Abstract: To obtain a high-quality enhanced signal, there is provided an apparatus including a transformer that transforms a mixed signal, in which a first signal and a second signal coexist, into a phase component for each frequency and one of an amplitude component and a power component for each frequency, a change amount generator that generates a change amount of the phase component at a predetermined frequency by using a series of data with a cross-correlation weaker than that of the phase components and randomness lower than that of random numbers, a phase controller that controls the phase component by using the change amount provided from the change amount generator, and an inverse transformer that generates an enhanced signal by using the phase component having undergone control processing by the phase controller.

Abstract: Spatial-temporal compression of sensing data from a plurality of sensors involves using a plurality of sensors to obtain measured physical data associated with a plurality of sensed elements. At each of a plurality of sampling times a set of N sampled data is acquired from the N sensed elements corresponding to the measured physical data. The sets of sampled data are analyzed to obtain statistical characteristic information. Thereafter, one or more frames of compressed data is generated using the statistical characteristic information to facilitate temporal and spatial data compression.

Abstract: The present disclosure relates to a method that includes calculating a first frequency drift associated with an oscillator at a current temperature; based on the calculation, generating a first signal indicative of temperature compensation data; generating a second signal indicative of packet data and a modulation scheme; using the first signal, the second signal, and a first predetermined signal to generate a first tuning signal; and using the first tuning signal to tune a first capacitor array coupled to the oscillator and a second tuning signal to tune a second capacitor array coupled to the oscillator such that (i) the oscillator generates a modulated RF signal indicative of the packet data and (ii) the modulated RF signal has a second frequency drift that is less than a threshold.

Abstract: A communications apparatus includes a hardware subsystem including a test signal control component, a duplexer component, and Radio Frequency processing components. The Radio Frequency processing components include a transmitter chain portion and a receiver chain portion having a signal sensitivity threshold associated therewith, to a receive side port of the duplexer component. The test signal control component is arranged to cooperate with the transmitter chain to generate a test signal. A portion of the test signal control component is leaked by the duplexer component. The test signal control component is also configured to ensure that any irradiated power of the test signal complies with the transmit OFF power threshold requirement and the portion of the test signal leaked is above the signal sensitivity threshold of the receiver chain portion.

Abstract: A technique for wireless signal processing performed at a receiver in a wireless network includes receiving, by a wireless receiver, an orthogonal frequency division multiplexing (OFDM) signal on a shared downlink channel from the wireless network, wherein the OFDM signal includes contribution from a serving cell signal and at least one interfering signal, obtaining an estimate of the serving cell signal, calculating a residual signal by subtracting the estimate of the serving cell signal from the OFDM signal, generating a whitened residual signal by whitening the residual signal, obtaining an estimate of a modulation scheme of the at least one interfering signal by performing a likelihood-based blind classification on the whitened residual signal, and performing further receiver-side processing of the serving cell signal using the estimate of the modulation scheme of the at least one interfering signal.

Abstract: Systems and methods are provided for millimeter-wave (MMW) communication, the system includes a transceiver chip to generate and to receive signals. An interface is used to communicate the signals between the transceiver chip and one or more active antenna modules. The signals include modulated MMW signals and control signals. The transceiver chip includes baseband circuitry, up and down conversion mixers, and RF front-end circuitry. An active antenna module receives a first modulated MMW signal from the interface for transmission via antennas and to receive a second modulated MMW signal from the antennas for transmission through the interface to the transceiver chip.

Abstract: Described is a cognitive signal processor (CSP) for signal denoising. In operation, the CSP receives a noisy signal as a time-series of data points from a mixture of both noise and one or more desired waveform signals. The noisy signal is linearly mapped to reservoir states of a dynamical reservoir. A high-dimensional state-space representation is then generated of the noisy signal by combining the noisy signal with the reservoir states. A delay-embedded state signal is generated from the reservoir states. The reservoir states are denoised by removing noise from each reservoir state signal, resulting in a real-time denoised spectrogram of the noisy signal. A denoised waveform signal is generated combining the denoised reservoir states. Additionally, the signal denoising process is implemented in software or digital hardware by converting the state-space representation of the dynamical reservoir to a system of delay difference equations and then applying a linear basis approximation.

Abstract: Methods and apparatus for processing an OFDM MIMO signal in a system having at least two transmitters arranged to transmit an output signal pair that includes operating a series of transformations on a pair of input signals so that each stream of the output signal pair contains decodable information from both streams of the input signal pair.

Abstract: A system and method for system and method for multiplexing control and data channels in a multiple input, multiple output (MIMO) communications system are provided. A method for transmitting control symbols and data symbols on multiple MIMO layers includes selecting a first set of codewords from Ncw codewords, distributing control symbols onto the first set of layers, placing data symbols of the first set of codewords onto the first set of layers, placing data symbols of the (Ncw-Ncw1) remaining codewords to remaining layers if Ncw>Ncw1, and transmitting the multiple MIMO layers. The first set of codewords is associated with a first set of layers from the multiple MIMO layers, and the Ncw codewords are to be transmitted simultaneously and the first set of codewords comprises Ncw1 MIMO codewords, where Ncw and Ncw1 are integers greater than or equal to 1. The remaining layers are MIMO layers from the multiple MIMO layers not in the first set of layers.

Abstract: It is made possible to compensate for a waveform distortion having semi-fixed characteristics and a waveform distortion varying at high speed with a high degree of accuracy.

Abstract: An RF transmitter arrangement using analog pre-distortion is disclosed. The arrangement includes lower bandwidth circuitry, an analog pre-distorter, and a non-linear amplifier chain. The lower bandwidth circuitry is configured to generate an analog signal. The analog pre-distorter is configured to apply a non-linear distortion to the analog original signal based on a coupled feedback signal in order to generate an RF output signal. The non-linear amplifier chain is configured to amplify the RF output signal to generate a transmission signal relative to the analog original signal. The coupled feedback signal is derived from the transmission signal.

Abstract: Described is a system for signal denoising. The system linearly maps a noisy input signal into a high-dimensional reservoir, where the noisy input signal is a time-series of data points from a mixture of waveforms. A high-dimensional state-space representation of the mixture of waveforms is created by combining the noisy input signal with reservoir states. A delay embedded state signal is generated from the reservoir states, and a denoised spectrogram of the noisy input signal is generated.

Abstract: A device includes a signal input to receive a data input as part of a bit stream. The device also includes a reference input to receive a reference signal. The device further includes push circuitry to receive a first weight value, receive a first correction value, and generate a push signal based on the first weight value and the first correction value to selectively modify the data input as well as pull circuitry to receive a second weight value, receive a second correction value, and generate a pull signal based on the second weight value and the second correction value to selectively modify the data input.

Abstract: A method of transmitting a signal, which is transmitted by a transmitting end in a wireless communication system, is disclosed in the present specification. Specifically, the method includes the steps of receiving Doppler information on a plurality of transmission beams from a receiving end; selecting a beam combination using the received Doppler information, wherein the beam combination is selected from a plurality of beam combinations depending on effective Doppler spread values of the beam combinations, wherein each of the beam combinations consists of two or more transmission beams among the plurality of transmission beams; and transmitting the signal to the receiving end using at least one transmission beam included in the selected beam combination.

Abstract: To provide a receiver, a communication device, and a communication method capable of restoring a signal transmitted via a non-contact transmission channel with high accuracy. A communication device has a transmission circuit that converts an input signal into a pulse, a non-contact transmission channel that has a primary side coil and a secondary side coil and transmits the pulse from the transmission circuit in a non-contact manner, a restoration circuit that restores the input signal on the basis of a reception signal corresponding to the pulse transmitted via the non-contact transmission channel, an initialization unit that initializes an output of the non-contact transmission channel, and an initialization control unit that outputs a control signal of controlling the initialization unit on the basis of the reception signal corresponding to the pulse received via the non-contact transmission channel.

Abstract: An access point of a wireless communication network forms beams by applying a weightset for a beamforming weights matrix to signal streams. The Equivalent Isotropic Radiated Power (EIRP) that is emitted from an array of antenna elements at the access point is controlled by calibrating the transmission phase and gain of a respective transmit chain for each antenna element, providing a polar radiation model for an antenna element of the array, and determining a weightset for the weighting matrix subject to a constraint that a maximum total EIRP for the beams in combination in any azimuth direction is maintained within a predetermined EIRP limit, based at least on a spatial separation of the antenna elements, the polar radiation model and the calibrated transmission phase and gain of each respective transmit chain.

Abstract: A synchronization solution is described, which, in one aspect, allowed finer grained segmentation of clock domains on a chip. This solution incorporates computation into the synchronization overhead time and is called Gradual Synchronization. With Gradual Synchronization as a synchronization method, the design space of a chip could easily mix both asynchronous and synchronous blocks of logic, paving the way for wider use of asynchronous logic design.

Abstract: An important component in digital circuits is a phase rotator, which permits precise time-shifting (or equivalently, phase rotation) of a clock signal within a clock period. A digital phase rotator can access multiple discrete values of phase under digital control. Such a device can have application in digital clock synchronization circuits, and can also be used for a digital phase modulator that encodes a digital signal. A digital phase rotator has been implemented in superconducting integrated circuit technology, using rapid single-flux-quantum logic (RSFQ). This circuit can exhibit positive or negative phase shifts of a multi-phase clock. Arbitrary precision can be obtained by cascading a plurality of phase rotator stages. Such a circuit forms a phase-modulator that is the core of a direct digital synthesizer that can operate at multi-gigahertz radio frequencies.

Abstract: A synchronization device has a signal reception unit and a signal generation unit. The latter provides a multicarrier signal, which serves as an internally transmitted signal. The former receives the same type of externally received signal as the internally transmitted signal. An STO timing detection unit detects a position at which a correlation value in the correlation calculation between sampled data of the internally transmitted signal shifted at a predetermined sampling interval and sampled data of the externally received signal is maximum as an STO timing. A difference calculation unit calculates a difference between phases of the externally received signal and the internally transmitted signal at each subcarrier in a state in which the STO timing is detected. A correction control unit executes correction control on the signal generation unit such that a difference in a phase of each calculated subcarrier is added as a correction amount.

Abstract: The present disclosure provides a method for symbol compensation. The method comprises, for a symbol consisting of a first portion and a second portion: estimating a length of the first portion; calculating an average power of the first portion and an average power of the second portion based on the length of the first portion; determining a relative scaling factor by which the average power of the first portion is scaled relative to that of the second portion; and compensating for the first portion based on the relative scaling factor.