44 results about "Adjacent-channel interference" patented technology

The invention relates to the technical field of data communication, in particular to a WiFi (Wireless Fidelity)-based data communication method and system. The method comprises the following steps: acquiring a routing WiFi (Wireless Fidelity) 6 networking control authority, acquiring a signal frequency band state and identifying a frequency band load state; then, the load state is converted into a spectrogram, and throughput attenuation simulation and adjacent channel interference risk quantification are carried out; then, fitting a network congestion increment index according to the data packet loss risk and throughput attenuation data, and performing channel frequency band planning and OFDMA subcarrier allocation optimization according to the network congestion increment index; and finally, designing a WiFi (Wireless Fidelity) data communication strategy, and sending the WiFi data communication strategy to a control center to implement the optimized data communication method. According to the invention, the data communication technology is optimized, so that the data communication technology is more perfect.

This disclosure provides methods, components, devices and systems for adjacent channel interference (ACI) mitigation techniques for ultra-wideband (UWB) systems. Some aspects more specifically relate to ACI mitigation for UWB systems. In some implementations, a wireless communication device may receive control information that identifies a preamble for communications to the wireless communication device in a UWB system. The wireless communication device may receive, via a signal in the UWB system, a data packet that includes the preamble. The wireless communication device may estimate a channel impulse response (CIR) of the signal and determine an interference metric that is based on the estimated CIR. The wireless communication device may process the data packet based on the interference metric.

The invention relates to the technical field of wavelength division multiplexing, and particularly provides a sparse representation-based lower wave enhancement method of a reconfigurable optical add-drop multiplexer, which comprises the following steps of: performing conversion processing on a lower wave mixed optical signal to obtain a digital electric signal vector; wherein the lower wave mixed optical signal at least comprises a target signal and an interference signal; performing sparse decomposition processing on the electric signal vector based on the over-complete dictionary to obtain a sparse coefficient vector; wherein the over-complete dictionary at least comprises target signal atoms and interference atoms; identifying and extracting a target coefficient corresponding to the target signal atom from the sparse coefficient vector; and combining the target coefficient with the target signal atoms to obtain an enhanced target signal. According to the sparse representation-based lower wave enhancement method for the reconfigurable optical add drop multiplexer, provided by the invention, the accuracy of extracting a target signal in ROADM lower waves can be improved, and adjacent channel interference and noise are effectively inhibited, so that the performance is improved.

Disclosed are a method and a device for controlling the measuring and reporting of adjacent channel interference in a wireless communication system. The method comprises the steps of: transmitting, to a base station, a terminal capability report related to the measurement and report of sub-band-specific adjacent channel leakage (ACL) interference; receiving, from the base station, setting information that indicates a frequency resource and a time resource for the measuring and reporting of sub-band-specific ACL interference; measuring sub-band-specific ACL interference on the basis of the setting information; and reporting, to the base station, the measured sub-band-specific ACL interference.

This disclosure provides methods, devices, and systems for wireless communications. The present implementations more specifically relate to reducing the power consumption of radio frequency (RF) receivers when listening to a wireless channel. In some aspects, a wireless communication device may receive an RF signal over a wireless channel, down-covert the RF signal to baseband, and convert the baseband signal to the digital domain via an analog-to-digital converter (ADC) configured to sample the baseband signal at one of multiple sampling rates based, at least in part, on whether adjacent channel interference (ACI) is determined to be present in the received signal. For example, the wireless communication device may configure the ADC to sample at a lower rate when ACI is determined to be absent and sample at a higher rate when ACI is determined to be present, or when a packet is detected in the received signal.

The present invention relates to the field of cavity filter technology, and specifically to a small-size cavity filter for suppressing adjacent channel interference in a power base station, including a plurality of cavities, wherein the plurality of cavities are divided into two groups, and the two groups are symmetrically arranged front to back, and the ends of the two cavities on the left are provided with radio frequency connectors, wherein each cavity is provided with a resonance rod one, a resonance rod two and a resonance rod three, wherein the resonance rod one is distributed in the cavity along the length direction of the cavity, and the two ends of the resonance rod one are respectively connected to the inner wall of the cavity. In summary, the cavity filter operates in the 1.8 GHz frequency band, has low insertion loss and good frequency selectivity, can significantly attenuate interference originating from adjacent frequency bands, thereby effectively improving the anti-interference performance of the system, and according to the user's requirements for size and cost, it can be used in a single cavity cascaded with the original system, or in a multi-cavity independent use mode, and has greater flexibility in configuration.

Embodiments of the present disclosure provide a method for handling adjacent channel interference (ACI) from a first user equipment (UE), in an industrial environment including a plurality of industrial devices. The first UE being connected to a first network node located outside the industrial environment and each industrial device being equipped with a second UE connected to a second network node, located within the industrial environment. The method is performed by the second network node. The method includes detecting presence of the first UE within the industrial environment. The method includes determining that the first UE is causing ACI to one or more second UEs within the industrial environment. The method includes transmitting control information comprising including an indication to the one or more second UEs for causing the one or more second UEs to handle the determined ACI.

Provides is a method performed by a node operating an interfered network using a first mode. The interfered network is interfered by an interfering network using a second mode different from the first mode. The first mode and the second mode each provide a slot configuration for signal transmission. The method comprises the steps of obtaining a first adjacent channel interference (ACI) value for a first slot set, the first slot set comprising a first set of slots of the interfered network; obtaining a second ACI value for a second slot set, the second slot set comprising a second set of slots of the interfered network; and scheduling the signal transmission to the first slot set or to the second slot set according to the first ACI value and the second ACI value.

The present invention provides a method for quickly calculating adjacent channel interference, which includes the following steps: Step 1, determine the adjacent channel interference situation according to the bandwidth overlap between the interfering system and the interfered system; Step 2, discretize the effective range of adjacent channel interference to obtain a discretized value data table; Step 3, based on the method of discrete dimensionality reduction, calculate the adjacent channel leakage power ratio (ACLR) and the adjacent channel rejection ratio (ACRR) for the adjacent channel interference situation; Step 4, calculate the effective power of adjacent channel interference according to the ACLR and the ACRR. This method analyzes 7 situations where there is adjacent channel interference between stations, and respectively designs simple algorithms by using the method of discrete dimensionality reduction, significantly reducing the calculation complexity of adjacent channel interference. It is particularly suitable for terminals with limited computing resources such as small portable computers and tablet computers, and can meet the needs of interference coexistence analysis for complex electromagnetic environments or large-scale networks on small computing terminals.

Embodiments of the present disclosure provide a method (400) for handling adjacent channel interference, ACI, from a first user equipment, UE (112), in an industrial environment (102) comprising a plurality of industrial devices (104a-104n). The first UE (112) being connected to a first network node (110) located outside the industrial environment (102) and each industrial device (104a-104n) being equipped with a second UE (106a-106n) connected to a second network node (108), located within the industrial environment (102). The method (400) is performed by the second network node (108). The method (400) comprises detecting (212, 402) presence of the first UE (112) within the industrial environment (102). The method (400) comprises determining (214, 404) that the first UE (112) is causing ACI to one or more second UEs (106a-106n) within the industrial environment (102). The method (400) comprises transmitting (218, 410) control information comprising an indication to the one or more second UEs (106a-106n) for causing the one or more second UEs (106a-106n) to handle the determined ACI. Corresponding first network node, second network node, first UE, second UE, and computer program products are also disclosed.

Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for improved handling of adjacent channel interference in multi-link aggregation scenarios. In accordance with the described techniques, a device may establish a set of wireless links for communication with a second device, the set of wireless links supporting parallel transmission during at least a first duration of a multi-link session, the set of wireless links including at least a first wireless link and a second wireless link. The device may modify a transmission parameter for the first wireless link or a clear channel assessment (CCA) parameter for the second wireless link, or a combination thereof. The device may then perform the CCA procedure on the second wireless link and transmit at least a first portion of the message on the first wireless link based on the modified transmission parameter or modified CCA parameter.

Embodiments disclosed herein relate to techniques for measuring and / or detecting a signal-to-interference ratio (SIR) of a received signal at a user equipment (UE). The received signal may include a desired signal, co-channel interference, adjacent channel interference, and an in-band blocker. The UE may filter (e.g., remove) the various interferences and in-band blocker. The UE may determine or measure a power (or Received Signal Strength Indicator (RSSI)) of the desired signal and a power (or RSSI) of the co-channel interference separately because the desired signal and the co-channel interference overlap in frequency. To do so, the UE may determine a total power of the received signal including the desired signal and co-channel interference. The UE may receive the desired signal again while an uplink transmission is deactivated (and thus without the interference). The UE may then calculate the SIR based on the total power and the power of the desired signal.

The present application relates to the technical field of wavelength division multiplexing, and particularly provides a down-wave enhancement method of a reconfigurable optical add-drop multiplexer based on sparse representation, which converts and processes a down-wave mixed optical signal to obtain a digitized electrical signal vector; wherein the down-wave mixed optical signal at least includes a target signal and an adjacent channel interference signal; the electrical signal vector is processed by sparse decomposition based on an overcomplete dictionary to obtain a sparse coefficient vector; wherein the overcomplete dictionary at least includes a target signal atom and an adjacent channel interference atom; a target coefficient corresponding to the target signal atom is identified and extracted from the sparse coefficient vector; and the target coefficient is combined with the target signal atom to obtain an enhanced target signal. The down-wave enhancement method of the reconfigurable optical add-drop multiplexer based on sparse representation can improve the accuracy of extracting the target signal in the ROADM down-wave, effectively suppress adjacent channel interference and amplified spontaneous emission noise, and thus improve performance.

The invention provides a method, a device and a system for wireless communication. The present implementations more particularly relate to reducing power consumption of a radio frequency (RF) receiver when listening for a wireless channel. In some aspects, a wireless communication device may receive an RF signal over a wireless channel, down-convert the RF signal to a baseband, and converting the baseband signal to a digital domain via an analog-to-digital converter (ADC) configured to sample the baseband signal at one of a plurality of sampling rates based at least in part on whether adjacent channel interference (ACI) is determined to be present in the received signal. For example, a wireless communication device may configure an ADC to sample at a lower rate when an ACI is determined to be absent and to sample at a higher rate when an ACI is determined to be present or when a packet is detected in a received signal.

This invention belongs to the field of wireless communication and signal processing technology, and relates to a digital predistortion method, system, and application for power amplifiers in shortwave communication systems. This invention can cover the wide dynamic range of the power amplifier's operating range in shortwave communication systems, maintaining excellent linearization compensation across the entire power range. It effectively improves modulation signal distortion, spectral broadening, and adjacent channel interference, significantly reducing the system bit error rate and improving the quality of the transmitted signal, thus meeting the requirements for spectral and linearity specifications. This invention eliminates the need for multiple predistortion models and complex switching logic, greatly reducing system implementation complexity and storage resource overhead. When power levels switch or the signal envelope changes rapidly, it avoids additional distortion introduced by abrupt changes in predistortion parameters, ensuring continuous and stable linearization. Furthermore, this invention supports online adaptive updates, enabling real-time adaptation to changes in the nonlinear characteristics of the power amplifier, improving system robustness and environmental adaptability.

Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for improved handling of adjacent channel interference in multi-link aggregation scenarios. In accordance with the described techniques, a device may establish a set of wireless links for communication with a second device, the set of wireless links supporting parallel transmission during at least a first duration of a multi-link session, the set of wireless links including at least a first wireless link and a second wireless link. The device may modify a transmission parameter for the first wireless link or a clear channel assessment (CCA) parameter for the second wireless link, or a combination thereof. The device may then perform the CCA procedure on the second wireless link and transmit at least a first portion of the message on the first wireless link based on the modified transmission parameter or modified CCA parameter.

A method and apparatus for controlling measurement and reporting of adjacent channel interference in a wireless communication system are disclosed. The method includes the steps of: transmitting a terminal capability report related to measurement and reporting of adjacent channel leakage (ACL) interference of a specific subband to a base station; receiving setting information from the base station, the setting information indicating frequency resources and time resources for measurement and reporting of the subband-specific ACL interference; measuring the subband-specific ACL interference based on the setting information; and reporting the measured subband-specific ACL interference to the base station.

The invention relates to a signal anti-interference method and device and electronic equipment, and relates to the technical field of wireless broadband communication. The method specifically comprises the following steps: performing multi-stage notch processing on a first bandwidth signal before down-sampling to obtain power of a plurality of frequency points; determining a reconstruction frequency spectrum of the bandwidth signal according to the power of the plurality of frequencies; determining a coefficient of an anti-interference filter according to the reconstructed frequency spectrum; and configuring the anti-interference filter based on the coefficient of the anti-interference filter so as to carry out anti-interference processing on the downsampled second bandwidth signal, therefore, by determining the coefficient of the anti-interference filter and configuring the anti-interference filter based on the coefficient of the anti-interference filter, the anti-interference processing can be carried out on the downsampled second bandwidth signal. According to the invention, the second broadband signal after downsampling is subjected to anti-interference processing, attenuation of an anti-interference filter to useful signals is reduced, suppression of adjacent channel interference signals is realized, the processing effect of signal anti-interference processing is improved, and thus the quality of the signals is improved.

Systems, methods, and devices perform channel interference detection for wireless devices. Methods include receiving a signal at a wireless device, the signal including at least one data subcarrier and one or more guard subcarriers. Methods also include determining, using processing logic, that one or more guard subcarriers are available for adjacent channel interference (ACI) detection, measuring, using the processing logic, a power of each of the one or more guard subcarriers and a total power of the one or more guard subcarriers, and determining, using the processing logic, an ACI is present based, at least in part, on the measurements of the one or more guard subcarriers. Methods further include performing, using the processing logic, one or more deweighing operations based on one or more identified features of the ACI.

The present application relates to the technical field of data communication, and especially relates to a data communication method and system based on WiFi6. The method comprises the following steps: obtaining the control authority of WiFi6 networking, collecting the signal frequency band state and identifying the frequency band load state; then, converting the load state into a spectrum diagram, carrying out throughput attenuation simulation and adjacent channel interference risk quantification; then, fitting the network congestion increment index according to the data packet loss risk and the throughput attenuation data, and planning the channel frequency band and optimizing the OFDMA subcarrier allocation according to the network congestion increment index; finally, designing the WiFi6 data communication strategy and sending it to the control center to implement the optimized data communication method. The present application optimizes the data communication technology, so that the data communication technology is more perfect.

The present invention aims to address the problem that when a shortwave transmitter uses digital predistortion technology to improve transmitter efficiency, the behavioral characteristics of different frequencies within the shortwave transmitter's operating bandwidth are different, resulting in reduced communication system transmission efficiency, adjacent channel interference, increased receiver bit error rate, and impact on the stability of the entire shortwave transmitter. The present invention provides a digital predistortion method, storage medium, and device that can integrate and correct the frequency response of a shortwave power amplifier. The present invention divides the shortwave frequency into K frequency intervals, performs amplitude indexing on the frequency points within each frequency interval, obtains adaptive predistortion coefficients and a lookup table, then divides the shortwave frequency into M frequency intervals, performs frequency indexing on all frequency points according to the gain compensation table corresponding to each frequency interval, and performs real-time integration and compensation of the gain compensation values ​​of the corresponding frequency points with the amplitude-compensated predistortion signal, thereby obtaining a digital predistortion signal with a smoother frequency response of the shortwave power amplifier.

The invention discloses a receiver selectivity test method and system. The method comprises the following steps: setting a first signal generator to have expected signal frequency and expected signal power; according to the expected signal frequency and the expected signal power, multiple groups of adjacent channel interference signals under adjacent channels of the expected signal frequency are determined, each group of adjacent channel interference signals comprises a frequency offset and a power offset, and the following test steps are executed: one group of adjacent channel interference signals in the multiple groups of adjacent channel interference signals is selected; setting the interference frequency and the interference power of a second signal generator according to the selected group of adjacent channel interference signals; and controlling the first signal generator to test the receiver based on the expected signal frequency and the expected signal power and controlling the second signal generator to test the receiver based on the interference frequency and the interference power, and repeating the test steps until the test of each group of adjacent channel interference signals is completed. According to the method, the test accuracy is improved, and the receiver selectivity is effectively verified.

The application discloses a GFSK modulation method and circuit for VCO non-linear compensation, aiming at solving the modulation frequency deviation instability problem of a voltage-controlled oscillator in a two-point modulation architecture caused by control voltage fluctuation and frequency band switching. The application adds a compensation capacitor group matched with the main tuning capacitor characteristics to the FSK_MOD module, so that the capacitance value changes synchronously with the control voltage to offset the total capacitance drift of the resonant cavity; meanwhile, the output voltage of the DAC module is dynamically adjusted based on the frequency band control signal to real-time suppress the influence of the load capacitance jump across the frequency band. The corresponding circuit integrates the series compensation capacitor and the fixed capacitor in the FSK_MOD module to form a compensation branch, and configures the compensation current injection end with the operational amplifier. By using the application, the modulation frequency deviation can be stably maintained within the tolerance range required by the Bluetooth protocol in the whole working frequency band, and the anti-adjacent channel interference ability and data transmission reliability of the wireless communication system are greatly improved.

The application discloses a method, device and equipment for designing a channel filter and a computer storage medium, and relates to the technical field of wireless communication. The method comprises the following steps: acquiring a signal bandwidth, a baseband sampling rate, a frequency of adjacent channel interference, a noise power spectral density of adjacent channel interference and a noise power spectral density of a signal; calculating a normalized passband cutoff frequency, a normalized stopband cutoff frequency and a stopband attenuation according to the acquired parameters; determining a channel filter coefficient according to the normalized passband cutoff frequency, the normalized stopband cutoff frequency and the stopband attenuation, and obtaining a channel filter corresponding to the channel filter coefficient; inserting a preset value into the channel filter coefficient to obtain a target channel filter coefficient, updating the channel filter, and obtaining a target channel filter. The embodiment of the application realizes the design of a steep transition band channel filter while reducing the structural complexity.

In one embodiment, a method includes: setting, via a controller of a receiver, a plurality of gain components of the receiver for a maximum gain setting for an automatic gain control (AGC) sensitivity (SENS) mode; receiving, in a controller of the receiver, an indication that a power level of an intermediate frequency (IF) signal measured at an output of an IF amplifier of the receiver exceeds a first threshold; and transitioning from an AGC SENS mode to an AGC adjacent channel interference (ACI) mode in response to the indication that the power level of the IF signal exceeds the first threshold.

The invention discloses a synchronous monitoring system and method for mariculture net cages based on a broadband frequency modulation sonar array. In order to solve the problems that an existing monitoring means is poor in effect in a turbid water body, mutual interference is serious when multiple sonars work cooperatively and the like, the system comprises a plurality of broadband rotary scanning sonars arranged along the central vertical line of the aquaculture water body and a central control and processing unit. Each sonar is internally provided with a positive / negative frequency modulation waveform program and a matched filtering processor. The central control and processing unit distributes orthogonal emission waveforms for adjacent sonars and realizes accurate synchronous rotary scanning of all the sonars through multi-thread control; the sonar end performs local processing on echoes by using a matched filter, so that adjacent channel interference is effectively suppressed; and the central control and processing unit fuses the preprocessed data of each sonar to generate a three-dimensional acoustic image in the aquaculture water body. According to the invention, the problem of multi-sonar co-frequency interference is solved, and high-data-update-rate and non-interference synchronous monitoring of the internal space of facilities such as the mariculture net cage is realized.

The present disclosure provides methods, assemblies, devices, and systems for adjacent channel interference (ACI) mitigation techniques for ultra wide band (UWB) systems. Some aspects more specifically relate to ACI mitigation for UWB systems. In some implementations, a wireless communication device may receive control information identifying a preamble for communicating with the wireless communication device in a UWB system. A wireless communication device may receive a data packet including a preamble via a signal in a UWB system. The wireless communication device may estimate a channel impulse response (CIR) of the signal and determine an interference metric based on the estimated CIR. The wireless communication device may process the data packet based on the interference metric.

An interference management to reduce the cross-link interference, such as, co-channel interference and / or adjacent channel interference, for a shared frequency spectrum between terrestrial networks (TN) and non-terrestrial networks (NTN). The level of interference in the uplink and / or downlink caused by beams from TN and NTN to each may be determined based on one or more of beam alignment determination, beam characteristics of TN and NTN and / or interference measurement using reference signals. The management or mitigation of interference may be performed by switching of the bandwidth part (BWP) used by a user equipment (UE) to a new BWP or by reconfiguring of the details of the BWP used by the TN UE. In some scenarios, the interference may also be mitigated by switching the UE from TN to NTN.

The invention relates to the technical field of communication systems, and discloses an anti-interference wireless communication system, which comprises the following modules: a radio frequency front-end processing module used for setting receiving gain of a radio frequency transceiver, a baseband signal preprocessing module used for filtering and amplifying signals, a high-speed sampling and baseband processing module, and a signal processing module. The sampling module is used for sampling through a high-speed ADC, the selective frequency hopping module is used for dividing a working frequency band into fixed channels and numbering the fixed channels, and the variable channel bandwidth module is used for adjusting the channel bandwidth when the SNR is low and the packet loss number is high. Through the radio frequency front-end processing module and the baseband signal preprocessing module, adjacent channel interference can be suppressed, useful signals are ensured to obtain enough gain, the signal-to-noise ratio is improved, the signals are enabled to reach an optimal state before entering the high-speed sampling and baseband processing module, and thus the reliability of the signals is improved; the unmanned aerial vehicle is ensured to accurately receive and process control instructions and data and stably execute tasks.

The embodiment of the invention discloses a signal optimization method, device and equipment, and the method comprises the steps: comparing first signal frequency band data with second signal frequency band data, and automatically screening out a frequency band, namely first adjacent signal frequency band data, which is too close and possibly generates adjacent channel interference according to a preset adjacent frequency threshold value; and removing the identified adjacent interference frequency band from a second signal frequency band available for the unmanned aerial vehicle to obtain a first signal communication frequency band. And finally, the system selects the generated first signal communication frequency band to establish a special communication channel between the unmanned aerial vehicle and the remote controller so as to ensure reliable transmission of the control instruction and the telemetry data. Occupation conditions of all signals in a base station and an environment are collected in real time, adjacent threshold filtering is calculated, communication frequency points of the unmanned aerial vehicle are sufficiently isolated from nearby high-power signals, and the probability of same-frequency interference and adjacent-frequency interference is remarkably reduced. And real-time transmission of high-frequency data is facilitated, so that timeliness and accuracy of indoor navigation and obstacle avoidance are improved.