Abstract: The embodiments described herein provide devices and methods to facilitate ripple control communication. Specifically, the embodiments provide devices and methods for decoding ripple control data from ripple signals, such as ripple signals that have been superimposed over power signals used to transmit power. These embodiments provide devices and methods that use band-pass filter, signal multiplier, fast and slow low-pass filters, and accumulate a difference between outputs of these slow and fast low-pass filters. This accumulated difference is then used to decode the ripple control data.

Abstract: Methods and apparatus for monitoring wideband GHz spectrum for wireless communication, and sensing and decoding respective frequency components of a time-varying signal corresponding to the monitored spectrum. Concepts relating to sparse Fast Fourier Transform (sFFT) techniques facilitate identification of one or more frequency components of a sparsely occupied spectrum by sub-sampling the signal corresponding to the monitored spectrum at a sampling rate below the Nyquist criterion. The disclosed methods and apparatus may be implemented using conventional relatively low-power wireless receivers and using off-the-shelf relatively inexpensive low-speed and low-power analog-to-digital converters (ADCs) typically employed in WiFi devices or cellular phones, in tandem with unique processing techniques based on sFFTs and sub-Nyquist criterion sampling, and have demonstrated efficacy even in scenarios where the monitored spectrum is not sparse.

Abstract: A method for controlling a power source semiconductor may include: supplying, by a switching frequency supply unit, preset respective reference switching frequencies to a plurality of elements which are operated according to a respective switching frequency; sensing, by a control unit, sensing interference in the plurality of elements, based on operations of the elements according to the respective reference switching frequencies; setting, by the control unit, bandwidths for the respective reference switching frequencies when the interference in the plurality of elements is sensed; and increasing, by a bandwidth adjusting unit, bandwidth of the respective reference switching frequencies supplied through the switching frequency supply unit, based on the bandwidths for the respective reference switching frequencies.

Abstract: A loop-powered transmitter includes a data isolation transformer including primary and secondary windings and an analog-to-digital converter (ADC) to convert a sensor signal to a digital value. The transmitter also includes a first microcontroller coupled between a multi-signal interface of the ADC and only one tap of the primary winding of the data isolation transformer, and a second microcontroller coupled to the secondary winding of the data isolation transformer. The first microcontroller is configured to receive the digital value from the ADC over the multi-signal interface and to provide data indicative of the digital value via a single output data line through the tap of the primary winding of the data isolation transformer to the second microcontroller. Unipolar voltage converters may also be included in the transmitter along with a current limiting resistor for the data isolation transformer to reduce the risk of saturating the data isolation transformer.

Abstract: Embodiments of the invention provide a method for discriminating between two types of encoding schemes for the frame control header (FCH) used in G3-type narrow band OFDM communications. The two modes for encoding are Differential with respect to the previous Symbol (DS) and Differential with respect to the Preamble (DP). This mode is sometimes referred to as “coherent” mode.

Abstract: Various embodiments of communication systems and methods in which the communication system is operative to find, record, and use sets of pre-distortion parameters in conjunction with a pre-distortion procedure, in which each set of pre-distortion parameters is operative to specifically counter distortions produced in a power amplifier by a specific combination of level of input signal power and level of analog gain associated with a transmission path of the communication system. In some embodiments, there is a modulator, a transmission chain, a distortion analysis mechanism, and a pre-distortion mechanism, operative to analyze and modify signals so as to counter signal distortion.

Abstract: A joint estimation and compensation method of RF imperfections in a LIE (Long Term Evolution) uplink system comprises steps: establishing a joint signal model with RF imperfections; according to the joint signal model, undertaking estimation and compensation of CFO, DC offset, multipath channel, IQ imbalance and shaping filter imbalance of a received signal; and using a frequency equalizer to equalize said received signal and determine modulation data. For reducing computational complexity, the present invention further converts the received signal from a time domain to a frequency domain to undertake frequency domain compensation. The present invention can indeed solve the problems of IQ imbalance, filter imbalance, DC offset, multipath channel and CFO and effectively estimate and compensate RF imperfections in the LTE uplink system.

Abstract: A base station, comprising a first antenna for transmitting a first pilot signal; a second antenna for transmitting a second a pilot signal; a third antenna for transmitting a third pilot signal; and a fourth antenna for transmitting a fourth pilot signal. The base station is configured to transmit pilot signal power information for indicating power values to a user equipment, UE, receiving the pilot signal power information. The pilot signal power information comprises: a first power value corresponding to the first pilot signal, a second power value corresponding to the second pilot signal, a third power value corresponding to the third pilot signal, and a fourth power value providing information regarding at least two demodulation pilot signals.

Abstract: A method decodes a block of data received over a communication channel. The method determines an initial estimate of bits in the block using a QR decomposition (QRD-M) method decoding the bits in the block sequentially by reducing an accumulated distance between the initial estimate and the bits of the block. Then, the method determines the block using a likelihood ascent (LAS) method that iteratively updates the bits of the block starting from the initial estimate.

Abstract: A wireless audio receiver system and method is provided that is capable of receiving one or more radio frequency (RF) signals containing audio signals modulated by analog and/or digital modulation schemes, operating in full diversity mode or switched diversity mode, demodulating the RF signals, and outputting analog audio signals and a combined digital audio signal. The system and method switches multiple diversity antennas to route received RF signals to respective RF signal processing paths. Digitized passband modulated signals are demodulated to generate analog audio signals, and a combined digital audio signal with one or multiple channels may also be generated. The system and method are capable of demodulating signals modulated using a wide variety of modulation schemes. Reconfigurable computing components are utilized to demodulate digitized passband modulated signals and generate the analog audio signals and combined digital audio signal.

Abstract: The present invention provides a cycle-slip detection method and apparatus, and a receiver. If an absolute value of a first difference obtained by subtracting a phase of a first symbol in a kth training sequence cycle from a phase of a last symbol in a (k?1)th training sequence cycle in a received signal is greater than a cycle-slip determining threshold, it is determined that a cycle-slip occurs in the kth or (k?1)th training sequence cycle. Further, if a second difference obtained by subtracting a phase of the first symbol in the (k+1)th training sequence cycle from a phase of the last symbol in the kth training sequence cycle is greater than the cycle-slip determining threshold, and signs of the first difference and the second difference are opposite, it is determined that a cycle-slip occurs in all symbols in the kth training cycle.

Abstract: Disclosed is a precoding method comprising the steps of: generating a first coded block and a second coded block with use of a predetermined error correction block coding scheme; generating a first precoded signal z1 and a second precoded signal z2 by performing a precoding process, which corresponds to a matrix selected from among the N matrices F[i], on a first baseband signal s1 generated from the first coded block and a second baseband signal s2 generated from the second coded block, respectively; the first precoded signal z1 and the second precoded signal z2 satisfying (z1, z2)T=F[i] (s1, s2)T; and changing both of or one of a power of the first precoded signal z1 and a power of the second precoded signal z2, such that an average power of the first precoded signal z1 is less than an average power of the second precoded signal z2.

Abstract: A Frequency Position Modulation system for encoding signals for transmission. A signal's discrete frequency support is used to represent symbols. The signal can be non-uniformly spread over many GHz of instantaneous bandwidth, resulting in a communications system that is resilient to interference and difficult to intercept. The FPM symbols are recovered using adaptive projections that use an analog polynomial nonlinearity paired with an analog-to-digital converter that is sampling at a rate at that is only a fraction of the instantaneous bandwidth of the signal. In the presence of partial band interference, nonlinearities generated by the transmitter are exploited by the receiver to help unambiguously recover tones that could otherwise be lost. The nonlinearities are generated by driving the power amplifier of the transmitter into saturation to induce distortions at a desired level.

Abstract: A base station and a method of operating the base station is disclosed for controlling an uplink power. A total uplink transmission power employed when transmitting via a single antenna may be offset by a total power offset value from a total uplink transmission power employed when transmitting via a plurality of antennas.

Abstract: Provided is data transmission and reception that transmits and receives data using a wireless power between wireless power transmitter and a wireless power receiver. An in-band data communication apparatus using a wireless power may include a modulating unit configured to modulate data by mixing a predetermined signal and pulse signal-type data; a demodulating unit configured to detect reflected power generated due to impedance mismatching between a source resonator and a target resonator, and to demodulate received data based on a variance of the reflected power; a source resonance unit configured to transmit transmission power including the modulated data to the target resonator, and to receive the reflected power; and a controller to control the pulse signal-type data, and to control impedance matching between the source resonator and the target resonator.

Abstract: In a method for buffering, a buffer buffers data responsive to read and write clock signals. A flag signal from the buffer is for a fill level thereof. The flag signal is toggled responsive to the data buffered being either above or below a set point for the fill level. A phase of the write clock signal is adjusted to a phase of the read clock signal responsive to the toggling of the flag signal. The write clock signal is used to control latency of the buffer. The adjusting of the phase of the write clock signal includes: generating an override signal responsive to the toggling of the flag signal; and inputting the read clock signal and the override signal to a phase adjuster to controllably adjust the phase of the write clock signal to the phase of the read clock signal during operation.

Abstract: Disclosed herein are various techniques for preventing or at least partially securing parameters—e.g., Type parameters—of electronic Subscriber Identity Modules (eSIMs) stored within an embedded Universal Integrated Circuit Card (eUICC) from being inappropriately modified by mobile network operators (MNOs). One embodiment sets forth a technique that involves modifying file access properties of the Type parameters of eSIMs to make the Type parameters readable, but not updatable by the MNOs. Another embodiment sets forth a technique that involves implementing eSIM logical containers that separate the Type parameters from the eSIM data within the eUICC, such that the Type parameters are inaccessible to the MNOs. Yet another embodiment sets forth a technique that involves implementing an Operating System (OS)-based registry that is inaccessible to the MNOs and manages Type parameters for the eSIMs that are stored by the eUICC.

Abstract: The invention provides a differential signal transmission circuit, a disk array controller, and a differential signal transmission cable, which are capable of allowing a worker to easily confirm a failure in a differential signal transmission path. The differential signal transmission circuit includes an inductance provided between positive and negative transmission paths, a DC voltage part that applies a DC voltage to the transmission paths, a monitoring part that monitors a magnitude of the DC voltage applied to the transmission paths, and a controller that detects a failure in each of the transmission paths on the basis of the magnitude of the DC voltage monitored by the monitoring part, and, when the failure is detected, outputs a notification of the occurrence of the failure.

Abstract: Methods are described allowing a vector signaling code to encode multi-level data without the significant alphabet size increase known to cause symbol dynamic range compression and thus increased noise susceptibility. By intentionally restricting the number of codewords used, good pin efficiency may be maintained along with improved system signal-to-noise ratio.

Abstract: A method including using a precoding code book for controlling transmissions from four antennas of a device, said code book including a plurality of entries, wherein said entries are such that a single layer is mapped to each selected antenna, said code book entries including different antenna pair combinations whereby one or two antenna pairs are selected for transmission.