Abstract: A system may include a clock and data recovery circuit that includes one or more analog components. The system may also include a digital control circuit configured to control the clock and data recovery circuit. The digital control circuit and the clock and data recovery circuit may be formed on a single substrate.

Abstract: Methods, apparatuses, and systems are described related a data receiver circuit having a pair of offset edge samplers to sample a data signal, at an edge sampling time between data samples, with respect to different reference levels. A clock-data recovery (CDR) circuit of the receiver circuit may determine an A-count that corresponds to a number of times the signal level of the data signal at the edge sampling time is between the reference levels of the offset edge samples to provide a signal integrity metric for the receiver circuit. The CDR circuit may dynamically update its settings based on the A-count.

Abstract: A digital adjusting signal for adjusting a multi-channel SQUID system is transmitted only to a control circuit module including a SQUID channel selected in an embodiment of the present invention and not transmitted to other modules. Accordingly, the digital adjusting signal is prevented from flowing into all SQUID adjusting channels to minimize noise generated by the digital adjusting circuit of the SQUID channel and to stably control the SQUID sensor without malfunction.

Abstract: A system for evaluating the performance of beam forming antennas based on correlations of signal to noise measurements of individual scattering elements in the antennas. An RF source provides a radio frequency (RF) signal having a first frequency to an input of the antenna. Each of the antenna's scattering elements are individually selectable to emit the RF signal. A bias signal sequentially turns off and on each scattering element while emitting the RF signal. Also, a characteristic of the RF signal emitted by each scattering element is separately measured and each difference between the characteristics are identified and compared to one or more threshold values. A report regarding the differences that exceed the threshold value is provided to a user.

Abstract: A simultaneous information and energy transfer method and system with a guard interval signal are provided. The method comprises the steps of generating, by a transmitting terminal, a controllable guard interval signal according to the current energy demand and environment conditions for channel transmission. The system comprises a transmitting terminal configured to generate a controllable guard interval signal. In the system and method, the guard interval time is fully utilized to transfer a guard interval signal with controllable amount of energy, which not only prevents intersymbol interference, but also provides controllable energy signals within the guard interval time at the same time, thus improving the energy transfer performance of the system and reducing the probability that the receiving terminal is unable to operate normally due to energy shortage. The present invention can be widely applied to a variety of simultaneous wireless information and energy transfer systems.

Abstract: A method and apparatus for equalization in a communication system. The method includes receiving an input of a block of symbols, filtering the input in the frequency domain, calculating an error factor in the time domain based on the filtered input, updating tap weights of the equalizer in the frequency domain using circular correlation based on the error factor and the conjugate of the input in the frequency domain, and outputting the filtered input.

Abstract: A communication apparatus (100) of the present invention includes a first communication circuit (2), a second communication circuit (1), and one signal line (3). The first communication circuit (2) transmits a collector voltage of an open collector circuit as an output signal. A second communication circuit (1) receives the output signal. The one signal line (3) connects the first communication circuit (2) and the second communication circuit (1). Particularly the first communication circuit (2) transmits the output signal as a pulse signal (57) to the second communication circuit (1). The second communication circuit (1) transmits a voltage signal (56) generated in the second communication circuit (1) to the first communication circuit (2). The first communication circuit (2) and the second communication circuit (1) communicate the pulse signal (57) and the voltage signal (56) bidirectionally via the signal line (3).

Abstract: A method of transmitting Ethernet data over multiple physical sub-channels is disclosed. The method includes determining one or more noisy sub-channels affected by alien crosstalk; selectively reducing a number of data bits per symbol for transmitted data symbols along the noisy sub-channels; transmitting data along the noisy sub-channels via sparser constellations; and transmitting data along non-noisy sub-channels via denser constellations.

Abstract: A data modulation apparatus may comprise a S2D conversion part including a first amplifier operating based on a carrier wave signal and two transformers receiving an output signal of the first amplifier; a first switch part transferring status of input data to the first amplifier based on the input data; a differential amplification part receiving output signals of the S2D conversion part and amplifying the output signals of the S2D conversion part; a D2S conversion part receiving output signals of the differential amplification part and performing modulation on the output signals by converting the output signals to a single signal; and a second switch part transferring the output signals of the differential amplification part to the D2S conversion part based on the input data. Here, the first switch part and the second switch part may be alternately turned on and off.

Abstract: Disclosed is a DC offset cancellation (DCOC) method, comprising: after a receiver is electrified, acquiring a digital signal of an offset voltage at a circuit output port in the receiver, obtaining a digital control signal for controlling a DCOC output stage from the digital signal, and outputting, by the DCOC output stage, a current to a corresponding circuit of the receiver according to the digital control signal. Also disclosed is a DC offset cancellation device.

Abstract: A driver circuit includes a first inverter, a bias-control circuit, and a second inverter. The first inverter, which is connected between a first supply voltage and ground, receives an input data signal and generates an inverted version of the input data signal. The bias-control circuit, which is connected between a second supply voltage and the first inverter, receives the inverted version of the input data signal and a bias signal, and generates a level-shifted data signal based on the inverted version of the input data signal, the bias signal, and the second supply voltage. The bias-control circuit reduces a difference between voltage levels of the second supply voltage and the inverted version of the input data signal. The second inverter is connected between the second supply voltage and ground, and further connected to the bias-control circuit and first inverter and generates an output data signal.

Abstract: An apparatus is provided which comprises: a data slicer to receive first data sampled by a data clock; an edge slicer to receive second data sampled by an edge clock; and a Least Mean Square (LMS) circuitry coupled to the data and edge slicers, wherein the LSM circuitry is to generate a code to adjust a phase of one of data clock and/or edge clock relative to one another.

Abstract: A transmission method based on multiple antennas with directivity at the information level. In this transmission system, the directivity is introduced in the transmitted information by an optimization of the constellation's symbols only in the desired direction, keeping at same time an isotropic radiation power pattern by the antenna array The method allows the transmission of modulations with multilevel constellations based on M-QAM (M-ary Quadrature Amplitude Modulation) constellations, Voronoi constellations or M-PSK (M-ary Phase Shift Keying), using a decomposition of multilevel modulation into a sum of M? polar or BPSK (Binary-PSK) constellations that are amplified and transmitted by separate antennas. Therefore it uses up to M? parallel modulators, each one followed by an amplifier connected to an antenna. This transmission scheme transmits up to M? uncorrelated BPSK signals, that are added in the transmission channel to form a multilevel constellation.

Abstract: An apparatus and method for broadcast signal frame using a bootstrap and a preamble are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a time interleaver configured to generate a time-interleaved signal by performing interleaving on a BICM output signal; and a frame builder configured to generate a broadcast signal frame including a bootstrap and a preamble using the time-interleaved signal.

Abstract: A method is provided for determining, by a base station, a Virtual-Multiple-Input Multiple-Output (V-MIMO) cluster in a wireless communication system. The base station determines a transmission efficiency of a temporary cluster and selects one or more entry candidate nodes contained in the temporary cluster. The base station determines an entry transmission efficiency. The entry transmission efficiency is a transmission efficiency when the entry candidate node enters a V-MIMO unit cluster. The base station determines whether to make the entry candidate node enter the V-MIMO unit cluster by comparing the entry transmission efficiency with the transmission efficiency of the temporary cluster.

Abstract: Method and device for configuring a waveform at a transmitter are provided. The method includes: receiving at least one input signal, each input signal corresponding to a subcarrier spacing setting; performing IDFT pre-processing to each input signal, the IDFT pre-processing including DFT pre-coding or offset modulation; performing IDFT to each input signal which is subjected to the IDFT pre-processing, the IDFT including an IDFT with parameters including resource mapping and a corresponding IDFT size; performing IDFT post-processing to each input signal which is subjected to the IDFT to obtain at least one output signal, the IDFT post-processing including cyclic extension and time-domain windowing; adding the at least one output signal in time domain; and transmitting the added signal through a corresponding antenna port.

Abstract: A receiver circuit includes a conversion circuit configured to down-convert a received radio-frequency signal to a baseband signal, an analog-to-digital converter configured to sample the baseband signal into a sampled signal, a Fast Fourier transform (FFT) circuit configured to perform an FFT on the sampled signal, and a digital compensation circuit configured to compensate for IQ distortion in a frequency domain.

Abstract: A method and an apparatus for transmitting and receiving data in a filter bank based multicarrier communication system are provided. The method includes receiving a plurality of data blocks and performing an Inverse Fast Fourier Transform (IFFT) operation on the plurality of data blocks, multiplying the plurality of data blocks on which IFFT has been performed and time axis filter coefficients, and transmitting a result obtained by adding the plurality of multiplied data blocks as a multi carrier signal.

Abstract: A testing device (3), especially a fading simulator incorporating antenna and circuit parameters, for testing a device under test (6), comprises a signal generating unit (4) and a fading simulation unit (5). The signal generating unit (4) generates a first number of signals according to a number of transmitting means (1) for a simulated transmission to the device under test (6). The fading simulation unit (5) outputs a second number of faded signals, which corresponds to a number of receiving means (2) of the device under test (6), to the device under test (6). It simulates the transmission channels between said transmitting means (1) and said receiving means (2) with the aid of an extended channel correlation matrix comprising a channel correlation matrix based on receive antenna characteristics of the device under test (6).

Abstract: A satellite radio signal receiver includes a receiving section which receives radio signals from satellites and demodulates the signals to identify bits of the demodulated signals as received bits; and a processor. The processor compares each received bit of the satellites with estimated bits which are estimated to be received within a possible deviation range from a current date and time acquired as a reception timing of the received bit to obtain comparison result information between the received bits and the estimated bits in relation to deviations within the possible deviation range with respect to each of the satellites, integrates the comparison result information on the received bits of the satellites, specifies a deviation that satisfies a match condition of the received bits and the estimated bits based on the integrated comparison result information, and acquires date and time information based on the deviation that satisfies the match condition.