High-frequency wireless signal detection method

Abstract

The invention belongs to the cross technical field of a wireless communication technology and a signal processing technology, and discloses a high-frequency wireless signal detection method, which specifically comprises the following steps of S1, preparation and initialization, S2, signal preprocessing and S3, result output and visualization. Compared with the prior art, remarkable advantages are shown by adopting the extremely simple circuit design indicated by the diodes and the LED lamps, the circuit structure is greatly simplified by simplifying to the most basic electronic elements, namely the diodes and the LEDs, the number of devices is reduced, the overall cost is reduced, complex software programming and IO control are not needed, and the circuit structure is simplified to the most basic electronic elements, namely the diodes and the LEDs. The design is better in stability, potential problems caused by software faults or configuration errors are reduced, and meanwhile the LED indicating function with high intuition is achieved.

Description

Technical Field

[0001] The present invention belongs to the cross-technical field of wireless communication technology and signal processing technology, and specifically relates to a method for detecting high-frequency wireless signals. Background Art

[0002] With the rapid development of wireless communication technology, high-frequency wireless signals are widely used in fields such as communications, satellites, and radars. The frequency band has risen to several GHz or even tens of GHz. Although it has enabled many cutting-edge applications, high-frequency signals have short wavelengths and complex propagation characteristics, which pose many challenges to signal detection and analysis. This requires continuous technological innovation to accurately capture and analyze these "light-speed secrets." At present, active circuit technology is widely used in the field of high-frequency wireless signal detection. With built-in power supplies and advanced chip processing capabilities, this technology achieves accurate amplification and efficient extraction of signals. However, the widespread application of this technology is also accompanied by strict requirements for the operating environment, such as stable power supply and high-performance active chip support. In certain specific situations, such as operations in extreme environments or application scenarios with extremely high low power requirements, the application of active circuits is significantly restricted. Summary of the invention

[0003] The purpose of the present invention is to provide a method for detecting high-frequency wireless signals to solve the problems raised in the above background technology.

[0004] In order to achieve the above object, the present invention provides the following technical solution: a method for detecting a high-frequency wireless signal, the specific steps of the detection method are as follows:

[0005] S1: Preparation and initialization: Ensure that the equipment is connected correctly, including the receiving circuit, processing unit, display and power supply, and initialize system parameters such as frequency range and gain;

[0006] S2: Signal preprocessing: filtering and denoising, amplifying low-frequency signals as needed, and improving processing accuracy and sensitivity;

[0007] S3: Result output and visualization; signal information is displayed on the display screen or LED light D2, and D2 lights up to indicate successful signal reception;

[0008] Preferably, the specific steps of preparation and initialization in S1 are as follows:

[0009] Step 1: Physical connection of devices

[0010] First, ensure that the high-frequency wireless receiving circuit, signal processing unit, and bidirectional LED lamp D2 display device perform operations: connect the output port of the high-frequency wireless receiving circuit to the input port of the signal processing unit according to the device manual or connection guide; then connect the output port of the signal processing unit to the control port of the bidirectional LED lamp D2; if the system requires external power, the output end of the power module must also be correctly connected to the device that needs power;

[0011] Preferably, the specific steps of signal preprocessing in S2 are as follows:

[0012] Step 1: Filtering

[0013] The converted low-frequency signal is input into the filter circuit. The main function of the filter circuit is to remove the noise and interference components in the signal. The noise and interference come from the external environment and the noise of the electronic components inside the equipment. By selecting a suitable filter, the useful part of the signal can be effectively retained, while suppressing or eliminating the noise and interference, and improving the signal-to-noise ratio of the signal;

[0014] Step 2: Signal amplification

[0015] The amplitude of the signal after filtering is still low, which is not enough to meet the requirements of the subsequent signal processing unit for the signal amplitude. Therefore, signal amplification is required. The function of the signal amplification circuit is to amplify the filtered signal to a certain amplitude range to improve the accuracy and sensitivity of signal processing. During the amplification process, it is necessary to ensure that the distortion of the signal is within an acceptable range to avoid introducing additional noise or nonlinear distortion.

[0016] Preferably, the result output and visualization in S3 means that after the signal detection and preprocessing are completed, the system will intuitively display the extracted signal information through an integrated display screen or a specific indicating device such as a bidirectional LED light D2. Once the bidirectional LED light D2 lights up, it serves as a clear signal to inform the user that the system has successfully captured and processed the target signal, ensuring real-time visualization and monitoring of the signal status.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The present invention has shown significant advantages by adopting a minimalist circuit design with diodes and LED lights as indicators. This solution has greatly simplified the circuit structure by streamlining it to the most basic electronic components - diodes and LEDs, which not only reduces the number of devices, but also reduces the overall cost. It does not require complex software programming and IO control. The design is more stable and reduces potential problems caused by software failures or configuration errors. At the same time, its intuitive LED indication function directly reflects the circuit status, which is convenient for rapid diagnosis and maintenance. Therefore, this minimalist circuit shows unique appeal in application scenarios that pursue cost-effectiveness, high reliability and easy maintainability.

[0019] 2. The present invention can efficiently detect high-frequency wireless signals by designing an environment without external power supply or inconvenient external power supply. Its characteristics are simple circuit, high reliability, low cost and easy disguise. It is suitable for wireless communication monitoring, radar detection, electronic warfare defense and EMC circuit design. By integrating advanced high-frequency signal information processing and extraction technology, the detection sensitivity and accuracy are significantly improved, providing strong technical support and solutions for related fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall process structure of the present invention;

[0021] Figure 2 This is a schematic diagram showing the effect of the LED lamp of the present invention;

[0022] Figure 3 This is a schematic diagram of the LED lamp of the present invention;

[0023] Figure 4 It is a schematic diagram of the overall circuit of the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figures 1 to 4 As shown, an embodiment of the present invention provides a method for detecting a high-frequency wireless signal, and the specific steps of the detection method are as follows:

[0026] S1: Preparation and initialization: Ensure that the equipment is connected correctly, including the receiving circuit, processing unit, display and power supply, and initialize system parameters such as frequency range and gain;

[0027] S2: Signal preprocessing: filtering and denoising, amplifying low-frequency signals as needed, and improving processing accuracy and sensitivity;

[0028] S3: Result output and visualization; signal information (type, frequency, amplitude) is displayed on the display screen or LED light D2, and D2 lights up to indicate successful signal reception;

[0029] The specific steps of preparation and initialization in S1 are as follows:

[0030] Step 1: Physical connection of devices

[0031] Task description: First, ensure that the interfaces and connecting cables of all devices (high-frequency wireless receiving circuit, signal processing unit, display device such as bidirectional LED light D2, and power module (if the receiving circuit or signal processing unit requires external power supply)) are intact;

[0032] Execution: Connect the output port of the high-frequency wireless receiving circuit to the input port of the signal processing unit according to the device manual or connection guide; then connect the output port of the signal processing unit to the control port of the display device (such as the bidirectional LED light D2); if the system requires an external power supply, the output end of the power module must also be correctly connected to the device that needs power supply;

[0033] The specific steps of signal preprocessing in S2 are as follows:

[0034] Step 1: Filtering

[0035] The converted low-frequency signal is input into the filter circuit. The main function of the filter circuit is to remove the noise and interference components in the signal, which may come from the external environment, the noise of the electronic components inside the equipment, etc. By selecting a suitable filter (such as a low-pass filter, a band-pass filter, etc.), the useful part of the signal can be effectively retained, while suppressing or eliminating noise and interference, and improving the signal-to-noise ratio of the signal.

[0036] Step 2: Signal amplification

[0037] The amplitude of the signal after filtering may still be low, insufficient to meet the signal amplitude requirements of the subsequent signal processing unit. Therefore, signal amplification is required. The function of the signal amplification circuit is to amplify the filtered signal to a certain amplitude range to improve the accuracy and sensitivity of signal processing. During the amplification process, it is necessary to ensure that the signal distortion is within an acceptable range to avoid introducing additional noise or nonlinear distortion.

[0038] The implementation of filtering and amplification steps significantly improves signal quality and processing efficiency. Filtering effectively removes noise interference and enhances signal purity; signal amplification ensures that the signal amplitude meets the standard and improves processing accuracy and sensitivity. The synergy of the two not only ensures the complete transmission of signal information, but also reduces the risk of distortion, providing high-quality data support for subsequent signal processing and decision-making, which is the key to improving the overall performance and reliability of the system.

[0039] The result output and visualization in S3 refers to that after the signal detection and preprocessing are completed, the system will visually display the extracted signal information (covering the signal type, precise frequency and amplitude value) through an integrated display screen or a specific indicating device such as a bidirectional LED light D2. Once the bidirectional LED light D2 lights up, it serves as a clear signal to inform the user that the system has successfully captured and processed the target signal, ensuring real-time visualization and monitoring of the signal status.

[0040] The implementation of result output and visualization has greatly enhanced the user experience and operational efficiency of the signal detection system. Through intuitive display methods such as integrated display screens and bidirectional LED lights, users can instantly obtain key information of the signal, such as type, frequency and amplitude, so as to quickly determine the system status. The clear indication of the bidirectional LED light not only simplifies the confirmation process of the signal reception status, but also improves the immediacy and accuracy of monitoring. This instant information feedback mechanism provides strong support for system maintenance, troubleshooting and subsequent decision-making, ensuring the efficiency and smoothness of the entire signal detection process.

[0041] When the system utilizes the spatial wireless transmission characteristics of high-frequency signals, the spatial coupling loop and the unique function of the detector diode D1 realize the effective conversion of high-frequency signals to low-frequency DC signals. D1 uses its nonlinear characteristics to only allow the positive half cycle of the high-frequency signal to pass through, forming a rectification-like effect, converting high-frequency fluctuations into a stable DC level. This DC signal then drives the bidirectional LED light D2, which emits light when the positive signal is effectively received, as a visual indication of signal reception. At the same time, the symmetrically placed diodes D2 and D1 work together to further optimize the reception effect of the antenna signal through the loop coupling mechanism, ensuring the integrity and stability of signal transmission.

[0042] LED lamp lighting power calculation

[0043] It is known that the voltage required to light up the LED lamp is 2V and the current is 1mA, so the required power is:

[0044] P1=U*I=2V*1mA=2mW

[0045] Convert to dBm

[0046]

[0047] Transmit power calculation

[0048] For a 2.4GHz high frequency signal, assuming the transmitting voltage is 5V and the current is 40mA, the transmitting power is:

[0049] P2=U*I=5V*40mA=200mW=0.2W

[0050] Convert to dBm:

[0051]

[0052] The relationship between the path loss L (dB) of the wireless signal and the transmit power and receive power is:

[0053] L=P2(dBm)-p1(dBm)

[0054] Substituting in the known values:

[0055] L=23.0103dBm-3.0103dBm=20dBm

[0056] The relationship between path loss L, distance d (km) and frequency f (MHz) is:

[0057] L=32.1+20l g d+20l g f

[0058] Substitute f = 2.4 GHz (i.e. 2400 MHz) and L = 20 dBm into the above equation to solve for d:

[0059] 20=32.1+20lgd+20lg2400

[0060] 20lgd=20-32.1-20lg2400

[0061] 20lgd=-12.1-67.6

[0062] 20lgd = -79.7

[0063] lgd=-3.985

[0064] d = 10 -7.865 ≈0.0001035km

[0065] d≈0.1035m

[0066] That is about 1.4cm, not 10cm as in the original answer.

[0067] Received energy density and antenna gain

[0068] The relationship between the received energy density and the antenna gain G, distance d and frequency f is:

[0069]

[0070] in, C is the speed of light.

[0071] Here we need to derive the calculation formula for L

[0072] First of all, we know that the transmission of wireless signals is scattered on a spherical surface in space. Assuming that the signal is transmitted outward in all directions in space, assuming that at L, the power density of the position where the sphere is located is

[0073] a=P / S=P / 4ΠR 2

[0074] S is the area of ​​the sphere. The formula for the area of ​​the sphere is S = 4ΠR 2

[0075] The effective area is a basic parameter that characterizes the antenna's ability to receive electromagnetic waves in space. The effective area S of the antenna is equal to the ratio of the power P at the antenna output to the radio flux density S of the incident plane wave.

[0076] It is a function of the direction and frequency of the received electromagnetic wave, indicating the ability of the receiving antenna to absorb radiation from any specific direction at this frequency and deliver power to the output end. The antenna effective area A and antenna gain G have the following relationship:

[0077] G / A=4Π / λ 2

[0078] The unit of λ is meter.

[0079] Received energy density: m = ES = (P / 4ΠR 2 )*(λ 2 G / 4Π)

[0080] Since wavelength is equal to the speed of light divided by frequency, λ = C / f

[0081] C=3*10 8 m / s

[0082] The above formula, if on a sphere with an energy unit of 1 and a distance of R, R = ES = (1 / 4ΠD 2 )*(C 2 / 4Πf 2 )

[0083] Using D to represent km and fMHZ to represent frequency, the above can be written as

[0084] R=ES=[1 / 4Π(10 3*D) 2 ]*((3*10 8 ) 2 / 4Π(10 6 *f) 2 )=(3 / 40Π) 2 *(1 / d) 2 *(1 / f) 2

[0085] Take the log of both sides of the equation 10 , expressed in db

[0086] Rr=10lgR=20lg(3 / 40Π)-20lgd-20lgf=-32.1-20lgd-20lgf

[0087] That is, L = 32.1 + 20lgd + 20lgf

[0088] Summarize

[0089] LED light lighting power: 200mW (or 3.0103dBm).

[0090] Transmitting power: 200mW (or 23.0103dBm).

[0091] Path loss and distance: At 2.4GHz, a signal of sufficient strength to light up an LED can theoretically be detected at about 1.4cm.

[0092] Received energy density: related to transmission power, distance, frequency and antenna gain.

[0093] Antenna gain: An important factor affecting received energy, which is proportional to the effective area of ​​the antenna.

[0094] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0095] By adopting the above technical solution disclosed in the present invention, the following beneficial effects are obtained:

[0096] 1. The present invention has shown significant advantages by adopting a minimalist circuit design with diodes and LED lights as indicators. This solution has greatly simplified the circuit structure by streamlining it to the most basic electronic components - diodes and LEDs, which not only reduces the number of devices, but also reduces the overall cost. It does not require complex software programming and IO control. The design is more stable and reduces potential problems caused by software failures or configuration errors. At the same time, its intuitive LED indication function directly reflects the circuit status, which is convenient for rapid diagnosis and maintenance. Therefore, this minimalist circuit shows unique appeal in application scenarios that pursue cost-effectiveness, high reliability and easy maintainability.

[0097] 2. The present invention can efficiently detect high-frequency wireless signals by designing an environment without external power supply or inconvenient external power supply. Its characteristics are simple circuit, high reliability, low cost and easy disguise. It is suitable for wireless communication monitoring, radar detection, electronic warfare defense and EMC circuit design. By integrating advanced high-frequency signal information processing and extraction technology, the detection sensitivity and accuracy are significantly improved, providing strong technical support and solutions for related fields.

[0098] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A method for detecting a high-frequency wireless signal, characterized in that: The specific steps of this detection method are as follows: S1: Preparation and initialization: Ensure that the equipment is connected correctly, including the receiving circuit, processing unit, display and power supply, and initialize the system parameters, including the frequency range and gain; S2: Signal preprocessing: filtering and denoising, amplifying low-frequency signals as needed, and improving processing accuracy and sensitivity; S3: Result output and visualization; signal information is displayed through the display screen or LED light D2, and D2 lights up to indicate successful signal reception.

2. The method for detecting a high-frequency wireless signal according to claim 1, characterized in that: The specific steps of preparation and initialization in S1 are as follows: Step 1: Physical connection of devices First, make sure that all interfaces and connecting cables of the high-frequency wireless receiving circuit, signal processing unit, LED light D2 display device and power module are intact; Execution: Connect the output port of the high-frequency wireless receiving circuit to the input port of the signal processing unit according to the equipment manual or connection guide; then connect the output port of the signal processing unit to the control port of the LED light D2; if the system requires external power, the output end of the power module must also be correctly connected to the device that needs power.

3. The method for detecting a high-frequency wireless signal according to claim 1, characterized in that: The specific steps of signal preprocessing in S2 are as follows: Step 1: Filtering The converted low-frequency signal is input into the filter circuit. The main function of the filter circuit is to remove the noise and interference components in the signal. The noise and interference come from the external environment and the noise of the electronic components inside the equipment. By selecting a suitable filter, the useful part of the signal can be effectively retained, while suppressing or eliminating the noise and interference, and improving the signal-to-noise ratio of the signal; Step 2: Signal amplification The amplitude of the signal after filtering is still low, which is not enough to meet the requirements of the subsequent signal processing unit for the signal amplitude. Therefore, signal amplification is required. The function of the signal amplification circuit is to amplify the filtered signal to a certain amplitude range to improve the accuracy and sensitivity of signal processing. During the amplification process, it is necessary to ensure that the distortion of the signal is within an acceptable range to avoid introducing additional noise or nonlinear distortion.

4. The method for detecting a high-frequency wireless signal according to claim 1, characterized in that: The result output and visualization in S3 means that after the signal detection and preprocessing are completed, the system will visually display the extracted signal information through an integrated display screen or a specific indicator device such as LED light D2. Once the LED light D2 lights up, it serves as a clear signal to inform the user that the system has successfully captured and processed the target signal, ensuring real-time visualization and monitoring of the signal status.

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