Abstract: An interference identification device according to the present invention includes a feature calculation unit that calculates, using an electromagnetic wave received during a sample data analysis length, at least one type of feature of the electromagnetic wave, an interference identification unit that identifies a cluster to which the at least one type of feature belongs, among a plurality of clusters, each of the plurality of clusters having a region defined in a cluster space in which one type of feature corresponds to one dimension, and a sample data analysis length update unit that updates the sample data analysis length based on a distance, in the cluster space, between the at least one type of feature and the cluster.

Abstract: Systems, methods, and circuitries are provided to perform bidirectional communication using edge timing. In one example, a method includes receiving, on a first signal line, a first signal having a first timing edge and a first data edge. The first timing edge is of a different type than the first data edge. The first data edge is an edge immediately adjacent to the first timing edge and occurs at a first elapsed time after the first timing edge. The method includes sampling the first signal at a predetermined sample time after the first timing edge to determine a first data value. A second data value is determined and a second signal is generated having a second timing edge and a second data edge. A second elapsed time between the second timing edge and the second data edge encodes a second data value. The second signal is transmitted on a second signal line.

Abstract: This application provides a signal transmission method and system, and relates to the field of communications technologies. The system includes an equalization module, a first decoder, and a feedback module. The equalization module includes at least two multi-symbol detectors. The feedback module is connected to the first decoder and the at least two multi-symbol detectors. The equalization module performs equalization processing on convolutional data flows to obtain an equalized data flow. In this process, each multi-symbol detector performs multi-symbol detection processing on a convolutional data flow input into the multi-symbol detector. The first decoder decodes the equalized data flow to obtain a decoded data flow. The feedback module feeds back a feedback data flow to the at least two multi-symbol detectors. The equalization module performs equalization processing on the convolutional data flows based on the feedback data flow.

Abstract: Device, methods and systems for recoding in wireless systems using orthogonal time frequency space multiplexing are described. An exemplary method for transmitting wireless signals includes mapping data to generate a quadrature amplitude modulation (QAM) signal in a delay Doppler domain, determining a perturbation signal to minimize expected interference and noise, perturbing the QAM signal with the perturbation signal, thereby producing a perturbed signal, generating a pre-coded signal by pre-coding, using a linear pre-coder, the perturbed signal, and transmitting the pre-coded signal using an orthogonal time frequency space modulation signal scheme.

Abstract: An intelligent beamforming method and apparatus are disclosed. The intelligent beamforming apparatus may acquire information about a beamforming environment around a plurality of antennas, feed beamforming configuration information into a pre-trained beamforming configuration model, acquire optimal beamforming configuration information for the plurality of antennas as outputs from the beamforming configuration model, and configure beamforming for the plurality of antennas based on the optimal beamforming configuration information. Therefore, when there is a deviation in direction from the linearity of beams in an actual-use environment, it is possible to identify information about the surrounding environment and provide beamforming customized for the environment.

Abstract: A technique for performing data modulation is described. As to a method aspect of the technique, n bits of data are mapped to one modulation symbol (502) out of a modulation alphabet comprising 2n modulation symbols (502). The modulation alphabet corresponds to a finite subset of a hexagonal lattice in a constellation plane (500) spanned by an in-phase value (506) and a quadrature value (508) of a signal. All modulation symbols (502) are spaced apart in the constellation plane (500) from a direct current, DC, component corresponding to zero in-phase value and zero quadrature value. The signal corresponding to the mapped modulation symbol (502) is output.

Abstract: The present invention relates to a CSI extraction method in a MIMO receiver used in a wireless communication system, the method including: obtaining an effective channel matrix by matrix multiplication of a precoding matrix and a channel estimation value obtained through a CSI-RS; calculating an upper and a lower bound of a minimum distance for each layer through QR decomposition for the effective channel matrix; and mapping the upper and the lower bound of the minimum distance for each layer to each codeword, and extracting a mean mutual information per bit (MMIB) metric that is a transmission capacity per unit frequency for each codeword. According to the present invention, QR decomposition and a MMIB metric are used to obtain the minimum distance for each layer without a multidimensional search process, whereby the CSI is extracted with fewer operations than the conventional method when the MIMO transmission order is high.

Abstract: A hopping spread-spectrum wireless network for IoT applications operating in a predetermined frequency band, with mobile device that have unsynchronized local frequency references and receiving gateways that are capable of detecting whether modulated radio signals will collide in frequency in a collision time interval, and blanking the signals in the collision time. Preferably, the frequency band is subdivided into a sub-bands, and the mobile devices adapt the width of the sub-bands used for transmission based on a synchronization status indicative of the frequency error of the local frequency reference.

Abstract: A method and system for providing sub-band whitening are herein provided. According to one embodiment, a method estimating an interference whitening (IW) factor based on a legacy-long training field (LLTF) signal, updating the estimated IW factor during transmission of a data symbol, and scaling the data symbol based on the updated IW factor and the estimated IW factor.

Abstract: A method of a base station (BS) in a wireless communication system is provided, The method comprises: receiving, from a user equipment (UE), a 1st layer sounding reference signal (SRS); arranging the 1st layer SRS based on two antenna polarizations of an antenna system of the BS; identifying a dominant direction of a channel based on the 1st layer SRS; identifying a coefficient between two antenna polarizations based on the 1st layer SRS; constructing a 2-layer channel matrix based on the identified dominant direction and the identified coefficient; and transmitting, to the UE, a downlink signal via the antenna system based on the constructed 2-layer channel matrix.

Abstract: A digital-to-analog converter (DAC) and a method for operating the DAC are disclosed. The DAC receives, over a first channel, a control signal that is transmitted in accordance with a binary protocol. The DAC also receives, over a second channel different than the first channel, data that is transmitted in accordance with a multilevel communication protocol that is different than the binary protocol. The DAC determines a plurality of first and second voltages based on the received data and identifies, based on the control signal, a time when data transmission or reception is switched between first and second antennas. In response to identifying, based on the control signal, the time when data transmission or reception is switched, the DAC outputs the determined plurality of first voltages to a first antenna tuning circuit or the determined plurality of second voltages to a second antenna tuning circuit.

Abstract: A base station for transmitting and receiving signals in a wireless communication system is provided. The base station includes a transceiver, and at least one processor configured to obtain reception antenna weights for the base station including an array of a plurality of antennas, and transmission antenna weights for at least one user equipment (UE), convert signals received from the at least one UE through a plurality of reception paths, into beam-domain signals, based on the transmission antenna weights and the reception antenna weights, combine the converted beam-domain signals by applying predefined combining weights to the converted beam-domain signals, and obtain data from the combined signals.

Abstract: Systems and methods for maintaining synchronization of repeater networks with Global Positioning System (GPS) signals using phase locked loops (PLLs) and based on generation of predicted control words for controlling local oscillator frequencies is described. The predicted control words can be generated based on performing a linear fit of control words generated over a predetermined duration of time. Phase locked loops with additional false GPS pulse identification and GPS signal loss compensation circuitry can enforce a false pulse count threshold and/or an error threshold. The additional circuitry and prediction of control words can overcome errors in GPS receiver outputs and maintain accuracy of signal timings across single frequency networks using inexpensive local oscillators.

Abstract: A position detection system includes a GNSS sensor terminal that receives a satellite signal from a GNSS satellite as a snapshot, at least one relay device that receives the snapshot GNSS signal transmitted by the GNSS sensor terminal, and a calculation device that measures a position of the GNSS sensor terminal by using a code phase and a Doppler frequency of the GNSS satellite obtained from the snapshot GNSS signal, wherein the calculation device estimates an initial position of the GNSS sensor terminal by using position information of the relay device that has received the snapshot GNSS signal transmitted by the GNSS sensor terminal.

Abstract: A split radio access network is provided that efficiently transmits beamforming coefficients from a distributed baseband unit device to a remote radio unit device to facilitate beamforming at the remote radio unit. The beamforming coefficients can be determined at the baseband unit device and transmitted along with the data to be beamformed by the remote radio unit device. Due to the large number of antenna ports however, there can still be a very large number of coefficients to transmit, and the disclosure provides for a compressed set of coefficients that reduces the overhead signaling requirements. Instead of sending coefficients for every kth antenna port, the system can select a subset of the coefficients corresponding to a set of k antenna ports which can be used by the remote radio unit to approximate the full set of beamforming coefficients.

Abstract: In the conventional semiconductor device, the power consumed in ternary serial data communication cannot be reduced. According to one embodiment, the semiconductor device has a the transmission processing circuit 10 that converts the binary representation of binary Transmitted data Dbin_TX to a ternary transmitted data Dter_TX represented as a ternary number and generates a transmitted signal corresponding to this ternary Transmitted data Dter_TX, wherein the transmission processing circuit 10 verifies the frequency of occurrence of the values included in the ternary transmitted data Dter_TX, assigns the signal change pattern with the highest state transition to the transmitted signal logical level corresponding to the lowest occurrence value, and generates a transmitted signal.

Abstract: Flexibly configured containers consisting of resources within time-frequency blocks may be used to support multiple numerologies in new radio architectures. Uplink control may be defined in resources within a container, or in dedicated resources, by various nodes. Sounding reference signal resources may be dynamically configured for each numerology. The sequence length may be adapted, as well as the time domain location of symbols. Time, frequency, and orthogonal resources may be allocated via a downlink control channel or a radio resource control. Sounding reference signals may be pre-coded, and pre-coding weights may be based on a codebook or non-codebook approaches, e.g., via a radio resource control or a downlink RRC or DL control channel. Pre-coded sounding reference signals may be adapted to user equipment antenna configuration. Further, NR-SRS may be used as UL demodulation RS (DM-RS).

Abstract: An unregistered cable modem is in a cable operator network having a computer, a dynamic host configuration protocol (DHCP) server, a spoofing domain name system (DNS) server and a good DNS server, a captive portal application, and a trivial file transfer protocol (TFTP) server. The cable modem is provisioned by the cable modem obtaining a configuration, rebooting, and activating the configuration. The computer obtains a plurality of computer configuration parameters including an IP address of the spoofing DNS. The spoofing DNS server answers an HTTP request from the computer with an IP address associated with the captive portal application. The captive portal obtains an activation code from the computer, verifies the activation code is correct, and forces the cable modem to reboot.

Abstract: A first clock signal is generated from a reference clock signal. A first frequency associated with the first clock signal is less than a reference clock frequency associated with the reference clock signal. The first clock signal is propagated towards a first component of an integrated circuit through a clock tree. A second clock signal having a second frequency is generated from the first clock signal at a terminal point of the clock tree. The second clock signal is provided to the first component.

Abstract: The present disclosure relates to a communication technique which combines IoT technology with a 5G communication system for supporting a higher data transfer rate than existing 4G systems, and a system thereof. The present disclosure can be applied to an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or a connected car, and services related to health care, digital education, retail business, security and safety, etc.) on the basis of 5G communication technology and IoT-related technology.