Abstract: A distributed phase-correction circuit is described. This distributed phase-correction circuit reduces jitter in a delay line by averaging edge delay through local feedback of signals internal to the delay line. In particular, the distributed phase-correction circuit includes a delay line with multiple cascaded first phase-alignment elements that each delay the input signal by a fraction of the period (i.e., that perform distributed phase correction) based on feedback signals from a second delay line.

Abstract: A signal acquisition and processing method includes a step of acquiring signals in at least two acquisition channels (A1, A2, . . . , AN); a step of detecting the acquired signals in at least two detection channels (V1, V2, . . . , VN) associated respectively with the two acquisition channels; a step of distributing the detected signal or signals that result from the detection step in at least one computing tile available in a set of computing tiles; a step of storing the detected signal or signals in the computing tile or tiles; and a step of processing the signals stored in the computing tile or tiles in order to obtain data characteristic of the detected signals. The method can apply to the acquisition and processing of non-deterministic data (nuclear instrumentation, laser instrumentation, radar detection, etc.).

Abstract: Methods and systems for I/Q mismatch calibration and compensation for wideband communication receivers may include receiving a radio frequency (RF) signal in a receiver of a communication device, down-sampling the received RF signal to generate a channel k and its image channel ?k at baseband frequencies, and determining average in-phase (I) and quadrature (Q) gain and phase mismatch of the channel k and the image channel ?k. A curvature of gain mismatch for the channel k and the image channel ?k may be estimate utilizing a blind source separation (BSS) estimation algorithm. The average I and Q gain and phase mismatch of the channel k and the image channel ?k may be removed. A residual phase tilt and a residual amplitude tilt of the channel k and the image channel ?k (with removed average I and Q gain and phase mismatch) may be determined.

Abstract: Power consumption when reception is carried out in response to a reception instruction by a user is reduced in a satellite radio-controlled wristwatch.

Abstract: A method for signal processing is provided. The method includes: obtaining a predistortion signal for compensating nonlinear distortion generated by a transmission path; adding the predistortion signal to the transmission path to compensate the nonlinear distortion; and outputting the nonlinear distortion compensated signal by the transmission path. With the above method, the nonlinear distortion of the transmission path can be compensated without modifying a current transmission path, thereby enhancing transmission performance of a transmitter by using a simple structure.

Abstract: A signal processing method is disclosed. The method includes identifying a preferred loss profile for a plurality of signal transmission channels and generating a filter transfer function corresponding to each of the plurality of signal transmission channels, where each filter transfer function is configured to produce a filtered signal with a loss profile approximately equal to the preferred loss profile. The method further includes generating a plurality of filtered signals by filtering a plurality of signals using the filter transfer function corresponding to each of the plurality of signal transmission channels. and transmitting the plurality of filtered signals to a plurality of receivers via the plurality of signal transmission channels.

Abstract: A dynamic and flexible architecture and methods for demodulation of high data-rate streams with high symbol-rates, such as in satellite communications systems or computer network communications systems, is provided. A data stream of a data transmission is received, the data stream corresponding to a plurality of data symbols. A plurality of data samples corresponding to each of the data symbols is generated. Further, one or more representative data samples, corresponding each of the data symbols, are generated based at least in part on timing control signals and the generated data samples for the respective data symbol. The generated data samples corresponding to each of the data symbols other than the representative data samples are dropped. The timing control signals are then adjusted based at least in part on the generated representative data samples.

Abstract: Provided are apparatuses, systems and methods for performing communication using wireless power. According to one general aspect, a communication device using wireless power may include: a controller configured to determine whether a mutual resonance occurs between a target resonator and a source resonator; and a modulator configured to modulate data based on whether the mutual resonance occurs.

Abstract: Described embodiments provide for, in a receiver circuit, an adaptation process that adjusts the IQ-skew automatically to obtain proper eye centering in a data eye, thereby maximizing horizontal margin of the eye. The IQ-skew adaptation algorithm is realized with a ‘biased’ bang-bang phase detector (BBPD) oof a clock and data recovery circuit (CDR) that biases the weights applied to UP and DOWN outputs of the phase detector, rather than treating them equally. By weighting the BBPD UPs and DOWNs differently, the system locks to the left and right inner corners, and thereby is able to locate the center of the inner eye.

Abstract: A frame configuration used for both SISO transmission and MISO and/or MIMO transmission. According to the frame configuration, a frame has a preamble, a control symbol, and transmission data symbols. A transmission device includes the designation of a transmission scheme of the transmission data symbols in the control symbol and includes the designation of a transmission scheme of the control symbol in the preamble. This frame configuration improves the reception performance (detection performance) of a reception device.

Abstract: A system and method is disclosed for a digital to analog converter which includes an interpolation filter to up-sample a digital signal, a cascaded digital pulse width modulation noise shaper having multiple stages to suppress in-band quantization errors due to digital pulse width modulation and truncation errors, and a hybrid finite impulse response filter/digital to analog converter coupled to a reconstruction filter which outputs the analog signal. The cascaded noise shaper stages each operate using the same quantization error signal.

Abstract: A half-rate clock data recovery circuit comprises a detector receiving data alternating between even and odd symbols and further receives a four-phase clock. The detector outputs a phase error signal to a phase dissect circuit which outputs an even-symbol phase error and an odd-symbol phase error, which are input to filters to produce first and third control signals. A first 2-bit ADC also receives the even and odd data and outputs even symbol data in accordance with a second phase of the four-phase clock. A second 2-bit ADC also receives the data and outputs odd symbol data in accordance with a fourth phase of the four-phase clock. The even and odd symbol data are input into respective vertical eye monitors which output second and fourth control signals. A quadrature clock generator adjusts the clock based on the control signals. A method uses the half-rate clock data recovery circuit.

Abstract: An optical modulator has a continuous wave laser input, an RF input, a bias and dither input and an output. A photodiode connected to an output tap produces a voltage that is amplified. Noise is removed from the amplified output. A spread-spectrum dither harmonic is generated and supplied to a multiplier with the amplified and filtered feedback and is used to create a DC bias. A spread-spectrum dither is created and added to the DC bias. Spread spectrum dither and bias both are applied to the bias input of optical modulator. The bias and spread spectrum dither controller is usable with other non-optical modulators and other electronic devices.

Abstract: A radio transmitter and so forth capable of improving the precision of frequency domain equalization while transmitting a longer pilot sequence. In a series of pilot blocks generated from one pilot sequence with the same length as a data sequence such as a CAZAC sequence, the transmitter defines the rear end of each pilot block as the cyclic prefix of the next pilot block and defines the rear end of the last pilot block as the cyclic prefix of the first pilot block.

Abstract: Various circuits and methods are disclosed for communications over AC power lines. In one example embodiment, a power line communication circuit includes an analog front end having a data-coupling circuit configured to communicatively couple communication signals to and from a set of AC power lines in the power line communication system. The analog front end also includes a noise reduction circuit that is coupled to the data-coupling circuit. The noise reduction circuit is configured to mitigate noise within a communication frequency band of the communication signals by filtering, from the communication signals, at least one frequency that is located outside of the communication frequency band and that has harmonics located within the communication frequency band. A receiver circuit is coupled to the noise reduction circuit and is configured to demodulate data from the communication frequency band of the filtered communication signals.

Abstract: An apparatus and a method are provided including a parameter estimator, a controller, an initial channel estimator, and a channel estimator. The parameter estimator configured to estimate parameters related to a channel. The controller configured to select one of channel environments based on the parameters, and generate a control signal corresponding to the selected channel environment. The initial channel estimator configured to estimate an initial channel based on the control signal. The channel estimator configured to estimate a channel of remaining resource blocks, excluding resource blocks corresponding to a pilot signal, from among resource blocks, based on the initial channel and the control signal.

Abstract: A method of compensating phase error of a received signal is disclosed. The signal comprises a symbol set comprising a plurality of symbols of a first type having an N-Quadrature Amplitude Modulation, N-QAM, signal configuration, where N is an integer larger than 4, and at least one symbol of a second type having an Amplitude and Phase-Shift Keying, A-PSK, signal configuration, wherein both the symbols of the first type and of the second type carries data and wherein the symbols of the second type also are arranged as pilot symbols for determination of phase rotation determination. A receiver and transmitter, as well as a communication system, employing the symbol set are disclosed.

Abstract: Systems and methods for channel assignment configuration in a multiple access point (AP) environment are provided. The multiple APs can be homogeneous or heterogeneous and can implement one or more radio access technologies (RATs), including Massive Multiple Input Multiple Output (M-MIMO) RATs. A channel assignment configuration for a user equipment (UE) can identify one or more communication channels to be established to serve the UE by one or more of the APs.

Abstract: An approach is provided for high penetration alerting in a mobile satellite system. A message is generated for transmission to a wireless terminal. The message is partitioned into a number of symbols, each symbol composed of a portion of the message. The symbols are encoded via FEC coding to generate outer coded symbols, and each outer coded symbol is encoded based on a corresponding binary orthogonal sequence. The inner coded symbols are modulated based on a binary modulation scheme, and pulse shaped to generate message bursts for transmission to the wireless terminal. Each message burst reflects a group of the inner coded symbols, wherein the grouping of the inner coded symbols facilitates joint sequence detection by the wireless terminal, and each message burst exhibits relatively low peak-to-average power ratio.

Abstract: A receiver comprises a sequence estimation circuit and a soft-input-soft-output (SISO) decoder. The sequence estimation circuit comprises circuitry operable to generate first soft bit decisions for symbols of a received inter-symbol-correlated signal. The SISO decoder comprises circuitry operable to decode the first soft bit decisions to generate corrected soft bit decisions. The circuitry of the sequence estimation circuit is operable to generate, based on the corrected soft bit decisions, second soft bit decisions for the symbols of the received inter-symbol-correlated signal, which are improved/refined relative to the first soft bit decisions.