in the time domain, avoiding complex frequency domain or time-frequency domain conversion, so the processing method is extremely concise and efficient, reducing the difficulty of implementation, and significantly improving the real-time nature of signal processing and the overall performance of the system. The signal isolation method of the present invention, which is characterized by simplicity and high efficiency, provides strong technical support for various application scenarios that require precise control of the signal propagation range, and has broad application prospects and important practical value.

[0031] See also Figures 2 to 4 In a specific embodiment of the present invention, a signal isolation method based on phase shift is provided, comprising the following steps: A wireless analog signal is received through a receiving antenna; in a specific exemplary technical solution, an analog time domain signal of a base station wireless radio frequency signal in a signal coverage area is received through a receiving antenna, and the analog time domain signal is digitally sampled to obtain a digitally sampled signal; in a further preferred technical solution, the receiving antenna is a directional antenna, and the main lobe of the receiving antenna is directed toward the signal coverage area; Analyze the digitally sampled signal to obtain the carrier center frequency of the analog time domain signal ; Carrier center frequency based on analog time domain signal And the sampling frequency when digital sampling , get the number of sampling points of the carrier half-cycle digital signal n ; Using the carrier center frequency , sampling frequency , Number of sampling points n And the preset inherent delay T , calculate the number of signal delay sampling points ; The digitally sampled signal is delayed according to the number of signal delay sampling points, and is output to the transmitting antenna through the radio frequency signal transmitting module for signal transmission.

[0032] In a specific embodiment of the present invention, the number of signal delay sampling points is calculated. In the steps, Signal delay sampling points The calculation expression is: ; In the formula, The number of sampling points for signal delay; T is the inherent delay; is the carrier center frequency; is the sampling frequency; n is the number of sampling points.

[0033] In the technical solution provided by the embodiment of the present invention, based on the needs of specific scenarios, the signal isolation inside and outside the signal coverage area is achieved by delaying the time domain signal; wherein, the signal processing is only in the time domain, the processing method is simple, and the processing performance is high. In addition, the use of directional antennas and the use of spatial attenuation in the direction of signal propagation ensures effective isolation of signals outside the coverage area, has little impact on signals inside the coverage area, and can achieve accurate isolation of target signals.

[0034] In a specific embodiment of the present invention, the step of obtaining a preset inherent delay may include: before using the device, testing the overall inherent delay of the device to obtain the inherent delay; wherein, the delay parameter is set to 0, the signal is input to the receiving antenna in a wired manner, the output signal is obtained at the transmitting antenna in a wired manner, and the time point of the input signal is subtracted from the time point of the output signal to determine the overall inherent delay of the system.

[0035] In view of the specific scenarios in power scenarios such as substations, converter stations, and switchgear, the signals inside the physical space do not want to be obtained by the outside world and the interference of external signals on the effective communication signals inside the physical space needs to be reduced. The embodiment of the present invention specifically provides a signal isolation method based on phase shift. Explanatory principle: In the existing wireless communication method, IQ modulation is mainly used to achieve the mixing of baseband signals and carrier signals in engineering, thereby achieving the purpose of wireless signal transmission. In communication theory, any signal can be represented in the frequency domain as , is the signal amplitude, is the signal frequency, is the signal phase. By decomposing the signal using the triangular formula, we can get the following expression: ; After the signal is modulated, the IQ data is sent out through the wireless RF hardware; at the receiving end, the RF modulated signal can be demodulated by an analog IQ demodulator, and after passing through a low-pass filter, the analog I signal and Q signal are obtained respectively, completing the signal demodulation process. The digital modulation transmission system usually adopts the architecture of an analog IQ modulator, but the IQ modulation function can also be implemented in a digital way, called a digital IQ modulator, which completes symbol mapping and IQ modulation on the digital side, and obtains a waveform with a carrier and then plays it directly through a DAC. The present invention proposes a signal isolation scheme for the signal isolation of the above-mentioned IQ signal at the boundary, which can be deployed and applied in power application scenarios such as substations, converter stations, and switchgears. By capturing the original signal at the edge of the internal coverage signal, and then delaying the received original signal by an odd multiple of half a cycle through the known frequency of the carrier signal, the delayed signal is sent, and the spatial signal fading is achieved by superposition of the delayed signal and the original signal, thereby achieving the purpose of isolating the signal outside the area.

[0036] See also Figure 5 In an embodiment of the present invention, a signal isolation device based on phase shift is provided, comprising: A receiving antenna is used to obtain the original analog time domain signal of the base station transmission signal in the signal coverage area reaching the edge of the signal coverage area; A delayed signal acquisition system, used for performing a half-cycle odd-number delay process on the acquired original analog time domain signal based on the center frequency of the base station transmission signal to obtain a delayed signal; The transmitting antenna is used to transmit a delayed signal so that the delayed signal is superimposed on the original analog time domain signal, thereby isolating the signal outside the area covered by the signal.

[0037] See also Figure 6 In a specific embodiment of the present invention, a signal isolation device based on phase shift is provided, which mainly consists of a receiving antenna, a radio frequency signal receiving module, a radio frequency signal analysis module, a radio frequency signal delay module, a radio frequency signal transmitting module and a transmitting antenna; wherein, The receiving antenna may be a directional antenna, with the main lobe of the receiving antenna facing the inside of the signal coverage area, for receiving the signal transmitted by the base station in the signal coverage area; The RF signal receiving module is used to receive the wireless analog time domain signal transmitted from the receiving antenna, and perform analog-to-digital conversion, digital sampling, signal power enhancement and other processing on the wireless analog time domain signal; The RF signal analysis module is used to analyze the center frequency of the base station transmission signal in the signal coverage area, and to analyze and process the power of the time domain signal, etc., to obtain the number of half-cycle sampling points based on the center frequency; The RF signal delay module is used to delay the half-cycle sampling point of the digitized RF time domain signal; The radio frequency signal transmitting module is used to convert the delayed digitized time domain signal into an analog signal.

[0038] The transmitting antenna may be a directional antenna, with the main lobe of the antenna pointing outside the signal coverage area.

[0039] Further exemplarily, in the space where the isolation device is deployed, the received original spatial IQ data, that is, the original signal, is expressed as: ; In the formula, It is the signal amplitude of the IQ signal sent by the wireless device and reaching the device after spatial transmission.

[0040] The isolation device delays the signal by an odd number of half a period through a physical delay link to form a delayed signal. , the delayed signal is equal to , after the original signal and the delayed signal are superimposed in the same space, it theoretically becomes 0, thereby achieving isolation of internal signal radiation to the outside.

[0041] Further explanation, since the signal amplitude inside the physical space is greater than the amplitude of the delayed signal, considering the directionality of the delayed signal, the delayed signal has a certain impact on the inside of the physical space, and a directional antenna can be used to reduce the impact. Explanation, because the transmitted signal is a time-varying signal, according to the principle of time-frequency conversion, the chip rate of the transmitted signal is theoretically consistent with the carrier bandwidth. For example, if a 20MHz carrier is used, the chip rate is 20M, and the carrier frequency (such as 2.4Ghz) is much larger than the chip rate. Therefore, by delaying half a cycle of the carrier frequency, the problems caused by the time-varying signal can be effectively resisted.

[0042] In the technical solution provided by the embodiment of the present invention, precise control of the half-cycle signal delay is achieved by presetting the inherent delay method; the input and output dual directional antennas can effectively ensure that the signals within the area are normal and the signals outside the area are isolated; by utilizing the technical solution disclosed in the present invention, isolation devices are placed at the boundary for known signals in the scene, so that the superiority of wireless transmission in power application scenarios can be fully utilized, and the data security in the power application scenarios can be guaranteed.

[0043] In one embodiment of the present invention, a computer device is provided, the computer device includes a processor and a memory, the memory is used to store a computer program, the computer program includes program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, and is specifically suitable for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding function; the processor described in the embodiment of the present invention can be used to perform the operation of the signal isolation method based on phase shift.

[0044] In one embodiment of the present invention, a storage medium is provided, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device for storing programs and data. It is understandable that the computer-readable storage medium here can include both built-in storage media in the computer device and, of course, extended storage media supported by the computer device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM (Random Access Memory) memory, or a non-volatile memory (non-volatile memory), such as at least one disk memory. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the signal isolation method based on phase offset in the above embodiment.

[0045] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program codes.

[0046] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0047] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0048] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A signal isolation method based on phase shift, characterized in that: The following steps are involved: Acquire the original analog time domain signal of the base station transmission signal in the signal coverage area reaching the edge of the signal coverage area; Based on the center frequency of the base station transmission signal, the acquired original analog time domain signal is delayed by an odd multiple of half a period to obtain a delayed signal; The delayed signal is superimposed on the original analog time domain signal to isolate the signal outside the area covered by the signal.

2. A signal isolation method based on phase shift according to claim 1, characterized in that: The step of performing a half-cycle odd-number delay process on the acquired original analog time domain signal based on the center frequency of the base station transmission signal to obtain a delayed signal comprises: Digitally sampling the original analog time domain signal to obtain a digitally sampled signal; Analyze the obtained digitally sampled signal to obtain the center frequency of the original analog time domain signal; based on the center frequency and the sampling frequency of the digital sampling, obtain the number of half-period sampling points based on the center frequency; The number of signal delay sampling points is calculated using the center frequency, sampling frequency, half-cycle sampling points and the preset inherent time delay; the digitally sampled signal is delayed and converted into digital-to-analog form according to the number of signal delay sampling points to obtain a delayed signal.

3. The signal isolation method based on phase shift according to claim 2, characterized in that: The calculation expression of the signal delay sampling points is: ； In the formula, The number of sampling points for signal delay; T is the inherent delay; is the center frequency; is the sampling frequency; n is the number of sampling points in half a period.

4. The signal isolation method based on phase shift according to claim 1, characterized in that: The original analog time domain signal is expressed as: ； In the formula, The original analog time domain signals are obtained respectively. I , Q The amplitude of the signal; is the center frequency; The delay signal is expressed as: ； In the formula, n is the number of sampling points in a half cycle; in, = .

5. A signal isolation device based on phase shift, characterized in that: include: A receiving antenna is used to obtain the original analog time domain signal of the base station transmission signal in the signal coverage area reaching the edge of the signal coverage area; A delayed signal acquisition system, used for performing a half-cycle odd-number delay process on the acquired original analog time domain signal based on the center frequency of the base station transmission signal to obtain a delayed signal; The transmitting antenna is used to transmit a delayed signal so that the delayed signal is superimposed on the original analog time domain signal, thereby isolating the signal outside the area covered by the signal.

6. The signal isolation device based on phase shift according to claim 5, characterized in that: The delayed signal acquisition system comprises: The radio frequency signal receiving module is used to digitally sample the original analog time domain signal to obtain a digitally sampled signal; The RF signal analysis module is used to analyze the obtained digitally sampled signal to obtain the center frequency of the original analog time domain signal; based on the center frequency and the sampling frequency of the digital sampling, obtain the number of half-period sampling points based on the center frequency; The RF signal delay module is used to calculate the number of signal delay sampling points using the center frequency, sampling frequency, half-cycle sampling points and preset inherent time delay; and to perform delay processing and digital-to-analog conversion on the digitally sampled signal according to the number of signal delay sampling points to obtain a delayed signal.

7. The signal isolation device based on phase shift according to claim 6, characterized in that: The calculation expression of the signal delay sampling points is: ； In the formula, The number of sampling points for signal delay; T is the inherent delay; is the center frequency; is the sampling frequency; n is the number of sampling points in half a period.

8. The signal isolation device based on phase shift according to claim 5, characterized in that: The original analog time domain signal is expressed as: ； In the formula, The original analog time domain signals are obtained respectively. I , Q The amplitude of the signal; is the center frequency; The delay signal is expressed as: ； In the formula, n is the number of sampling points in a half cycle; in, = .

9. The signal isolation device based on phase shift according to claim 5, characterized in that: The receiving antenna is a directional antenna, and the main lobe of the receiving antenna is oriented toward the inside of the signal coverage area; The transmitting antenna is a directional antenna, and the main lobe of the transmitting antenna is directed to the outside of the signal coverage area.

10. The signal isolation device based on phase shift according to claim 5, characterized in that: The signal isolation device is used to be deployed at the boundary of the signal coverage area.

11. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the signal isolation method based on phase shift according to any one of claims 1 to 4 is implemented.

12. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the signal isolation method based on phase shift according to any one of claims 1 to 4 is implemented.

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