Abstract: Embodiments of a channel state information (CSI) reporting method and apparatus are disclosed. A method includes: receiving, by a first communications apparatus, reference signals from a second communications apparatus; and performing, by the first communications apparatus, channel measurement based on the reference signals, and sending first CSI to the second communications apparatus in a time unit whose identifier is m, where the first CSI is used to indicate a channel state in a first reference time unit and a channel state in a second reference time unit, where an identifier of the first reference time unit is m?n1, an identifier of the second reference time unit is m?n1?n2, where m, n1, and n2 are integers, and n2 is not equal to 0. This way, matching is improved between CSI applied by a network device and a channel that is at a current moment.

Abstract: A method performed by a RRU of a distributed base station system, which further comprising a BBU, connected to the RRU. The RRU is arranged to wirelessly communicate with at least one UE. The method comprises determining a downlink channel estimate from received uplink signals and determining a first part of precoding coefficients to be used for precoding signals to be sent downlink to the at least one UE based on the determined downlink channel estimate. The method further comprises receiving a second part of the precoding coefficients from the BBU, precoding downlink signals of data received from the BBU using the first and the second part of the precoding coefficients and sending the precoded downlink signals to the at least one UE via the plurality of antennas.

Abstract: This disclosure provides methods, devices and systems for encoding data for wireless communication to achieve probabilistic amplitude shaping. In some implementations, a transmitting device may achieve a fixed information block length (N), at least in part, by iteratively encoding the information bits until the number of amplitude-shaped bits combined with the number of unshaped bits is greater than or equal to a maximum payload length. For example, the maximum payload length may be equal to N. If the resulting number of amplitude-shaped bits plus the number of unshaped bits is less than N, the transmitting device may add one or more padding bits to the information block to achieve the fixed information block length.

Abstract: A method of communicating information from a sensor concerning a received signal, comprising: responsive to receiving by at least one detecting sensor, during a defined time interval, data indicative of an entire data of a frequency band received by it during the defined time interval, comprising at least one signal emitted at least one emitter, and to detecting of the emitted signal by the at least one detecting sensor, sending from the sensor assistance information corresponding to the detected emitted signal during the defined time interval, to at least one non-detecting sensor. This information can be utilized by the non-detecting sensor to perform an action with respect to data indicative of an entire data of the frequency band received by the non-detecting sensor during a corresponding defined time interval, the action corresponding to at least one emitted signal received by the non-detecting sensor during the corresponding defined time interval.

Abstract: A beam transmitting device improves performance of a communication channel. The beam transmitting device includes a controller configured to transmit a null data packet (NDP) and receive channel information; and a smoothing circuit configured to smooth a plurality of beamforming vectors in the channel information. The smoothing circuit includes a weight calculator configured to calculate a common phase factor using two adjacent beamforming vectors among the plurality of beamforming vectors, and a moving average filter configured to perform the smoothing using the common phase factor.

Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for generating and encoding bits of CSI report. In some cases, a UE may determine a payload size for channel state information (CSI) reporting based, at least in part, on a supported rank, calculate a packet length for the CSI reporting based on the determined payload size, and encode the CSI for a selected CSI resource index (CRI), based on the payload size and the calculated packet length, to generate a coded packet.

Abstract: Examples relate to a cable modem, to an apparatus, device and method for a cable modem, and to an apparatus, device and method for a cable communication system. The apparatus or device for the cable modem comprises interface circuitry/communication means for communicating with transceiver circuitry/transceiving means of the cable modem, and processing circuitry/processing means. The processing circuitry/means is configured to determine information on a power level of received transmissions at a plurality of points in time in a plurality of frequency bands of an upstream spectrum via the transceiver circuitry, to determine, for each of the plurality of frequency bands, numeric information on an occurrence of one or more power levels of the received transmissions in the respective frequency band, and aggregate the numeric information on the occurrence of the one or more power levels of the received transmissions by frequency band.

Abstract: Methods, systems, and storage media are described for the indication of frequency hopping and downlink (DL)/uplink (UL) configuration in narrowband Internet-of-Things (NB-IoT) systems. Other embodiments may be described and/or claimed.

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, wireless devices may encode and decode transmissions using polar codes. A transmitting device may encode a payload based on a selected payload size. For example, the transmitting device may construct a bit vector including payload bits, parity bits, frozen bits, or some combination of these, and may modify the bits or the order of the bits based on the selected payload size. The device may generate a polar-encoded codeword based on this bit vector, and may transmit the polar-encoded codeword to a receiving device. The receiving device may blind decode the polar-encoded codeword, and may determine the correct payload size based on the decoded bit vector. For example, the device may perform decoding or may check decoded bits based on a payload size hypothesis, where the decoding may fail for any incorrect payload size hypothesis.

Abstract: A time synchronization method and a device, where the method includes generating, by a first device, a first time synchronization frame according to a first coding scheme, where the first time synchronization frame includes a first frame header and a first time of day (TOD), the first frame header carries an identifier of the first coding scheme, and the first coding scheme defines a boundary of the first time synchronization frame and a location of the first TOD in the first time synchronization frame, and sending, by the first device, the first time synchronization frame to a second device using a first single line to trigger the second device to identify the first time synchronization frame according to the identifier of the first coding scheme, to obtain the first TOD from the first time synchronization frame, and to trace a time of the first device according to the first TOD.

Abstract: Provided are methods and systems for terrestrial data transmission between aircrafts and external networks, such as airline and/or airport computer systems. When an aircraft is parked at the gate, the aircraft is connected to and powered by an electrical cable, such as a stinger cable. This cable may be also be used for wired data transmission between the aircraft and the gate using broadband over power line (BPL) technology. The gate and the aircraft are each equipped with a BPL module. The aircraft may include other communication modules, such as a Wi-Fi module, a cellular module, and/or an Ethernet module. These other modules can be also used for data transmission in addition to or instead of communication through the BPL module. A communication link manager may be used to select one or more communication modules depending on availability of communication links, costs, speed, and other parameters.

Abstract: A semiconductor integrated circuit includes a first circuit configured to carry out digital-to-analog conversion on input data; a high-pass filter configured to reduce a component, the component having a frequency lower than a predetermined cutoff frequency, in delayed input data obtained by delaying the input data, and output the delayed input data; a second circuit configured to carryout the digital-to-analog conversion on the delayed input data that passes through the high-pass filter; and a third circuit configured to drive a transmission signal, the transmission signal based on an addition signal obtained by adding an output signal of the first circuit and an output signal of the second circuit.

Abstract: An operation method of a first communication node in a communication system includes receiving a signal from a second communication node; demodulating the signal to obtain LLR values; calculating a first codeword based on the LLR values; selecting error patterns from among all error patterns based on Hamming weights; generating second codewords by applying the first codeword to each of the selected error patterns; and determining a codeword having a highest similarity to the first codeword among the second codewords as an optimal codeword.

Abstract: An electrical meter (M) installed at a facility (F) supplied electrical power by a utility's (U) electrical distribution system (EDS) utilizes a two-way automatic communications system (TWACS) for receiving messages from the utility sent over the electrical distribution system using the TWACS. An improvement to the meter comprises reconfiguring existing components installed in the meter to function as an analog-to-digital (ADC) converter so to facilitate processing of powerline waveforms (WF) propagated through the electrical distribution system by application of a signal based detection algorithm. This improves detection of signal elements comprising a message sent via the TWACS and by other means and incorporated in the electrical waveforms thereby reducing occurrence of a false synchronization with the message elements so a content of a message is readily ascertained by the meter.

Abstract: A method and a communication device adapted for designing a hybrid beamforming (HB) precoding used in a mobile communication system with an antenna array, the method including aggregating spatial channel vectors received by the antenna array; performing a linear factorization of the aggregation; truncating the linear factorization to generate truncated channels; and designing the HB precoding based on the truncated channels. wherein the HB precoding includes a linearly generated analog beamforming component and a linearly generated digital beamforming component.

Abstract: A patient monitor that acquires a vital sign through a measurement sensor, and that is to be connected to an external measurement apparatus for measuring another vital sign, includes a master clock that is disposed in the patient monitor, and that manages common time information, a first operating system that manages first time information, and a second operating system that manages second time information, and that transmits and receives data to and from the external measurement apparatus. When a predetermined event occurs, the first operating system reads the common time information from the master clock, and updates the first time information. When the predetermined event occurs, the second operating system reads the common time information from the master clock, updates the second time information, and notifies the external measurement apparatus of the updated second time information or the common time information.

Abstract: A time-frequency block-sparse channel estimation method based on compressed sensing includes the following steps. Step 1: A channel model is established. Step 2: According to the channel model obtained in Step 1, a sparse signal estimation value is solved by a compressed sensing method to further calculate an index set. Step 3: According to the index set obtained in Step 2, a channel matrix estimation value is solved. The method provides a generalized block adaptive gBAMP algorithm, which uses time-frequency joint block sparsity of a massive MIMO system to further optimize selection of an index set in an algorithm iteration process to improve stability of the algorithm. Then, without a specified threshold parameter, based on an F norm, an adaptive iteration stop condition is determined based on a residual, and the validity of the method is proved.

Abstract: To reduce signal distortion, a remote terminal receives a quadrature-modulated transmitter-check signal from a user terminal. The remote terminal measures an in-phase/quadrature (I/Q) imbalance error and/or a direct current (DC) offset error in the transmitter-check signal. The remote terminal then transmits to the user terminal transmitter-correction information derived from an I/Q imbalance error or a DC offset error. The transmitter-correction information is for counteracting the I/Q imbalance error or the DC offset error at the user terminal.

Abstract: A communication system includes a digital data processor that produces a digital data sample and one or more control bits. A serialized transmit interface combines the digital data sample and the control bit(s) into one or more data packets and sends the data packet(s) over a signal line. A serialized receive interface receives the transmitted data packet(s) from the signal line and produces a reconstructed digital data sample and the control bit(s) from the transmitted data packet(s). A control circuit coupled to the serialized receive interface produces a control signal from the control bit(s). The communication system may include a converter circuit, which produces an RF input signal by performing a digital-to-analog conversion of the reconstructed digital data sample, and by upconverting the resulting analog data sample signal to RF. A power amplifier amplifies the RF input signal and modifies operation of a sub-circuit based on the control signal.

Abstract: In a mobile communication system using a mobile-type radio relay apparatus that forms a plurality of cells toward the ground or the sea while moving in an upper airspace, a deterioration in communication quality, which is caused by a Doppler shift of a reception signal due to a relative movement of a radio relay apparatus with respect to a terminal apparatus of each of a plurality of cells or a feeder station on the ground or on the sea, is suppressed. The communication system comprises a mobile-type radio relay apparatus that is disposed movably by flying in an upper airspace, forms a plurality of cells from an antenna at a predetermined altitude toward the ground or the sea, and performs a radio communication with a terminal apparatus located in each of the plurality of cells.