Abstract: The invention relates to transmitting symbols in a MIMO wireless communication system, said method comprising: determining a p value; applying to a first block of M data symbols X=(X0, . . . XM-1) a pre-coder to obtain a second block of M symbols Y=(Y0, . . . YM-1) with Formula (I); applying a M size DFT then a N size IDFT to the first block of M symbols to obtain a first SC-FDMA symbol, said first SC-FDMA symbol being of a given duration; applying a M size DFT then a N size IDFT to the second block of M symbols to obtain a second SC-FDMA symbol, said second SC-FDMA symbol being of the given duration; transmitting during a time interval of the given duration, simultaneously the first and second SC-FDMA symbols, into the radio signal.

Abstract: Systems, apparatuses, and methods are described for wireless communications. A wireless device may distribute power for various transmission types based on a priority, which may be received from a base station.

Abstract: Various embodiments of the present technology comprise a method and apparatus for a continuous time linear equalizer (CTLE). In various embodiments, the CTLE comprises a cross-coupled transistor pair that operates as a negative impedance converter. The CTLE produces a transfer function that provides high gain peaking at a high frequency without increasing the size of the die area and/or the power supply level.

Abstract: A device including an equalizer that includes a first input configured to receive an input signal, a second input configured to receive a reference signal, and a third input configured to receive an adjustment signal. The equalizer also includes a first output configured to transmit a corrected signal, wherein the corrected signal is generated based on data outputs controlled via the input signal, the reference signal, and a clock signal, wherein the data outputs are modified based on the first adjustment signal, wherein corrected signal offsets inter-symbol interference on the input signal based on a data bit received at the first input prior to reception of the input signal.

Abstract: Encoders and decoders for encoding and decoding data according to a coding scheme. The encoder converts N bits of input data into M voltage signals for transmission over M parallel wires to a decoder having one or two decoding stages that recover the N bits of data from the M voltage signals. The coding scheme is an N-bit, M-wire PAM-Q code in which each voltage signal wi has one of Q voltage levels l1-lQ, where l1<l2< . . . <lQ, and the different sets of M voltage signals for the different N-bit input values are permutations of a single set of M voltage signals. The decoder has a comparator stage. For the decoder having one other decoding stage, the other decoding stage is a computation stage or a logic stage that is before or after the comparator stage.

Abstract: A powered communication device (31) comprises: a configurable resistor unit (35) coupled to the LAN port and adapted to generate a classification signal designating a power class of the powered communication device to be detected by the LAN switch, and a power module comprising a power converter (38) adapted to supply power to the electronic control unit (40) and to the peripherals in response to receiving power from the LAN port, wherein the electronic control unit (40) is configured to determine a power requirement of the communication device, detect a current resistance state of the configurable resistor unit (35) and, in response to detecting that the power requirement overshoots a power class associated to the current resistance state of the configurable resistor unit: reconfigure the configurable resistor unit (35) to designate a higher power class and, actuate the power switch (37) to transitorily put the LAN port (33) in a low-current state to be detected by the LAN switch.

Abstract: A method and apparatus for processing or generating a high-frequency signal using parallel and undersampled baseband signal processing in the frequency domain.

Abstract: The disclosure pertains to using ultra-wideband (UWB) radio communications to execute a pedestrian-vehicle rendezvous. In one example operation, a personal device such as a smartphone, is used to identify a location of a vehicle with a first level of accuracy. For example, the smartphone may be used by a pedestrian to obtain GPS location coordinates of a ride-hail vehicle summoned by the pedestrian. The vehicle may be located relatively far from the pedestrian. The smartphone may be configured to automatically establish a UWB radio link with a UWB transponder in the vehicle and/or a smartphone carried by a driver of the ride-hail vehicle, when the vehicle is within range to establish UWB communications. The UWB radio link may be used to execute one or more of various procedures to locate the vehicle with a second level of accuracy that is higher than the first level of accuracy.

Abstract: A transmission device that performs multiple-input multiple-output (MIMO) transmission of transmit data using a plurality of fundamental bands. The transmission device includes an error correction coding unit, a mapping unit, and a MIMO coding unit. The error correction coding unit, for each data block of predefined length, performs error correction coding and thereby generates an error correction coded frame. The mapping unit maps each predefined number of bits in the error correction coded frame to a corresponding symbol and thereby generates an error correction coded block. The MIMO coding unit performs MIMO coding with respect to the error correction coded block. Components of data included in the error correction coded block are allocated to at least two of the fundamental bands and transmitted.

Abstract: Aspects of the subject disclosure may include, for example, a transmission device that includes a first coupler that guides a first electromagnetic wave to a first junction to form a second electromagnetic wave that is guided to propagate along the outer surface of the transmission medium via one or more guided-wave modes. These mode(s) have an envelope that varies as a function of angular deviation and/or longitudinal displacement. Other embodiments are disclosed.

Abstract: The present disclosure provides a non-linear receiver, an asymmetric decision feedback equalization circuit and method, including: converting an optical signal emitted by a laser device into an electrical signal; obtaining a compensation amplitude of a current data in the electrical signal by obtaining an actual amplitude of the current data, and compensating the current data based on a logic value of k prior data of the current data and a feedback coefficient corresponding to the prior data; comparing the compensation amplitude of the current data with a decision threshold to determine the logic value of the current data; the feedback coefficient is an absolute value of an influence amount of the prior data on an amplitude of the current data, and k is a positive integer. The present disclosure can overcome the bit error problem of the receiver and reduce jitter of the clock recovered by the clock recovery circuit.

Abstract: A wireless data transmission technique includes encoding information bits as a periodic sequence of quadrature amplitude modulation (QAM) symbols, convolving the periodic sequence with a periodic pulse function, thereby generating a filtered periodic sequence, transforming the filtered periodic sequence to a delay-Doppler domain waveform, converting the delay-Doppler domain waveform to a time domain waveform, and transmitting the time domain waveform.

Abstract: A powerline data transmission system for smart shelves provides AC power and network data propagated over a single cable. In disclosed embodiments, a starter unit encodes an ethernet signal onto an alternating current power source with a driver unit decoding the ethernet signal from the power source to provide separate power and data at a location such as a shelving unit bay. The separated power and data signals are provided to a technology box which communicates power and data to sensors positioned on the shelves of the unit. A support structure for the smart shelf system provided mounting of the driver unit and technology box along the top of the shelving unit or in a lower tray of the unit.

Abstract: A high-frequency signal stimulator system has at least two mutually independent data producers, signal processing and a signal generator. The at least two mutually independent data producers are each configured to produce at least one data packet describing a high-frequency signal to be produced. The signal processing is configured to extract a signal of the data packet produced by the first of the at least two mutually independent data producers and contents of the data packet produced by the second of the at least two mutually independent data producers. The signal generator is configured to produce a high-frequency signal based on the extracted contents.

Abstract: A system and method for frame structure compliant adaptive extensionless windowing that maximizes fair proportional network capacity in the download. Gains are provided by emulating the multipath multiple access channel to the base station to calculate almost-optimum transmitter windowing durations prior to transmission and using the variance of received symbols using different window durations to allow the user equipment nodes to estimate optimal receiver windowing durations without calculations requiring further knowledge about the network.

Abstract: Embodiments of the present invention provide a data transmitter for transmitting a radio signal, the data transmitter being configured to modify a standard-based radio signal in order to transmit a modified radio signal, the amplitude of which, in a frequency band, additionally has a bit sequence.

Abstract: A memory interface may include a transmitter that generates multi-level signals. The transmitter may employ channel equalization to improve the quality and robustness of the multi-level signals. The channel equalization may be controlled independently from the drive strength of the multi-level signals. For example, a first control signal may control the de-emphasis or pre-emphasis applied to a multi-level signal and a second control signal may control the drive strength of the multi-level signal. The first control signal may control a channel equalization driver circuit and the second control signal may control a driver circuit.

Abstract: The frame preamble in current wireless systems is designed to facilitate various PHY-layer functions, including frequency offset estimation and frame detection. However, this preamble is assumed to be constant and is seldom used to convey any frame-specific bits. Embedding information into the preamble can open the door for new PHY-layer applications. P-modulation, a method that enables an OFDM-based wireless transmitter to embed frame-specific bits into the frame preamble to accomplish PHY-layer applications (while remaining backward-compatible with legacy receivers), is presented.

Abstract: A mobile electronic device includes a plurality of radio frequency (RF) antennas and a processor. RF antennas are configured to transmit (TX) or receive (RX) a RF signal. The processor is configured to configure one RF antenna, among the plurality of RF antenna, as a TX antenna and remaining RF antennas as RX antennas, cause the TX antenna to transmit the RF signal, cause the RX antennas to receive portions of the RF signal, the portions reflected from an object, calculate each of flight times of the RF signal with respect to each of the RX antennas, and identify a location of the object based on each of flight times of the RF signal, wherein each of the plurality of RF antennas is reconfigurable as the TX antenna or the RX antennas. A method for operating a mobile device is also provided.

Abstract: A receiver for detecting and recovering payload data from a received signal comprises a radio frequency demodulation circuit, a detector circuit and a demodulator circuit. The radio frequency demodulation circuit detects the received signal. The received signal carries the payload data as OFDM symbols in one or more of a plurality of time divided frames, each frame including a bootstrap signal, a preamble signal and a plurality of sub-frames. The demodulator circuit detects bootstrap OFDM symbols to identify communications parameters for detecting the fixed length signalling data, detects the fixed length signalling data to identify the communications parameters for detecting the variable length signalling data, detects the variable length signalling data, and uses the fixed and variable length signalling data to detect the payload data.