Abstract: Provided is an aerial-floating type communication relay apparatus capable of reducing a size and suppressing a movement of a cell footprint. The communication relay apparatus comprises an array antenna that has plural antenna elements forming a cell for performing a radio communication of a service link with a terminal apparatus, an information acquisition section that acquires information on at least one of a position and an attitude of the communication relay apparatus, and a control section that controls phases and amplitudes of plural transmission/reception signals transmitted/received via each of the plural antenna elements of the array antenna so as to fix the position of the cell footprint, based on the information on at least one of the position and the attitude of the communication relay apparatus.

Abstract: A word boundary detection method includes receiving a data stream from a data channel of a high definition multimedia interface (HDMI), and performing pattern matching upon the data stream to identify a word boundary between two consecutive codewords transmitted via the data stream. Known codewords of scrambled control vectors are involved in the pattern matching.

Abstract: In described examples, a sample and hold circuit is configured to periodically connect one input of an op-amp to a reference voltage through a switch while a second input of the op-amp is connected to an output of the op-amp. Offset cancellation is performed by storing a sampled offset on a sampling capacitor coupled to the second input of the op-amp.

Abstract: One example includes a phased array antenna system. The system includes a beamforming network to receive a beam signal to generate a plurality of element signals, each being provided to a respective one of a plurality of antenna elements. The system also includes a plurality of modulation controllers, each associated with a respective one of the plurality of antenna elements. Each of the modulation controllers can generate a beam code in response to a beamforming signal and a data code in response to a data signal. The system further includes a plurality of element adjustment circuits, each associated with a respective one of the plurality of antenna elements. Each of the plurality of element adjustment circuits can modulate the beam code and the data code onto a respective one of the plurality of element signals to generate a respective adjusted element signal that is provided to a respective radiating element.

Abstract: In one embodiment, a method includes receiving, by a device, playback content. The playback content is associated with an ATSC signal. The method also includes identifying, by the device, one or more markers in the playback content, communicating, by the device, information associated with the one or more markers to an advertisement decision engine, and receiving, by the device, a URL for an addressable targeted programmatic advertisement from the advertisement decision engine. The method further includes inserting, by the device, the addressable targeted programmatic advertisement URL into the playback content.

Abstract: Length matching and phase matching between circuit paths of differing lengths is disclosed. Two signals are specified to arrive at respective path destinations at a predetermined time and with a predetermined phase. An IC provides a first electronic signal over a first conductive path to a first destination and a second electronic signal over a second conductive path to a second destination. A first slow wave structure comprises the first conductive path and a second slow wave structure comprises the second conductive path. The effective relative permittivity of the first slow wave structure is tuned such that the first electronic signal arrives at its destination at a first time and at a first phase, and the effective relative permittivity of the second slow wave structure is tuned such that the second electronic signal arrives at its destination at a second time and at a second phase.

Abstract: Methods, systems, and devices for wireless communications are described that may enable a user equipment (UE) or base station (e.g., a next-generation NodeB (gNB)) to identify that a waveform to be generated for a scheduled transmission is formed by one or more reference signal symbols and one or more data symbols. The waveform may be contained between a beginning boundary and an ending boundary with a duration equal to a total length of the one or more reference signal symbols and the one or more data symbols. The UE, base station, or both may generate the waveform by inserting a guard internal in the one or more reference signal symbols and the one or more data symbols to enable a receiver to perform a fast Fourier transform (FFT) for each of the one or more reference signal symbols and the one or more data symbols.

Abstract: A method and device for processing a broadcast content are discussed. The method includes receiving a broadcast content of a broadcast service; displaying the broadcast content on a display screen; and detecting a first user input, in response to the first user input that is to display an ESG: displaying the ESG overlaid on the broadcast content being displayed on the display screen; determining whether information for controlling execution of an application, that is embedded in an audio component of the broadcast content, is received; and controlling the execution of the application based on the determination; or in response to the first user input that indicates a mute mode to mute sound of the broadcast content: determining whether information for controlling execution of the application, that is embedded in a video component of the broadcast content, is received; and controlling the execution of the application based on the determination.

Abstract: In some embodiments, a method obtains raw data from one or more packets received over a wireless channel via an antenna. The raw data comprises raw amplitude values and raw phase values. Each raw amplitude value and raw phase value corresponds to a respective OFDM symbol and subcarrier of a respective packet. The method further comprises processing the raw data according to an interference mitigation process and using the resulting calibrated amplitude values and calibrated phase values to determine weighted phase values. Each weighted phase value corresponds to a respective subcarrier. The method determines a phase variance for the antenna based on comparing the plurality of weighted phase values across the plurality of subcarriers. The method determines whether the wireless channel experiences line-of-sight propagation or non-line-of-sight propagation based at least in part on the phase variance.

Abstract: Embodiments provide a network access method and a device. In accordance with the method, a preamble sequence may be received by a second network device from a terminal device on a time-frequency resource occupied by the preamble sequence. A transmit beam may be determined for sending an access response message to the terminal device. The access response message can be sent to the terminal device using the transmit beam. The second access device can send the access response message to the terminal device through beamforming, so that a coverage area of the second access device can be enlarged, directivity of data sent to the terminal device can be improved, and a probability that the terminal device receives the access response message is improved. Therefore, a rate that the terminal device succeeds in accessing the second access device is improved.

Abstract: A phased array antenna is provided. The phased array antenna includes a dome shaped substrate. The phased array antenna further includes a plurality of antenna elements disposed on the substrate.

Abstract: A modified orthogonal frequency-division multiplexing (OFDM) communication system based on virtual decomposition of the channel is proposed. The system is fully compatible with standard OFDM transmitters and maintains several blocks of standard OFDM receivers. The proposed approach achieves also incoherent reception of multicarrier signals even with a simple autocovariance DPSK detector. This novel system substantially surpasses the performance of current approaches while requiring low computational complexity. Two preferred embodiments are described; one with coherent reception using pilot signals, and the second with incoherent receiver of differentially encoded signals.

Abstract: An ad-hoc wireless network is implemented by a plurality of wireless access points to detect and report failure of a concurrently implemented conventional network. The wireless access points collect and store network status information of the conventional network and send the network status information to a centralized emergency manager when failure of the conventional network is detected. The ad-hoc wireless network may also provide backhaul connectivity to a wireless access point of the failed conventional network for emergency communication.

Abstract: Embodiments are presented herein of apparatuses, systems, and methods for a wireless device to perform improved channel estimates for sensing applications such as ranging. The wireless device may determine noise characteristics, e.g., a spectrum of the variance of noise on a channel and may use the noise characteristics to estimate a response of an analog front end of the wireless device. The wireless device may correct a channel estimate based on the estimated response of the analog front end.

Abstract: A controller configured to perform a training process of sampling data using multi-phase signals which are internally generated according to a data strobe signal, and compensating for a delay time of the data strobe signal using a control code which is generated according to the sampling result.

Abstract: An operation method of a signal receiver includes sequentially receiving 0-th and first bits through one signal line, and adjusting a width of any one of a first high duration and a first low duration of a first signal corresponding to the first bit, based on values of the 0-th and first bits, when the values of the 0-th and first bits are identical to each other.

Abstract: Disclosed are a spread-spectrum decoding method for a transmitted signal and a display apparatus. The method comprises: acquiring a fixed input frequency of an input signal, and taking the fixed input frequency as a decoding frequency; performing a calculation according to the fixed input frequency to obtain a cycle number N of the input signal within a pre-set time range; determining whether, during the pre-set time range, the ratio of the number of cycles corresponding to the input frequency after the spread-spectrum processing, which is greater than or less than the decoding frequency, to the cycle number N is greater than or equal to a pre-set percentage; if so, adding a one stage pre-set adjustment frequency value to the decoding frequency or subtracting same from the decoding frequency so as to obtain a new decoding frequency; and taking the new decoding frequency as an updated decoding frequency.

Abstract: An apparatus includes a receiver buffer, a phase compensation circuit, a data sampler circuit, and an error sampler circuit. The receiver buffer may generate an equalized signal on a signal node using an input signal received via a channel. The phase compensation circuit may, in response to an initiation of a training mode, replace the equalized signal on the signal node with a reference signal. The data sampler circuit may sample, using a data clock signal, the reference signal to generate a plurality of data samples. The error sampler circuit may sample, using an error clock signal, the reference signal to generate a plurality of errors samples. The phase compensation circuit may also adjust a phase difference between the data clock signal and the error clock signal using at least some of the plurality of data samples and at least some of the plurality of error samples.

Abstract: A method for estimating arrival time based on noise cancellation includes transmitting, with a transmit terminal, an ultra-wideband pulse sequence; performing power sampling on a received ultra-wideband signal; averaging a power sampling sequence; carrying out a calculation to obtain a noise mean vector; using a sum-of-rank method to obtain a rank of a power mean column vector; setting a decision threshold; and performing time-of-arrival (TOA) estimation.

Abstract: An apparatus and method for transmitting/receiving a Forward Error Correction (FEC) packet in a mobile communication system are provided. In the FEC packet transmission method, an FEC packet transmission apparatus transmits an FEC delivery block to an FEC packet reception apparatus. The FEC delivery block includes N payloads. Each of the N payloads includes a payload header. Each payload header included in each of C payloads among the N payloads includes packet oriented header information and an FEC delivery block oriented header information fragment. The packet oriented header information is applied to a related payload, and the FEC delivery block oriented header information fragment is generated by fragmenting FEC delivery block oriented header information applied to the N payloads.

Abstract: A transmitter module for a broadband data transmission system for radio communications, comprising at least one polyphase FFT filter bank and a hopping processor is described. The at least one polyphase FFT filter bank is established as a synthesis polyphase FFT filter bank, wherein the at least one polyphase FFT filter bank comprises several filter units, wherein the transmitter module is configured to receive an input signal comprising a symbol sequence, wherein the transmitter module is configured to generate and transmit a transmission signal based on the received input signal by a frequency hopping technique, and wherein the hopping processor is configured to adjust a transmission frequency of the transmission signal. Moreover, a receiver module for a broadband data transmission system and a data transmission system are described.

Abstract: A method for Peak to Average Power Ratio (PAPR) reduction at an input of analog to digital converter (ADC) of the receiver, the method includes mapping, by a mapper, an input symbol to an output symbol that maintains a peak power constraint at the input of the ADC; wherein the mapping is responsive to previously transmitted symbols; transmitting the output symbol by the transmitter; receiving, by the receiver, a received symbol that represents the output symbol; and de-mapping the received symbol, by a de-mapper of the receiver, to a de-mapped symbol that represents the input symbol.

Abstract: A method by which a terminal transmits an uplink signal in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving downlink control information including a power boosting indicator; determining, on the basis of the power boosting indicator, first transmission power of a first symbol to which power boosting is applied and second transmission power of a second symbol to which no power boosting is applied; and transmitting the uplink signal according to the first transmission power and the second transmission power, wherein the power boosting indicator is activated when the interval between the first symbol and the second symbol is less than or equal to a predetermined distance and the difference between the first transmission power and the second transmission is greater than or equal to a predetermined power offset.

Abstract: A likelihood generation device includes a similarity detection unit, a likelihood table reference unit, and a similarity processing unit. The similarity detection unit receives a modulation scheme selection signal and a received value, detects a likelihood similarity between information bits included in the received value based on the modulation scheme selection signal, and outputs a likelihood selection signal that specifies likelihood data to be searched for and an operation selection signal that specifies an operation on the likelihood data. The likelihood table reference unit registers, as likelihood data, a small region different from other small regions in the likelihood distribution indicating the likelihood of the information bits, and extracts likelihood data based on the likelihood selection signal from the likelihood table.

Abstract: A radio communication device comprising a radio frequency circuit and a microcontroller arranged to control the radio frequency circuit. The radio communication device further comprises: a radio frequency reference connected to the radio frequency circuit and arranged to be the frequency reference of at least the symbol frequency; a MCU and a time frequency reference connected to the microcontroller.

Abstract: Radio signals including modulated radar signals of an unknown modulation type selected from among a predetermined group of modulation types are received, and a plurality of features are extracted for the received radio signals. A plurality of two dimensional (2D) maps are generated for pairs of the extracted features from the received radio signals. The 2D maps of extracted feature pairs for the received radio signals are processed using a binary tree of discriminating vectors, each of the discriminating vectors corresponding to recognition of at least one of the predetermined modulation types based on 2D feature maps and each of the discriminating vectors determined by processing 2D maps for pairs of features extracted from training samples using a support vector machine learning algorithm. The binary tree is derived by pruning permutations of sequences for applying the discriminating vectors according to iterative testing of modulation type recognition accuracy.

Abstract: A transmitter includes: a modulation circuit that modulates a data sequence using QAM by mapping the data sequence to only four symbols each of which differs in phase by 90 degrees from an adjacent one of the four symbols and at least two of which have different amplitudes; and a transmission circuit that wirelessly transmits the data sequence mapped to the four symbols through the modulation by the modulation circuit, by assigning the data sequence mapped to the four symbols through the modulation by the modulation circuit to different subcarriers for Orthogonal Frequency Division Multiplexing (OFDM).

Abstract: A method of evaluating OFDM synchronization between a transmitter and a receiver, the method carried out at the receiver and comprising, obtaining a non-coherent channel power estimate, obtaining a coherent channel power estimate, comparing the two estimates, and determining whether the receiver and the transmitter are synchronized based on the comparison.

Abstract: A channel estimation method and circuit. The channel estimation method, adapted for a receiving device of a multi-input multi-output wireless LAN system, comprises the following steps. Firstly, performing a first channel estimation operation on a long training field to obtain a plurality of first composite channel estimation values related to the long training field. Then, performing a second channel estimation operation on a signal field to obtain a plurality of second composite channel estimation values related to the signal field, and performing a third channel estimation operation on a data segment to obtain a plurality of first channel estimation values related to the data segment. Next, obtaining a plurality of second channel estimation values according to the first composite channel estimation values and the second composite channel estimation values, and adjusting the first channel estimation values related to the data segment according to the second channel estimation values.

Abstract: A method and system for a coupler that receives power from a power source, and a waveguide connected to the coupler at a first end of the waveguide. A splitter is connected to a second end of the waveguide to receive the power traveling through the waveguide, and the splitter divides the power between a plurality of outputs creating divided power. A global phase shifter is connected to a first output of the plurality of outputs of the splitter, and the global phase shifter receives the divided power. An on-chip splitter is connected to the global phase shifter and further divides the divided power into sub-divided power. An on-chip phase shifter is connected to the on-chip splitter. An OPA is connected to the on-chip splitter. A phase monitor array is connected to the OPA, and a phase controller is connected to the phase monitor array.

Abstract: After sensors are placed at three or more non-collinear locations on a surface of the component, the system receives time-series signals from the sensors while the component operates on a representative workload. The system then defines one or more triangles on the surface of the component, wherein each triangle is defined by three vertices, which coincide with different sensor locations on the surface of the component. For each triangle, the system applies a barycentric coordinate technique (BCT) to time-series signals received from sensors located at the vertices of the triangle to determine a candidate location within the triangle to place an additional sensor. The system then compares the candidate locations for each of the one or more triangles to determine a globally optimal location for the additional sensor, and a new sensor is placed at this location. This process is repeated until a desired number of sensors are placed.

Abstract: A digitally-controlled power amplifier (DPA) includes a radio frequency digital-to-analog converter (RF-DAC) constructed from nonlinearly weighted PA segments, a multiphase RF drive signal generator that drives the PA segments, and overdrive voltage control circuitry. The nonlinear weighting of the PA segments intrinsically compensates for amplitude-code-word dependent amplitude distortion (ACW-AM distortion) involved in the operation of the RF-DAC and the multiphase RF drive signal generator facilitates ACW-dependent phase distortion (ACW-PM distortion) reduction, thus obviating the need for complicated and efficiency-degrading digital predistortion. The overdrive voltage control circuitry is used to fine tune the RF output of the DPA and compensate for other non-idealities and external influences such as process, voltage, temperature (PVT), frequency and/or load impedance variations.

Abstract: A vehicular sensor system comprising an electronic control unit and a number of sensors associated with busses of the electronic control unit. The sensors may be wired in parallel with respect to their respective associated bus. The system may comprise a multi-pin power bus providing multiplex communication between the electronic control unit and the sensors. An associated method may be utilized to initialize and operate the sensor system.

Abstract: Embodiments relate to a method and an apparatus for predicting the bitrate of a repaired communication channel. The method may include, generating a dataset specifying, for a plurality of communication channels, a channel frequency response of a communication channel affected by an impairment, and a channel frequency response of the communication channel non-affected by the impairment, training, based on the dataset, a machine learning model configured to predict a channel frequency response of the repaired communication channel based on the channel frequency response of the communication channel affected by an impairment.

Abstract: Methods for processing an OFDM radar signal are provided. A plurality of Nc×NDS receive samples corresponding to a number of NDS consecutive OFDM symbols is received, each OFDM symbol comprising a plurality of Nc subcarriers modulated with a respective modulation symbol. Each of the plurality of Nc×NDS receive samples is divided by its respective modulation symbol to generate a number of NDS processed OFDM symbols. The number of NDS processed OFDM symbols is decimated to generate at least one decimated OFDM symbol. A first type discrete Fourier transform (e.g. IFFT) of the at least one decimated OFDM symbol is performed to generate at least one first transformed vector.

Abstract: A search framework for finding effective architectural building blocks for deep convolutional neural networks is disclosed. The search framework described herein utilizes a building block which incorporates branch and skip connections. At least some operations of the architecture of the building block are undefined and treated as hyperparameters which can be automatically selected and optimized for a particular task. The search framework uses random search over the reduced search space to generate a building block and repeats the building block multiple times to create a deep convolutional neural network.

Abstract: A signal receiving circuit includes a first amplifier, a switch circuit, a second amplifier and a mixer. The first amplifier is configured to amplify a radio frequency (RF) signal to generate a first amplified RF signal. The switch circuit is configured to receive the first amplified RF signal. The second amplifier is configured to receive and amplify the first amplified RF signal to generate a second amplified RF signal. The mixer is configured to modulate one of the first amplified RF signal and the second amplified RF signal to generate a mixed signal, wherein the switch circuit is configured to determine whether the first amplified RF signal is amplified by the second amplifier.

Abstract: A device for providing gated data signals includes a delay path configured to receive an input signal and output the input signal that is delayed from the input signal by a time interval; a gating signal generator configured to supply a gating signal; a gating circuit configured to receive the data signal from the delay path at the data input, receive the gating signal at the gating input, and output at the data output an output signal indicative of the received data signal when the gating signal is present at the gating input; and a delay controller configured to receive a variable delay control signal and set the delay time interval according to the delay control signal.

Abstract: According to an embodiment, a control circuit of an equalizer configured to set a first amount to a linear equalizer, determine a second amount optimizing a non-linear equalizer with respect to a first signal generated by the linear equalizer to which the first amount is set, set the second amount to the non-linear equalizer, update an amount from the first amount to a third amount smaller than the first amount based on a magnitude of the first amount, set the third amount to the linear equalizer, determine a fourth amount optimizing the non-linear equalizer with respect to a second signal generated by the linear equalizer to which the third amount is set, and update an amount from the second amount to the fourth amount.

Abstract: An electronic device comprising a matched filter to drive a LED module is disclosed. The matched filter receives an incoming rectangular pulse and outputs a modulated driving signal to drive the LED module. The optical output from the LED is captured by an optical sensor and converted to electrical signal for analysis. A decimation filter couples to the optical sensor in an effort of reducing sampling rate and quantization noise of the converted electrical signal. The modulated driving signal output from the matched filter keeps the LED current, thus LED light, matching the time-mirrored impulse response of the decimation filter to obtain or approach a theoretical maximum signal-to-noise (SNR) at a fixed amount of power.

Abstract: A system and method for detecting and compensating for carrier frequency offset is disclosed. This system compensates for CFO and calculates a corrected phase. This corrected phase may be used by, for example, an AoX algorithm, such as MUSIC, to more accurately determine the angle of arrival or angle of departure of a signal. In certain embodiments, the system oversamples the incoming signal to create a plurality of samples. The system then determines the phase of each of the plurality of samples and calculates the carrier frequency based on the time derivative of the phase. In certain embodiments, a particular portion of an incoming packet is used to determine the carrier frequency offset. In other embodiments, the system calculates the carrier frequency offset throughout an entirety of the incoming packet. Once the carrier frequency offset is determined, it can be used to adjust the received signals. These adjusted signals are then used to determine the angle of arrival or angle of departure.

Abstract: An interference detection methods and receivers for receiving an RF signal including a desired RF signal and an intermittent interference signal, estimating thermal noise of the receiver by statistically analyzing a plurality of time intervals of data of the received RF signal, including at least one data interval not including the interferer, estimating an intermittent-interference-plus-noise level by statistically analyzing an extended time interval of the data, determining an interference metric based on a ratio of the estimates, and evaluating the interference metric against one or more thresholds to detect the presence or absence of degrading RF interference. The statistical analysis may include application of order statistic filtering.

Abstract: A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts that encode transport data; a mapping part that performs such a mapping that encoded data sequentially formed by the encoding parts are not successively included in the same symbol, thereby forming data symbols; and a symbol interleaver that interleaves the data symbols. In this way, a low computational complexity can be used to perform an interleaving process equivalent to a bit interleaving process to effectively improve the reception quality at a receiving end.

Abstract: Traffic flow control is facilitated in a multi-radio access technology wireless network infrastructure. A qualification threshold value can be determined for a slave node device, as a function of the qualification threshold value, a data volume threshold value can be determined for the slave node device, and, as a function of the data volume threshold value, transmission of data to a user equipment device can be facilitated by the slave node device.

Abstract: P and N termination networks couple a P line and an N line to corresponding receiver inputs. Each termination network includes an electrostatic discharge protection T-coil having an input port coupled to the corresponding line, a terminal port, and a center tap port. At least one of the termination networks further includes at least one delay T-coil having a terminal port, a center tap port, and an input port coupled to the terminal port of a corresponding one of the electrostatic discharge protection T-coils. In a no delay mode, a multiplexer selectively connects the P and N electrostatic discharge protection T-coil center tap ports to the P and N inputs of the receiver. In a delay mode, the multiplexer selectively connects the delay T-coil center tap port to a corresponding one of the P input of the receiver and the N input of the receiver.

Abstract: An apparatus is provided which comprises: a first circuitry to sample a first input signal to generate a first sampled signal, and to sample a second input signal to generate a second sampled signal, wherein the first input signal comprises data; a second circuitry to receive the first sampled signal and the second sampled signal, and to generate a first pair of differential signals; an offset cancellation circuitry to cancel or reduce an offset in the first pair of differential signals; and a latch to receive the first pair of differential signals subsequent to the cancellation or reduction of the offset, and to output a second pair of differential signals, wherein the second pair of differential signals is indicative of the data.

Abstract: A transceiver comprising a transmitter and a receiver is a component of a user terminal. A transmitter-check signal is transmitted from the transceiver to a remote node. Errors in the transmitter-check signal are measured at the remote node. Transmitter-correction information based on the errors is determined within the remote node and sent back to the user terminal. The user terminal utilizes the transmitter-correction information to set a correction module in the terminal to counteract the errors within the transmitter.

Abstract: An IC chip, a system and a method of operating the IC chip in response to an event trigger are provided. The method includes responsive to the event trigger, coupling a pin to a source of constant current to charge an external capacitor coupled to the pin and monitoring a capacitor voltage on the pin. If the magnitude of the capacitor voltage is greater than a rising threshold, detection of a falling threshold is enabled. If the magnitude of the capacitor voltage is greater than a voltage threshold, a first response is triggered and the pin is coupled to the lower rail to discharge the external capacitor. If detection of the falling threshold is enabled and the magnitude of the capacitor voltage is less than the falling threshold, the first response is also triggered.

Abstract: The present technology relates to a signal processing device that enables TLV transmission, a signal processing method, and a program. The signal processing device includes: a demodulation processing unit that performs a demodulation process; a processing unit that performs a demux process; and a data signal line, a clock signal line, a sync signal line, and a valid signal line that are provided between the demodulation processing unit and the processing unit. A variable-length packet is transmitted between the demodulation processing unit and the processing unit through the data signal line, the clock signal line, the sync signal line, and the valid signal line. The variable-length packet is an Internet Protocol (IP) packet. The present technology can be applied to receivers that receive and process TLV streams.

Abstract: A radio station comprises means for allocating resources for communication with at least one other station, and including means for mapping data to be transmitted from at least the radio station to the at least one other station, and means for applying a cyclic shift to the data mapping, wherein this cyclic shift is adjusted depending on the number of data blocks to be mapped. A possible implementation concerns the mapping of the DVRB (Distributed Virtual Resource Block) in OFDM.