32 results about "Backscatter modulation" patented technology

This disclosure provides methods, components, devices and systems for frequency-translated backscatter modulation for ambient power (AMP) tags. In some examples, a user equipment (UE) may transmit an excitation signal to an AMP tag via a first subchannel of a channel bandwidth. The AMP tag may transmit a backscattered tag response to the UE via a second subchannel of the channel bandwidth based on receiving the excitation waveform. In some examples, the AMP tag may modulate information with the backscattered tag response by translating the excitation signal to the second subchannel such that the backscattered tag response does not interfere with the excitation waveform. The second subchannel that includes the backscattered tag response may indicate one or more information bits associated with the backscattered tag response. The UE may decode information bits from the backscattered tag response using an energy detection operation.

The invention discloses a radio frequency tag backscattering modulation method and device based on impedance switching, which are applied to the technical field of radio frequency identification, and the method comprises the following steps: determining a backscattering coefficient of a radio frequency tag to be adjusted; performing frequency scanning on the working area of the radio frequency tag to be adjusted to obtain a multi-frequency reflection signal in the working area; performing multipath analysis and feature extraction processing on the multi-frequency reflection signals in sequence to obtain multipath reflection feature data; performing fusion processing on the multi-path reflection characteristic data and the backscattering coefficient to obtain a backscattering value; inputting the deviation angle of the radio frequency tag to be adjusted and the plurality of backscattering values into the constructed directional impedance optimization model to obtain a directional compensation coefficient; performing backscattering modulation processing on the to-be-adjusted radio frequency tag based on the directivity compensation coefficient to obtain an impedance switching parameter; and executing an impedance switching strategy corresponding to the impedance switching parameter. According to the method provided by the embodiment of the invention, reliable transmission of the radio frequency temperature measurement data can be ensured.

A method for communicating directly with commodity Wi-Fi transceivers (TRXs) via backscatter modulation in an integrated tag device is provided. The method includes sensing an incident Wi-Fi-compliant wake-up signal. The method than reflects the incident Wi-Fi-complaint wake-up signal by encoding data from the tag device such that the reflected signal follows the Wi-Fi standard compliant and can be decoded by another WiFi-device. An integrated device includes a downlink Wi-Fi compatible wake-up receiver that checks timing of Wi-Fi compatible signals for a wake-up packet. The device has a modulator that is turned on in response to the wake-up packet and a mixer in the modulator hat mixes tag data with a payload packet from received Wi-Fi payload. Backscatter switches backscatter the response.

The application discloses an impedance-switching-based radio frequency tag backscattering modulation method and device, and is applied to the field of radio frequency identification technology, and the method comprises the following steps: determining a backscattering coefficient of a radio frequency tag to be adjusted; performing frequency scanning on a working area of the radio frequency tag to be adjusted to obtain multi-frequency reflection signals in the working area; sequentially performing multi-path analysis and feature extraction processing on the multi-frequency reflection signals to obtain multi-path reflection feature data; performing fusion processing on the multi-path reflection feature data and the backscattering coefficient to obtain a backscattering value; inputting an offset angle of the radio frequency tag to be adjusted and the backscattering value into a constructed directional impedance optimization model to obtain a directional compensation coefficient; based on the directional compensation coefficient, performing backscattering modulation processing on the radio frequency tag to be adjusted to obtain an impedance switching parameter; and executing an impedance switching strategy corresponding to the impedance switching parameter. The method provided in the application can ensure reliable transmission of radio frequency temperature measurement data.

The invention discloses a signal transmission method and device, communication equipment and a readable storage medium, and belongs to the technical field of communication, and the signal transmission method comprises the steps that first equipment carries out backscattering modulation according to a to-be-transmitted information bit and a second signal to obtain a first signal; wherein the second signal is a carrier signal of the first signal; the first signal comprises at least one first signal unit, each first signal unit comprises two chirp spread spectrum CSS symbols, the average powers or reflection coefficients of the two CSS symbols are different, and other parameters, except the average powers and the reflection coefficients, of the two CSS symbols are the same; the information bits to be transmitted are modulated through the frequency of each CSS symbol in each first signal unit; and sending the first signal.

The present application belongs to the technical field of communications. Disclosed are a signal transmission method and apparatus, and a communication device and a readable storage medium. The signal transmission method in the embodiments of the present application comprises: a first device modulating an information bit to be transmitted, so as to obtain a first signal, wherein the first signal is obtained by adding a first part and a second part, the first part is a signal obtained by performing frequency shifting of a first frequency and filtering on a second signal, the second part is a signal obtained by performing frequency shifting of a second frequency and filtering on the second signal, the frequency shift directions of the first part and the second part are opposite, the sum of the first frequency and the second frequency is equal to the bandwidth size of the second signal, the first frequency and the second frequency form a frequency pair associated with said information bit and used for frequency shifting, and the first signal is a backscatter modulation signal of the second signal; and sending the first signal.

This disclosure provides methods, components, devices and systems for frequency-translated backscatter modulation for ambient power (AMP) tags. In some examples, a user equipment (UE) may transmit an excitation signal to an AMP tag via a first subchannel of a channel bandwidth. The AMP tag may transmit a backscattered tag response to the UE via a second subchannel of the channel bandwidth based on receiving the excitation waveform. In some examples, the AMP tag may modulate information with the backscattered tag response by translating the excitation signal to the second subchannel such that the backscattered tag response does not interfere with the excitation waveform. The second subchannel that includes the backscattered tag response may indicate one or more information bits associated with the backscattered tag response. The UE may decode information bits from the backscattered tag response using an energy detection operation.

The invention discloses a signal transmission method and device, communication equipment and a readable storage medium, and belongs to the technical field of communication, and the signal transmission method comprises the steps that first equipment modulates information bits to be transmitted to obtain a first signal; wherein the first signal is obtained by adding a first part and a second part, the first part is a signal obtained by performing frequency shift and filtering of a first frequency on the second signal, and the second part is a signal obtained by performing frequency shift and filtering of a second frequency on the second signal; the frequency shift directions of the first part and the second part are opposite, the sum of the first frequency and the second frequency is equal to the bandwidth of the second signal, and the first frequency and the second frequency are frequency pairs associated with the information bits to be transmitted and used for frequency shift. The first signal is a backscattering modulation signal of the second signal; and sending the first signal.

Methods, systems, and devices for wireless communication are described. Bistatic communications may relate to devices with energy harvesting (EH) capabilities. An interrogation network node (e.g., a network node that sends an interrogation signal to an EH-capable device) or a reader network node (e.g., a network node that receives a backscatter response) may send a scheduling request to a scheduling network node. Upon receiving a scheduling request, a scheduling network node may send two grants. One of these grants grants scheduling transmissions from the source network entity to the EH-capable device. The other grants scheduling of reception of the transmitted backscatter response from the EH-capable device. The source network node may communicate the transmission to the EH-capable device according to the first grant, and the reader network node may receive a backscatter response to the transmission from the EH-capable device according to the second grant.

Provided is a position method. The method is performed by a positioning device. The method includes: positioning a zero-power tag device based on a first radio signal from the zero-power tag device; wherein the first radio signal is actively transmitted by the zero-power tag device in response to the zero-power tag device receiving a second radio signal, or the first radio signal is passively transmitted via backscatter modulation on the second radio signal; wherein the second radio signal is used to energize the zero-power tag device or wake up the zero-power tag device.

The application provides a self-sensing and intelligent early warning method for stress of numerically controlled machining aluminum alloy shell parts, and particularly relates to the online intelligent monitoring and early warning technical field of numerically controlled machining. The method forms a conformal self-sensing array by distributing and embedding micro piezoelectric ceramic units on the surface of the aluminum alloy shell part, generates a piezoelectric charge signal, sends a self-sensing signal containing stress information after radio frequency identification backscattering modulation, receives the signal and synchronously acquires real-time machining parameters of the numerically controlled machining system, generates a real-time fusion feature vector through fusion processing of a self-adaptive weight distribution model, inputs a pre-trained pulse neural network model, outputs a stress risk probability value, synchronizes to a digital twin model for three-dimensional thermal map visualization display, and generates an execution hierarchical early warning or machining control instruction according to the stress risk probability value and a dynamic early warning threshold. The application realizes real-time, passive and distributed sensing and dynamic risk assessment of the machining stress state, and improves the timeliness of early warning and the self-controllability of machining.

The invention discloses a positioning method and device, equipment, a storage medium and a chip, and belongs to the technical field of mobile communication. The method is executed by a terminal device, comprising: positioning a zero power consumption tag device according to a first wireless signal sent by the zero power consumption tag device (601); the first wireless signal is actively transmitted after the zero-power-consumption tag equipment receives the second wireless signal or is passively transmitted by performing backscatter modulation on the second wireless signal; the second wireless signal is used for supplying energy to the zero-power-consumption tag equipment or waking up the zero-power-consumption tag equipment. According to the scheme, the energy consumption of equipment positioning is saved, and meanwhile, the application scene of equipment positioning is expanded.

Provided are a communication method and a communication device. The method comprises: a first device sends a first signal, wherein the first signal is used for providing energy for a second device and / or used for the second device to perform backscatter modulation, and the first signal is generated on the basis of a first spreading sequence in a spreading sequence set.

Techniques for carrier transmission and energy harvesting in passive or semi-passive backscatter devices are described. An apparatus may be configured to transmit information indicating a power preference of the apparatus to a first network node; receiving a radio frequency (RF) signal from the first network node, wherein the RF signal is based on the information; and transmitting data to one or more of the first network node or the second network node based on backscatter modulation of the RF signal.

The present application relates to the technical field of communications, and discloses a signal transmission method and apparatus, a communication device, and a readable storage medium. The signal transmission method in embodiments of the present application comprises: a first device performing backscatter modulation on the basis of an information bit to be transmitted and a second signal, so as to obtain a first signal, wherein the second signal is a carrier signal of the first signal, the first signal comprises at least one first signal unit, each first signal unit comprises two chirp spread spectrum (CSS) symbols, the average powers or reflection coefficients of the two CSS symbols are different, the parameters of the two CSS symbols other than the average power and the reflection coefficient are the same, and said information bit is modulated by means of the frequency of each CSS symbol in each first signal unit; and sending the first signal.

Methods, systems, and devices for wireless communications are described that provide for signaling backscatter modulation capabilities of a user equipment (UE) or other device that supports backscatter modulation. Backscatter modulation capabilities may include frequency shift capabilities, and one or more backscatter capabilities may be signaled in a capability report that is transmitted responsive to a signal from a network node or other interrogating device or reader. The capability report may indicate whether backscatter modulation with frequency shifting is supported or not supported at the UE. The capability report also may indicate one or more types of frequency shifting supported at the UE. The network node may receive the capability report and schedule a UE for communications based on the reported capabilities.

The invention discloses a fall detection system based on a BLE backscattering technology, and relates to the technical field of wireless communication. Comprising an acceleration sensing module, a baseband signal generation module, a backscattering modulation module, an energy collection and power supply management module and a terminal information processing system. The acceleration sensing module is used for acquiring three-axis acceleration data; after the baseband signal generation module encapsulates data into a broadcast protocol data unit conforming to the BLE standard, smoothing processing is carried out on the signal through GFSK, and then symbols are mapped into subcarriers with different frequencies through MFSK; the backscattering modulation module switches an impedance unit according to the received subcarriers with different frequencies, and modulates a baseband signal to an environment radio frequency carrier; and the terminal processing system receives and analyzes the BLE broadcast signal and executes a fall detection algorithm. The invention further discloses an implementation method of the fall detection system based on the BLE backscattering technology. The fall detection system based on the BLE backscattering technology has the advantages of being low in power consumption, high in compatibility and small in size.

The invention provides a self-sensing and intelligent early warning method for stress of a numerical control machining aluminum alloy shell part, and particularly relates to the technical field of numerical control machining online intelligent monitoring and early warning. According to the method, micro piezoelectric ceramic units are embedded in the surface of an aluminum alloy shell part in a distributed mode, a conformal self-sensing array is formed, and piezoelectric charge signals are generated; after radio frequency identification back scattering modulation, a self-sensing signal containing stress information is sent; receiving the signal, synchronously obtaining real-time processing parameters of a numerical control processing system, and generating a real-time fusion feature vector through fusion processing of a self-adaptive weight distribution model; inputting a pre-trained pulse neural network model, and outputting a stress risk probability value; synchronizing to a digital twinborn model for three-dimensional thermodynamic diagram visual display; and according to the stress risk probability value and the dynamic early warning threshold value, generating an execution grading early warning or processing control instruction. According to the method, real-time, passive and distributed sensing and dynamic risk assessment of the machining stress state are realized, and the early warning timeliness and the machining autonomous controllability are improved.

The present invention discloses an active frequency-shifted backscatter 2ASK modulation device, comprising a common antenna for transmission and reception, a signal directional transmission isolation module, a switch amplifying modulation circuit, and a control module; the control module is used to generate a 2ASK modulation signal and a frequency-shifted signal, the 2ASK modulation signal being output to the modulation signal input of a circuit switching unit via a first control signal output terminal of the control module, and the frequency-shifted signal being output to the frequency-shifted signal input of the circuit switching unit via a second control signal output terminal of the control module; under the action of the two signals output by the control module, the switch amplifying modulation circuit modulates the carrier signal received by the antenna, first performing ASK signal modulation, performing frequency shifting, then filtering out useless frequencies through a filter, and then amplifying the signal through a low-power amplifier and transmitting it to the antenna for transmission through a circulator. The present invention overcomes the self-interference problem of traditional Backscatter ASK communication systems during high-sensitivity reception at the AP end, ensuring good reception at the AP end.

Methods, systems, and devices for wireless communications are described. Bi-static communications may involve an energy-harvesting (EH) capable device. An interrogating network node (e.g., a network node that transmits an interrogating signal to an EH-capable device) or a reader network node (e.g., a network node that receives a backscatter response) may transmit a scheduling request to a scheduling network node. Upon receipt of the scheduling request, the scheduling network node may transmit two grants. One of the grants schedules a transmission from the source network entity to the EH-capable device. The other grant schedules reception of a backscatter response from the EH-capable device to the transmission. The source network node may communicate a transmission to the EH-capable device in accordance with the first grant, and the reader network node may receive the backscatter response to the transmission from the EH-capable device in accordance with the second grant.

The application discloses a signal transmission method, device, equipment and storage medium. The method comprises the following steps: a first communication device sends an excitation signal to a tag device; the excitation signal is obtained by modulating a pulse coded signal by using a carrier signal generated based on a differential synchronization signal; wherein the excitation signal is used for the tag device to generate a backscattering modulation signal and backscatter the backscattering modulation signal to a second communication device.

This application discloses a method, apparatus, device, and storage medium for controlling the duty cycle of backscatter communication. The method includes: acquiring the voltage values ​​of the energy storage capacitor of a passive tag node at different sampling times; calculating the voltage change rate based on the voltage values; calculating the energy harvesting power of the passive tag node based on the voltage change rate; obtaining the tag transmission power consumption of the passive tag node performing backscatter communication; determining a target duty cycle based on the energy harvesting power and the tag transmission power consumption; and controlling the on-time and off-time of the backscatter modulator of the passive tag node during the communication cycle based on the target duty cycle. This scheme uses the voltage change of the energy storage capacitor to estimate the environmental energy harvesting capability in real time, and combines this with the tag transmission power consumption to adaptively adjust the communication duty cycle, enabling the tag node to dynamically match the balance between energy input and communication consumption under energy-constrained conditions.

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a device may receive a first signal in a first set of frequency domain resources. The device may harvest energy using the first signal. The device may receive a second signal in a second set of frequency domain resources. The device may backscatter modulate data using the second signal. Numerous other aspects are described.

The invention relates to the technical field of robot automatic following and positioning, and discloses a UWB single-chip robot automatic following system based on AOA positioning, which comprises a passive UWB tag, a robot UWB base station and a cooperative positioning network formed by wireless links of the passive UWB tag and the robot UWB base station, the passive UWB tag is integrated with a rectification antenna, a micro-power-consumption controller and a backscattering modulator and is not provided with a battery. The rectification antenna receives the UWB radio frequency energy and converts the UWB radio frequency energy into direct current According to the AOA positioning-based UWB single-chip robot automatic following system, battery-free endurance is realized through passive UWB label design, the positioning precision of a complex environment is improved by fusing an AOA and TDoA hybrid positioning algorithm, the problem of multi-target conflict is solved by adopting a time division and space division multiplexing hybrid multiple access protocol, the endurance constraint of an active label is thoroughly eliminated, and the positioning precision of the robot is improved. The method can also stably work in a non-line-of-sight scene, supports simultaneous following of multiple targets, remarkably reduces the maintenance cost, and improves the positioning stability and scene adaptability.

The invention discloses an information transmission method and device, communication equipment and a readable storage medium, and belongs to the technical field of communication, and the information transmission method comprises the steps that first equipment obtains a first signal, and the first signal is a chirp spread spectrum CSS signal or a chirp Chirp signal; backscattering modulation is carried out according to the first signal to obtain a second signal, and the first signal is a carrier signal of the second signal; and sending the second signal.

The application discloses a kind of anti-collision tag chips for room division monitoring and monitoring system comprising it.The anti-collision tag chip includes radio frequency front end, controllable rectifier, super capacitor, digital baseband module and backscatter modulation module, wherein the digital baseband is used to convert data in the chip into a modulated signal, send the modulated signal to the backscatter modulation module, and control the capacitor to send only once within a limited time to avoid continuous sending.The backscatter modulation module is used to convert the modulated signal into a waveform signal, modulate it onto the carrier signal source emitted by the gateway, and send information to the receiving system through backscatter mode.The application solves the problem of anti-collision of pure random tags without memory function for the previous work in each work of the tag chip under the condition of non-real-time, energy harvesting tag chip and duty cycle of charging and working of radio frequency energy in the room division monitoring scenario.

The invention discloses a node data transmission method, system and device and a storage medium. The method comprises the following steps: an aggregation node transmits a continuous wave electromagnetic signal; the source label node performs backscattering modulation on the continuous wave electromagnetic signal according to the data to be sent to generate a first backscattering signal; the relay label node receives the first backscattering signal through an antenna, and demodulates the first backscattering signal through a detection circuit to obtain demodulation data; and performing backscattering modulation on the continuous wave electromagnetic signal according to the demodulation data to generate a second backscattering signal, and receiving and demodulating the second backscattering signal by a target node corresponding to the relay label node. According to the scheme, a backscattering relay mechanism is introduced between the label nodes, so that the label nodes not only can be used as data source nodes to execute data backscattering modulation, but also can be used as relay nodes to demodulate received backscattering signals and modulate and forward the signals again, thereby constructing a multi-hop communication link.

RFID tag ICs in a population can adjust the impedance values used to backscatter-modulate reply signals to increase the distribution or spread of backscattered signal parameters, thereby facilitating the recovery of collided tag replies. An RFID tag IC may adjust its impedance value(s) based on a reader command or independently.

The invention discloses an electric power 5G-Advanced cross-cell multi-terminal interference suppression method, which aims at solving the problem that the uplink rate is reduced due to serious same-frequency interference among cross-cells and multiple terminals in the same cell under the same-frequency networking, and constructs an uplink communication system assisted by a single intelligent reflecting surface. A system weighted throughput optimization model is established in combination with the power service priority, and a reflection phase matrix of the intelligent reflection surface, the transmission power of the active terminal, the backscattering modulation coefficient of the passive terminal and the service priority weight are jointly optimized under the condition that the transmission power of the terminal is limited. All variables are alternately solved through a heuristic iterative algorithm fusing service awareness data, interference suppression and efficient resource allocation are achieved, the system throughput and communication reliability are effectively improved, hybrid access of active and passive terminals is adapted, and the high-reliability and low-power-consumption communication requirements of an electric power scene can be met.

The application discloses a passive node chip compatible with a short-distance wireless communication protocol, which is applied to a backscatter communication system. The passive node chip comprises an antenna, a radio frequency or analog front-end module, a digital baseband module, a storage module and / or a sensing module. The antenna is used for converting a carrier signal into an electric signal. The radio frequency or analog front-end module comprises a clock demodulation submodule and a modulation submodule. The clock demodulation submodule is used for obtaining a part corresponding to clock information in the electric signal to provide a clock for the digital baseband module. The modulation submodule is used for backscatter modulation of an internal signal corresponding to internal data by using a control signal and transmitting the internal signal to a preset short-distance wireless communication protocol channel. The digital baseband module is used for protocol control and internal data acquisition, and adopts a processor-free digital baseband circuit structure. The storage module is used for storing node identity data. The sensing module is used for obtaining sensing data from an environment. The application can reduce power consumption and cost, and improve a network scale of data access and a data acquisition amount.