A method for short-range transmission of communication protocol information

Abstract

This invention discloses a short-range transmission method for communication protocol information. A signal base station is constructed by building an antenna element array at the archaeological site. The antenna elements use beamforming to capture electromagnetic wavebands propagating in the air in either omnidirectional or directional directions, preferentially selecting suitable electromagnetic wavebands for enhancement. In response to these electromagnetic wavebands, a signal processing unit processes the electromagnetic wavebands to obtain the target signal. The signal processing unit improves the quality of the electromagnetic wavebands to obtain the target signal. The target signal is then output to the target device via the antenna element array. This solves the technical problems in existing technologies where increasing signal power easily exacerbates signal scattering and attenuation, and the use of specific frequencies is limited by the electromagnetic environment at the site, making it difficult to find completely interference-free frequency bands.

Description

Technical Field

[0001] This invention relates to the field of communication transmission technology, and specifically to a method for short-range transmission of communication protocol information. Background Technology

[0002] Short-range wireless communication (NRW) technologies are commonly used for data exchange over short distances. They are widely applied in personal devices, IoT applications, payment systems, smart homes, health monitoring, archaeology, marine research, and other scenarios requiring low-power, low-cost, and high-efficiency communication. In archaeology, for example, NRW has become a crucial tool for collecting, transmitting, and analyzing on-site data, assisting archaeologists in real-time monitoring of site environmental changes, recording discoveries, and facilitating effective communication among team members. However, the unique environmental conditions at archaeological sites, such as metallic remains, stone structures, soil moisture, and vegetation cover, severely interfere with wireless signals, leading to data transmission instability and packet loss, significantly impacting the efficiency and data integrity of archaeological work.

[0003] While some anti-interference wireless communication schemes exist in the existing technology, such as using electromagnetic waves of specific frequencies, increasing signal power, and adopting multipath transmission strategies, these methods often have limited effectiveness under the complex conditions of archaeological sites. Increasing signal power can easily exacerbate signal scattering and attenuation, and using specific frequencies is also limited by the electromagnetic environment at the site, making it difficult to find a frequency band completely free from interference. Therefore, it is urgent to design a communication protocol information short-range transmission method with strong anti-interference capabilities to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a method for short-range transmission of communication protocol information, in order to solve the technical problems in the prior art where increasing signal power easily aggravates signal scattering and attenuation, and the use of specific frequencies is also limited by the electromagnetic environment at the site, making it difficult to find a frequency band that is completely free from interference.

[0005] The technical solution of this invention is implemented as follows:

[0006] A method for short-range transmission of communication protocol information, the method comprising the following steps:

[0007] Step S1: Construct an antenna element array at the archaeological site;

[0008] Step S2: Capture the electromagnetic waveband propagating in the air through beamforming of the antenna element in an omnidirectional or directional manner;

[0009] Step S3: In response to the electromagnetic band, the electromagnetic band is processed by the signal processing unit to obtain the target signal;

[0010] Step S4: Use the antenna element array to output the target signal to the target device.

[0011] A further technical solution is that, in step S1: an antenna element array is constructed at the site, and the specific construction steps are as follows:

[0012] Step S101: Use drones to take aerial photos of the site mapping with preset antenna elements;

[0013] Step S102: Select high-altitude landmarks around the site and low-altitude landmarks corresponding to the high altitudes based on the survey map;

[0014] Step S103: Set multiple antenna elements in the high-altitude landmark and the low-altitude landmark array;

[0015] Step S104: Form a linear array, planar array, or three-dimensional array based on the plurality of antenna element arrays.

[0016] A further technical solution is that, in step S101, a drone is used to take aerial photos of the site of the preset antenna element. This includes the drone carrying one or more of a multispectral camera, a thermal imager, a hyperspectral camera, and an RGB camera to take aerial photos of the site of the preset antenna element, and the drone transmits the aerial photos to a database to generate the survey map.

[0017] A further technical solution is that, in step S2, the step of directionally capturing electromagnetic wavebands propagating in the air through beamforming of the antenna element array includes:

[0018] Step S201: Determine the direction of the weak signal within the site;

[0019] Step S202: The antenna element calculates the phase shift and superimposes the received signals in phase at the output end;

[0020] Step S203: Before the antenna element signal is transmitted or received, the signal phase and intensity are adjusted by the phase controller and amplitude controller;

[0021] Step S204: In response to step S203, the signals received by the antenna element are combined at the receiver input.

[0022] A further technical solution is that, in step S2, the step of omnidirectionally capturing electromagnetic wavebands propagating in the air through beamforming of the antenna element array includes:

[0023] Step S211: Output the signal phases between the antenna element arrays in a consistent and uniform manner;

[0024] Step S212: Adjust the signal amplitude of each of the antenna element arrays;

[0025] Step S213: In response to the adjustment of the signal phase and the signal amplitude, the signals of the antenna element array are combined.

[0026] A further technical solution is that the beamforming is optimized using the recursive least squares method.

[0027] A further technical solution is that the beamforming is optimized using a recursive least squares method, with the following steps:

[0028] Step S221: Initialize the beamforming weight vector and error covariance matrix;

[0029] Step S222: At each time step, receive the input beamforming vector and the desired output;

[0030] Step S223: Calculate the beamforming prediction error;

[0031] Step S224: Update the beamforming error covariance matrix;

[0032] Step S225: Update the beamforming weight vector described in step S221;

[0033] Step S226: Repeat steps S222-S225 for training.

[0034] A further technical solution is that, in step S3, the signal processing unit analyzes and processes the electromagnetic band to obtain the target signal. The specific steps are as follows:

[0035] Step S301: Convert the electromagnetic band into a digital signal using an analog-to-digital converter;

[0036] Step S302: Apply a digital bandpass filter to remove unwanted frequency bands from the digital signal and retain the standard frequency bands in the digital signal;

[0037] Step S303: Use the deconvolution algorithm to restore the initial state of the digital signal in step S302;

[0038] Step S304: Use a post-filter to smooth the digital signal from step 303;

[0039] Step S305: Convert the digital signal from step S304 back to an analog signal using a digital-to-analog converter.

[0040] A further technical solution is to obtain the target signal through steps S301-S305, and store the target signal in a database.

[0041] A further technical solution is that, in step S4, the target device includes a PC, a mobile phone, a tablet, and a walkie-talkie.

[0042] The beneficial effects of this invention are as follows:

[0043] 1. This invention constructs a signal base station by building an antenna element array at the archaeological site. The antenna elements use beamforming to capture electromagnetic wavebands propagating in the air in an omnidirectional or directional manner, and select suitable electromagnetic wavebands for enhancement. In response to these electromagnetic wavebands, a signal processing unit processes the electromagnetic wavebands to obtain the target signal. The signal processing unit is used to improve the quality of the electromagnetic wavebands to obtain the target signal. The target signal is then output to the target device through the antenna element array. This solves the technical problems in the prior art where increasing signal power easily aggravates signal scattering and attenuation, and the use of specific frequencies is also limited by the electromagnetic environment at the site, making it difficult to find a frequency band that is completely free from interference.

[0044] 2. Aerial photography of the site is conducted using drones, and the resulting image data is stored in a database. This image data is then used to create a site map. Multiple devices, including multispectral cameras, thermal imagers, hyperspectral cameras, and RGB cameras, are employed to acquire the geological structure and characteristics of the site, facilitating antenna component deployment. The antenna components use beamforming to capture omnidirectional or directional electromagnetic waves propagating in the air, adjusting signal phase and intensity to obtain enhanced electromagnetic bands. Under signal processing, beamforming performance is optimized, improving the computational power for capturing electromagnetic bands. With algorithm-weighted beamforming, rapid response calculations are performed to obtain high-quality target signals, which are stored in the database. When appropriate, the target signals are transmitted via the antenna components to various target devices, including PCs, mobile phones, tablets, and walkie-talkies. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the overall method flow of the present invention;

[0046] Figure 2 This is a schematic diagram of the method for constructing an antenna element array according to the present invention;

[0047] Figure 3 This is a schematic flowchart of the method for directional capture of electromagnetic wavebands propagating in the air using antenna element beamforming according to the present invention.

[0048] Figure 4 This is a schematic diagram of the method for omnidirectional capture of electromagnetic bands propagating in the air using antenna element beamforming according to the present invention.

[0049] Figure 5 This is a schematic diagram of the optimization method for beamforming in this invention using recursive least squares.

[0050] Figure 6This is a schematic diagram of the method for processing electromagnetic bands to obtain target signals by the signal processing unit of the present invention. Detailed Implementation

[0051] To better understand the technical content of this invention, specific embodiments are provided below, and the invention will be further described in conjunction with the accompanying drawings.

[0052] This invention provides a method for short-range transmission of communication protocol information. The method comprises the following steps: constructing an antenna element array at the archaeological site; capturing electromagnetic wavebands propagating in the air using omnidirectional or directional beamforming of the antenna elements; processing the electromagnetic wavebands in response to the electromagnetic wavebands to obtain a target signal using a signal processing unit; and outputting the target signal to a target device using the antenna element array.

[0053] This invention constructs a signal base station by building an antenna element array at the archaeological site. The antenna elements use beamforming to capture electromagnetic waves propagating in the air in either omnidirectional or directional directions, selecting suitable electromagnetic waves for enhancement. In response to these electromagnetic waves, a signal processing unit processes the waves to obtain the target signal. This signal processing unit improves the quality of the electromagnetic waves to obtain the target signal, which is then output to the target device via the antenna element array. This solves the technical problems in existing technologies where increasing signal power easily exacerbates signal scattering and attenuation, and the use of specific frequencies is limited by the electromagnetic environment at the site, making it difficult to find a completely interference-free frequency band.

[0054] This invention provides a method for short-range transmission of communication protocol information, which includes the following steps:

[0055] join Figure 1-2 Step S1: Construct an antenna element array at the site;

[0056] Specifically, the site is mapped using drone aerial photography with pre-set antenna elements; high-altitude landmarks and corresponding low-altitude landmarks around the site are selected based on the mapping; multiple antenna elements are set up in the array of high-altitude and low-altitude landmarks; and a linear array, planar array, or three-dimensional array is formed based on the array of multiple antenna elements.

[0057] In antenna arrays, antenna elements are typically arranged in a specific layout, such as linear, planar, or three-dimensional arrays. Through phase and amplitude control, beamforming can be achieved, thereby enhancing signals in desired directions or suppressing signals in unwanted directions. The design and layout of antenna elements directly affect the performance of the antenna array, including gain, radiation pattern, bandwidth, and polarization characteristics. Among these, parabolic or helical antennas are used to receive satellite communication signals. High-altitude landmarks refer to the relatively high terrain where the archaeological site is located; placing antenna elements at this location facilitates signal reception, while placing corresponding antenna elements at relatively low-lying terrain improves the return signal performance.

[0058] In addition, the site mapping using drone aerial photography of pre-set antenna elements includes drones carrying one or more of the following: multispectral cameras, thermal imagers, hyperspectral cameras, and RGB cameras, used to photograph the site of the pre-set antenna elements, and the drones transmit the aerial images to a database to generate the mapping map.

[0059] Multispectral cameras can capture light of different wavelengths, including visible, near-infrared, and red-edge bands. They are used to assess vegetation health because plants have a much higher reflectivity in the near-infrared band than in visible light, facilitating selective protection during site development.

[0060] Thermal imagers can detect the heat emitted by objects, used to identify differences in soil moisture and underground structures. Metals and rocks have different thermal properties at different temperatures, and thermal imagers can identify potential metallic remains or stone structures beneath the surface, directly aiding archaeological excavations and allowing for optimal excavation choices based on the location of metallic remains or stone structures.

[0061] Hyperspectral cameras can provide finer wavelength resolution, distinguishing different types of materials, including different kinds of rock and soil components, which is very useful for archaeological applications.

[0062] RGB cameras can provide high-resolution color images, which are valuable for recording the appearance of the site and for subsequent mapping.

[0063] In a preferred embodiment, participants Figure 1 and Figure 3 Step S2: Capture electromagnetic wavebands propagating in the air by beamforming the antenna elements in an omnidirectional or directional manner;

[0064] Specifically, the direction of weak signals within the site is determined; the antenna element calculates the phase shift and superimposes the received signals in phase at the output; before being transmitted or received, the antenna element signal undergoes phase and amplitude control to adjust the signal phase and intensity; in response to the phase and amplitude control adjusting the antenna element signal before being transmitted or received, the signals received by the antenna element are combined at the receiver input.

[0065] For example, calculating the phase shift ensures that the signals received by all antenna elements are in phase at the receiving point, enhancing the signal in a specific direction while weakening the signal in other directions. The phase shift of an antenna element relative to another antenna element is calculated using the following formula:

[0066]

[0067] Where n is the antenna element number, d is the antenna spacing, λ is the signal wavelength, and θ is the beam pointing angle. In one example, the beam pointing angle of the second antenna element is θ = 22°, d = 10cm, and λ = 5cm. Therefore, the phase offset Ф2 of the second antenna element is 2π × 2 × 0.375 × 1 = 1.5π. The optimal pointing angle θ is selected accordingly to obtain the optimal phase offset.

[0068] The direction of weak signals within the site can be determined by prior information or by scanning different directions to find the direction of the strongest signal. To ensure that the signals received by all antenna elements are in phase at the output, the phase offset must be calculated for each antenna element.

[0069] Before a signal is transmitted or received, it passes through a phase controller and an amplitude controller. The phase controller adjusts the phase of the signal, while the amplitude controller adjusts the signal strength.

[0070] In receive mode, the signals from all antenna elements are combined at the receiver input after phase and amplitude adjustments. This amplifies the signal from the target direction, while signals from other directions cancel each other out due to phase differences.

[0071] In a preferred embodiment, participants Figure 1 and Figure 4 Step S2: Capture electromagnetic wavebands propagating in the air by beamforming the antenna elements in an omnidirectional or directional manner;

[0072] Specifically, the signal phases of the antenna element arrays are output uniformly and consistently; the signal amplitude of each antenna element array is adjusted; and the signals of the antenna element arrays are combined in response to the adjustment of the signal phase and signal amplitude.

[0073] In omnidirectional mode, phase adjustment is not required to form a beam pointing in a specific direction. However, it is necessary to ensure phase consistency between all antenna elements to avoid any unnecessary signal loss or interference. The amplitude of each antenna element also needs to be adjusted to ensure uniform output across the entire array, preventing signal congestion in other directions that could affect output efficiency.

[0074] In receive mode, the signals from all antenna elements are simply combined together without directional phase adjustment, and the signals are directly superimposed to increase the overall receive sensitivity.

[0075] Preferably, see Figure 1 and Figure 5 Beamforming is optimized using recursive least squares (RLS), an online algorithm used to progressively estimate unknown parameters and adjust the weights of the antenna array during beamforming. RLS can quickly respond to changes in the site environment and improve beamforming performance.

[0076] For example:

[0077] Step S221: Initialize the beamforming weight vector W(0) and the error covariance matrix P(0), where P(0) is usually set as a large diagonal matrix, indicating that the uncertainty of parameter estimation is high in the initial state;

[0078] Step S222: At each time step K, receive the input beamforming vector x(k) and the desired output d(k), where the input vector x(k) contains the received signal of the antenna array and d(k) is the reference signal;

[0079] Step S223: Calculate the beamforming prediction error, including:

[0080] 1. Predict the output using the current weight vector w(k-1):

[0081]

[0082] 2. Calculate the prediction error e(k):

[0083]

[0084] Step S224: Update the beamforming error covariance matrix p(k) using the following formula:

[0085]

[0086] Here, λ is the forgetting factor, which is used to control the degree of influence of past data. The range of λ is 0.9-0.999.

[0087] Step S225: Update the beamforming weight vector w(k) in step S221 using the following formula:

[0088] w(k)=w(k-1)+p(k)x(k)e(k);

[0089] The input vector x(k) needs to be orthogonal or at least full rank to ensure the stability and convergence of the algorithm.

[0090] Step S226: Repeat steps S222-S225 until the predetermined stopping condition is reached, so as to reduce the number of iterations or the prediction error to a sufficiently small value, achieve optimal beamforming, and improve its performance.

[0091] Step S3 (refer to) Figure 1 and Figure 6 : In response to the electromagnetic wave band, the target signal is obtained by processing the electromagnetic wave band through the signal processing unit;

[0092] Specifically, the electromagnetic wave band is converted into a digital signal using an analog-to-digital converter; a digital bandpass filter is applied to remove unwanted frequency bands from the digital signal, retaining the standard frequency bands; a deconvolution algorithm is used to restore the initial state of the digital signal from step S302; a post-filter is used to smooth the digital signal from step S303; and the digital signal from step S304 is converted back into an analog signal using a digital-to-analog converter. Through steps S301-S305, the target signal is obtained and stored in a database.

[0093] Analog-to-digital converters (ADCs) are used to convert analog electromagnetic signals into digital signals, ensuring the sampling frequency is at least twice the highest frequency of the signal according to the Nyquist sampling theorem. Digital bandpass filters are applied to remove unwanted frequency bands, retaining only the useful ones. Adaptive filtering algorithms are used to identify and suppress background noise and interference. When signal distortion exists, deconvolution algorithms are applied to restore the original signal characteristics. If the signal is affected by the Doppler effect, deconvolution can compensate to stabilize the signal frequency. Post-filtering is applied to smooth the signal processing, further optimizing signal quality. The processed digital signal is then converted back to analog signals using a digital-to-analog converter for further use or transmission. The processed data is stored locally or in the cloud. For display purposes, the data is transmitted to an archaeological server or workstation via wireless or wired networks.

[0094] Step S4: Use an antenna element array to output the target signal to the target device, which includes PC devices, mobile phones, tablets and walkie-talkies.

[0095] Archaeologists can use one or more of various smart devices, such as PCs, mobile phones, tablets, and walkie-talkies, to complete archaeological work at sites. They can receive enhanced signals during the work, which facilitates collaboration and communication and provides a stable foundation for subsequent excavation work.

[0096] Based on the above embodiments, this invention utilizes drones to conduct aerial photography over the archaeological site, then stores the acquired image data in a database. The image data is used to create a site mapping. Multiple devices, including multispectral cameras, thermal imagers, hyperspectral cameras, and RGB cameras, are employed to acquire the geological structure and characteristics of the site, facilitating antenna component setup. The antenna components use beamforming to capture omnidirectional or directional electromagnetic waves propagating in the air, adjusting signal phase and intensity to obtain enhanced electromagnetic waves. Under signal processing, the performance of beamforming is optimized, improving the computational power for capturing electromagnetic waves. With algorithm-weighted beamforming, rapid response calculations are performed to obtain high-quality target signals stored in the database. When appropriate, the target signals are transmitted via antenna components to various target devices such as PCs, mobile phones, tablets, and walkie-talkies, providing strong signals for subsequent archaeological work and improving efficiency.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for short-range transmission of communication protocol information, characterized in that, The method includes the following steps: Step S1: Construct an antenna element array at the site, wherein a drone is used to take aerial photos of the site map of the preset antenna elements. The drone carries one or more of a multispectral camera, a thermal imager, a hyperspectral camera, and an RGB camera to take aerial photos of the site of the preset antenna elements, and the drone transmits the aerial photos to a database to generate the survey map. Step S2: The antenna element uses beamforming to capture electromagnetic waves propagating in the air in either omnidirectional or directional directions. The beamforming is optimized using a recursive least squares method. The optimization steps for the beamforming using the recursive least squares method are as follows: Step S221: Initialize the beamforming weight vector and error covariance matrix; Step S222: At each time step, receive the input beamforming vector and the desired output; Step S223: Calculate the beamforming prediction error; Step S224: Update the beamforming error covariance matrix; Step S225: Update the beamforming weight vector described in step S221; Step S226: Repeat steps S222-S225 for training; Step S3: In response to the electromagnetic band, the signal processing unit processes the electromagnetic band to obtain the target signal, including: Step S301: Convert the electromagnetic band into a digital signal using an analog-to-digital converter; Step S302: Apply a digital bandpass filter to remove unwanted frequency bands from the digital signal and retain the standard frequency bands in the digital signal; Step S303: Use the deconvolution algorithm to restore the initial state of the digital signal in step S302; Step S304: Use a post-filter to smooth the digital signal from step 303; Step S305: Convert the digital signal from step S304 back to an analog signal using a digital-to-analog converter; Step S4: Use the antenna element array to output the target signal to the target device.

2. The method according to claim 1, characterized in that, In step S1: an antenna element array is constructed at the site of the archaeological site. The specific construction steps are as follows: Step S102: Select high-altitude landmarks around the site and low-altitude landmarks corresponding to the high altitudes based on the survey map; Step S103: Set multiple antenna elements in the high-altitude landmark and the low-altitude landmark array; Step S104: Form a linear array, planar array, or three-dimensional array based on the plurality of antenna element arrays.

3. The method according to claim 1, characterized in that, In step S2, the step of directionally capturing electromagnetic wavebands propagating in the air through beamforming of the antenna element array includes: Step S201: Determine the direction of the weak signal within the site; Step S202: The antenna element calculates the phase shift and superimposes the received signals in phase at the output end; Step S203: Before the signal of the antenna element is transmitted or received, the signal phase and intensity are adjusted by the phase controller and amplitude controller; Step S204: In response to step S203, the signals received by the antenna element are combined at the receiver input.

4. The method according to claim 1, characterized in that, In step S2, the step of omnidirectionally capturing electromagnetic wavebands propagating in the air through the antenna element array beamforming includes: Step S211: Output the signal phases between the antenna element arrays in a consistent and uniform manner; Step S212: Adjust the signal amplitude of each of the antenna element arrays; Step S213: In response to the adjustment of the signal phase and the signal amplitude, the signals of the antenna element array are combined.

5. The method according to claim 1, characterized in that, The target signal is obtained through steps S301-S305 and stored in the database.

6. The method according to claim 1, characterized in that, In step S4, the target device includes a PC, a mobile phone, a tablet, and a walkie-talkie.

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