20 results about "Interference canceller" patented technology

The invention provides an active antenna unit which can be applied to communication equipment with a transmitting-receiving common antenna. The active antenna unit comprises N radio frequency antenna links and L self-interference cancellers, N is an integer greater than 1, and L is an integer less than or equal to N, for example, L is equal to N. Each radio frequency antenna link comprises a transmitting channel, a receiving channel, a feed network and an antenna subarray. The N radio frequency antenna links meet at least one of the following conditions: the routing of the feed networks of at least two radio frequency antenna links is different; or, the N antenna sub-arrays are provided with isolation assemblies which are used for isolating signals among the N antenna sub-arrays. In addition, a self-interference canceller is connected between the transmitting channel and the receiving channel of at least one link and used for cancelling signals from the transmitting channel in the receiving channel of the link where the self-interference canceller is located. Therefore, the self-interference cancellers do not need to be connected between the transmitting channels and the receiving channels of different links in the N links, the number of the self-interference cancellers can be reduced, and the circuit complexity is reduced.

A system comprises a digitally programmable frequency chirp generator configured to generate a frequency chirp, an attenuator coupled to the digitally programmable frequency chirp generator and a directional device integrated into a cryogenic circuit configured to control superconducting qubits and coupled to the digitally programmable frequency chirp generator. The directional device comprises a main arbitrary waveform generator and an on-chip programmable self-interference canceller.

An electronic device may include wireless circuitry with a baseband processor, a digital transmitter, a digital-to-analog-converter (DAC), and an antenna. The baseband processor may produce baseband signals. The digital transmitter may generate self-interference-compensated signals based on the baseband signals. The DAC may generate radio-frequency signals for transmission by the antenna based on the self-interference-compensated signals and square-wave local oscillator waveforms. The digital transmitter may include a self-interference canceller that generates the self-interference-compensated signals. The self-interference-compensated signals may mitigate the creation of self-interferer repetition replicas that land on the carrier frequency of the radio-frequency signals. This may allow the radio-frequency signals to be free from error vector magnitude degradation and spectral regrowth that would otherwise be produced due to self-interference in the radio-frequency signals output by the DAC.

The invention discloses a receiving and transmitting device based on negentropy statistics and compressive sensing, and relates to the field of high-speed wireless communication. The device comprises a channel encoder, a modulator, a sparse encoder, a multi-channel transmitter, a multi-channel receiver, a digital preprocessor, an interference eliminator based on negentropy statistics, a signal reconstruction device based on compressive sensing, a symbol synchronizer, a multi-channel demodulator, a channel decoder and the like. According to an interference elimination technology based on negentropy statistics and a nonlinear signal reconstruction technology based on compressive sensing, under the condition that the complexity of the system is not increased, the multi-path high-speed parallel transmission capacity of the system is improved, high-speed reliable transmission is guaranteed, the anti-interference capacity of the system is improved, and the reliability of the system is improved. The antenna is especially suitable for high-speed wireless communication scenes such as microwave communication, mobile communication and scatter communication.

The embodiment of the invention provides communication equipment and a data processing method, relates to the technical field of chips, and improves the performance of the communication equipment. According to the specific scheme, the communication equipment comprises a receiving module, a sending module, an interference canceller and a phase selector. When the communication device is in a first state, the receiving module is used for sampling a received first signal based on N sampling phases to obtain N first input signals, the N sampling phases and the N filtering coefficients are in one-to-one correspondence, and N is an integer greater than or equal to 2. The interference eliminator is used for filtering the second signals sent by the sending module based on the N filtering coefficients to obtain N filtered second signals. The phase selector is used for obtaining N signal attenuation values based on the N first input signals and the N filtered second signals. And the phase selector is also used for determining the filtering coefficient corresponding to the minimum signal attenuation value in the N signal attenuation values as a target filtering coefficient.

An electronic device may include wireless circuitry with a baseband processor, a digital transmitter, a digital-to-analog-converter (DAC), and an antenna. The baseband processor may produce baseband signals. The digital transmitter may generate self-interference-compensated signals based on the baseband signals. The DAC may generate radio-frequency signals for transmission by the antenna based on the self-interference-compensated signals and square-wave local oscillator waveforms. The digital transmitter may include a self-interference canceller that generates the self-interference-compensated signals. The self-interference-compensated signals may mitigate the creation of self-interferer repetition replicas that land on the carrier frequency of the radio-frequency signals. This may allow the radio-frequency signals to be free from error vector magnitude degradation and spectral regrowth that would otherwise be produced due to self-interference in the radio-frequency signals output by the DAC.

A turbo decoder includes a first soft input soft output (SISO) decoder configured to receive systematic information, first parity information, and a first pre-log likelihood ratio (LLR), and to output a first parity LLR obtained by calculating an LLR for the first parity information, a first interleaver configured to interleave the systematic information, a second SISO decoder configured to receive an output of the first interleaver, second parity information, and a second pre-LLR, and to output a second parity LLR obtained by calculating an LLR for the second parity information, and an interference canceller configured to receive the first parity LLR from the first SISO decoder, receive the second parity LLR from the second SISO decoder, and calculate a first update parity LLR and a second update parity LLR.

The invention discloses a satellite antenna, and belongs to the technical field of antennae, the satellite antenna comprises a satellite antenna main body and a support column arranged at the bottom of the satellite antenna main body, the support column is fixedly provided with an interference canceller box, the interference canceller box is internally provided with a fan, the right side surface of the interference canceller box is provided with a heat dissipation window, and the heat dissipation window is internally provided with a fan. The device further comprises a driving rod. According to the satellite antenna, after a heat dissipation window is used for a long time and heat dissipation holes are blocked, the temperature in an interference canceller box rises, two friction plates are automatically made to abut against a circular cylinder rotating along with a fan through an automatic control mechanism and rotate along with the circular cylinder, and therefore a first rotating rod is controlled to make two external brush plates slide; impurities such as dust particles on the surface of the heat dissipation window can be automatically removed, manual climbing for manual cleaning is not needed, the labor intensity of workers is reduced, automatic control can be achieved, the self-adaptive interference canceller can play more stably, and the overall stability of the satellite antenna is improved.

The application discloses a power distribution method of a downlink non-orthogonal multiple access system based on a non-circular signal and belongs to the technical field of wireless communication systems. According to the characteristic that a non-circular signal can change the second-order statistics of a sending signal, the non-circular signal is applied to a two-user downlink non-orthogonal multiple access system, and a joint design scheme of a non-circular coefficient and power of a strong channel user is provided. The method implementation steps comprise the following steps: according to the distance between a user and a base station, determining the average channel noise ratio intensity of each user, and the residual interference intensity of an imperfect serial interference canceller adopted by a strong channel user; specifying the sending signal power of a weak channel user, the maximum sending signal power of the strong channel user, the target rate of each user and the maximum outage probability threshold of the weak channel user; and calculating the optimal signal sending parameter of the strong channel user according to a formula. The scheme is helpful to improve the transmission reliability of the strong channel user on the premise of ensuring the transmission reliability of the weak channel user.

A system and method for estimating secondary path impulse response (IR) for an active noise cancellation (ANC) system to enhance performance of the ANC system in a near-imperceptible manner is provided. An adaptive music interference canceller (AMIC) uses music signals as test signals and ANC error microphones to estimate the secondary path IR between all speakers and microphones. The system validates that the music signals have sufficient audio content to be considered an adequate test signal. Furthermore, the system employs additional signal processing to ensure that a unique IR for all speakers and microphones can be obtained using the audio test signals. New coefficients of the AMIC filter are calculated, in real time, using the music signals and can be copied into the estimated secondary path for the ANC system. A supervisor unit manages enabling and disabling the AMIC as needed for calculating and copying coefficients.

The invention relates to the technical field of power line communication, discloses an instantaneous interference elimination system and method based on artificial intelligence modeling, and is used for solving the problem of instantaneous interference caused by plugging of electrical equipment. The system comprises an instantaneous interference detector, an artificial intelligence database and an instantaneous interference canceller. The detector divides signals through a power divider, carries out delay processing on one path, stores samples after analog-to-digital conversion on the other path, dynamically compares a sampling value with a threshold value, judges interference and preliminarily recovers interference samples. A database adopts a least square support vector machine (LSSVM) and echo state network (ESN) double-level model, the LSSVM generates a linear prediction result through a radial basis kernel function, and the ESN corrects a nonlinear error by using a reserve pool and outputs a high-precision interference waveform. The canceller is matched with a database template to generate a reverse waveform (time sequence deviation is less than or equal to 1ns), and interference attenuation is greater than or equal to 20dB after superposition. The system supports dynamic parameter adjustment, such as delay adaptation, threshold value sliding window update and ESN incremental learning. Through testing, the interference detection rate is greater than or equal to 98%, the signal-to-noise ratio is increased by greater than or equal to 15dB, and the error rate is reduced to 10 <-6 >. According to the invention, through accurate modeling and real-time offset, the reliability of power line communication is significantly improved.

The invention relates to the field of wireless communication, in particular to an anti-interference communication method and device on a multi-antenna scattering channel. Comprising the following steps: receiving a pure interference signal by a protocol, generating an interference eliminator by the pure interference signal, carrying out interference elimination before communication signal detection, filtering before ball detection, and selecting a part of detected information as noise before ball detection. According to the anti-interference wireless communication mode, the interference signal forming mode of an interference party does not need to be known, and communication can be achieved under the interference conditions of ultra-strong same carrier frequency, same information transmission time slot and same code pattern.

A transceiver may include a transmit path and a receive path that are each coupled to a radio frequency (RF) interface, and a self-interference canceller (SIC). The SIC is coupled between the transmit and the receive paths. The SIC is configured to cancel a self-interference signal from a received signal on the receive path based on a transmit signal on the transmit path.

Disclosed herein, among other things, are systems and methods for removing periodic interference from a telecoil signal for ear-wearable devices. A method includes receiving a signal from a telecoil of a hearing device, and determining a base period of periodic interference present in the signal. The signal is divided into clip samples having a clip length based on the base period, and the clip samples are used to create an averaged clip of the periodic interference. The averaged clip of periodic interference is inverted and summed with the signal to cancel the periodic interference from the signal, and audio from the summed signal is played for a wearer of the hearing device.

In some aspects, the disclosure is directed to methods and systems for interference mitigation and cancellation in full duplex amplifiers for cable modem or broadband communication systems. In many implementations, an interference canceller in the downstream path may be provided to equalize composite power on the FDX upstream subbands within a predetermined range of amplitude (e.g. X dB) from the desired downstream signal on the same subband, without affecting the downstream subbands.

The utility model discloses an environmental sound noise reduction system, which comprises a multi-core processor, a power management module, a Bluetooth audio system-level chip, an audio power amplifier chip, a digital audio processor, a loudspeaker, an echo cancellation module, a key module, a storage module, a USB (Universal Serial Bus) interface and a frequency band interference eliminator, wherein the multi-core processor is connected with the power management module, the Bluetooth audio system-on-chip, the audio power amplifier chip, the digital audio processor, the loudspeaker, the echo cancellation module, the key module, the storage module, the USB interface and the frequency band interference eliminator, and the audio power amplifier chip is connected with the Bluetooth audio system-on-chip, the echo cancellation module and the loudspeaker. And the echo cancellation module is connected with the frequency band interference canceller and the audio processor. According to the utility model, a user can carry out clear player conversation without wearing an earphone, and can enjoy all-dimensional 3D sound effect and clear conversation without the earphone in an open environment.

The utility model relates to the technical field of co-frequency interference cancellers, in particular to a co-frequency interference canceller which comprises a bottom plate, a connecting plate is fixedly connected to the top end of the bottom plate, a sliding groove is formed in one side of the connecting plate, a limiting column is fixedly connected to the inner wall of the sliding groove, a placing plate is slidably connected to the surface of the limiting column, and the placing plate is fixedly connected to the top end of the bottom plate. The top end of the placing plate is fixedly connected with a limiting plate, the top end of the limiting plate is in threaded connection with a bolt, the bottom end of the bolt is provided with a pressing plate, one side of the surface of a limiting column is provided with springs, and the springs are located at the upper end and the lower end of the placing plate. According to the same-frequency interference canceller, through the arrangement of the placing plate, the limiting plate, the bolt and the pressing plate, when the same-frequency interference canceller is used, the canceller is placed on the surface of the placing plate, the limiting plate is used for limiting the canceller, the pressing plate can be driven to press and fix the four corners of the top end of the canceller by rotating the bolt, and the canceller cannot be damaged during disassembly and assembly and can be stably clamped; therefore, the effect of fixing the canceller is achieved.

An apparatus for multichannel interference cancellation in a received audio signal including two or more received audio channels to obtain a modified audio signal including two or more modified audio channels is provided. The apparatus includes a first filter unit being configured to generate a first estimation of a first interference signal depending on a reference signal. Moreover, the apparatus includes a first interference canceller being configured to generate a first modified audio channel of the two or more modified audio channels from a first received audio channel of the two or more received audio channels depending on the first estimation of the first interference signal. Furthermore, the apparatus includes a second filter unit being configured to generate a second estimation of a second interference signal depending on the first estimation of the first interference signal.

In some aspects, the disclosure is directed to methods and systems for interference mitigation and cancellation in full duplex amplifiers for cable modem or broadband communication systems. In many implementations, an interference canceller in the downstream path may be provided to equalize composite power on the FDX upstream subbands within a predetermined range of amplitude (e.g. X dB) from the desired downstream signal on the same subband, without affecting the downstream subbands.

Disclosed herein, among other things, are systems and methods for cancelling interference from a telecoil signal for ear-wearable devices. A method includes receiving a signal from a telecoil of a hearing device, and using a trigger signal to initiate recordings of segments of the telecoil signal. An interference component is isolated from the telecoil signal using the recorded segments. The interference component is inverted and added to the telecoil signal to cancel the interference component from the telecoil signal, and audio from the telecoil signal is provided to a wearer of the hearing device.