Abstract: An apparatus and method for providing a protocol stack design which resists active jammers. The apparatus including a transmitter component, the transmitter component including: a rate-2 orthogonal space-time block code (OSTBC) encoder for processing a set of information symbols to produce a set of encoded signals; a precoder module coupled to an output of the rate-2 OSTBC encoder for modifying a signal-to-jammer plus noise ratio (SJNR) of the set of encoded signals; and an eigen-beamformer module coupled to an output of the precoder module, and configured to generate a set of symbols for transmission via a set of eigenmodes of a channel covariance matrix for the transceiver.

Abstract: Disclosed are a communication scheme and a system thereof for converging an IoT technology and a 5G communication system for supporting a high data transmission rate beyond that of a 4G system. The disclosure can be applied to intelligent services (for example, services related to a smart home, smart building, smart city, smart car, connected car, health care, digital education, retail business, security, and safety) based on 5G communication technology and IoT-related technology. Disclosed is a method of a user equipment (UE) in a wireless communication system. The method includes: receiving a message including secondary cell (SCell) configuration information from a base station; identifying whether a condition for transitioning the SCell to a dormant state is satisfied; and in case that the condition for transitioning the SCell to the dormant state is satisfied, releasing periodic transmission resources for the SCell configured in the UE.

Abstract: Channel state information (CSI) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (PMI) feedback, wherein the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook. In one embodiment, the first codebook comprises at least a first precoding matrix constructed with a first group of adjacent Discrete-Fourier-Transform (DFT) vectors. In another embodiment, the first codebook comprises at least a second precoding matrix constructed with a second group of uniformly distributed non-adjacent DFT vectors.

Abstract: There is disclosed a method and system for determining an occurrence of a visit to a venue by a user associated with an electronic device. The method comprises, at a training phase: receiving a SSID; receiving one or more venue identifiers; generating a positive pair; generating a set of negative pairs; wherein the positive pair and the set of negative pairs form a set of training data; training a machine learning algorithm by determining a set of features representative of a property of the set of training data; and generating an inferred function, the inferred function being configured to determine a confidence parameter of a given pair including a given SSID received from the electronic device paired to a given venue identifier, the confidence parameter representing a probability of an occurrence of a visit by the user to the venue associated with the given venue identifier.

Abstract: The controller includes a first equalizer, a first detector, a second detector, a multiplexer, a data clock generator, and a second equalizer. The first equalizer is configured to receive and equalize the input data. The first detector is configured to detect optimum phase of the input data. The optimum phase of the input data represents the input data peak. The second detector is configured to generate an envelope data according to the input data and detect peak of envelop with respect to sampling phase. The data clock generator is configured to generate the recovered data clock. The second equalizer is configured to generate the recovered data. The multiplexer is configured to generate an offset value according to the input data peak and the envelope data peak. The offset value represents the recovered data clock having an optimum sampling frequency and an optimum sampling phase.

Abstract: In a wireless communication network, a primary access node wirelessly serves User Equipment (UEs) over a primary radio channel. A secondary access node wirelessly serves the UEs over a secondary radio channel. The primary access node determines uplink interference. The primary access node processes the uplink interference to select a new primary radio channel size and a new secondary radio channel size. The primary access node wirelessly serves the UEs over the primary radio channel having the new primary channel size. The secondary access node wirelessly serves the UEs over the secondary radio channel having the new secondary channel size.

Abstract: An information processing apparatus is provided with a controller comprising at least one processor. The controller is configured to execute: displaying presentation information to be presented to a user of a vehicle at an inside or an outside of a window formed in a vehicle; switching over between displaying and non-displaying of the presentation information displayed at the inside of the window according to an instruction received from the user; and displaying the presentation information at the outside of the window in cases where the vehicle is located in a specific place.

Abstract: Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.

Abstract: Systems and methods are disclosed to detect cloud-to-ground (CG) strokes that include and/or are followed by continuing current (CC). For example, earth-based lightning data may be generated for one or more lightning pulses detected in an environmental space using multiple earth-based lightning detection sensors. Space-based lightning data may be received for one or more optical signals detected in the environmental space using one or more space-based lightning detection sensors. It may be determined from the earth-based and space-based lightning data whether a lightning pulse is a CG stroke that includes or is followed by CC. Charge transfer of a CG stroke with CC may be obtained from measurements of electromagnetic fields by an array of electromagnetic field sensors to generate training data. A machine learning model may be trained to relate space-based and/or earth-based lightning data to charge transfer where there is no proximate array of electromagnetic field sensors.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may receive a wireless communication signal. The wireless communication device may process the wireless communication signal using a digital post distortion receiver based at least in part on performing a multi-level coding (MLC) set partitioning operation, wherein performing the MLC set partitioning operation comprises partitioning a quadrature amplitude modulation constellation set by bounding a maximum Euclidean distance of an error associated with decoding one or more least significant bits. Numerous other aspects are provided.

Abstract: A transmitting device may identify a set of bit locations of a polar code for encoding an input vector based at least in part on a reliability order of the bit locations, where the input vector includes a set of payload bits. The transmitting device may map bits of the input vector to respective bit locations of the identified set of bit locations and may apply a masking operation to a subset of bits of the input vector that is mapped to a most reliable subset of the set of bit locations. The transmitting device may perform an encoding operation according to the mapped input vector to generate a codeword for transmission. A receiving device may perform complementary operations to obtain the payload bits of the input vector. Based on the described techniques, a false alarm rate for the receiving device may be suppressed.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may determine a signal distortion based at least in part on a number of analog-to-digital conversion (ADC) bits used for signal quantization at a user equipment (UE). The base station may remap a tone reservation and data based at least in part on the signal distortion. The base station may transmit, to the UE, a remapped tone reservation and remapped data. Numerous other aspects are provided.

Abstract: The disclosed embodiments provide a system that implements a low-aperture-delay sampler. The system includes a sampler input, which receives an input signal, and a clock input, which receives a clock signal. The system also includes: a first sampling channel, which samples the input signal when the clock signal is low and is associated with a previous clock phase; and a second sampling channel, which samples the input signal when a rising edge is received in the clock signal, wherein the rising edge is associated with a present clock phase. The system additionally includes a combining mechanism, which combines outputs of the first and second sampling channels to produce a sampler output with a significantly reduced aperture delay.

Abstract: In one embodiment, a movement footprint of a user walking along a wall in the environment is determined at least in part based on a communication between a first communication device and a second communication device. The first communication device is carried by the user, and the second communication device is placed in the environment. A representation of the spatial division of the environment is generated based on the determined movement footprint. An estimated size associated with at least one reference object in the environment is determined according to the representation of the spatial division, and a reference size associated with the at least one reference object is obtained. Further, the representation of the spatial division is adjusted based on the estimated size and the reference size.

Abstract: A wireless communication device (UE) may provide information pertaining to one or more operating capabilities of the UE to LTE and 5G-NR networks. The UE may transmit information to an LTE base station directly, and to a 5G-NR base station directly, or indirectly via the LTE base station. The information may include preferred values corresponding to any number of different operating parameters associated with wireless communications or wireless communication capabilities of the UE in both LTE and 5G-NR networks, to inform and/or request the LTE and 5G-NR networks to make provisions based on the transmitted information for the wireless communications of the UE on those networks. The UE may thereby provide assistance information to LTE and 5G-NR networks in a multi-radio-access-technology dual-connectivity setting to request the respective networks to adjust certain operating capabilities of the UE in order to alleviate one or more operating issues that may be affecting the UE.

Abstract: A system and method for data sampler drift compensation in a SerDes receiver. Off-data values are received at a drift compensation engine from a plurality of data value selectors coupled to one of a plurality of data sampler pairs of a speculative Decision Feedback Equalizer (DFE) of a SerDes receiver. A drift compensation value for each of the data samplers is generated by the drift compensation engine based upon the off-data values received from each of the plurality of data value selectors and, a sampling level of each of the data samplers of the plurality of data sampler pairs of the DFE is adjusted based upon the drift compensation value from the drift compensation engine.

Abstract: A method for controlling radiation scattering, comprises: directing radiation to a metamaterial having an array of individually tunable and near field coupled resonators, varying an individual resonance frequency of at least one of the resonators to provide a collective resonance scattering of the radiation by the metamaterial, measuring a scattering signal of the collective resonance scattering of the radiation, and identifying the metamaterial based on the scattering signal.

Abstract: An alarm method and system reduces costs, and the alarm method includes obtaining a detection signal from a terminal device, where the detection signal is a signal sent by the terminal device when the terminal device detects whether there is an available network, and performing an alarm operation when the detection signal meets a first condition.

Abstract: Systems and methods include communicating emergency information relative to a structure and an individual associated with the structure. Embodiments of the present disclosure relate to a beacon that transmits emergency information to a communications device associated with the individual. The emergency information includes emergency status information that updates the individual as to a status of an emergency that the structure is enduring and/or emergency action information that provides recommended actions for the individual to execute to avoid harm caused by the emergency. A controller updates the emergency information that is transmitted by the beacon based on changes in the status information due to changes in the status of the emergency that the structure is enduring and/or changes in the emergency action information due to changes in the recommended actions that the individual is to execute based on changes in the status information of the emergency.

Abstract: A method for detecting whether a user's roaming has occurred is provided. The method may be performed by a roaming detection server and comprises receiving location data of the user from a terminal of the user, determining whether the user may be located indoors by using the location data of the user, and determining a use of a building in which the user may be located using use information of the building based on the user being located indoors, and detecting whether the user's roaming has occurred based on a predetermined condition, wherein it may be detected that the roaming has occurred based on the building in which the user may be located not being a building of a predetermined use.