Mobile phone terminal signal shielding method based on DMRS

Abstract

The invention relates to the technical field of mobile phone terminal signal shielding, and discloses a DMRS-based mobile phone terminal signal shielding method, which comprises the following steps of: 1, scanning 5G signals in a target area by using signal analysis equipment, and identifying and analyzing DMRS signal characteristics sent by a base station; 2, reconstructing an analog signal highly similar to a DMRS signal of a base station by using a signal processing technology according to the DMRS parameter obtained in the step 1; 3, on the basis of the reconstructed DMRS, generating an induction signal by adding a phase deviation and frequency modulation interference mode; 4, adjusting the transmitting power of the induction signal according to the shielding requirement and the signal propagation characteristic of the target area; and step 5, utilizing an intelligent antenna or beam forming technology. The invention provides a DMRS (demodulation reference signal)-based mobile phone terminal signal shielding method, which solves the problems of high emission shielding requirement, low interference efficiency and high system complexity of the traditional shielding method.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile phone terminal signal shielding, and in particular to a mobile phone terminal signal shielding method based on DMRS. Background Art

[0002] DMRS is mainly used for channel estimation and signal recovery in the process of data demodulation. In the 5G system, DMRS is associated with the physical downlink shared channel to help the user equipment accurately recover the data information sent by the base station at the receiving end. In the field of mobile communications, mobile terminal signal shielding technology is mainly used in places where a quiet environment needs to be maintained or communication interference needs to be prevented, such as examination rooms, conference rooms, and confidential areas. Traditional mobile phone signal shielding methods mainly rely on transmitting white noise and pseudo-pilot sequence signals to interfere with the mobile phone's receiving signal so that it cannot correctly demodulate the base station data. However, with the development of 5G communication technology, its signal bandwidth is wider and the introduction of multi-antenna beamforming technology has significantly enhanced the anti-interference ability of the 5G system. When facing 5G signals, traditional shielding methods often require extremely high transmission power and system complexity, and the effect is not ideal; Problems with existing technologies: 1. High transmit power requirement: Traditional shielding methods require a transmit power several times higher than that of the base station to effectively interfere with 5G signals, which results in extremely high energy consumption and is difficult to implement; 2. Low energy efficiency ratio: Due to the need for high-power transmission, the energy efficiency is relatively low, which is not conducive to long-term use; 3. High system complexity: The introduction of multiple antennas and beamforming makes the signal processing technology of 5G systems more complex, and traditional shielding methods are difficult to effectively deal with; 4. Low interference efficiency: Existing technologies have limited interference effects on 5G signals and often cannot completely block mobile phone communications.

[0003] In order to solve the above problems, this application proposes a mobile phone terminal signal shielding method based on DMRS. Summary of the invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a mobile phone terminal signal shielding method based on DMRS.

[0005] The present invention proposes a method for shielding mobile phone terminal signals based on DMRS, comprising the following steps: Step 1: Use signal analysis equipment to scan the 5G signal in the target area, identify and analyze the DMRS signal characteristics sent by the base station; Step 2: Based on the DMRS parameters obtained in step 1, a signal processing technology is used to reconstruct an analog signal that is highly similar to the base station DMRS signal; Step 3: Based on the reconstructed DMRS signal, the induced signal is generated by adding phase offset and frequency modulation interference pattern; Step 4: Adjust the transmission power of the induced signal according to the shielding requirements and signal propagation characteristics of the target area; Step 5: Use smart antennas or beamforming technology to transmit the induced signal to the mobile phone terminals in the target area in a direction to enhance the interference effect on mobile phone signals in a specific direction; Step 6: Set up a monitoring system to monitor the communication status of mobile terminals in real time, evaluate the interference effect by receiving the signal sent by the mobile phone when trying to access the base station, and adjust the parameters of the induced signal according to the feedback results; Step 7: According to the feedback from step 6, dynamically adjust the transmission power, frequency, and timing parameters of the induced signal to adapt to the changes in the base station signal; Step 8: Regularly evaluate and optimize system performance and update interference strategies to adapt to evolving 5G technologies and new communication standards.

[0006] Preferably, step one includes the following method: S1. Use a spectrum analyzer or signal monitoring device to perform a broadband scan of the 5G frequency band in the target area. S2. Identify the characteristics of the DMRS signal, such as sequence mode, time slot position, symbol index, and subcarrier allocation, by demodulating and analyzing the captured signal; S3. Use signal processing algorithms, such as fast Fourier transform (FFT) and correlation detection, to extract the frequency and timing key parameters of the DMRS signal.

[0007] Preferably, step 2 includes the following method: S1. Generate a simulated DMRS signal using digital signal processing technology, such as a digital signal processing DSP chip or software algorithm, according to the DMRS parameters obtained in step 1; S2. During the reconstruction process, it is necessary to ensure that the timing and phase of the signal are highly consistent with the DMRS signal sent by the base station to simulate the real signal environment.

[0008] Preferably, step three includes the following method: S1. Based on the reconstructed DMRS signal, the induced signal is generated by introducing interference patterns of random phase offset, frequency modulation, and amplitude modulation; S2. These interference patterns are designed to interfere with the channel estimation and signal demodulation process of the mobile terminal to the greatest extent.

[0009] Preferably, step 4 includes the following method: S1. Use power control algorithm to adjust the transmission power of the induced signal according to the shielding requirements and signal propagation characteristics of the target area, such as path loss and obstacles; S2. Evaluate the interference effect under different powers through simulation or actual testing to find the optimal power point that can meet the shielding requirements and maintain low energy consumption.

[0010] Preferably, step five includes the following method: S1. Use smart antenna array or beamforming technology to transmit the induced signal in a directionally manner; S2. By adjusting the phase and amplitude weights of the antenna array, a narrow beam pointing to the target area is formed to enhance the interference effect on mobile phone signals in a specific direction.

[0011] Preferably, step six includes the following method: S1. Set up a special monitoring system to monitor the communication status of mobile terminals in the target area in real time; S2, evaluating the interference effect by receiving signals sent by mobile phones when they try to access the base station, such as random access preambles and scheduling requests; S3. Use feedback control algorithm to automatically adjust the parameters of the induced signal according to the monitoring results.

[0012] Preferably, step seven includes the following steps: S1. According to the feedback result of step 6, the transmission power, frequency and timing parameters of the induced signal are dynamically adjusted by using an adaptive control algorithm; S2. Through continuous iteration and optimization, find the best interference strategy to cope with changes in base station signals.

[0013] Preferably, step eight includes the following method: S1. Regularly conduct a comprehensive performance evaluation of the system, including interference effects, energy consumption, and stability; S2. Update and optimize system software based on the evaluation results to adapt to the evolving 5G technology and new communication standards; S3. Perform necessary maintenance and care on hardware equipment to ensure its long-term stable operation.

[0014] The above technical solution of the present invention has the following beneficial technical effects: 1. Low transmit power requirement: By accurately interfering with DMRS signals, the requirement for transmit power is greatly reduced, thus improving energy efficiency. 2. High efficiency: Since the interference is directly targeted at the DMRS signal, the interference efficiency is improved, so that the ideal shielding effect can be achieved at a lower power; 3. Reduced system complexity: Compared with traditional methods, this method can achieve effective shielding without complex signal processing technology, reducing the complexity of system implementation; 4. Significant interference effect: Through directional transmission and adaptive adjustment strategies, it ensures continuous and effective interference to mobile terminal signals, solving the problem of low interference efficiency in existing technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention provides a flow chart of a method for shielding mobile phone terminal signals based on DMRS. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0017] like Figure 1 As shown, a mobile terminal signal shielding method based on DMRS proposed by the present invention comprises the following steps: Step 1: Use signal analysis equipment to scan the 5G signal in the target area, identify and analyze the DMRS signal characteristics sent by the base station; Step 2: Based on the DMRS parameters obtained in step 1, a signal processing technology is used to reconstruct an analog signal that is highly similar to the base station DMRS signal; Step 3: Based on the reconstructed DMRS signal, the induced signal is generated by adding phase offset and frequency modulation interference pattern; Step 4: Adjust the transmission power of the induced signal according to the shielding requirements and signal propagation characteristics of the target area; Step 5: Use smart antennas or beamforming technology to transmit the induced signal to the mobile phone terminals in the target area in a direction to enhance the interference effect on mobile phone signals in a specific direction; Step 6: Set up a monitoring system to monitor the communication status of mobile terminals in real time, evaluate the interference effect by receiving the signal sent by the mobile phone when trying to access the base station, and adjust the parameters of the induced signal according to the feedback results; Step 7: According to the feedback from step 6, dynamically adjust the transmission power, frequency, and timing parameters of the induced signal to adapt to the changes in the base station signal; Step 8: Regularly evaluate and optimize system performance and update interference strategies to adapt to evolving 5G technologies and new communication standards.

[0018] In a specific embodiment, step one includes the following method: S1. Use a spectrum analyzer or signal monitoring device to perform a broadband scan of the 5G frequency band in the target area. S2. Identify the characteristics of the DMRS signal, such as sequence mode, time slot position, symbol index, and subcarrier allocation, by demodulating and analyzing the captured signal; S3. Use signal processing algorithms, such as fast Fourier transform (FFT) and correlation detection, to extract the frequency and timing key parameters of the DMRS signal.

[0019] It should be noted that the specific algorithm steps are as follows: FFT transformation: Perform fast Fourier transform on the extracted DMRS signal to obtain its spectrum characteristics; Frequency estimation: Determine the main frequency component of the DMRS signal through spectrum analysis as the frequency parameter of the signal; Timing estimation: Use correlation detection algorithms, such as the sliding window correlation method, to match the preset DMRS sequence template to determine the timing position of the signal, such as the time slot and symbol index.

[0020] In a specific embodiment, step 2 includes the following method: S1. Generate a simulated DMRS signal using digital signal processing technology, such as a digital signal processing DSP chip or software algorithm, according to the DMRS parameters obtained in step 1; S2. During the reconstruction process, it is necessary to ensure that the timing and phase of the signal are highly consistent with the DMRS signal sent by the base station to simulate the real signal environment.

[0021] It should be noted that: it provides a basis for the generation of the induced signal and ensures that the interference signal and the real DMRS signal are similar at the physical layer, thereby improving the interference effect.

[0022] In a specific embodiment, step three includes the following method: S1. Based on the reconstructed DMRS signal, the induced signal is generated by introducing interference patterns of random phase offset, frequency modulation, and amplitude modulation; S2. These interference patterns are designed to interfere with the channel estimation and signal demodulation process of the mobile terminal to the greatest extent.

[0023] It should be noted that: generating an induction signal with an interference effect destroys the accurate estimation of the DMRS signal by the mobile terminal, thereby achieving the purpose of signal shielding.

[0024] In a specific embodiment, step 4 includes the following method: S1. Use power control algorithm to adjust the transmission power of the induced signal according to the shielding requirements and signal propagation characteristics of the target area, such as path loss and obstacles; S2. Evaluate the interference effect under different powers through simulation or actual testing to find the optimal power point that can meet the shielding requirements and maintain low energy consumption.

[0025] It should be noted that: ensure that the induced signal has sufficient interference strength in the target area while avoiding unnecessary energy waste.

[0026] In a specific embodiment, step five includes the following method: S1. Use smart antenna array or beamforming technology to transmit the induced signal in a directionally manner; S2. By adjusting the phase and amplitude weights of the antenna array, a narrow beam pointing to the target area is formed to enhance the interference effect on mobile phone signals in a specific direction.

[0027] It should be noted that: improve the concentration and directionality of the interference signal and reduce interference to other non-target areas.

[0028] In a specific embodiment, step six includes the following method: S1. Set up a special monitoring system to monitor the communication status of mobile terminals in the target area in real time; S2, evaluating the interference effect by receiving signals sent by mobile phones when they try to access the base station, such as random access preambles and scheduling requests; S3. Use feedback control algorithm to automatically adjust the parameters of the induced signal according to the monitoring results.

[0029] It should be noted that: the interference effect should be grasped in real time to ensure that the system can dynamically adapt to the changes in base station signals:.

[0030] In a specific embodiment, step seven includes the following steps: S1. According to the feedback result of step 6, the transmission power, frequency and timing parameters of the induced signal are dynamically adjusted by using an adaptive control algorithm; S2. Through continuous iteration and optimization, find the best interference strategy to cope with changes in base station signals.

[0031] It should be noted that: ensure that the jammer system can continue to effectively interfere with the communications of mobile terminals and maintain a stable jammer effect even when the base station signal changes.

[0032] In a specific embodiment, step eight includes the following method: S1. Regularly conduct a comprehensive performance evaluation of the system, including interference effects, energy consumption, and stability; S2. Update and optimize system software based on the evaluation results to adapt to the evolving 5G technology and new communication standards; S3. Perform necessary maintenance and care on hardware equipment to ensure its long-term stable operation.

[0033] It should be noted that the system should maintain its advancement and competitiveness, and ensure that it can continue to effectively respond to new communication technologies and challenges.

[0034] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A mobile terminal signal shielding method based on DMRS, characterized in that: The following steps are involved: Step 1: Use signal analysis equipment to scan the 5G signal in the target area, identify and analyze the DMRS signal characteristics sent by the base station; Step 2: Based on the DMRS parameters obtained in step 1, a signal processing technology is used to reconstruct an analog signal that is highly similar to the base station DMRS signal; Step 3: Based on the reconstructed DMRS signal, the induced signal is generated by adding phase offset and frequency modulation interference pattern; Step 4: Adjust the transmission power of the induced signal according to the shielding requirements and signal propagation characteristics of the target area; Step 5: Use smart antennas or beamforming technology to transmit the induced signal to the mobile phone terminals in the target area in a direction to enhance the interference effect on mobile phone signals in a specific direction; Step 6: Set up a monitoring system to monitor the communication status of mobile terminals in real time, evaluate the interference effect by receiving the signal sent by the mobile phone when trying to access the base station, and adjust the parameters of the induced signal according to the feedback results; Step 7: According to the feedback from step 6, dynamically adjust the transmission power, frequency, and timing parameters of the induced signal to adapt to the changes in the base station signal; Step 8: Regularly evaluate and optimize system performance and update interference strategies to adapt to evolving 5G technologies and new communication standards.

2. A method for shielding mobile phone terminal signals based on DMRS according to claim 1, characterized in that: The following methods are included in step one: S1. Use a spectrum analyzer or signal monitoring device to perform a broadband scan of the 5G frequency band in the target area. S2. Identify the characteristics of the DMRS signal, such as sequence mode, time slot position, symbol index, and subcarrier allocation, by demodulating and analyzing the captured signal; S3. Use signal processing algorithms, such as fast Fourier transform (FFT) and correlation detection, to extract the frequency and timing key parameters of the DMRS signal.

3. A method for shielding mobile phone terminal signals based on DMRS according to claim 2, characterized in that: Step 2 includes the following methods: S1. Generate a simulated DMRS signal using digital signal processing technology, such as a digital signal processing DSP chip or software algorithm, according to the DMRS parameters obtained in step 1; S2. During the reconstruction process, it is necessary to ensure that the timing and phase of the signal are highly consistent with the DMRS signal sent by the base station to simulate the real signal environment.

4. A method for shielding mobile phone terminal signals based on DMRS according to claim 3, characterized in that: Step three includes the following methods: S1. Based on the reconstructed DMRS signal, the induced signal is generated by introducing interference patterns of random phase offset, frequency modulation, and amplitude modulation; S2. These interference patterns are designed to interfere with the channel estimation and signal demodulation process of the mobile terminal to the greatest extent.

5. A method for shielding mobile terminal signals based on DMRS according to claim 4, characterized in that: Step 4 includes the following methods: S1. Use a power control algorithm to adjust the transmission power of the induced signal according to the shielding requirements and signal propagation characteristics of the target area, such as path loss and obstacles; S2. Evaluate the interference effect under different powers through simulation or actual testing to find the optimal power point that can meet the shielding requirements and maintain low energy consumption.

6. A method for shielding mobile phone terminal signals based on DMRS according to claim 5, characterized in that: Step five includes the following methods: S1. Use smart antenna array or beamforming technology to transmit the induced signal in a directionally manner; S2. By adjusting the phase and amplitude weights of the antenna array, a narrow beam pointing to the target area is formed to enhance the interference effect on mobile phone signals in a specific direction.

7. A method for shielding mobile phone terminal signals based on DMRS according to claim 6, characterized in that: Step six includes the following methods: S1. Set up a special monitoring system to monitor the communication status of mobile terminals in the target area in real time; S2, evaluating the interference effect by receiving signals sent by mobile phones when they try to access the base station, such as random access preambles and scheduling requests; S3. Use feedback control algorithm to automatically adjust the parameters of the induced signal according to the monitoring results.

8. A method for shielding mobile phone terminal signals based on DMRS according to claim 7, characterized in that: Step seven includes the following steps: S1. According to the feedback result of step 6, the transmission power, frequency and timing parameters of the induced signal are dynamically adjusted using an adaptive control algorithm; S2. Through continuous iteration and optimization, find the best interference strategy to cope with changes in base station signals.

9. A method for shielding mobile phone terminal signals based on DMRS according to claim 8, characterized in that: Step eight includes the following methods: S1. Regularly conduct a comprehensive performance evaluation of the system, including interference effects, energy consumption, and stability; S2. Update and optimize system software based on the evaluation results to adapt to the evolving 5G technology and new communication standards; S3. Perform necessary maintenance and care on hardware equipment to ensure its long-term stable operation.

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