Wireless sensing device, and multi-frequency multi-module sensing method and related device therefor

Abstract

A wireless sensing device, and a multi-frequency multi-module sensing method and a related device therefor. By means of the method provided in the embodiments and on the basis of the wireless sensing device provided therein, wireless signals of different frequency bands can be processed, and wireless signals of multiple frequency bands and multiple standards can be effectively measured at the same time, such that whether a wireless signal to be analyzed is subject to interference can be determined. The wireless sensing device provided in the embodiments achieves relatively high efficiency and relatively low cost in sensing the coverage quality of a wireless signal, can be conducive to datafication and visualization of the quality of the wireless signal, safeguards and provides assistance for the intelligence and safety improvement of industries, and can provide strong support for wireless signal operation in the rail industry.

Description

Wireless sensing devices, multi-frequency multi-module sensing methods and related equipment

[0001] This application claims priority to Chinese Patent Application No. 202410773783.0, filed on June 17, 2024, entitled "Wireless Sensing Device, Multi-Frequency Multi-Module Sensing Method and Related Devices", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of signal processing technology, and in particular to a wireless sensing device, a multi-frequency multi-module sensing method, and related equipment. Background Technology

[0003] During the construction of wireless signal systems, signal coverage has been gradually achieved in some key areas, and the level of wireless signal coverage has been improved. In some industries, due to aging equipment, interference from signals on the same frequency, or sudden equipment failures, wireless signal optimization may be necessary. Especially in critical scenarios within certain industries, communication signals serve as the lifeline of business operations and require particular attention. Therefore, it may be necessary to monitor wireless signal quality in real time and conduct big data analysis to quantify and visualize wireless signal quality data, thereby contributing to the industry's intelligent and security enhancements and providing support.

[0004] In the process of real-time sensing of wireless signal coverage quality, the sensing efficiency is low for multi-standard and multi-frequency wireless signal measurement, often requiring multiple devices for measurement. Due to cost considerations, wireless signal sensing needs to be streamlined. How to improve measurement efficiency and achieve efficient measurement of multi-standard and multi-frequency wireless signals using limited equipment has been a long-standing concern.

[0005] Summary of the Invention

[0006] This application aims to at least solve one of the aforementioned technical defects. In view of this, this application provides a wireless sensing device, a multi-frequency multi-module sensing method and related devices to solve the technical defect in the prior art that makes it difficult to achieve efficient measurement of multi-standard and multi-frequency wireless signals.

[0007] A wireless sensing device, the wireless sensing device including at least one radio frequency link, each radio frequency link of the wireless sensing device corresponding to a different frequency band;

[0008] When each radio frequency link of the wireless sensing device is an independent radio frequency link, each independent radio frequency link of the wireless sensing device includes a radio frequency front-end connector, a front-end filter, a digitally controlled oscillator, a mixer, a back-end filter, an analog-to-digital converter, a baseband processing unit, and a media access control processing unit.

[0009] The radio frequency front-end connector of each radio frequency link of the wireless sensing device is connected to the mixer through the front-end filter.

[0010] The numerically controlled oscillator of each radio frequency link of the wireless sensing device is connected to the mixer.

[0011] The mixer of each radio frequency link of the wireless sensing device is connected to the analog-to-digital converter through the back-end filter.

[0012] The analog-to-digital converter is connected to the media access control processing unit via the baseband processing unit;

[0013] The radio frequency front-end connector of each radio frequency link of the wireless sensing device is used to connect to the antenna corresponding to each frequency band, so that each radio frequency link of the wireless sensing device can connect to wireless signals of different frequency bands.

[0014] Both the front-end filter and the back-end filter are used to filter the signals of the radio frequency link;

[0015] The numerically controlled oscillator is used to output the clock signal corresponding to each radio frequency link of the wireless sensing device.

[0016] The mixer is used to perform frequency conversion processing on the signals of each radio frequency link of the wireless sensing device.

[0017] The analog-to-digital converter is used to perform analog-to-digital conversion sampling processing on the signal after frequency conversion processing by the mixer, and output the digital signal corresponding to each radio frequency link of the wireless sensing device.

[0018] The baseband processing unit is used to decode and demodulate the digital signal corresponding to the signal of each radio frequency link of the wireless sensing device, and after determining the demodulation information of the digital signal corresponding to the signal of each radio frequency link of the wireless sensing device, transmits it to the media access control processing unit.

[0019] The media access control processing unit is used to parse the demodulation information of the digital signal corresponding to each radio frequency link of the wireless sensing device, so as to determine the information of the wireless signal corresponding to each radio frequency link of the wireless sensing device.

[0020] Preferably, when each radio frequency link of the wireless sensing device is a non-independent radio frequency link, the wireless sensing device further includes a switching unit and a scheduling unit.

[0021] in,

[0022] Each radio frequency link of the wireless sensing device includes only a radio frequency front-end connector, a front-end filter, a baseband processing unit, and a media access control processing unit, and no longer has a mixer, a digitally controlled oscillator, a back-end filter, and an analog-to-digital converter.

[0023] The radio frequency front-end connector of each radio frequency link of the wireless sensing device is connected to the front-end filter, and the baseband processing unit of each radio frequency link is connected to the media access control processing unit.

[0024] Based on this, each radio frequency link of the wireless sensing device shares a common mixer, a common numerically controlled oscillator, a common intermediate frequency filter, and a common analog-to-digital converter.

[0025] The common mixer is connected to the common analog-to-digital converter through the common intermediate frequency filter;

[0026] The common numerically controlled oscillator is connected to the common mixer;

[0027] The baseband processing unit of each RF link is connected to the common analog-to-digital converter.

[0028] The switching unit is used to control the connection between the front-end filter of each radio frequency link of the wireless sensing device and the common mixer.

[0029] The common numerically controlled oscillator is connected to one end of the scheduling unit;

[0030] The other end of the scheduling unit is connected to the baseband processing unit and the media access control processing unit of each radio frequency link, respectively.

[0031] The common intermediate frequency inverter is used to filter the signals of each radio frequency link;

[0032] The common numerically controlled oscillator is used to output the clock signal corresponding to the signal of each RF link;

[0033] The common mixer is used to perform frequency conversion processing on the signals of each RF link;

[0034] The common analog-to-digital converter is used to perform analog-to-digital conversion sampling processing on the signal after frequency conversion processing by the common mixer, and outputs the digital signal corresponding to the signal of each radio frequency link of the wireless sensing device, and transmits it to the baseband processing unit of the radio frequency link of the wireless sensing device.

[0035] Preferably,

[0036] When the RF front-end connector of each RF link of the wireless sensing device is switched according to the user's needs, the baseband processing unit and the media and access control processing unit of the wireless sensing device are simultaneously switched to the mode corresponding to the input mode of the RF front-end connector of the currently connected RF link of the wireless sensing device.

[0037] A multi-frequency, multi-module sensing method, applied to the aforementioned wireless sensing device, the method comprising:

[0038] Connect the antennas corresponding to each frequency band according to the frequency band of the RF front-end connector of each RF link of the wireless sensing device.

[0039] The first target wireless signal to be analyzed is received by the radio frequency front-end connectors of each radio frequency link of the wireless sensing device.

[0040] The received first target wireless signal is analyzed using the numerically controlled oscillator of each radio frequency link of the wireless sensing device to determine the clock signal of each radio frequency link of the wireless sensing device.

[0041] Based on the clock signal of each radio frequency link of the wireless sensing device, the received first target wireless signal is frequency-converted and filtered by the front-end filter, back-end filter and mixer of each radio frequency link of the wireless sensing device to obtain the intermediate frequency signal of each radio frequency link of the wireless sensing device.

[0042] The intermediate frequency signal of each radio frequency link of the wireless sensing device is sampled and processed by the analog-to-digital converter of each radio frequency link of the wireless sensing device to obtain the digital signal corresponding to each radio frequency link of the wireless sensing device.

[0043] The baseband processing unit of each radio frequency link of the wireless sensing device decodes and demodulates the digital signal of each radio frequency link of the wireless sensing device to obtain the demodulation information of the wireless signal of each radio frequency link of the wireless sensing device.

[0044] The media access control processing unit of each radio frequency link of the wireless sensing device analyzes the demodulation information of the wireless signal of each radio frequency link of the wireless sensing device to determine the information of the wireless signal corresponding to each radio frequency link of the wireless sensing device.

[0045] Based on the information of the wireless signals corresponding to each radio frequency link of the wireless sensing device, assess whether there is interference in the wireless signals corresponding to each radio frequency link of the wireless sensing device.

[0046] Preferably, the step of performing frequency conversion and filtering processing on the received first target wireless signal based on the clock signal of each RF link of the wireless sensing device, through the front-end filter, back-end filter, and mixer of each RF link of the wireless sensing device, to obtain the intermediate frequency signal of each RF link of the wireless sensing device, includes:

[0047] Based on the clock signal of each radio frequency link of the wireless sensing device, the first target wireless signal received by each radio frequency link of the wireless sensing device is filtered by the front-end filter of each radio frequency link of the wireless sensing device to obtain the first signal corresponding to each radio frequency link of the wireless sensing device.

[0048] The first signal is frequency-converted by the mixer of each radio frequency link of the wireless sensing device to obtain the second signal of each radio frequency link of the wireless sensing device.

[0049] The second signal is filtered by the back-end filter of each radio frequency link of the wireless sensing device to obtain the intermediate frequency signal of each radio frequency link of the wireless sensing device.

[0050] Preferably, the step of sampling and processing the intermediate frequency signal of each radio frequency link of the wireless sensing device through the analog-to-digital converter of each radio frequency link to obtain the digital signal corresponding to each radio frequency link of the wireless sensing device includes:

[0051] The analog-to-digital converter of each radio frequency link of the wireless sensing device is used to perform analog-to-digital conversion sampling processing on the intermediate frequency signal of each radio frequency link of the wireless sensing device, so as to obtain the analog-to-digital conversion sampling processing result of the intermediate frequency signal of each radio frequency link of the wireless sensing device.

[0052] Based on the analog-to-digital conversion sampling results of the intermediate frequency signals of each radio frequency link of the wireless sensing device, the intermediate frequency signals of each radio frequency link of the wireless sensing device are processed by analog-to-digital converters of each radio frequency link to obtain the digital signals corresponding to each radio frequency link of the wireless sensing device.

[0053] Preferably, when applied to any of the wireless sensing devices described above, the method includes:

[0054] Determine the frequency and signal standard corresponding to each radio frequency front-end connector of the wireless sensing device;

[0055] Determine the frequency and signal standard switching priority corresponding to each radio frequency front-end connector of the wireless sensing device;

[0056] Determine the stable operating time period for the switching unit of the wireless sensing device to switch from the initial switching to the frequency corresponding to the radio frequency front-end connector;

[0057] The initial test frequency of the signal is determined. Based on the user's requirements and the switching priority of the frequency and signal standard corresponding to each RF front-end connector of the wireless sensing device, at a preset initial moment, under the control of the scheduling unit of the wireless sensing device, the switching unit of the wireless sensing device is switched to the RF connector connection corresponding to the user's requirements to receive the second target wireless signal to be analyzed. At the same time, the common numerically controlled oscillator of the wireless sensing device is configured for synchronization frequency.

[0058] According to the control of the scheduling unit, the frequency of the radio frequency link of the wireless sensing device is configured in time slots according to the preset time slot allocation conditions through the common numerical control oscillator of the wireless sensing device, so as to configure the frequency of the radio frequency link of the wireless sensing device to the mixing frequency corresponding to the second target wireless signal, and analyze the second target wireless signal according to the mixing frequency corresponding to the second target wireless signal, and output a clock signal corresponding to the second target wireless signal.

[0059] Based on the clock signal and mixing frequency corresponding to the second target wireless signal, the second target wireless signal is frequency-converted and filtered through the front-end filter, common mixer and common intermediate frequency filter of the radio frequency link of the wireless sensing device to obtain the intermediate frequency signal of the radio frequency link of the wireless sensing device.

[0060] The intermediate frequency signal of the radio frequency link of the wireless sensing device is sampled and processed by the common analog-to-digital converter of the radio frequency link of the wireless sensing device to obtain the digital signal corresponding to the radio frequency link of the wireless sensing device.

[0061] Under the control of the scheduling unit, the baseband processing unit and media access control processing unit of the radio frequency link of the wireless sensing device are configured. After a preset delay, the baseband processing unit of the radio frequency link of the wireless sensing device decodes and demodulates the digital signal corresponding to the radio frequency link of the wireless sensing device to obtain the demodulation information of the wireless signal of the radio frequency link of the wireless sensing device.

[0062] The media access control processing unit of the radio frequency link of the wireless sensing device analyzes the demodulation information of the wireless signal of the radio frequency link of the wireless sensing device to determine the information of the wireless signal corresponding to the radio frequency link of the wireless sensing device.

[0063] Based on the preset first moment within the stable operating time period of the switching unit of the wireless sensing device from the start of switching to the frequency corresponding to the RF front-end connector, the baseband processing unit and media access control processing unit of the RF link of the wireless sensing device continuously collect and parse the information of the wireless signal received by the RF link currently connected to the switching unit of the wireless sensing device.

[0064] Based on the preset second moment within the stable working time period of the switching unit of the wireless sensing device from the start of switching to the frequency corresponding to the RF front-end connector, the process continues to execute under the control of the scheduling unit of the wireless sensing device, switching the switching unit of the wireless sensing device to the RF connector connection corresponding to the user's needs, so as to receive the second target wireless signal to be analyzed, and simultaneously performing the operation of synchronizing the frequency of the common numerically controlled oscillator of the wireless sensing device, until the analysis of the information of the wireless signal received by each RF link of the wireless sensing device is completed;

[0065] Based on the information of the wireless signal corresponding to the radio frequency link of the wireless sensing device, assess whether there is interference in the wireless signal corresponding to the radio frequency link of the wireless sensing device.

[0066] Preferably, the step of performing frequency conversion and filtering processing on the second target wireless signal based on the clock signal corresponding to the second target wireless signal and the mixing frequency, through the front-end filter, common mixer, and common intermediate frequency filter of the radio frequency link of the wireless sensing device, to obtain the intermediate frequency signal of the radio frequency link of the wireless sensing device, includes:

[0067] Based on the clock signal of the radio frequency link of the wireless sensing device, the second target wireless signal is filtered by the front-end filter to obtain the third signal corresponding to the radio frequency link of the wireless sensing device.

[0068] The third signal corresponding to the radio frequency link of the wireless sensing device is frequency-converted by the common mixer to obtain the fourth signal corresponding to the radio frequency link of the wireless sensing device.

[0069] The fourth signal is filtered by the common intermediate frequency filter to obtain the intermediate frequency signal of the radio frequency link of the wireless sensing device.

[0070] A multi-frequency, multi-module sensing device includes: one or more processors, and a memory;

[0071] The memory stores computer-readable instructions, which, when executed by the one or more processors, implement the steps of the multi-frequency multi-module sensing method as described above.

[0072] A readable storage medium storing computer-readable instructions, which, when executed by one or more processors, cause the one or more processors to perform the steps of any of the multi-frequency multi-module sensing methods described above.

[0073] As can be seen from the technical solutions described above, when it is necessary to measure multi-band, multi-standard wireless signals, the embodiments of this application can provide two different wireless sensing devices, so that monitoring of wireless signals of different frequency bands and standards can be achieved through the provided wireless sensing devices. Specifically, the wireless sensing device provided in the embodiments of this application can include at least one radio frequency (RF) link, and each RF link of the wireless sensing device can correspond to a different frequency band; when each RF link of the wireless sensing device is an independent RF link, each independent RF link of the wireless sensing device can include an RF front-end connector, a front-end filter, a digitally controlled oscillator, a mixer, a back-end filter, etc. The device comprises an analog-to-digital converter, a baseband processing unit, and a media access control (MAC) processing unit. The RF front-end connector of each RF link of the wireless sensing device can be connected to a mixer via a front-end filter. The numerically controlled oscillator (CNC) of each RF link of the wireless sensing device can be connected to a mixer. The mixer of each RF link of the wireless sensing device can be connected to the analog-to-digital converter via a back-end filter. The analog-to-digital converter can be connected to the MAC processing unit via the baseband processing unit. The RF front-end connector of each RF link of the wireless sensing device can be used to connect antennas corresponding to each frequency band, enabling each RF link of the wireless sensing device to receive the wireless signal to be analyzed. Both the front-end and back-end filters can be used to filter the signals of the RF links. The CNC oscillator can be used to output the signal of the wireless sensing device. The clock signal corresponds to the signal of each RF link; the mixer can be used to perform frequency conversion processing on the signal of each RF link of the wireless sensing device; the analog-to-digital converter can be used to perform analog-to-digital conversion sampling processing on the signal after frequency conversion processing by the mixer, and output the digital signal corresponding to the signal of each RF link of the wireless sensing device; the baseband processing unit can be used to decode and demodulate the digital signal corresponding to the signal of each RF link of the wireless sensing device, and can transmit the demodulated information of the digital signal corresponding to the signal of each RF link of the wireless sensing device to the media access control processing unit after determining the demodulated information of the digital signal corresponding to the signal of each RF link of the wireless sensing device; the media access control processing unit can be used to parse the demodulated information of the digital signal corresponding to the signal of each RF link of the wireless sensing device to determine the information of the wireless signal corresponding to each RF link of the wireless sensing device.

[0074] When the radio frequency (RF) links of a wireless sensing device are non-independent RF links, the wireless sensing device may further include a switching unit and a scheduling unit. Each RF link of the wireless sensing device may include an RF front-end connector, a front-end filter, a baseband processing unit, and a media access control (MAC) processing unit. The RF front-end connector of each RF link can be connected to the front-end filter, and the baseband processing unit of each RF link can be connected to the MAC processing unit. Based on this, all RF links of the wireless sensing device share a common mixer, a common numerically controlled oscillator (CNC), a common intermediate frequency (IF) filter, and a common analog-to-digital converter (ADC). The common mixer can be connected to the common ADC through the common IF filter; the common CNC oscillator can be connected to the common mixer; and the baseband processing unit of each RF link can be connected to the common ADC. The system includes a converter connection; a switching unit that controls the connection between the front-end filter of each RF link of the wireless sensing device and the common mixer; a common numerically controlled oscillator that connects to one end of the scheduling unit; and the other end of the scheduling unit that connects to the baseband processing unit and the media access control processing unit of each RF link. A common intermediate frequency converter is used to filter the signal of each RF link. The common numerically controlled oscillator outputs the clock signal corresponding to the signal of each RF link. The common mixer performs frequency conversion processing on the signal of each RF link. A common analog-to-digital converter performs analog-to-digital conversion sampling processing on the signal converted by the common mixer, outputs the digital signal corresponding to the signal of each RF link of the wireless sensing device, and transmits it to the baseband processing unit of each RF link for processing, thereby realizing the analysis of the wireless signal to be analyzed.

[0075] As described above, the wireless sensing device provided in this application embodiment can effectively measure wireless signals of multiple frequency bands and standards simultaneously, thereby determining whether interference exists in the wireless signal to be analyzed. The wireless sensing device provided in this application embodiment has high efficiency in sensing the coverage quality of wireless signals and low cost. It can help to digitize and visualize wireless signal quality data, providing assistance for the intelligentization and safety improvement of the industry, and offering strong support for the wireless signal operation in the rail industry. Attached Figure Description

[0076] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0077] Figure 1 is a schematic diagram of the structure of a wireless sensing device provided in an embodiment of this application;

[0078] Figure 2 is a schematic diagram of another wireless sensing device provided in an embodiment of this application;

[0079] Figure 3 is a flowchart of a method for implementing multi-frequency multi-module sensing according to an embodiment of this application;

[0080] Figure 4 is a flowchart of another method for implementing multi-frequency multi-module sensing provided in an embodiment of this application;

[0081] Figure 5 is a hardware structure block diagram of a multi-frequency, multi-module sensing device disclosed in an embodiment of this application. Detailed Implementation

[0082] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0083] Given that most current multi-frequency, multi-module sensing solutions struggle to adapt to complex and ever-changing business needs, this application studies a multi-frequency, multi-module sensing solution. The wireless sensing device provided in this application's embodiments can effectively measure wireless signals across multiple frequency bands and standards simultaneously, enabling the determination of whether interference exists in the wireless signal being analyzed. The wireless sensing device provided in this application's embodiments offers high efficiency and low cost in sensing wireless signal coverage quality, facilitating the digitization and visualization of wireless signal quality data. This contributes to the industry's intelligent and security enhancements, providing strong support for wireless signal operation in the rail transit sector.

[0084] The methods provided in this application can be used in a variety of general-purpose or special-purpose computing device environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor devices, distributed computing environments including any of the above devices, etc.

[0085] This application provides a multi-frequency, multi-module sensing method, which can be applied to various wireless signal quality monitoring systems, as well as to various computer terminals or smart terminals. The executing entity can be the processor or server of the computer terminal or smart terminal.

[0086] The following, with reference to Figure 1, presents a schematic diagram of an optional wireless sensing device that can realize multi-band and multi-module wireless signal sensing according to an embodiment of this application. As shown in Figure 1, the wireless sensing device may include at least one radio frequency link, and each radio frequency link of the wireless sensing device may correspond to a different frequency band; so as to realize the simultaneous monitoring of multi-band and multi-standard wireless signals.

[0087] When each radio frequency link of a wireless sensing device is an independent radio frequency link, each independent radio frequency link of the wireless sensing device may include a radio frequency front-end connector, a front-end filter, a digitally controlled oscillator, a mixer, a back-end filter, an analog-to-digital converter, a baseband processing unit, and a media access control processing unit.

[0088] Among them, the RF front-end connector of each RF link of the wireless sensing device can be connected to the mixer through a front-end filter;

[0089] The numerically controlled oscillator of each RF link in a wireless sensing device can be connected to a mixer;

[0090] The mixer for each RF link of the wireless sensing device can be connected to an analog-to-digital converter via a back-end filter;

[0091] The analog-to-digital converter can be connected to the media access control processing unit via the baseband processing unit.

[0092] The radio frequency front-end connector of each radio frequency link of the wireless sensing device can be connected to the antenna corresponding to each frequency band, so that each radio frequency link of the wireless sensing device can receive wireless signals of different frequency bands.

[0093] For example, as shown in Figure 1, the wireless sensing device includes three radio frequency front-end connectors: RF1, RF2, and RF3. RF1, RF2, and RF3 are input connectors for different frequency bands, and antennas for different frequency bands can be connected to the wireless sensing device through RF1, RF2, and RF3.

[0094] For example, the RF1 connector can be used to connect to a 2.4 GHz antenna; the RF2 connector can be used to connect to a 5.8 GHz antenna; and the RF3 connector can be used to connect to a 1.8 GHz antenna.

[0095] The connectors for RF1, RF2, and RF3 can be either SMA or N-type connectors; the connector type is not limited.

[0096] The front-end and back-end filters of each radio frequency link in the wireless sensing device can filter the signals received by each radio frequency link so as to filter out signals of unwanted frequency bands.

[0097] For example, the filter 11 of each radio frequency link in the wireless sensing device shown in Figure 1 can filter high-frequency signals, and the range of the filtered signal frequency band is selectable.

[0098] For example, in practical applications, the wireless sensing device provided in this application embodiment can filter signals with a passband bandwidth of 75MHz.

[0099] As shown in Figure 1, the filter 12 of the radio frequency link of the wireless sensing device can filter the intermediate frequency signal, wherein the bandwidth of the intermediate frequency signal can be consistent with the bandwidth of the radio frequency link stage.

[0100] Correspondingly, as shown in Figure 1, the functions of filters 21, 31 and filters 22, 32 in the radio frequency link of the wireless sensing device correspond to the operating range of different frequency bands.

[0101] In practical applications, the radio frequency link of wireless sensing devices usually needs to output a corresponding clock signal for the following reasons:

[0102] (1) Synchronization is required: In radio frequency systems, multiple components need to work together, such as transceivers, demodulators, encoders, etc. A clock signal provides a synchronization reference to ensure that these components are in sync in time, thereby enabling correct data transmission and processing.

[0103] (2) Sampling and digitization are required: Many radio frequency signals require sampling and digitization for further analysis and processing in the digital domain. The clock signal determines the sampling time point, ensuring the accuracy and consistency of the sampling.

[0104] (3) Frequency synthesis is required: Frequency synthesizers in RF links typically require a reference clock to generate the desired RF signal. The stability and accuracy of the clock signal are crucial to the precision of frequency synthesis.

[0105] (4) Data transmission and interface required: When the radio frequency system interacts with other devices or systems, the clock signal can be used to synchronize data transmission and ensure the correct reception and parsing of data.

[0106] (5) Debugging and testing are required: Clock signals are also very important for the debugging and testing of RF links. They can help engineers observe and analyze the timing relationships of signals, diagnose problems, and perform performance evaluations.

[0107] In summary, the clock signal plays a crucial role in the RF link, providing a time reference and synchronization mechanism to ensure the normal operation and performance of the RF system. Different RF applications may have different requirements for the clock signal, such as frequency, phase noise, and jitter. Therefore, it is necessary to select an appropriate clock source and clock distribution scheme based on specific needs.

[0108] Therefore, the numerically controlled oscillator of each radio frequency link of the wireless sensing device can output the clock signal corresponding to the signal of each radio frequency link of the wireless sensing device;

[0109] In practical applications, each radio frequency link of a wireless sensing device needs to perform frequency conversion processing on the signal for the following reasons:

[0110] (1) Frequency conversion requirement: The radio frequency link needs to convert the radio frequency signal into an intermediate frequency signal for subsequent signal processing and demodulation. For example, by mixing, the high-frequency radio frequency signal can be reduced to an intermediate frequency, which is more suitable for digital signal processing and transmission.

[0111] (2) It can satisfy selective filtering: the signal bandwidth of the RF link is relatively narrow. By performing frequency conversion processing on the signal, a relatively narrow intermediate frequency signal can be obtained to match the bandwidth of the RF link. For example, selective filtering can be performed by intermediate frequency filter to remove out-of-band interference and noise, thereby improving the signal quality and signal-to-noise ratio.

[0112] (3) Better gain control: Frequency conversion of the RF link signal makes gain control of the RF link easier to achieve. For example, gain control is easier to achieve in the intermediate frequency (IF) stage to accommodate different signal strengths and dynamic ranges. This helps improve the receiver's sensitivity and anti-interference capability.

[0113] (4) Demodulation and Decoding Needs: Intermediate frequency (IF) signals are more suitable for demodulation and decoding operations. Therefore, IF conversion processing is required for the signals in the RF link, for example, to restore the modulated signal to the original baseband signal. IF processing can provide better demodulation performance and lower bit error rate.

[0114] (5) Easier to integrate with other circuits: Intermediate frequency processing is usually integrated with other radio frequency circuits, such as amplifiers and filters, which facilitates system design and implementation. Therefore, it is necessary to convert the radio frequency link signal to obtain the intermediate frequency signal.

[0115] (6) Compatibility and standardization requirements: Many wireless communication standards specify intermediate frequency and bandwidth. Mixing to intermediate frequency can meet the requirements of these standards and ensure device compatibility and interoperability.

[0116] In summary, intermediate frequency (IF) conversion is a crucial component of the radio frequency (RF) link. It helps improve signal quality, enhance selectivity, achieve gain control, and meet the requirements of communication systems. This allows for better processing and transmission of wireless signals, resulting in reliable communication.

[0117] Therefore, the mixer of each radio frequency link of the wireless sensing device can perform frequency conversion processing on the signal of each radio frequency link of the wireless sensing device.

[0118] In practical applications, the radio frequency link needs to perform analog-to-digital conversion (ADC) on the signal for the following reasons:

[0119] (1) The need for digital signal processing: Modern communication systems widely use digital signal processing technology to realize various functions, such as modulation and demodulation, filtering, encoding and decoding. After the radio frequency signal is converted into digital form, it can be processed efficiently and flexibly using a digital signal processor (DSP) or other digital circuits.

[0120] (2) Signal transmission and storage requirements: Digital signals have advantages in transmission and storage. By converting radio frequency signals into digital signals through an ADC, they can be transmitted using digital communication links (such as optical fibers, cables, etc.) and can be easily stored in digital storage media, such as hard drives, flash memory, etc.

[0121] (3) Anti-interference capability requirements: Digital signal processing can employ various algorithms to enhance the anti-interference capability of signals. For example, digital filtering techniques can be used to remove noise and interference, thereby improving signal quality and reliability.

[0122] (4) Flexibility and reconfigurability: Digital circuits can be programmed or configured to implement different functions and protocols. After the radio frequency signal is converted into digital form by the ADC, the digital processing module can be flexibly configured as needed to adapt to different communication standards and application scenarios.

[0123] (5) System integration and miniaturization: Digital circuits have advantages in terms of integration and miniaturization. Integrating radio frequency links with digital circuits can enable more compact and efficient communication systems, meeting the miniaturization and high performance requirements of modern electronic devices.

[0124] In summary, analog-to-digital conversion of signals in radio frequency links is one of the key steps in realizing modern communication systems. It enables signals to be processed, transmitted, and stored in the digital domain, providing greater flexibility, interference resistance, and system performance.

[0125] Therefore, in order to improve the anti-interference capability of each radio frequency link of the wireless sensing device, the analog-to-digital converter of each radio frequency link of the wireless sensing device can perform analog-to-digital conversion sampling processing on the signal after frequency conversion by the mixer, and output the digital signal corresponding to the signal of each radio frequency link of the wireless sensing device.

[0126] For example, the analog converter of each RF link in a wireless sensing device can perform AD sampling on the intermediate frequency signal obtained after frequency conversion by the mixer to achieve ADC conversion of the intermediate frequency signal.

[0127] AD sampling refers to analog-to-digital sampling. AD sampling is the process of converting analog signals into digital signals.

[0128] In communication technology and other fields, many signals are analog signals, such as sound, temperature, and pressure. However, digital systems, such as computers and digital signal processors, can only process digital signals. Therefore, analog signals need to be converted into digital signals through analog-to-digital (AD) sampling so that digital systems can process, store, transmit, and analyze them.

[0129] The AD sampling process typically includes the following steps:

[0130] (1) Sampling: The analog signal is sampled at certain time intervals to obtain a series of discrete samples.

[0131] (2) Quantization: Convert each sampled value into a finite number of discrete levels, usually using binary representation.

[0132] (3) Encoding: Encode the quantized sample values ​​into digital codes so that the digital system can process them.

[0133] Key parameters for analog-to-digital (ADC) sampling include sampling rate and quantization precision. Sampling rate determines the sampling frequency; a higher sampling rate retains more detail in the analog signal but requires more storage space and processing power. Quantization precision determines the number of discrete levels each sample value can represent; higher quantization precision results in a better approximation of the analog signal but requires more bits to represent each sample.

[0134] In practical applications, analog-to-digital (AD) sampling of signals is widely used in various fields, such as audio processing, image processing, communication systems, and instrumentation. Through AD sampling, analog signals can be converted into digital form, enabling various functions of digital signal processing, such as filtering, modulation, demodulation, and compression.

[0135] For example, the wireless sensing device provided in this application performs AD sampling on the intermediate frequency signal, and the frequency of the ADC conversion of the intermediate frequency can be referenced to 122.88MHz.

[0136] In practical applications, the RF link needs to decode and demodulate digital signals for the following reasons:

[0137] (1) The original information needs to be restored: Digital signals may be encoded and modulated during transmission to improve transmission efficiency, anti-interference ability, or adapt to specific transmission media. The decoding and demodulation process is to restore these encoded and modulated signals to the original information, such as restoring encoded and modulated information to audio, video, data, etc.

[0138] (2) Signal processing and extraction are required: Decoding and demodulation can remove redundant information from the signal and extract useful data. For example, in wireless communication, demodulation can restore the signal modulated on the radio frequency carrier to the baseband signal for further processing and analysis.

[0139] (3) Facilitates interaction with other devices or systems: Many radio frequency links need to interact with other devices or systems, such as transmitting received digital signals to computers, audio equipment, or other digital processing units. Decoding and demodulation are necessary steps to convert digital signals into a format that these devices can understand and process.

[0140] (4) Adaptability to different communication standards and protocols: Different communication systems and standards may use different encoding and modulation methods. Decoding and demodulation can enable the RF link to adapt to various communication standards, ensuring compatibility and interoperability with other devices.

[0141] (5) Improve signal quality and reliability: Decoding and demodulation can perform error correction, equalization, and other signal processing operations on the signal to improve its quality and reliability. This is especially important for transmitting digital signals in complex wireless environments.

[0142] In summary, decoding and demodulation are indispensable parts of signal processing in the radio frequency link. Decoding and demodulation can convert the received digital signals into usable information, realize the basic functions of digital communication, and provide a foundation for further signal processing and applications.

[0143] Therefore, in order to better process signals, the baseband processing unit of each radio frequency link of the wireless sensing device can decode and demodulate the digital signal corresponding to the signal of each radio frequency link of the wireless sensing device, and after determining the demodulation information of the digital signal corresponding to the signal of each radio frequency link of the wireless sensing device, transmit it to the media access control processing unit.

[0144] In practical applications, the Media Access Control (MAC) processing unit of a wireless sensing device needs to analyze the decoded and demodulated signals in the radio frequency link for the following reasons:

[0145] (1) Frame synchronization and identification requirements: The MAC processing unit needs to parse the frame structure in the signal to determine the start and end positions of the frame, thereby achieving frame synchronization. By identifying specific fields or identifiers of the frame, the MAC processing unit can determine the signal type, destination address, source address, and other information for subsequent processing and routing.

[0146] (2) The need for address filtering and identification: In network communication, the MAC processing unit needs to filter and identify signals based on the destination address. By parsing the MAC address in the signal, the MAC processing unit can determine whether the signal should be received or discarded, and send the signal to the correct destination.

[0147] (3) The need for protocol parsing and processing: Different communication protocols may have different frame formats and field definitions. The MAC processing unit needs to parse the protocol-specific fields in the signal to understand the information carried by the signal and perform corresponding processing according to the protocol rules. For example, for the Ethernet protocol, the MAC processing unit needs to parse the type field of the Ethernet frame to determine the upper-layer protocol (such as IP, ARP, etc.).

[0148] (4) Data extraction and processing requirements: The MAC processing unit may need to extract specific data fields from the signal, such as the payload portion of the data packet. By analyzing the structure of the signal, the MAC processing unit can accurately extract the required data and perform further processing or transmission.

[0149] (5) The need for error detection and handling: The MAC processing unit usually performs error detection on the signal, such as CRC (Cyclic Redundancy Check). By parsing the error detection field in the signal, the MAC processing unit can determine whether there is an error in the signal and take corresponding error handling measures, such as requesting retransmission or discarding the erroneous frame.

[0150] (6) Flow control and management requirements: The MAC processing unit may participate in flow control and management functions, such as adjusting the sender's transmission rate according to the receiver's capabilities. By parsing the flow control information in the signal, the MAC processing unit can achieve effective flow management and avoid data congestion and loss.

[0151] In summary, the MAC processing unit of the RF link parses signals to perform functions such as frame synchronization, address identification, protocol processing, data extraction, error detection, and flow control, thereby ensuring correct signal reception, processing, and transmission. This is crucial for the normal operation and effective communication of the RF link. The specific parsing process and functions may vary depending on the communication protocol used and system requirements.

[0152] Therefore, in order to ensure normal signal transmission, the media access control processing unit of each radio frequency link of the wireless sensing device can parse the demodulation information of the digital signal corresponding to each radio frequency link of the wireless sensing device to determine the information of the wireless signal corresponding to each radio frequency link of the wireless sensing device.

[0153] The information of the corresponding wireless signal for each radio frequency link of the wireless sensing device may include bandwidth, power, SINR, frequency band, and channel utilization.

[0154] As described above, the wireless sensing device shown in Figure 1 provided in this application embodiment can simultaneously process wireless signals in different frequency bands. It can effectively measure multiple frequency bands and multiple standards of wireless signals simultaneously to determine whether interference exists in the wireless signal to be analyzed. The wireless sensing device provided in this application embodiment has high efficiency in sensing the coverage quality of wireless signals and low cost. It can help to digitize and visualize wireless signal quality data, providing assistance for the intelligentization and safety improvement of the industry, and providing strong support for the wireless signal operation of the rail industry.

[0155] However, in practical applications, when costs are limited, this application can also provide another wireless sensing device capable of processing wireless signals of different frequency bands and standards. As shown in Figure 2, when the radio frequency links of the other wireless sensing device provided in this application embodiment are non-independent radio frequency links, the wireless sensing device can further include a switching unit and a scheduling unit.

[0156] in,

[0157] Each radio frequency link of the wireless sensing device includes only one radio frequency front-end connector, one front-end filter, one baseband processing unit, and one media access control processing unit, and no longer has a separate mixer, a digitally controlled oscillator, a back-end filter, and an analog-to-digital converter.

[0158] Based on this, as shown in Figure 2, the RF front-end connector of each RF link of the wireless sensing device is connected to the front-end filter.

[0159] For example, the radio frequency front end of the wireless sensing device shown in Figure 2 includes three connectors: RF1, RF2, and RF3, which are input connectors for different frequency bands, and antennas of different frequency bands can be connected to the wireless sensing device shown in Figure 2.

[0160] For example, the RF1 connector can be connected to a 2.4G band antenna; the RF2 connector can be connected to a 5.8G band antenna; and the RF3 connector can be connected to a 1.8G band antenna. The RF1, RF2, and RF3 connectors can be SMA or N-type connectors, and the connector type is not limited.

[0161] The baseband processing unit of each RF link is connected to the media access control processing unit; each RF link of the wireless sensing device shares a common mixer, a common numerically controlled oscillator, a common intermediate frequency filter, and a common analog-to-digital converter.

[0162] Among them, the common mixer can be connected to the common analog-to-digital converter through the common intermediate frequency filter; the common numerically controlled oscillator can be connected to the common mixer;

[0163] Therefore, as shown in Figure 2, the baseband processing unit of each radio frequency link of the wireless sensing device can be connected to a common analog-to-digital converter.

[0164] The switching unit of the wireless sensing device can be used to control the connection between the front-end filter and the common mixer of each radio frequency link of the wireless sensing device.

[0165] A common numerically controlled oscillator can be connected to one end of the scheduling unit; the other end of the scheduling unit can be connected to the baseband processing unit and the media access control processing unit of each RF link respectively.

[0166] A common intermediate frequency inverter can act as a back-end filter for each radio frequency link of the wireless sensing device shown in Figure 1, and can be used to filter the signals of each radio frequency link.

[0167] The common numerically controlled oscillator acts as the numerically controlled oscillator for each RF link of the wireless sensing device shown in Figure 1, and can be used to output the clock signal corresponding to the signal of each RF link.

[0168] The common mixer acts as a mixer for each radio frequency link of the wireless sensing device shown in Figure 1, and can be used to perform frequency conversion processing on the signals of each radio frequency link.

[0169] The common analog-to-digital converter acts as the analog-to-digital converter for each RF link of the wireless sensing device shown in Figure 1. It can be used to perform analog-to-digital conversion sampling processing on the signal after frequency conversion by the common mixer, and output the digital signal corresponding to the signal of each RF link of the wireless sensing device, and transmit it to the baseband processing unit of the RF link of the wireless sensing device.

[0170] As shown in Figure 2, the wireless sensing device can only connect to the RF link corresponding to one frequency band at a time. Therefore, in practical applications, antennas of different frequency bands can be connected according to user needs to receive signals at frequencies corresponding to those user requirements. Thus, to ensure better signal processing, when switching the RF front-end connector of each RF link of the wireless sensing device according to user needs, the baseband processing unit and media and access control processing unit of the RF link can simultaneously switch to the mode corresponding to the input mode of the RF front-end connector of the currently connected RF link.

[0171] For example, as shown in Figure 2, the switching unit of the wireless sensing device can be switched to the corresponding radio frequency connector under the control of the scheduling unit.

[0172] The common numerically controlled oscillator can be configured to use different mixing frequencies under the control of the scheduling unit, and output different clock signals to the common mixer. The common mixer can convert the input frequencies of RF1, RF2, and RF3 to the same intermediate frequency.

[0173] As shown in Figure 2, the baseband processing unit and MAC processing unit of the radio frequency link currently connected to the wireless sensing device need to be properly configured under the control of the scheduler unit.

[0174] For example, when it is known that the input frequency of the RF1 connector is WiFi, when the RF front-end connector of the RF link is switched to the RF1 connector, the baseband processing unit and the MAC processing unit need to switch to the mode corresponding to the RF1 connector. Similarly, when the RF front-end connector of the RF link is switched to the RF2 connector or the RF3 connector, the corresponding standard also needs to achieve synchronization of RF switching, baseband switching and MAC switching in time.

[0175] Based on the wireless sensing device shown in Figure 2, wireless signals in different frequency bands can be processed. This allows for the simultaneous measurement of wireless signals across multiple frequency bands and standards, enabling the determination of whether interference exists in the wireless signal being analyzed. The wireless sensing device provided in this application embodiment has high efficiency in sensing the coverage quality of wireless signals and low cost. It helps to digitize and visualize wireless signal quality data, providing assistance for the intelligentization and security improvement of the industry, and offering strong support for the wireless signal operation in the rail industry.

[0176] The following describes, with reference to Figure 3, the flow of a multi-frequency, multi-module sensing method applicable to the wireless sensing device shown in Figure 1, as provided in the embodiments of this application. As shown in Figure 3, the flow may include the following steps:

[0177] Step S101: Connect the antennas corresponding to each frequency band according to the frequency bands of the RF front-end connectors of each RF link of the wireless sensing device.

[0178] Step S102: Receive the first target wireless signal to be analyzed through the RF front-end connectors of each RF link of the wireless sensing device.

[0179] Step S103: Analyze the received first target wireless signal using the numerically controlled oscillator of each radio frequency link of the wireless sensing device to determine the clock signal of each radio frequency link of the wireless sensing device.

[0180] Step S104: Based on the clock signal of each radio frequency link of the wireless sensing device, the received first target wireless signal is frequency-converted and filtered by the front-end filter, back-end filter and mixer of each radio frequency link of the wireless sensing device to obtain the intermediate frequency signal of each radio frequency link of the wireless sensing device.

[0181] As described above, the method provided in this application embodiment can be applied to the wireless sensing device shown in Figure 1. Based on this, the process may include the following steps:

[0182] Step S1041: Based on the clock signal of each radio frequency link of the wireless sensing device, the first target wireless signal received by each radio frequency link of the wireless sensing device is filtered by the front-end filter of each radio frequency link of the wireless sensing device to obtain the first signal corresponding to each radio frequency link of the wireless sensing device.

[0183] Step S1042: The first signal is frequency-converted by the mixer of each radio frequency link of the wireless sensing device to obtain the second signal of each radio frequency link of the wireless sensing device.

[0184] Step S1043: The second signal is filtered by the back-end filter of each radio frequency link of the wireless sensing device to obtain the intermediate frequency signal of each radio frequency link of the wireless sensing device.

[0185] Step S105: The intermediate frequency signal of each radio frequency link of the wireless sensing device is sampled and processed by the analog-to-digital converter of each radio frequency link of the wireless sensing device to obtain the digital signal corresponding to each radio frequency link of the wireless sensing device.

[0186] As described above, the method provided in this application embodiment can be applied to the wireless sensing device shown in Figure 1. Based on this, the process may include the following steps:

[0187] Step S1051: The intermediate frequency signal of each radio frequency link of the wireless sensing device is sampled by analog-to-digital conversion through the analog-to-digital converter of each radio frequency link of the wireless sensing device to obtain the analog-to-digital conversion sampling result of the intermediate frequency signal of each radio frequency link of the wireless sensing device.

[0188] Step S1052: Based on the analog-to-digital conversion sampling results of the intermediate frequency signals of each radio frequency link of the wireless sensing device, the intermediate frequency signals of each radio frequency link of the wireless sensing device are processed by analog-to-digital converters of each radio frequency link of the wireless sensing device to obtain the digital signals corresponding to each radio frequency link of the wireless sensing device.

[0189] Step S106: The baseband processing unit of each radio frequency link of the wireless sensing device decodes and demodulates the digital signal of each radio frequency link of the wireless sensing device to obtain the demodulation information of the wireless signal of each radio frequency link of the wireless sensing device.

[0190] Step S107: The media access control processing unit of each radio frequency link of the wireless sensing device analyzes the demodulation information of the wireless signal of each radio frequency link of the wireless sensing device to determine the information of the wireless signal corresponding to each radio frequency link of the wireless sensing device.

[0191] Step S108: Based on the information of the wireless signals corresponding to each radio frequency link of the wireless sensing device, assess whether there is interference in the wireless signals corresponding to each radio frequency link of the wireless sensing device.

[0192] For example, the analysis results of the signal by the wireless sensing device provided in the embodiments of this application can assess whether there is co-channel interference or adjacent channel interference in the main signal, and whether the quality of the main signal is normal.

[0193] For example, by decoding the wireless signal as described above, relevant information about the wireless signal can be obtained. By identifying the wireless signal, it can be determined which is the primary signal and which are other signals.

[0194] If other signals share the same frequency as the main signal, it is considered co-channel interference.

[0195] If the signal quality RSRP (signal power) or SINR (signal-to-interference-plus-noise ratio) of the main signal differs from the system-set threshold at different locations, it will also be defined as an abnormal main signal coverage.

[0196] As can be seen from the technical solutions described above, the method provided in this application embodiment, based on the wireless sensing device provided in this application embodiment, can process wireless signals of different frequency bands, and can effectively measure wireless signals of multiple frequency bands and multiple standards simultaneously, so as to determine whether there is interference in the wireless signal to be analyzed. The wireless sensing device provided in this application embodiment has high sensing efficiency and low cost for wireless signal coverage quality, which can help to digitize and visualize wireless signal quality data, providing assistance for the intelligentization and safety improvement of the industry, and providing strong support for the wireless signal operation of the rail industry.

[0197] As can be seen from the above description, for cost considerations, the embodiments of this application can also provide the wireless sensing device shown in FIG2. The following, with reference to FIG4, describes the flow of the multi-frequency multi-module sensing method applicable to the aforementioned wireless sensing device shown in FIG2, as provided in the embodiments of this application. As shown in FIG4, the flow can include the following steps:

[0198] Step S201: Determine the frequency and signal standard corresponding to each radio frequency front-end connector of the wireless sensing device.

[0199] Step S202: Determine the frequency and signal standard switching priority corresponding to each radio frequency front-end connector of the wireless sensing device.

[0200] Step S203: Determine the stable operating time period for the switching unit of the wireless sensing device to switch from the start to the frequency corresponding to the RF front-end connector.

[0201] Step S204: Determine the initial test frequency of the signal. Based on user requirements and the switching priority of the frequency and signal standard of each RF front-end connector of the wireless sensing device, at a preset initial moment, under the control of the scheduling unit of the wireless sensing device, switch the switching unit of the wireless sensing device to the RF connector connection corresponding to the user requirements to receive the second target wireless signal to be analyzed. At the same time, configure the common numerically controlled oscillator of the wireless sensing device to synchronize the frequency.

[0202] Step S205: Under the control of the scheduling unit, the frequency of the radio frequency link of the wireless sensing device is configured in time slots according to the preset time slot allocation conditions through the common numerically controlled oscillator of the wireless sensing device, so as to configure the frequency of the radio frequency link of the wireless sensing device to the mixing frequency corresponding to the second target wireless signal. Based on the mixing frequency corresponding to the second target wireless signal, the second target wireless signal is analyzed and a clock signal corresponding to the second target wireless signal is output.

[0203] Step S206: Based on the clock signal and mixing frequency corresponding to the second target wireless signal, the second target wireless signal is frequency-converted and filtered through the front-end filter, common mixer and common intermediate frequency filter of the radio frequency link of the wireless sensing device to obtain the intermediate frequency signal of the radio frequency link of the wireless sensing device.

[0204] As described above, the method provided in this application embodiment can be applied to the wireless sensing device shown in Figure 2. Based on this, the process may include the following steps:

[0205] Step S2061: Based on the clock signal of the radio frequency link of the wireless sensing device, the second target wireless signal is filtered by the front-end filter to obtain the third signal corresponding to the radio frequency link of the wireless sensing device.

[0206] Step S2062: The third signal corresponding to the radio frequency link of the wireless sensing device is frequency-converted by a common mixer to obtain the fourth signal corresponding to the radio frequency link of the wireless sensing device.

[0207] Step S2063: The fourth signal is filtered by a common intermediate frequency filter to obtain the intermediate frequency signal of the radio frequency link of the wireless sensing device.

[0208] Step S207: The intermediate frequency signal of the radio frequency link of the wireless sensing device is sampled and processed by the common analog-to-digital converter of the radio frequency link of the wireless sensing device to obtain the digital signal corresponding to the radio frequency link of the wireless sensing device.

[0209] In step S208, under the control of the scheduling unit, the baseband processing unit and the media access control processing unit of the radio frequency link of the wireless sensing device are configured. After a preset delay, the baseband processing unit of the radio frequency link of the wireless sensing device decodes and demodulates the digital signal corresponding to the radio frequency link of the wireless sensing device to obtain the demodulation information of the wireless signal of the radio frequency link of the wireless sensing device.

[0210] For example, the configuration of the baseband processing unit may include the following: setting up signal decimation and digital filtering to ensure that the effective sampling bandwidth of the radio frequency is 60MHz (or 80MHz), and performing data synchronization and decoding;

[0211] The configuration of the media access control processing unit may include: calling the corresponding MAC layer module to parse the protocol stack, which may include the protocol stack for ordinary Wi-Fi, LTE protocol stack, frequency hopping protocol stack, and protocol stacks for special Wi-Fi from other manufacturers.

[0212] Step S209: The media access control processing unit of the radio frequency link of the wireless sensing device analyzes the demodulation information of the wireless signal of the radio frequency link of the wireless sensing device to determine the information of the wireless signal corresponding to the radio frequency link of the wireless sensing device.

[0213] Step S210: Based on the preset first moment within the stable operating time period of the switching unit of the wireless sensing device switching from the start to the frequency corresponding to the RF front-end connector, the baseband processing unit and media access control processing unit of the RF link of the wireless sensing device continuously collect and parse the information of the wireless signal received by the RF link currently connected to the switching unit of the wireless sensing device.

[0214] Step S211: Based on the preset second moment within the stable working time period of the switching unit of the wireless sensing device from the start of switching to the frequency corresponding to the RF front-end connector, continue to execute under the control of the scheduling unit of the wireless sensing device, switch the switching unit of the wireless sensing device to the RF connector connection corresponding to the user's needs, so as to receive the second target wireless signal to be analyzed, and at the same time perform the operation of synchronizing the frequency of the common numerically controlled oscillator of the wireless sensing device, until the analysis of the information of the wireless signal received by each RF link of the wireless sensing device is completed.

[0215] Step S212: Based on the information of the wireless signal corresponding to the radio frequency link of the wireless sensing device, assess whether there is interference in the wireless signal corresponding to the radio frequency link of the wireless sensing device.

[0216] For example, the analysis results of the signal by the wireless sensing device provided in the embodiments of this application can assess whether there is co-channel interference or adjacent channel interference in the main signal, and whether the quality of the main signal is normal.

[0217] For example, in practical applications, you can first confirm the frequency and standard corresponding to the RF1 connector, the RF2 connector, and the RF3 connector of the wireless sensing device.

[0218] Then confirm the switching priority of each frequency, that is, determine the time slot allocation principle;

[0219] Generally, the principle of time slot allocation is to allocate more time to important signals and less time to unimportant signals. At the same time, the time slot allocation principle also needs to be related to vehicle speed, granularity, and the integrity of signal testing.

[0220] For example, the one-way coverage distance of 1.8G signal is 700 meters; the average distance between 2.4G signal base stations is about 300 meters; and the average distance between 5.8G signal base stations is about 200 meters.

[0221] Assuming the vehicle speed can be referenced at 80km / h, which is 22m / s;

[0222] Therefore, when allocating time slots, the test interval for 5.8G signals must be less than 9 seconds.

[0223] The test interval for 2.4G signals must be less than 13.5 seconds.

[0224] The test interval for 1.8G signals must be less than 31.5 seconds.

[0225] From the perspective of time slot allocation priority, 1.8G has the highest priority;

[0226] In practical applications, an 8-second training cycle can be set.

[0227] in,

[0228] The 2-second period represents the test time for the 5.8G signal.

[0229] 2s: The test period for 2.4G signal strength;

[0230] 4s: This is the test period for the 1.8G signal.

[0231] After the settings are completed, the initial test frequency can be determined. In actual application tests, the method provided in this application embodiment uses 2.4G as the initial switching frequency.

[0232] Determine the system stabilization time required for normal operation when switching from the switching unit to the corresponding frequency;

[0233] Assume the system settling time for normal operation after switching from the switching unit to the corresponding frequency is 8 seconds. Then:

[0234] At time 0s, switch the switching unit to the RF1 connector, and simultaneously configure the common numerically controlled oscillator (NCO) to the corresponding NCO1 frequency; assuming RF1 corresponds to the 2.4G frequency band, then configure the NCO to the frequency corresponding to the 2.4G frequency band.

[0235] The baseband processing unit and MAC processing unit of the currently connected RF link are delayed by 10µs before performing baseband decoding and MAC layer protocol parsing.

[0236] Within 2 seconds, the baseband processing unit and MAC processing unit of the currently connected RF link continuously collect the wireless signal of the corresponding frequency band of the RF1 connector and parse out the corresponding wireless signal related information.

[0237] Assuming RF2 corresponds to the 1.8 GHz band, at time 2 seconds, the switching unit is switched to the RF2 connector. The other procedures are similar to the related processing procedures described above when the switch is switched to the RF1 connector.

[0238] Assuming RF3 corresponds to the 5.8 GHz band, at time 6 seconds, the switching unit is switched to the RF3 connector. The other procedures are similar to the related processing procedures described above when the switch is switched to the RF1 connector.

[0239] At time 8s, switch the switching unit to RF1 connector;

[0240] The background control unit collects the sensed wireless signal quality information in chronological order and links it with the location information to correspond to the wireless signal quality at a certain time and location. After a long period of learning, it gradually plots the data to form a comprehensive digital twin map of the wireless signal quality of the entire subway line.

[0241] As can be seen from the technical solutions described above, the method provided in this application embodiment, based on the wireless sensing device provided in this application embodiment, can process wireless signals of different frequency bands, and can effectively measure wireless signals of multiple frequency bands and multiple standards simultaneously, so as to determine whether there is interference in the wireless signal to be analyzed. The wireless sensing device provided in this application embodiment has high sensing efficiency and low cost for wireless signal coverage quality, which can help to digitize and visualize wireless signal quality data, providing assistance for the intelligentization and safety improvement of the industry, and providing strong support for the wireless signal operation of the rail industry.

[0242] The specific processing flow of each unit in the various multi-frequency multi-module sensing methods described above can be found in the previous section on wireless sensing devices, and will not be repeated here.

[0243] The multi-frequency, multi-module sensing device provided in this application embodiment can be applied to multi-frequency, multi-module sensing equipment, such as terminals like computers. Optionally, Figure 5 shows a hardware structure block diagram of the multi-frequency, multi-module sensing device. Referring to Figure 5, the hardware structure of the multi-frequency, multi-module sensing device may include: at least one processor 1, at least one communication interface 2, at least one memory 3, and at least one communication bus 4.

[0244] In this embodiment, the number of processor 1, communication interface 2, memory 3, and communication bus 4 is at least one, and processor 1, communication interface 2, and memory 3 communicate with each other through communication bus 4.

[0245] Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0246] Memory 3 may include high-speed RAM, or it may also include non-volatile memory, such as at least one disk storage device;

[0247] The memory stores a program, which the processor can call. The program is used to implement the various processing flows in the aforementioned multi-frequency multi-module sensing scheme for terminals.

[0248] This application embodiment also provides a readable storage medium that can store a program suitable for processor execution, the program being used to: implement the various processing flows of the aforementioned terminal in the multi-frequency multi-module sensing scheme.

[0249] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0250] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0251] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Various embodiments can be combined with each other. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

A wireless sensing device, characterized in that, The wireless sensing device includes at least one radio frequency link, and each radio frequency link of the wireless sensing device corresponds to a different frequency band. When each radio frequency link of the wireless sensing device is an independent radio frequency link, each independent radio frequency link of the wireless sensing device includes a radio frequency front-end connector, a front-end filter, a digitally controlled oscillator, a mixer, a back-end filter, an analog-to-digital converter, a baseband processing unit, and a media access control processing unit. The radio frequency front-end connector of each radio frequency link of the wireless sensing device is connected to the mixer through the front-end filter. The numerically controlled oscillator of each radio frequency link of the wireless sensing device is connected to the mixer. The mixer of each radio frequency link of the wireless sensing device is connected to the analog-to-digital converter through the back-end filter. The analog-to-digital converter is connected to the media access control processing unit via the baseband processing unit; The radio frequency front-end connector of each radio frequency link of the wireless sensing device is used to connect to the antenna corresponding to each frequency band, so that each radio frequency link of the wireless sensing device can connect to wireless signals of different frequency bands. Both the front-end filter and the back-end filter are used to filter the signals of the radio frequency link; The numerically controlled oscillator is used to output the clock signal corresponding to each radio frequency link of the wireless sensing device. The mixer is used to perform frequency conversion processing on the signals of each radio frequency link of the wireless sensing device. The analog-to-digital converter is used to perform analog-to-digital conversion sampling processing on the signal after frequency conversion processing by the mixer, and output the digital signal corresponding to each radio frequency link of the wireless sensing device. The baseband processing unit is used to decode and demodulate the digital signals corresponding to the signals of each radio frequency link of the wireless sensing device, and after determining the demodulation information of the digital signals corresponding to the signals of each radio frequency link of the wireless sensing device, transmits it to the media access control processing unit. unit; The media access control processing unit is used to parse the demodulation information of the digital signal corresponding to each radio frequency link of the wireless sensing device, so as to determine the information of the wireless signal corresponding to each radio frequency link of the wireless sensing device. The wireless sensing device according to claim 1 is characterized in that, When each radio frequency link of the wireless sensing device is a non-independent radio frequency link, the wireless sensing device further includes a switching unit and a scheduling unit. in, Each radio frequency link of the wireless sensing device includes only a radio frequency front-end connector, a front-end filter, a baseband processing unit, and a media access control processing unit, and no longer has a mixer, a digitally controlled oscillator, a back-end filter, and an analog-to-digital converter. The radio frequency front-end connector of each radio frequency link of the wireless sensing device is connected to the front-end filter, and the baseband processing unit of each radio frequency link is connected to the media access control processing unit. Based on this, each radio frequency link of the wireless sensing device shares a common mixer, a common numerically controlled oscillator, a common intermediate frequency filter, and a common analog-to-digital converter. The common mixer is connected to the common analog-to-digital converter through the common intermediate frequency filter; The common numerically controlled oscillator is connected to the common mixer; The baseband processing unit of each RF link is connected to the common analog-to-digital converter. The switching unit is used to control the connection between the front-end filter of each radio frequency link of the wireless sensing device and the common mixer. The common numerically controlled oscillator is connected to one end of the scheduling unit; The other end of the scheduling unit is connected to the baseband processing unit and the media access control processing unit of each radio frequency link, respectively. The common intermediate frequency inverter is used to filter the signals of each radio frequency link; The common numerically controlled oscillator is used to output the clock signal corresponding to the signal of each RF link; The common mixer is used to perform frequency conversion processing on the signals of each RF link; The common analog-to-digital converter is used to perform analog-to-digital conversion sampling processing on the signal after frequency conversion processing by the common mixer, and outputs the signal of each radio frequency link of the wireless sensing device. The corresponding digital signal is transmitted to the baseband processing unit of the radio frequency link of the wireless sensing device. The wireless sensing device according to claim 2 is characterized in that, When the RF front-end connector of each RF link of the wireless sensing device is switched according to the user's needs, the baseband processing unit and the media and access control processing unit of the wireless sensing device are simultaneously switched to the mode corresponding to the input mode of the RF front-end connector of the currently connected RF link of the wireless sensing device. A multi-frequency, multi-module sensing method, characterized in that, Applied to the wireless sensing device of claim 1, the method includes: Connect the antennas corresponding to each frequency band according to the frequency band of the RF front-end connector of each RF link of the wireless sensing device. The first target wireless signal to be analyzed is received by the radio frequency front-end connectors of each radio frequency link of the wireless sensing device. The received first target wireless signal is analyzed using the numerically controlled oscillator of each radio frequency link of the wireless sensing device to determine the clock signal of each radio frequency link of the wireless sensing device. Based on the clock signal of each radio frequency link of the wireless sensing device, the received first target wireless signal is frequency-converted and filtered by the front-end filter, back-end filter and mixer of each radio frequency link of the wireless sensing device to obtain the intermediate frequency signal of each radio frequency link of the wireless sensing device. The intermediate frequency signal of each radio frequency link of the wireless sensing device is sampled and processed by the analog-to-digital converter of each radio frequency link of the wireless sensing device to obtain the digital signal corresponding to each radio frequency link of the wireless sensing device. The baseband processing unit of each radio frequency link of the wireless sensing device decodes and demodulates the digital signal of each radio frequency link of the wireless sensing device to obtain the demodulation information of the wireless signal of each radio frequency link of the wireless sensing device. The media access control processing unit of each radio frequency link of the wireless sensing device analyzes the demodulation information of the wireless signal of each radio frequency link of the wireless sensing device to determine the information of the wireless signal corresponding to each radio frequency link of the wireless sensing device. Based on the information of the wireless signals corresponding to each radio frequency link of the wireless sensing device, an evaluation is performed. Does the wireless signal corresponding to each radio frequency link of the wireless sensing device exhibit interference? The method according to claim 4, characterized in that, The step of performing frequency conversion and filtering processing on the received first target wireless signal based on the clock signal of each radio frequency link of the wireless sensing device, through the front-end filter, back-end filter, and mixer of each radio frequency link of the wireless sensing device, to obtain the intermediate frequency signal of each radio frequency link of the wireless sensing device, includes: Based on the clock signal of each radio frequency link of the wireless sensing device, the first target wireless signal received by each radio frequency link of the wireless sensing device is filtered by the front-end filter of each radio frequency link of the wireless sensing device to obtain the first signal corresponding to each radio frequency link of the wireless sensing device. The first signal is frequency-converted by the mixer of each radio frequency link of the wireless sensing device to obtain the second signal of each radio frequency link of the wireless sensing device. The second signal is filtered by the back-end filter of each radio frequency link of the wireless sensing device to obtain the intermediate frequency signal of each radio frequency link of the wireless sensing device. The method according to claim 4, characterized in that, The step of sampling and processing the intermediate frequency signal of each radio frequency link of the wireless sensing device through the analog-to-digital converter of each radio frequency link to obtain the digital signal corresponding to each radio frequency link of the wireless sensing device includes: The analog-to-digital converter of each radio frequency link of the wireless sensing device is used to perform analog-to-digital conversion sampling processing on the intermediate frequency signal of each radio frequency link of the wireless sensing device, so as to obtain the analog-to-digital conversion sampling processing result of the intermediate frequency signal of each radio frequency link of the wireless sensing device. Based on the analog-to-digital conversion sampling results of the intermediate frequency signals of each radio frequency link of the wireless sensing device, the intermediate frequency signals of each radio frequency link of the wireless sensing device are processed by analog-to-digital converters of each radio frequency link to obtain the digital signals corresponding to each radio frequency link of the wireless sensing device. The method according to claim 4, characterized in that, The method includes: Determine the frequency and signal standard corresponding to each radio frequency front-end connector of the wireless sensing device; Determine the frequency and signal standard switching priority corresponding to each radio frequency front-end connector of the wireless sensing device; Determine the stable operating time period for the switching unit of the wireless sensing device to switch from the initial switching to the frequency corresponding to the radio frequency front-end connector; The initial test frequency of the signal is determined. Based on the user's requirements and the switching priority of the frequency and signal standard corresponding to each RF front-end connector of the wireless sensing device, at a preset initial moment, under the control of the scheduling unit of the wireless sensing device, the switching unit of the wireless sensing device is switched to the RF connector connection corresponding to the user's requirements to receive the second target wireless signal to be analyzed. At the same time, the common numerically controlled oscillator of the wireless sensing device is configured for synchronization frequency. According to the control of the scheduling unit, the frequency of the radio frequency link of the wireless sensing device is configured in time slots according to the preset time slot allocation conditions through the common numerical control oscillator of the wireless sensing device, so as to configure the frequency of the radio frequency link of the wireless sensing device to the mixing frequency corresponding to the second target wireless signal, and analyze the second target wireless signal according to the mixing frequency corresponding to the second target wireless signal, and output a clock signal corresponding to the second target wireless signal. Based on the clock signal and mixing frequency corresponding to the second target wireless signal, the second target wireless signal is frequency-converted and filtered through the front-end filter, common mixer and common intermediate frequency filter of the radio frequency link of the wireless sensing device to obtain the intermediate frequency signal of the radio frequency link of the wireless sensing device. The intermediate frequency signal of the radio frequency link of the wireless sensing device is sampled and processed by the common analog-to-digital converter of the radio frequency link of the wireless sensing device to obtain the digital signal corresponding to the radio frequency link of the wireless sensing device. Under the control of the scheduling unit, the baseband processing unit and media access control processing unit of the radio frequency link of the wireless sensing device are configured. After a preset delay, the baseband processing unit of the radio frequency link of the wireless sensing device decodes and demodulates the digital signal corresponding to the radio frequency link of the wireless sensing device to obtain the demodulation information of the wireless signal of the radio frequency link of the wireless sensing device. The media access control processing unit of the radio frequency link of the wireless sensing device analyzes the demodulation information of the wireless signal of the radio frequency link of the wireless sensing device to determine the information of the wireless signal corresponding to the radio frequency link of the wireless sensing device. According to the switching unit of the wireless sensing device, it switches from the start to correspond to the radio frequency front-end connector. During the first preset moment within the stable operating time period of the frequency, the baseband processing unit and media access control processing unit of the radio frequency link of the wireless sensing device continuously collect and parse the information of the wireless signal received by the radio frequency link currently connected to the switching unit of the wireless sensing device. Based on the preset second moment within the stable working time period of the switching unit of the wireless sensing device from the start of switching to the frequency corresponding to the RF front-end connector, the process continues to execute under the control of the scheduling unit of the wireless sensing device, switching the switching unit of the wireless sensing device to the RF connector connection corresponding to the user's needs, so as to receive the second target wireless signal to be analyzed, and simultaneously performing the operation of synchronizing the frequency of the common numerically controlled oscillator of the wireless sensing device, until the analysis of the information of the wireless signal received by each RF link of the wireless sensing device is completed; Based on the information of the wireless signal corresponding to the radio frequency link of the wireless sensing device, assess whether there is interference in the wireless signal corresponding to the radio frequency link of the wireless sensing device. The method according to claim 7, characterized in that, The step of performing frequency conversion and filtering processing on the second target wireless signal based on the clock signal corresponding to the second target wireless signal and the mixing frequency, through the front-end filter, common mixer, and common intermediate frequency filter of the radio frequency link of the wireless sensing device, to obtain the intermediate frequency signal of the radio frequency link of the wireless sensing device, includes: Based on the clock signal of the radio frequency link of the wireless sensing device, the second target wireless signal is filtered by the front-end filter to obtain the third signal corresponding to the radio frequency link of the wireless sensing device. The third signal corresponding to the radio frequency link of the wireless sensing device is frequency-converted by the common mixer to obtain the fourth signal corresponding to the radio frequency link of the wireless sensing device. The fourth signal is filtered by the common intermediate frequency filter to obtain the intermediate frequency signal of the radio frequency link of the wireless sensing device. A multi-frequency, multi-module sensing device, characterized in that, include: One or more processors, and memory; The memory stores computer-readable instructions, which, when executed by the one or more processors, implement the steps of the multi-frequency multi-module sensing method as described in any one of claims 4 to 8. A readable storage medium, characterized in that: The readable storage medium stores computer-readable instructions that, when executed by one or more processors, cause the one or more processors to perform the steps of the multi-frequency multi-module sensing method as described in any one of claims 4 to 8.

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