Communication protocol information close-range transmission method

Abstract

The invention discloses a communication protocol information short-distance transmission method, which comprises the following steps of: constructing an antenna element array at a site to finish signal base station construction, capturing an electromagnetic wave band propagating in the air in an omnidirectional or directional manner through antenna element beam forming, preferably selecting an electromagnetic wave band suitable for enhancement, and responding to the electromagnetic wave band. The signal processing unit is used for processing the electromagnetic wave band to obtain the target signal, the signal processing unit is used for improving the quality of the electromagnetic wave band to obtain the target signal, and the target signal is output to the target equipment through the antenna element array, so that the problems that signal scattering and attenuation are easily intensified by increasing signal power in the prior art are solved; and the use of a specific frequency is limited by an on-site electromagnetic environment, so that a frequency band which is not interfered at all is difficult to find.

Description

Technical Field

[0001] The present invention relates to the field of communication transmission technology, and in particular to a method for short-distance transmission of communication protocol information. Background Art

[0002] Short-range wireless communication technologies are usually used to exchange data over short distances. They are widely used in personal devices, IoT applications, payment systems, smart homes, health monitoring, archaeology, marine research and other scenarios that require low-power, low-cost and high-efficiency communication. Taking archaeology as an example, short-range wireless transmission technology has become an important means of collecting, transmitting and analyzing field data, which can assist archaeologists in real-time monitoring of site environmental changes, recording discoveries, and communicating effectively between team members. However, the special environmental conditions at the archaeological site, such as metal relics, stone structures, soil moisture and vegetation coverage, pose serious interference to wireless signals, resulting in instability of data transmission and packet loss, which seriously affects the efficiency of archaeological work and data integrity.

[0003] In the prior art, although there are some anti-interference wireless communication schemes, such as using electromagnetic waves of specific frequencies, increasing signal power, and adopting multipath transmission strategies, these methods often have limited effects under the complex conditions of archaeological sites: increasing signal power can easily aggravate signal scattering and attenuation, and the use of specific frequencies is also limited by the on-site electromagnetic environment, and it is difficult to find a frequency band that is completely free from interference. Therefore, it is urgent to design a communication protocol information short-distance transmission method with strong anti-interference capabilities to solve the above problems. Summary of the invention

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

[0005] The technical solution of the present invention is achieved in this way:

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

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

[0008] Step S2: capturing electromagnetic wave bands propagating in the air omnidirectionally or directionally through beamforming of the antenna element;

[0009] Step S3: In response to the electromagnetic wave band, a signal processing unit processes the electromagnetic wave band to obtain a target signal;

[0010] Step S4: using 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 built at the site, and the specific construction steps are as follows:

[0012] Step S101: using a drone to take aerial photos of a site survey map of a preset antenna element;

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

[0014] Step S103: arranging a plurality of antenna elements at the high altitude landmark and the low altitude landmark array;

[0015] Step S104: forming a linear array, a planar array or a three-dimensional array according to 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 ruins of a preset antenna element, including the drone carrying one or more of a multispectral camera, a thermal imager, a hyperspectral camera and an RGB camera for taking aerial photos of the ruins of the preset antenna element, and the drone transmits the aerial images to a database to generate the surveying map.

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

[0018] Step S201: determining the direction of weak signals in the ruins;

[0019] Step S202: the antenna element superimposes the received signals in phase at the output end by calculating the phase shift;

[0020] Step S203: Before the antenna element signal is sent or received, the phase controller and the amplitude controller are used to adjust the signal phase and strength;

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

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

[0023] Step S211: uniformly outputting the signal phases between the antenna element arrays;

[0024] Step S212: adjusting the signal amplitude of each antenna element array;

[0025] Step S213: In response to the signal phase and the signal amplitude being adjusted, combining the signals of the antenna element array.

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

[0027] A further technical solution is that the beamforming is optimized by a recursive least squares method as follows:

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

[0029] Step S222: receiving the beamforming vector and the expected output as input at each time step;

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

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

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

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

[0034] A further technical solution is that in step S3, the signal processing unit performs analysis and processing of the electromagnetic wave band to obtain the target signal in the following specific steps:

[0035] Step S301: converting the electromagnetic wave band into a digital signal through an analog-to-digital converter;

[0036] Step S302: applying a digital bandpass filter to remove unnecessary frequency bands of the digital signal, and retaining standard frequency bands in the digital signal;

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

[0038] Step S304: using a post filter to smooth the digital signal in step 303;

[0039] Step S305: convert the digital signal in step S304 back into an analog signal through a digital-to-analog converter.

[0040] A further technical solution is to obtain the target signal through steps S301 to 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 device, a mobile phone, a tablet and a walkie-talkie.

[0042] The beneficial effects of the present invention are:

[0043] 1. The present invention completes the construction of a signal base station by building an antenna element array at the site, captures the electromagnetic wave band propagating in the air omnidirectionally or directionally through the antenna element beamforming, selects the electromagnetic wave band suitable for enhancement, and responds to the electromagnetic wave band. The signal processing unit is used to process the electromagnetic wave band to obtain the target signal. The signal processing unit is used to improve the quality of the electromagnetic wave band to obtain the target signal, and the target signal is output to the target device through the antenna element array, thereby solving the technical problems in the prior art that increasing the signal power is easy to aggravate the scattering and attenuation of the signal, and the use of a specific frequency is also limited by the on-site electromagnetic environment, and it is difficult to find a frequency band that is completely free from interference.

[0044] 2. Use drones to take aerial photos over the site, store the image data obtained from the aerial photos in a database, and use the image data to complete the site surveying and mapping. Use multispectral cameras, thermal imagers, hyperspectral cameras, and RGB cameras to obtain the geological structure and characteristics of the site, which facilitates the construction of antenna elements. Through the beamforming of antenna elements, the electromagnetic wave band propagating in the air is captured omnidirectionally or directionally, and the signal phase and intensity are adjusted to obtain enhanced electromagnetic wave bands. Under the processing of the signal processing unit, the performance of beamforming is optimized, and the computing power of capturing electromagnetic ratio bands is improved. Under the condition of algorithm-empowered beamforming, the calculation is responded quickly, and the high-quality target signal is stored in the database. At the appropriate time, the target signal is sent to multiple target devices such as PC devices, mobile phones, tablets, and walkie-talkies through antenna elements. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0046] Figure 2 A schematic diagram of the process of building an antenna element array according to the present invention;

[0047] Figure 3 It is a schematic flow chart of a method for capturing electromagnetic wave bands propagating in the air by beamforming of antenna elements of the present invention;

[0048] Figure 4 It is a schematic flow chart of a method for omnidirectionally capturing electromagnetic wave bands propagating in the air by beamforming of an antenna element of the present invention;

[0049] Figure 5 A schematic diagram of a flow chart of a beamforming optimization method using a recursive least squares method according to the present invention;

[0050] Figure 6The present invention is a flow chart of a method for a signal processing unit to process an electromagnetic wave band to obtain a target signal. DETAILED DESCRIPTION

[0051] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0052] The present invention provides a method for short-distance transmission of communication protocol information, a method for short-distance transmission of communication protocol information, characterized in that the method comprises the following steps: building an antenna element array at a ruins site; omnidirectionally or directionally capturing an electromagnetic wave band propagating in the air through beamforming of the antenna element; in response to the electromagnetic wave band, processing the electromagnetic wave band through a signal processing unit to obtain a target signal; and outputting the target signal to a target device using the antenna element array.

[0053] The present invention completes the construction of a signal base station by building an antenna element array at the site of the ruins, captures the electromagnetic wave band propagating in the air omnidirectionally or directionally through the antenna element beamforming, selects the electromagnetic wave band suitable for enhancement, and responds to the electromagnetic wave band by using a signal processing unit to process the electromagnetic wave band to obtain a target signal. The signal processing unit is used to improve the quality of the electromagnetic wave band to obtain the target signal, and the target signal is output to the target device through the antenna element array, thereby solving the technical problems in the prior art that increasing the signal power is likely to aggravate the scattering and attenuation of the signal, and the use of a specific frequency is also limited by the on-site electromagnetic environment, and it is difficult to find a frequency band that is completely free from interference.

[0054] An embodiment of the present invention shows a method for short-distance transmission of communication protocol information, the method comprising the following steps:

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

[0056] Specifically, a survey map of the ruins with preset antenna elements is taken by drone aerial photography; high-altitude landmarks around the ruins and low-altitude landmarks corresponding to the high altitudes are selected based on the survey map; multiple antenna elements are set in arrays of high-altitude landmarks and low-altitude landmarks; and a linear array, a planar array or a three-dimensional array is formed based on the array of multiple antenna elements.

[0057] In an antenna array, antenna elements are usually arranged in a specific layout, such as a linear array, a planar array, or a three-dimensional array. Through phase and amplitude control, beamforming can be achieved to enhance the signal in the desired direction or suppress the signal in the unwanted direction. The design and layout of antenna elements directly affect the performance of the antenna array, including gain, radiation pattern, bandwidth, and polarization characteristics. Among them, the antenna element is a parabolic antenna or a helical antenna, which is used to receive satellite communication signals. High-altitude landmarks are relatively high terrains where the ruins are located. Antenna elements are set here to facilitate signal reception, and corresponding antenna elements are set in relatively low terrains to improve the signal return signal performance.

[0058] In addition, a survey map of the ruins with preset antenna elements is taken by using drones, including the drone carrying one or more of a multispectral camera, a thermal imager, a hyperspectral camera and an RGB camera, which are used to take aerial photos of the ruins with preset antenna elements, and the aerial images are transmitted to the database by the drone to generate a survey map.

[0059] Multispectral cameras can capture different wavelengths of light, including visible light, near-infrared and red-edge bands. Multispectral cameras are used to detect the health of vegetation, because the reflectivity of plants in the near-infrared band is much higher than that of visible light, which can facilitate the selection of protection when the site is developed.

[0060] Thermal imaging cameras can detect heat emissions from objects and are used to identify differences in soil moisture and underground structures. Metals and stones have different thermal characteristics at different temperatures, and thermal imaging cameras can identify potential metal remains or stone structures beneath the surface, which is directly helpful for archaeological excavations. During the excavation process, the best excavation options can be made according to the location of metal remains or stone structures.

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

[0062] RGB cameras can provide high-resolution color images that are valuable for documenting the appearance of sites and in subsequent mapping.

[0063] In a preferred embodiment, participating Figure 1 and Figure 3 , step S2: capturing the electromagnetic wave band propagating in the air omnidirectionally or directionally through beamforming of antenna elements;

[0064] Specifically, the direction of weak signals in the ruins is determined; the antenna elements superimpose the received signals in phase at the output end by calculating the phase offset; before the antenna element signals are sent or received, the phase and strength of the signals are adjusted by the phase controller and the amplitude controller; in response to the antenna element signals adjusting the phase and strength of the signals by the phase controller and the amplitude controller before being sent or received, the signals received by the antenna elements are combined at the receiver input end.

[0065] For example, calculating the phase offset can ensure that the signals received by all antenna elements can be superimposed in phase at the receiving point, thereby enhancing the signal in a specific direction while weakening the signal in other directions. The phase offset of the antenna element relative to the antenna element is calculated using the following formula:

[0066]

[0067] Where n is the serial number of the antenna element, 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, λ=5cm, then the phase offset of the second antenna element is Φ2=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 pre-known information or by scanning different directions to find the direction of the strongest signal. In order to make the signals received by all antenna elements superimposed in phase at the output, the phase offset must be calculated for each antenna element.

[0069] The signal from each antenna element passes through a phase controller and an amplitude controller before being transmitted or received. The phase controller adjusts the phase of the signal, while the amplitude controller adjusts the strength of the signal.

[0070] In receive mode, the signals from all antenna elements are combined at the receiver input after being phase and amplitude adjusted so that the signal from the desired direction is boosted, while signals from other directions cancel each other out due to phase differences.

[0071] In a preferred embodiment, participating Figure 1 and Figure 4 , step S2: capturing the electromagnetic wave band propagating in the air omnidirectionally or directionally through beamforming of antenna elements;

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

[0073] In omnidirectional mode, there is no need to adjust the phase to form a beam pointing in a specific direction, but it is necessary to ensure phase consistency between all antenna elements to avoid any unnecessary signal loss or interference. It is also necessary to adjust the amplitude of each antenna element to ensure uniform output across the array to avoid multiple signal congestion in other directions, affecting output efficiency.

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

[0075] Preferably, see Figure 1 and Figure 5 , beamforming is optimized by recursive least squares, which is an online algorithm used to gradually estimate unknown parameters and adjust the weights of the antenna element array in beamforming. Recursive least squares can quickly respond to changes in the site environment and improve the performance of beamforming.

[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 to a diagonal matrix with a large value, indicating that the uncertainty of parameter estimation is very high in the initial state;

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

[0079] Step S223: calculating the beamforming prediction error includes:

[0080] 1. Use the current weight vector w(k-1) to predict the output:

[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] Among them, λ is the forgetting factor, which is used to control the influence of past data. The selection 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 a predetermined stop condition is reached, and the number of iterations or the prediction error is converged to a sufficiently small value to achieve optimal beamforming and improve its performance.

[0091] Step S3 Reference Figure 1 and Figure 6 : In response to the electromagnetic wave band, the electromagnetic wave band is processed by a signal processing unit to obtain a target signal;

[0092] Specifically, the electromagnetic wave band is converted into a digital signal through an analog-to-digital converter; a digital bandpass filter is applied to remove the frequency band that is not needed by the digital signal, and the standard frequency band in the digital signal is retained; a deconvolution algorithm is used to restore the initial state of the digital signal in step S302; a post-filter is used to smooth the digital signal in step 303; and the digital signal in step S304 is converted back into an analog signal through a digital-to-analog converter. Through steps S301 to S305, a target signal is obtained, and the target signal is stored in a database.

[0093] Use an analog-to-digital converter to convert the analog electromagnetic wave signal into a digital signal, ensuring that the sampling frequency is at least twice the highest frequency of the signal according to the Nyquist sampling theorem. Apply a digital bandpass filter to remove unwanted frequency bands and retain the useful frequency bands in the signal. Use an adaptive filtering algorithm to identify and suppress background noise and interference. In the presence of signal distortion, apply a deconvolution algorithm to restore the original characteristics of the signal. If the signal is affected by the Doppler effect, the deconvolution algorithm can compensate to stabilize the signal frequency. Apply a post-filter to smooth the signal processing and further optimize the signal quality. Convert the processed digital signal back to an analog signal through a digital-to-analog converter for further use or transmission. Store the processed data locally or in the cloud. When showing off. Send the data to an archaeological server or workstation via a wireless or wired network.

[0094] Step S4: using the antenna element array to output the target signal to the target device, the target device includes a PC device, a mobile phone, a tablet and a walkie-talkie.

[0095] Archaeologists can use one or more of a variety of smart devices such as PC devices, mobile phones, tablets and walkie-talkies to complete site archaeological work, receive enhanced signals during work, facilitate collaborative communication, and provide a stable foundation for subsequent excavation work.

[0096] Based on the above embodiments, the present invention uses a drone to complete aerial photography over the site, and then stores the image data obtained from the aerial photography in a database, and uses the image data to complete the site surveying and mapping, wherein a multi-spectral camera, a thermal imager, a hyperspectral camera and an RGB camera are used to obtain the geological structure and characteristics of the site, which is convenient for the antenna element to build. The electromagnetic wave band propagating in the air is captured omnidirectionally or directionally through the antenna element beam wave forming, and the signal phase and intensity are adjusted to obtain an enhanced electromagnetic wave band. Under the processing of the signal processing unit, the performance of the beam forming is optimized, the computing power of the electromagnetic wave band is improved, and in the case of algorithm-weighted beam forming, the rapid response calculation is performed to obtain a high-quality target signal stored in the database, and at an appropriate time, the target signal is generated to a PC terminal device, a mobile phone, a tablet and a walkie-talkie through the antenna element. A strong signal is provided for subsequent archaeological work, and work efficiency is improved.

[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 in the protection scope of the present invention.

Claims

1. A method for short-distance transmission of communication protocol information, characterized in that: The method comprises the following steps: Step S1: constructing an antenna element array at the site; Step S2: capturing electromagnetic wave bands propagating in the air omnidirectionally or directionally through beamforming of the antenna element; Step S3: In response to the electromagnetic wave band, a signal processing unit processes the electromagnetic wave band to obtain a target signal; Step S4: using 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: constructing an antenna element array at the site, the specific construction steps are as follows: Step S101: using a drone to take aerial photos of a site survey map of a preset antenna element; Step S102: selecting high-altitude landmarks around the site and low-altitude landmarks corresponding to the high altitudes according to the survey map; Step S103: arranging a plurality of antenna elements at the high altitude landmark and the low altitude landmark array; Step S104: forming a linear array, a planar array or a three-dimensional array according to the plurality of antenna element arrays.

3. The method according to claim 2, characterized in that In the step S101, a drone is used to take aerial photos of the site survey map of the preset antenna element, including the drone carrying one or more of a multispectral camera, a thermal imager, a hyperspectral camera and an RGB camera for taking aerial photos of the site of the preset antenna element, and the drone transmits the aerial images to a database to generate the survey map.

4. The method according to claim 1, characterized in that: In step S2, the step of capturing the electromagnetic wave band propagating in the air by beamforming the antenna element array includes: Step S201: determining the direction of weak signals in the ruins; Step S202: the antenna element superimposes the received signals in phase at the output end by calculating the phase shift; Step S203: Before the antenna element signal is sent or received, the phase controller and the amplitude controller are used to adjust the signal phase and strength; Step S204: In response to step S203, the signals received by the antenna elements are combined at the receiver input.

5. The method according to claim 1, characterized in that In step S2, the step of omnidirectionally capturing the electromagnetic wave band propagating in the air by beamforming of the antenna element array includes: Step S211: uniformly outputting the signal phases between the antenna element arrays; Step S212: adjusting the signal amplitude of each antenna element array; Step S213: In response to the signal phase and the signal amplitude being adjusted, combining the signals of the antenna element array.

6. The method according to claim 4 or 5, characterized in that: The beamforming is optimized by recursive least squares method.

7. The method according to claim 6, characterized in that The beamforming is optimized by recursive least squares method as follows: Step S221: Initialize the beamforming weight vector and error covariance matrix; Step S222: receiving the beamforming vector and the expected output as input at each time step; Step S223: calculating the beamforming prediction error; Step S224: updating the beamforming error covariance matrix; Step S225: updating the beamforming weight vector in step S221; Step S226: Repeat the training of steps S222-S225.

8. The method according to claim 1, characterized in that In step S3, the signal processing unit performs analysis and processing of the electromagnetic wave band to obtain the target signal. The specific steps are as follows: Step S301: converting the electromagnetic wave band into a digital signal through an analog-to-digital converter; Step S302: applying a digital bandpass filter to remove unnecessary frequency bands of the digital signal, and retaining standard frequency bands in the digital signal; Step S303: using a deconvolution algorithm to restore the initial state of the digital signal in step S302; Step S304: using a post filter to smooth the digital signal in step 303; Step S305: convert the digital signal in step S304 back into an analog signal through a digital-to-analog converter.

9. The method according to claim 8, characterized in that Through steps S301 to S305, the target signal is obtained and stored in a database.

10. The method according to claim 1, characterized in that In step S4, the target devices include PC devices, mobile phones, tablets and intercoms.

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