30 results about "Adjacent-channel interference" patented technology

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.

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.

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 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 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.

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 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.

The invention provides a broadband millimeter wave predistortion chip. The chip comprises a first radio frequency transmission line, a branch line coupler, a first Schottky diode core, a first electromagnetic loading circuit, a second Schottky diode core, a second electromagnetic loading circuit and a second radio frequency transmission line. The branch line coupler divides an input radio frequency signal into two paths, and the two paths are respectively processed by the Schottky diode core and the electromagnetic loading circuit and then combined into one path to be output. The Schottky diode is manufactured by adopting a gallium arsenide chip processing technology, and the amplitude and phase of a radio-frequency signal are adjusted by adjusting the direct-current bias voltage of a Schottky diode core. The chip can effectively compensate the nonlinear distortion of the radio frequency power amplifier, improve the linearity of a communication system, reduce the bit error rate and adjacent channel interference, is suitable for a millimeter wave communication system with high transmission rate, wide band, miniaturization and high integration level, and has a wide application prospect.

A method and system for a WiFi radio and a ultrawide band (UWB) radio to co-exist. A UWB transmission is detected and based on the UWB transmission generating adjacent channel interference to the WiFi radio, a transmit power of the WiFi radio is only reduced and a WiFi signal with the reduced transmit power is transmitted. Based on the UWB transmission generating overlapping frequency interference with the WiFi radio, causing a WiFi signal with the one or more of a reduced transmit power, reduced modulation coding scheme, or reduced operating bandwidth to be transmitted.

The invention relates to a system and a method for improving the spectrum utilization rate for high-orbit satellite communication. The system comprises a channel sensing unit for extracting a pilot signal from a downlink, calculating a signal-to-noise ratio (SNR) and a bit error rate (BER) of a channel in real time, and dividing channel states into a plurality of levels; the dynamic decision engine is used for receiving the channel state grade, the SNR and the BER parameters; the dynamic decision engine outputs an optimal strategy combination through a table look-up method; the satellite side adaptation unit dynamically configures an LDPC encoder of a physical layer and a TCP protocol stack of a transmission layer according to the strategy combination; the ground side adaptation unit generates a precoding coefficient in real time according to an interference matrix fed back by the satellite-ground link to suppress adjacent channel interference; the NOMA signal processing unit is used for performing power domain superposition and serial interference cancellation (SIC) decoding on the multi-user signals according to the strategy combination; and the feedback control unit is used for monitoring the throughput rate and the packet error rate of the received signal, and sending an instruction to the dynamic decision engine to trigger fine adjustment of the strategy combination when the performance deviates from an expected value.

A communication control device according to an aspect of the present disclosure includes an interference ratio calculating unit that calculates an adjacent channel interference ratio between a first radio system, which is a protection target, and a second radio system, which is an interference source, when the second radio system shares and uses radio wave used by the first radio system and a guard band calculating unit that calculates a guard band necessary for a channel of the first radio system or the second radio system based on the adjacent channel interference ratio.

The invention relates to the technical field of wireless communication, and particularly discloses a spectrum sharing network efficiency evaluation method based on accurate interference analysis, which comprises the following steps of: constructing a spectrum sharing network model according to deployment parameters and signal transmission parameters of a base station; determining the ratio of the adjacent channel leakage signal power to the emission signal power in the effective noise bandwidth based on the emission signal template; determining adjacent channel interference power and co-channel interference power among all the base stations in the network according to the ratio; and evaluating the channel capacity of the spectrum sharing network based on the adjacent channel interference power and the co-channel interference power. According to the method, the spectrum analysis of the transmitting signal template is introduced, accurate calculation of the ratio of the adjacent channel leakage signal power to the main channel power is achieved for the first time, the problem that adjacent channel interference is simplified or ignored in a traditional method is solved, and the technical blank of spectrum sharing network interference analysis is filled.

The invention discloses an anti-interference receiving front-end circuit, which comprises a current mode anti-interference transconductance amplifier, a down-conversion switching network and a first-order RC (Resistance-Capacitance) filtering transimpedance amplification network, the current mode anti-interference transconductance amplifier is used for converting a radio frequency input voltage signal into a radio frequency current; the down-conversion switching network is used for converting the radio-frequency current into an intermediate-frequency current; the first-order RC filtering transimpedance amplification network is used for filtering high-frequency clutter components in the intermediate-frequency current, converting the intermediate-frequency current into intermediate-frequency voltage and outputting the intermediate-frequency voltage; the current mode anti-interference transconductance amplifier adopts a current multiplexing active negative feedback amplifier structure, the down-conversion switch network adopts a passive double-balance frequency conversion switch circuit, and the first-order RC filtering transresistance amplification network comprises a differential operational amplifier and a first-order RC low-pass filter. According to the invention, when the adjacent channel interference power reaches 0dBm, the receiving front end can obtain gain compression less than 3dB and a noise coefficient superior to 10dB, so that the anti-interference capability is greatly improved.

The present application relates to a kind of PDT terminal equipment processing methods based on PSD adaptive frequency hopping to suppress adjacent channel interference.The signal abnormal value filtering from radio frequency signal reception includes: radio frequency signal reception: through radio frequency module, the downlink / uplink signal of real-time acquisition PDT base station or terminal;Spectrum density analysis: the power spectrum density of received signal is calculated by fast Fourier transform, and the interference peak in spectrum is identified;Frequency hopping and threshold judgment: when it is judged that there is and interference continues to exceed preset frame number, adaptive frequency hopping is carried out according to the frequency band where interference is located, and the signal after frequency hopping is obtained;Down conversion, low-pass filtering and abnormal value filtering: the signal after frequency hopping is down converted, and Kaiser window filter and abnormal value filtering are used, and clean intermediate frequency signal is output for subsequent demodulation.The present application proposes the closed-loop solution of "spectrum sensing-dynamic threshold-adaptive frequency hopping-residual filtering", and realizes the accurate suppression of adjacent channel interference and the improvement of communication reliability.

The invention belongs to the technical field of microwave passive devices, and discloses a millimeter wave filtering power divider based on a metal gap waveguide and a working method thereof, and the millimeter wave filtering power divider comprises an input port channel, a split-ring resonator, a filtering power divider, a metal upper wall and a metal lower wall. The metal upper wall and the metal lower wall are stacked up and down. The input port channel and the filtering power divider are arranged between the metal upper wall and the metal lower wall. The filtering power divider is of a metal gap waveguide structure, and a fourth-order resonant cavity is arranged in the metal gap waveguide structure. The input port channel is connected with an input port of the filtering power divider, and the split resonant ring is arranged in the input port channel; wherein the split resonant ring is used for generating a transmission zero point outside a passband of the filtering power divider; the device size is greatly reduced, the electromagnetic loss is reduced, the filtering bandwidth can be expanded, the resonant frequency can be flexibly adjusted, the filtering performance is effectively improved, and adjacent channel interference is reduced.

The invention discloses a GFSK (Gaussian Frequency Shift Keying) modulation method and circuit for VCO (Voltage Controlled Oscillator) nonlinear compensation, and aims to solve the problem of modulation frequency offset instability caused by control voltage fluctuation and frequency band switching of a voltage-controlled oscillator in a two-point modulation architecture. According to the invention, the compensation capacitor group matched with the main tuning capacitor characteristic is additionally arranged on the FSKMOD module, so that the capacitance value of the FSKMOD module synchronously changes along with the control voltage to offset the total capacitance drift of the resonant cavity; and meanwhile, the output voltage of the DAC module is dynamically adjusted based on the frequency band control signal, and the influence of load capacitance jump during frequency band crossing is inhibited in real time. According to the corresponding circuit, a series compensation capacitor and a fixed capacitor are integrated in the FSKMOD module to form a compensation branch, and a compensation current injection end linkage operational amplifier is configured in the DAC module. By using the invention, the modulation frequency offset can be stably maintained in a tolerance range required by a Bluetooth protocol in a full working frequency band, and the adjacent channel interference resistance and the data transmission reliability of a wireless communication system are greatly improved.