Abstract: A transmitter includes a mapping circuit and a framing circuit. The mapping circuit is configured to combine and map a first data sequence and a second data sequence onto orthogonal frequency division multiplexing (OFDM) subcarriers which include first subcarriers and second subcarriers. The framing circuit is configured to generate an OFDM signal from the OFDM subcarriers. The mapping circuit is configured to: map first data included in the first data sequence and second data included in the second data sequence onto the first subcarriers; and map the second data onto the second subcarriers. The first data are not mapped on the second subcarriers.

Abstract: An apparatus is described. The apparatus includes a decision feedback equalizer circuit having a summation circuit. The summation circuit has a differential pair that includes first and second transistors coupled to a current source. The current source is to draw a current through the first and second transistors. The decision feedback circuit also includes a circuit to adjust the current to compensate for a change in electron mobility of at least one transistor of the current source.

Abstract: A beam refinement method and a communications device, where the method includes determining, by a first device, a format of an enhanced Beam Refinement Protocol (eBRP) packet, where the eBRP packet includes a training field, the training field includes an eBRP channel estimation (eBRP-CE) sub-field and an eBRP training (eBRP-TRN) sub-field, and a ratio of a quantity of Gray codes composing the eBRP-CE sub-field in the training field to a quantity of Gray codes composing the eBRP-TRN sub-field in the training field is less than 9:20, and sending, by the first device, the eBRP packet to a second device based on the determined format of the eBRP packet. Hence, an effective proportion of the eBRP-TRN sub-field in the training field can be increased such that more Antenna Weight Vector (AWV) configurations can be attempted within a same period of time.

Abstract: A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for receiving broadcast signals, the apparatus comprises a receiver to receive the broadcast signals, a demodulator to demodulate the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme, a frame parser to parse a signal frame from the demodulated broadcast signals, wherein the signal frame includes at least one service data, a time deinterleaver to time deinterleave each the service data, wherein the time deinterleaving is performed depending on a number of physical paths for each the service data, a damapper to demap the time deinterleaved data and a decoder to decode the demapped service data.

Abstract: A transmitter transmits payload data using Orthogonal Frequency Division Multiplexed (OFDM) symbols. The first OFDM symbol is a first type having a number of sub-carriers which is less than or equal to the number of sub-carriers of the one or more second OFDM symbols of a second type and a guard interval for the first OFDM symbol is selected in dependence upon the longest possible guard interval of the second OFDM symbol. Accordingly an OFDM communications system can be formed in which data is transmitted using a frame structure in which a guard interval is adapted to allow a mix of different types of OFDM symbols.

Abstract: A load drive system for driving a load supplied with power from a power line includes a control unit which controls switching between the power line and the load and a communication unit which communicates using voltage and current of the power line. When performing the switching, the control unit controls, based on a width of a transition period of the power-line current, the transition period being attributable to the switching, timing of the switching so as to move the transition period away from a center of a period corresponding to a symbol communicated by the communication unit.

Abstract: A method includes generating, via a processor, multiple initial vectors, each including N elements. A code map is applied to each of the initial vectors, to produce an associated spreading code vector. Each of the spreading code vectors includes M elements, where M?N. Using the spreading code vectors, spread signals are produced based on a complex baseband signals. The spread signals are stored in a memory operably coupled to the processor. The first and second spread signals are split into respective sets of spread signals, each uniquely associated with one of multiple transmit antennas. The first and second sets of spread signals are transmitted to respective signal receivers for detection of associated complex baseband signals based on the associated spreading code vectors.

Abstract: This disclosure provides a split-path equalizer and a clock recovery circuit. More particularly, clock recovery operation is enhanced, particularly at high-signaling rates, by separately equalizing each of a data path and an edge path. In specific embodiments, the data path is equalized in a manner that maximizes signal-to-noise ratio and the edge path is equalized in a manner that emphasizes symmetric edge response for a single unit interval and zero edge response for other unit intervals (e.g., irrespective of peak voltage margin). Such equalization tightens edge grouping and thus enhances clock recovery, while at the same time optimizing data-path sampling. Techniques are also disclosed for addressing split-path equalization-induced skew.

Abstract: A target constellation diagram determining method, a data sending method, and an apparatus are provided in accordance with the disclosure. The target constellation diagram determining method in accordance with the disclosure may include receiving, by a receiving device, training data that is generated and sent by a sending device based on each constellation point in an alternative constellation diagram. A detection region of each constellation point can then be determined based on a position of the training data in the alternative constellation diagram. A cumulative distance corresponding to the alternative constellation diagram can be obtained based on a distance between the detection regions of the constellation points.

Abstract: The embodiments of the present disclosure provide a method and a device for constraining a codebook subset. The method includes steps of: determining codebook subset constraint parameters for all or parts of matrix sets for constructing a codebook respectively, each codebook subset constraint parameter indicating an available matrix in a corresponding matrix set; and transmitting the determined codebook subset constraint parameters to a UE. The number of the matrices in each matrix set for constructing the codebook is far less than the number of precoding matrices in the codebook.

Abstract: A method and apparatus for transmitting data from a transmitter device to one or more receiver devices, each of the one or more receiver devices being connected to the transmitter device via a respective wire connection, the transmitter device being operable to transmit signals onto the wire connections over one or more different channels, the method comprising, for each of the one or more different channels: determining a value of a function S˜mj,j, dependent on an upper bound for a channel capacity of the one or more channels and a channel gain of the jth channel; determining a transmission power Smj,j, for transmitting data along that channel based on S˜mj,j; and transmitting, by the transmitter device, data over that channel to one or more of the receiver devices, the data being transmitted at the transmission power Smj,j determined for that channel.

Abstract: A wireless communication device according to some aspects includes an output determiner configured to determine first weighted signals for a plurality of antennas with first beamforming weights, a selector configured to select, from the plurality of antennas, a reference antenna based on signal powers of the first weighted signals, a weight controller configured to determine second beamforming weights for a predetermined number of antennas of the plurality of antennas based on a difference between the first weighted signal of the reference antenna and the first weighted signals of the predetermined number of antennas, the output determiner further configured to determine second weighted signals for the plurality of antennas with the second beamforming weights.

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: Embodiments are directed to a user equipment (UE) that performs MIMO communication on a plurality of Component Carriers (CCs) in accordance with a Carrier Aggregation (CA) scheme with each CC having an associated rank number that indicates a respective number of receive chains for the CC, selects at least one of the plurality of CCs for tuning away from the MIMO communication in order to perform an inter-frequency (IF) Positioning Reference Signal (PRS) measurement, selects, from among a plurality of receive chains allocated to the selected at least one CC, a subset of receive chains that includes less than all of the plurality of receive chains to be tuned away from the MIMO communication to perform the inter-frequency PRS measurement, and tunes the selected subset of receive chains of the selected at least one CC away from the MIMO communication to perform the inter-frequency PRS measurement.

Abstract: A vector distribution method for operation of a power amplifier of a wireless transmitter including receiving, by a first amplifier circuit, a first input vector and a second input vector. The first input vector includes data derived from an input signal of the wireless transmitter and the second input vector includes other data derived from the input signal of the wireless transmitter. The method includes, in response to receiving the input signal, instructing the first amplifier circuit to output an output signal at a high voltage.

Abstract: An apparatus and method are provided for processing a received input signal comprising a sequence of data blocks. Counter circuitry within the apparatus is arranged to receive a digital representation of the input signal, and for each data block generates a count value indicative of occurrences of a property of the digital representation (for example a rising edge or a falling edge) during an associated data block transmission period. Quantization circuitry then maps each count value to a soft decision value from amongst a predetermined set of soft decision values, where the number of soft decision values in the predetermined set exceeds a number of possible data values of the data block. The output circuitry then generates a digital output signal in dependence on the soft decision values.

Abstract: Aspects of the present disclosure are directed to facilitating communications to respective circuit nodes in a manner that may also be useful for mitigating undesirable signal attenuation. As may be implemented in accordance with one or more embodiments, switchable isolation circuits, presented by at least one transformer and switch, are utilized to isolate adjacent data processing nodes on a bus in which each data processing node includes logic circuitry and processes signal therein. For each of the switchable isolation circuits, switching circuitry operates to mitigate communication propagation over the differential bus between adjacent data processing nodes, by switching the switchable isolation circuit for providing isolation. This approach may be utilized, for example, to assign sequential identification to daisy-chained circuit nodes upon start-up or reset, for use in addressing each node directly for further communication therewith.

Abstract: A receiver and a program capable of, when they have received a pulse noise together with a reception signal, improving quality of the reception signal are provided. A receiver according to the present disclosure includes a received-signal amplification circuit configured to amplify a monitoring received signal branched from a received signal, a gain control circuit configured to set a gain setting value for an AGC operation in the received-signal amplification circuit, the AGC operation being an operation for making an amplitude of an amplified monitoring received signal fall within a predetermined range, a pulse detection circuit configured to monitor a change in the gain setting value and detect whether or not a pulse noise is contained in the received signal based on whether or not the change in the gain setting value meets a predetermined condition.

Abstract: A radio communication repeater for operating in a Time Division Multiple Access radio communication system with a plurality of time slots to transmit packets. The repeater includes a transmitter to transmit a plurality of the packets in a transmit time slot assigned to that repeater and a receiver to receive a plurality of the packets from all other time slots of the TDMA radio communication system other than the transmit time slot assigned to that repeater. The repeater also includes a controller to process the received packets from all other time slots of the TDMA radio communication system other than the transmit time slot assigned to that repeater and, if the received packets have different recipient identifiers, to forward the received packets for transmission by the transmitter in the transmit time slot assigned to that repeater as a frame comprising a plurality of packets having different recipient identifiers.

Abstract: Methods, systems, and devices for wireless communication are described. A transmitter, such as a user equipment and/or a base station, may perform polar coding to encode bits. The polar coding may be associated with a plurality of component channels associated with a polar code length. The transmitter may interleave the encoded bits. The transmitter may map the interleaved encoded bits to a modulation symbol. The interleaving and mapping of each encoded bit may be based on an asymmetry of a polar code construction. The transmitter may transmit the interleaved encoded bits based on the mapping.