Abstract: A method of analyzing at least one periodic horizontal impairment component of an input signal is described. The input signal is received that includes at least a periodic horizontal impairment component. The at least one periodic horizontal impairment component is analyzed based on a first model, thereby obtaining a first estimated parameter set for each analyzed periodic horizontal impairment component. The at least one periodic horizontal impairment component is analyzed based on a second model, thereby obtaining a second estimated parameter set for each analyzed periodic horizontal impairment component. The first model is different to the second model. Further, the present disclosure provides a measurement instrument.

Abstract: An integrated circuit equalizes a data signal expressed as a series of symbols. The symbols form data patterns with different frequency components. By considering these patterns, the integrated circuit can experiment with equalization settings specific to a subset of the frequency components, thereby finding an equalization control setting that optimizes equalization. Optimization can be accomplished by setting the equalizer to maximize symbol amplitude.

Abstract: A communication device includes a processing circuit, the processing circuit being configured as: mapping a first information bit part used for a receiving end to a corresponding channel based on a pre-set mapping rule so as to execute spatial modulation with respect to the first information bit part of the receiving end; allocating a transmission power to the receiving end; and controlling the transmission power allocated through a mapped channel to transmit a second information bit part used for the receiving end. In the case of the first information bit parts used for multiple receiving ends being the same, the channels mapped for multiple receiving ends are the same. The multi-user spatial modulation performs spatial modulation for multiple receiving ends at the same time through a multiplexing channel of the transmitting end, improving the additional modulation order and the data transmission rate which can be obtained by each receiving end.

Abstract: There is provided systems and methods for mitigating interference from an interference signal. In one implementation the system comprises cancellation circuitry configured to: receive a first signal from a first antenna, the first signal comprising an interference component deriving from the interference signal and a desired component deriving from a desired signal; and receive a second signal comprising an interference component deriving from the interference signal and received at one or more of a different antenna or a different frequency to the first signal. The interference component in the second signal is stronger than that the interference component in the first signal. The cancellation circuitry is further configured to derive a cancellation signal from the second signal; generate an output signal by subtracting the cancellation signal from the input signal to substantially remove the interference component from the first signal; and output the output signal.

Abstract: An operating method of a terminal in a wireless communication system including a cell and the terminal includes receiving an external signal including a synchronization signal block (SSB) from the cell, the SSB including a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH), obtaining a cell identification number of the cell using the PSS and the SSS, determining a plurality of decoding priorities of a plurality of candidate indexes of the SSB, and performing decoding on the PBCH based on the plurality of decoding priorities.

Abstract: A method may be executed by a base station or mobile device to improve accuracy of a global positioning system (GPS)-based position or “geoposition” of the mobile device. A time-stamped first set of GPS data may be received via a GPS receiver, e.g., of the base station. A second set of GPS data describing a geoposition of the mobile device is received from the mobile device by the base station. A time of collection of the base station and mobile device GPS data coincides. The GPS data includes code phase and pseudo-range data from each of the GPS satellites, and may include carrier phase data. A predetermined GPS position correction technique is used to generate a corrected geoposition of the mobile device using the GPS data. The corrected geoposition is then transmitted to the mobile device and/or an external response system such as a drone or first responder.

Abstract: An apparatus, method, or computer-readable storage medium encoded with computer-executable instructions that, when executed by a computer, cause the computer to carry out a method for determining one or more directions of arrival of one or more coherent or incoherent signals with a single radio frequency channel. The apparatus may comprise: a plurality of antenna elements (110) configured to determine the one or more coherent or incoherent signals; a plurality of radio frequency switches (120) configured to selectively activate one or more of the plurality of antenna elements; and a radio frequency combiner (140) configured to combine a plurality of radio frequency signals from one or more selectively activated antenna elements of the plurality of antenna elements.

Abstract: A method for implementing an efficient clock recovery for multilane high-speed Serializer/Deserializer (SerDes) system having M interleaved lanes, has a non-recursive architecture.

Abstract: A computer-executable method and system for querying sensor data of a plurality of sensors is provided. Sensor data is received that comprising sensor data values sampled by a first sensor of said plurality of sensors according to a first compressive sampling scheme. The first compressive sampling scheme can be applied by the first sensor within a sampling time window and the received sensor data corresponds to samples of a signal within the sampling time window. The sensor data is stored in a first database. A frequency decomposition of the signal is computed based on a sparsifying transform associated with the first compressive sampling scheme and the received sensor data. The frequency decomposition comprises one or more frequency components. The one or more frequency components are stored in a second database. A query is received from a client. The query specifies an event that indicates a critical signal condition of a signal.

Abstract: The present invention relates to a method and an apparatus for transmitting and receiving data in a wireless communication system. The present invention may provide a method comprising the steps of: receiving, from a terminal, an urgent signal indicating the occurrence of an event related to an urgent situation; and transmitting, to at least one terminal included in a cell, a response signal for notifying the at least one terminal of the occurrence of the event.

Abstract: Various embodiments include techniques for detecting a poor-quality cable associated with a wired communications channel that is causing noise that interferes with a wireless communications channel. The techniques are directed towards a test that a processor performs when the cable is installed in a user system. A wireless test application, executing on one or more processors of the system, determines a noise floor for the wireless communications channel when the wired communications channel is disabled. The wireless test application determines the noise power for the wireless communications channel when the wired communications channel is enabled, thereby causing interference in the wireless communications channel. The wireless test application compares the noise power to the noise floor in order to determine whether the cable is a high-quality cable or a low-quality cable.

Abstract: Apparatuses and methods for simultaneously operating as a wireless radio and monitoring the local frequency spectrum. For example, described herein are wireless radio devices that use a secondary receiver to monitor frequencies within the operating band and prevent or avoid interferers, including in particular half-IF interferers. The systems, devices, and methods described herein may adjust the intermediate frequency in a superheterodyne receiver to select an intermediate frequency that minimizes interference. In particular, described herein are apparatuses and methods that use a second receiver which is independent of the first receiver and may be connected to the same receiving antenna to monitor the geographically local frequency spectrum and may detect spurious interferers, allowing the primary receiver to adjust the intermediate frequency and avoid spurious interferes.

Abstract: A filtering arrangement for a wireless communication receiver is disclosed. The filtering arrangement comprises an input port configured to receive a digital signal, wherein the digital signal has a signal bandwidth and comprises a desired signal, dividing circuitry configured to divide the digital signal into two or more signal parts, wherein the two or more signal parts comprise two edge signal parts, and a respective processing branch associated with each of the two or more signal parts. A processing branch configured to process a respective edge signal part comprises a digital edge filter configured to filter the edge signal part, determination circuitry configured to determine whether an un-desired signal is comprised in the edge signal part, and frequency shifting circuitry configured to frequency shift the edge signal part responsive to determination by the determination circuitry. Corresponding wireless communication receiver, filtering method and computer program product are also disclosed.

Abstract: A node is provided for a cooperative broadcast multi-hop network that employs broadcast flood routing and multi-hop transmission. The node includes antennas and a waveform module having a receiver processing chain that can include an adaptive space-spectrum whitener (ASSW) module and a multi-user RAKE (mRAKE) receiver. Each antenna can receive output a channel that includes direct-sequence spread-spectrum signals received from other nodes and multi-path components of those transmissions. The ASSW module can perform adaptive space-spectrum whitening to detect and remove interference signals received from each of the channels by performing a covariance analysis to generate channelized signals. The ASSW module can include modified Discrete Fourier Transform (MDFT) analysis and synthesis modules that generate an interference mitigated time-domain channelized signals.

Abstract: Embodiments of the present invention disclose a scheduling method, a base station, and a terminal. The method includes: performing, by a base station according to a preset matrix, orthogonal encoding on logical port information corresponding to a downlink reference signal, and mapping the logical port information obtained after the orthogonal encoding to a corresponding physical channel for sending; receiving channel quality indicator information fed back by a terminal, and calculating a spectral efficiency gain obtained after wavelength division multiplexing; and performing, according to the spectral efficiency gain, radio resource scheduling for the wavelength division multiplexing.

Abstract: A method for modulating data for transmission within a communication system. The method includes establishing a time-frequency shifting matrix of dimension N×N, wherein N is greater than one. The method further includes combining the time-frequency shifting matrix with a data frame to provide an intermediate data frame. A transformed data matrix is provided by permuting elements of the intermediate data frame. A modulated signal is generated in accordance with elements of the transformed data matrix.

Abstract: A method and a device for adaptive channel access are disclosed. In an embodiment includes adaptively adjusting, by a small base station (SBS), access parameters for small cells to ensure quality of service (QoS) to cellular users while minimizing collision probability for WiFi users.

Abstract: The present disclosure refers to base stations, user equipment and a system for wireless communication, as well as the corresponding wireless communication methods implementing mechanisms enabling fast, reliable and resource efficient retransmissions between a base station and one or a plurality of user equipment. The present disclosure is specifically directed to an uplink unicast case and a downlink multicast case and cooperates a proactive allocation of resources for a retransmission of the initial data in case that the initial data transmission fails, and a new data transmission if the initial data transmission successes.

Abstract: An apparatus is configured to operate in a wireless communications network cell that is operated so as to provide a first transmission band and a second transmission band being separated by a narrow band. The apparatus is configured to transmit a data signal using a frequency band having a center frequency. The center frequency is a frequency of the narrow band. The apparatus is configured to transmit an indicator signal in the frequency band prior to transmitting the data signal so as to indicate the transmission of the data signal.

Abstract: An apparatus for receiving signals includes a receiver for receiving a time domain signal from a transmitter, wherein at least one first information bit is mapped, resulting in at least one first mapped symbol; at least one second information bit is mapped, resulting in at least one second mapped symbol; the at least one second mapped symbol is multiplied by at least one third information bit; and the time domain signal is generated from the at least one first mapped symbol and the at least one second mapped symbol.

Abstract: A method for reference signal configuration of a wireless communication system is provided. The method includes the following actions. An uplink channel is received by a base station from a user equipment (UE). A frequency offset and a coherence time effected by a phase noise and a Doppler shift are estimated by the base station in response to the uplink channel. A reference signal format is configured by the base station in response to the frequency offset and the coherence time effected by the phase noise and the Doppler shift. A physical uplink shared channel is configured by the UE in response to the reference signal format.

Abstract: An apparatus is configured to operate in a wireless communications network cell that is operated so as to provide a first transmission band and a second transmission band being separated by a narrow band. The apparatus is configured to transmit a data signal using a frequency band having a center frequency. The center frequency is a frequency of the narrow band. The apparatus is configured to transmit an indicator signal in the frequency band prior to transmitting the data signal so as to indicate the transmission of the data signal.

Abstract: A jitter determination method for determining at least one random jitter component of an input signal is described, wherein the input signal is generated by a signal source, comprising: receiving the input signal; determining a time interval error associated with the random jitter component; determining at least one statistical moment of the time interval error based on the determined time interval error, wherein the order of the statistical moment is two or larger; at least one of determining an impulse response based on the input signal and receiving the impulse response, the impulse response being associated with at least the signal source; and determining the standard deviation of the random jitter component based on at least one of the determined statistical moment and the determined impulse response. Moreover, a measurement instrument is described.

Abstract: A multiple input multiple output network node, an access network node, a computer program and method are disclosed. The method comprises prior to transmitting signals in an unlicensed band: estimating at least one channel within the unlicensed band between at least one access network node operable to transmit in the unlicensed band and the multiple input multiple output network node; determining precoding operations required to generate a null signal beam for the at least one estimated channel; monitoring the unlicensed band using the determined precoding operations. In response to detecting the unlicensed band to be clear of signals: transmitting at least one signal in the unlicensed band with the null beam in place such that no signal is transmitted on the at least one estimated channel.

Abstract: There is provided a passive intermodulation (PIM) mitigation module for mitigating PIM within a receiver of a wireless network, the PIM mitigation module comprising: at least one processor executing a code for: receiving transmit signals transmitted by at least one transmission source, receiving received signals received by at least one reception source, computing a plurality of synthetic PIM signals from the transmit signals, wherein each of the plurality of synthetic PIM signals is a respective combination of a plurality of frequency components of the transmit signals, computing a plurality of mitigation weights for mitigating the plurality of synthetic PIM signals, and performing a PIM mitigation process on the received signal with the plurality of mitigation weights to generate clean signals to provide to the receiver.

Abstract: Systems and methods for creating non-orthogonal dimensionality between signals are disclosed. Signals are received from at least one electronic device. An adjustment of a parameter of a received signal of a first device of the at least one of the electronic device that would result in an adjusted signal that is not orthogonal but differentiates the signal from at least one other signal of the received signals is determined. An instruction is communicated to the first device to implement the adjustment of the parameter.

Abstract: A multi-tap Differential Feedforward Equalizer (DFFE) configuration with both precursor and postcursor taps is provided. The DFFE has reduced noise and/or crosstalk characteristics when compared to a Feedforward Equalizer (FFE) since DFFE uses decision outputs of slicers as inputs to a finite impulse response (FIR) unlike FFE which uses actual analog signal inputs. The digital outputs of the tentative decision slicers are multiplied with tap coefficients to reduce noise. Further, since digital outputs are used as the multiplier inputs, the multipliers effectively work as adders which are less complex to implement. The decisions at the outputs of the tentative decision slicers are tentative and are used in a FIR filter to equalize the signal; the equalized signal may be provided as input to the next stage slicers. The bit-error-rate (BER) of the final stage decisions are lower or better than the BER of the previous stage tentative decisions.

Abstract: Disclosed herein are a method for estimating a self-interference signal based on iterative estimation and an apparatus for the same. The method is configured to transmit two preamble signals from the transmission antenna of one terminal to the reception antenna thereof, to estimate third-order nonlinear distortion, which distorts a self-interference signal, based on a transmission signal and a reception signal for each of the two preamble signals, to update the reception signal by eliminating the third-order nonlinear distortion therefrom, to re-estimate the third-order nonlinear distortion based on the updated reception signal, and to estimate the self-interference signal based on the final third-order nonlinear distortion, which is acquired by repeatedly re-estimating the third-order nonlinear distortion as many times as a preset number of iterations.

Abstract: A method and an apparatus for enhancing speech are provided. The method includes: obtaining time domain speech of multiple channels acquired by a microphone array; generating frequency domain speech of at least one channel based on the time domain speech of the multiple channels; analyzing the frequency domain speech of the at least one channel to obtain a normalized enhancement coefficient of the frequency domain speech of the at least one channel; enhancing the frequency domain speech of the at least one channel by using the normalized enhancement coefficient of the frequency domain speech of the at least one channel to obtain enhanced frequency domain speech of the at least one channel; and performing an inverse Fourier transform on the enhanced frequency domain speech of the at least one channel to obtain enhanced time domain speech of the at least one channel.

Abstract: An energy storage system includes: a host; energy storage modules; a plurality of nodes, each implemented at a corresponding one of the energy storage modules and configured to monitor and control that energy storage module; a communications and data transmission medium forming a loop from a first portion of the host and sequentially through the nodes to a second portion of the host; and in each of the nodes, first and second devices configured to perform at least partially redundant communication and data transmission functions using the communications and data transmission medium.

Abstract: A system that incorporates the subject disclosure may include, for example, a process that includes adjusting a filter in electrical communication between an input terminal and a demodulator. The filter is applied to an information bearing signal, e.g., to mitigate interference, received at the input terminal, resulting in a filtered signal. An error signal is received, indicative of errors detected within information obtained by demodulation of a modulated carrier of the filtered signal. A modified filter state is determined in response to the error signal and the filter is adjusted according to the modified filter state, e.g., to improve mitigation of the interference. Other embodiments are disclosed.

Abstract: Embodiments of the present disclosure relate to methods, devices, apparatuses and computer readable storage media for Uplink Control Information (UCI) design. The method comprises determining, at a terminal device, a matrix comprising a set of non-zero linear combination coefficients for quantizing a channel between the terminal device and a network device, the matrix having spatial components and frequency components; shifting the frequency components of the matrix circularly, such that a target coefficient of the set of non-zero linear combination coefficients is located in a frequency component with a predetermined index of the frequency components in a shifted matrix; generating a first indication indicating the spatial component associated with the target coefficient in the matrix; and transmitting, to the network device, uplink control information comprising the first indication. In this way, a new solution for designing the UCI may reduce the overhead for reporting the parameters in the UCI.

Abstract: Aspects of the subject disclosure may include, for example, a device including a processing system including a processor and a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, including monitoring network traffic to determine a transmission control protocol traffic pattern, determining a target video rate from the transmission control protocol traffic pattern, and modifying an over-the-top video delivery service network according to the target video rate. Other embodiments are disclosed.

Abstract: A communication device may include a communication interface configured to receive signals and a controller configured to: receive an input signal based on the received signals; perform transform operations on the input signal to generate a spectral periodogram of the input signal; calculate spectral vector powers for each bin of a plurality of bins of the spectral periodogram; determine a median spectral power for a selected range of bins of the plurality of bins; generate a median-scaled spectral density vector based on the median spectral power and a reference spectral density of an expected signal; calculate a detection threshold vector based at least in part on the median-scaled spectral density vector; and identify one or more interference-including bins of the plurality of bins of the spectral periodogram by comparing the spectral vector powers for each bin of the plurality of bins to the detection threshold vector.

Abstract: In-band full-duplex (IBFD) wireless systems offer the ability to revolutionize frequency spectrum utilization for future networks. For IBFD systems to work, the self-interference (SI) generated by each wireless node should be sufficiently mitigated, which becomes more challenging as the bandwidth increases. RF cancellation enables this interference reduction but has been limited so far to narrowband operation or restricted to distinctive environments. Fortunately, a photonic-enabled RF canceller can provide broadband interference cancellation using photonic components in a wideband vector modulator architecture with tunable time-delay taps. An example of this canceller with 20 canceller taps provides 25 and 20 dB of cancellation over 500-MHz and 1-GHz instantaneous bandwidths, respectively, and is tunable between 0.5 and 5.5 GHz. This photonic-enabled RF canceller provides the wideband operation and high tap counts for successfully deploying future wireless systems with IBFD technology.

Abstract: Improving a status of a wireless signal includes a display, a wireless transceiver, a processor and memory to monitor a status of a wireless signal of the wireless transceiver and a Basic Input Output System (BIOS) to, in response to the status indicating a degradation of the wireless signal and receiving a command to improve the status of the wireless signal, modify a parameter of an enhanced display port (eDP) signal of the display to reduce interference with the wireless signal generated by the display of the computer.

Abstract: An apparatus and a method are provided in which a processor of a receiving apparatus regenerates time domain samples of an interfering data numerology from frequency domain received signals. The processor performs FFT, with a size corresponding to a desired data numerology, on the regenerated time domain samples to generate an interfering numerology cancellation signal. The processor subtracts the interfering numerology cancellation signal from a frequency domain received signal of the desired data numerology.

Abstract: Embodiments of the present disclosure include an OFDM receiver circuit, which includes an FFT circuit configured to calculate an FFT of a plurality of sample values received by the receiver circuit, and a smoothing circuit configured to identify equalizer coefficients for the sample values by truncating portions of an impulse response of the FFT.

Abstract: A method of frame synchronization comprises receiving a stream of bits, the stream comprising a sequence of frames, wherein each frame comprises a frame counter value representing the number of the frame in the sequence, and frame check bits for checking the validity of the frame counter value. The method comprises decoding a first section of bits, and trailing a first portion of the first section of bits as a trial counter value, and a second portion of the first section of bits as trial check bits. The method comprises checking if the trial counter value corresponds to a valid frame counter value using the trial check bits, and synchronizing based on whether the trial counter value is determined to correspond to a valid frame counter value.

Abstract: A system and method for receiving a quadrature amplitude modulation symbol. In some embodiments, the symbol has a plurality of bits and is associated with a point in a constellation of quadrature amplitude modulation points, each point of the constellation having associated with it a binary word. The method includes receiving a first analog signal carrying a modulation; performing initial estimation, to generate a first initial modulation estimate, for a portion of the first analog signal carrying a modulation; identifying, based on the first initial modulation estimate, a row of an initial candidate lookup table, the row corresponding to a region of the constellation; and reading from the row of the initial candidate lookup table a first plurality of initial candidate points of the constellation.

Abstract: A vehicle power supply control method includes switching, when a constant voltage is required of a power supply circuit in generating electric power by a power generator, the power supply circuit being connected to a primary storage battery and configured to be connected to a secondary storage battery that has a lower internal resistance than that of the primary storage battery, between connection of the secondary storage battery to the power supply circuit and disconnection of the secondary storage battery from the power supply circuit depending on the required constant voltage, current output to the power supply circuit by the power generator, and a state of charge of the secondary storage battery.

Abstract: Embodiments of the present invention include a system, method and computer program product for mitigating interference in data received by a multiple antenna array. Processor(s) executing program code identify signals from users, including active users, and by identifying these signals, mitigate interference and jamming in the received data, overall.

Abstract: A jitter determination method for determining at least one jitter component of a data signal is disclosed.

Abstract: A method of operation for an Ethernet transceiver is disclosed. The method includes entering a fast retrain sequence of steps. The fast retrain sequence of steps includes transferring two-level symbols to a link partner; and directly following transferring of the two-level symbols, transferring multi-level symbols to the link partner, the multi-level symbols having greater than two symbol levels.

Abstract: A data transmission method, a wireless network device, and a communications system are provided. The method includes: sending, by a first wireless network device, at least two channels for common information on a same carrier, where the at least two channels for common information include a first channel for common information and a second channel for common information, the first channel for common information and the second channel for common information are on different subbands of the same carrier, and the common information includes at least one of a synchronization signal, a broadcast signal, or a system message.

Abstract: A system, method, and electronic device for compensating in-phase (I) and quadrature (Q) mismatch (IQMM) are herein disclosed. The system includes an IQ mismatch compensator (IQMC) configured to compensate for IQMM between a time-domain I signal and a time-domain Q signal using filter weight coefficients, and output a compensated I signal and a compensated Q signal, a fast Fourier transformation (FFT) circuit configured to perform an FFT on the compensated I signal and the compensated Q signal to a frequency-domain compensated signal, and a coefficient updater configured to update the filter weight coefficients based on a frequency-domain observation of the frequency-domain compensated signal.

Abstract: Techniques are provided for positioning of a mobile device in a wireless network using directional positioning reference signals (PRS), also referred to as PRS beamforming. In an example method, a plurality of directional PRSs are generated for at least one cell for a base station, such that each of the plurality of directional PRSs comprises at least one signal characteristic and a direction of transmission, either or both of which may be distinct or unique. The plurality of directional PRSs is transmitted within the at least one cell, such that each of the plurality of directional PRSs is transmitted in the direction of transmission. A mobile device may acquire and measure at least one of the directional PRSs which may be identified using the associated signal characteristic. The measurement may be used to assist position methods such as OTDOA and ECID and to mitigate multipath.

Abstract: Methods, systems, and devices for wireless communications are described. A device, which may be otherwise known as user equipment (UE), may support spurious emission attenuation. A device may determine, based on a first frequency scan on a radio frequency (RF) spectrum band, that a signal strength of a signal at a frequency of the RF spectrum band satisfies a threshold. The device may perform, based on the first frequency scan on the RF spectrum band, a second frequency scan on the RF spectrum band to determine whether the signal strength of the signal at the frequency of the RF spectrum band satisfies the threshold during the second frequency scan. Subsequently, the device may determine that the signal is a spurious emission at the frequency based on the signal strength of the signal, and configure a notch filter for mitigating the spurious emission at the frequency.

Abstract: A base station may determine a Doppler metric associated with a wireless channel and a user equipment (UE). The Doppler metric may be determined from received information related to Doppler effects measured by the UE or from directly measured Doppler effects associated with uplink data received from the UE. Based on the determined Doppler metric, the base station may select one or both of a reference signal (RS) density and a channel estimation technique for the wireless channel and associated UE. The base station may transmit an indication of the RS density to the UE. Downlink data bursts and uplink data bursts may include RSs and data according to the indicated RS density. Further, the base station may transmit to the UE, an indication to communicate using the selected wireless channel estimation technique.

Abstract: Methods and systems are provided for a charge withholding converter reshuffling technique that decorrelates input power of a multi-phase switched capacitor (SC) voltage converter relative to the output power provided to a load. The load may be a cryptographic device. The technique provides a countermeasure against power analysis attacks. A controller including a first random number generator coupled to the stages of the SC voltage converter controls gating for charging a first subset of the stages. A controller including a second random number generator coupled the stages of the SC voltage converter controls gating for discharging a second subset the stages. A number of the switched capacitor stages maintain their charge beyond the switch period in which they are charged. The SC voltage converter withholds a random portion of input charge and delivers this charge to the load after a random time period.