Abstract: Provided is a transmission method that improves data reception quality in radio transmission using a single-carrier scheme and/or a multi-carrier scheme. The transmission method includes: generating a plurality of first modulated signals s1(i) and second modulated signals s2(i) from transmission data, the plurality of first modulated signals s1(i) being signals generated using a QPSK modulation scheme, and the plurality of second modulated signals s2(i) being signals generated using 16QAM modulation; generating, from the plurality of first modulated signals s1(i) and the plurality of second modulated signals s2(i), a plurality of first signal-processed signals z1(i) and a plurality of second signal-processed signals z2(i) which satisfy a predetermined equation; and transmitting the plurality of first signal-processed signals z1(i) and the plurality of second signal-processed signals z2(i) using a plurality of antennas.

Abstract: A method of calibrating a clock phase and a voltage offset includes receiving an input data signal that is periodically toggled. A clock phase calibration operation is performed based on an up signal and a down signal, such that phases of a plurality of clock signals are adjusted. The up signal and the down signal are generated based on the input data signal, a reference voltage and the plurality of clock signals. A voltage offset calibration operation is performed based on the up signal, the down signal and a first sample data signal, such that a voltage level of the reference voltage is adjusted. The first sample data signal is generated by sampling the input data signal based on one of the plurality of clock signals. The clock phase calibration operation and the voltage offset calibration operation are performed independently of each other and not to overlap with each other.

Abstract: The present invention discloses wireless communication method and wireless communication apparatus. Provided is an electronic equipment for a first communication apparatus of a wireless communication system, comprising: a number of antenna sub-arrays, each sub-array comprising a plurality of antennas, each column or row in the sub-array corresponding to one input terminal; a plurality of groups of first direction phase shifter, wherein the first direction phase shifters in each group are disposed between the input terminal of the corresponding sub array and a radio frequency chain, wherein each group of the plurality of groups of first direction phase shifters is configured to adjust a first direction angle of an antenna wave beam for transmitting a corresponding radio frequency chain signal in a first direction in accordance with a first control signal.

Abstract: A system and a method of demodulating a frequency shift keying signal are provided. The method includes steps of: inputting the frequency shift keying signal; accumulating cycles of the frequency shift keying signal to a reference cycle number from a time point; finding an initial point of each of pulse waves of the frequency shift keying signal; accumulating the cycles to the reference cycle number multiple times from the initial point and extracting data of each accumulation; determining whether or not the number of times of extracting the data reaches a preset value, if not, returning to the previous step, if yes, performing the next step; determining whether or not a difference between the data is larger than a threshold, if not, outputting a first bit value, if yes, outputting a second bit value; and packing the first and second bit values into a demodulated signal.

Abstract: Network devices and systems in 5G and new radio (NR) infrastructures can utilize beam management operations to ensure communications for beam management procedure triggering including beam reporting, even during fall-back mode when the current receive (Rx) beam for downlink (DL) and transmit (Tx) beam for uplink (UL) fail. Additionally, reduction in overhead can be achieved with a reference beam pair link based beam reporting in a fall-back mode or not. This beam reporting can be a group based beam reporting and based on Reference Signal Received Powers (RSRPs) of beams and a differential RSRP corresponding thereto.

Abstract: Diversity receiver front end systems with fixed impedance matching circuits to improve signal processing. The fixed impedance matching circuits can be configured to reduce out-of-band metrics such as noise figure and/or gain for a plurality of out-of-band frequency bands while reducing or not increasing above a certain threshold an in-band metric for the associated in-band frequency band. Each of a plurality of paths through the front-end systems can include fixed impedance matching circuits that accomplish this tuning to improve performance for the front-end systems.

Abstract: According to certain embodiments, a method for use in a wireless transmitter for simultaneously transmitting a plurality of wireless signals using a plurality of antenna elements comprises selecting a non-constant modulus (NCM) spatial precoder from a NCM codebook comprising a plurality of NCM spatial precoders. The plurality of the NCM spatial precoders are based on a unit-power beamforming vector optimized so that the wireless transmitter transmits up to the full power of each antenna element of the plurality of antenna elements while an overall transmitted power remains constant. The method further comprises applying the selected NCM spatial precoder to a data signal for generating a plurality of coded signals; and transmitting the plurality of coded signals as wireless signals via a power amplifier operating at full power.

Abstract: The present disclosure provides a data transmission method, includes: multiplying a frequency of a basic clock, so as to obtain a frequency-multiplied clock, in which a maximum number of high levels in the frequency-multiplied clock is greater than a maximum numerical value that the bit number can represent; removing an invalid bit width from the data to be transmitted, and determining a bit number of an effective bit width thereof and a numerical value represented by the effective bit width; determining a data period, according to the bit number of the effective bit width in the data to be transmitted; determining an actual number of high levels, according to a numerical value represented by the effective bit width in the data to be transmitted; and transmitting the data to be transmitted based on the frequency-multiplied clock, according to the data period and the actual number of the high levels.

Abstract: Provided are a communication method based on a peak-to-average ratio (PAPR) and a transmission apparatus and a receive apparatus using the same and a communication method based on a peak-to-average ratio (PAPR) by a transmission apparatus according to an exemplary embodiment of the present disclosure includes: obtaining each of PAPR values corresponding to respective data symbols from a lookup table having a unique PAPR value; Generating a synchronization signal configured in a random sequence based on a the PAPR value of each data symbol; and transmitting the synchronization signal.

Abstract: A communication device includes a signal determiner determining whether there is a reception signal, and a period estimator estimating an interruption period of interruption of a signal transmitted from a device as a source of the reception signal, using a determination result from the signal determiner.

Abstract: A binning-based transmit beamforming for wireless communication systems includes determining a time correlation and a frequency correlation of a beamforming vector estimated from a previous transmission on a current hopping channel and one or more neighboring channels using one or more binning architectures that exploit channel correlation in both frequency and time dimensions. These binning architectures include global binning, local binning, and adaptive version of global and local binning. The subject system determines one or more beamforming weights for the current hoping channel according to the binning architecture, and provides, for transmission, a signal using transmit beamforming based on the one or more beamforming weights.

Abstract: A semiconductor device including a signal generator and decoding and timing skew adjusting circuit is provided. The signal generator is configured to receive n multi-level signals having m signal levels and convert the n multi-level signals into n*(m?1) single level signals having two signal levels. The decoding and timing skew adjusting circuit is configured to receive the single level signals, perform a predefined operation on the single level signals to generate an output signal, and compensate for timing skew between the n multi-level signals, using the single level signals. The n and m are natural numbers, where n>=2 and m>=3.

Abstract: The equalizer has a first differential pair having a first transistor and a second transistor and a second differential pair having a third transistor and a fourth transistor. A first terminal of the first transistor and a first terminal of the third transistor are connected to each other, and a first terminal of the second transistor and a first terminal of the fourth transistor are connected to each other, so that the first differential pair and the second differential pair have common input terminals. Also, resistors are respectively connected to second terminals of the first, second, third, and fourth transistors, a first zero point generation circuit is connected between the second terminal of the first transistor and the second terminal of the second transistor, and a second zero point generation circuit is connected between the second terminal of the third transistor and the second terminal of the fourth transistor.

Abstract: A repeater includes a donor device, a service device, a control board circuit and a processing circuit. The repeater provides beam selection mechanisms applicable to several scenarios for base stations and CPE, in which an adaptive gain control mechanism can be utilized to reduce oscillations in a down-link circuit and an up-link circuit of the control board circuit.

Abstract: The present disclosure relates to a circuit for calibrating a baud rate. The circuit includes: a first counter connected to a receiving module of a serial port chip and configured to record a first low level duration of a data frame received by the receiving module; a second counter configured to: receive a bit sampling pulse generated from sampling the data frame according to a current baud rate of the receiving module, and record a quantity of the bit sampling pulse in the first low level duration; a divider, connected to the first counter and the second counter and calculate a calibration baud rate according to the first low level duration and the quantity of the bit sampling pulse in the first low level duration; and a selector, connected to the receiving module and the divider and configured to output the calibration baud rate to the receiving module.

Abstract: Examples described herein include systems and methods which include wireless devices and systems with examples of cross correlation including symbols indicative of radio frequency (RF) energy. An electronic device including a statistic calculator may be configured to calculate a statistic including the cross-correlation of the symbols. The electronic device may include a comparator configured to provide a signal indicative of a presence or absence of a wireless communication signal in the particular portion of the wireless spectrum based on a comparison of the statistic with a threshold. A decoder/precoder may be configured to receive the signal indicative of the presence or absence of the wireless communication signal and to decode the symbols responsive to a signal indicative of the presence of the wireless communication signal. Examples of systems and methods described herein may facilitate the processing of data for wireless communications in a power-efficient and time-efficient manner.

Abstract: An apparatus generating a packet of signals, a number of preamble signals of a preamble portion for each of a number of radio transmission units, and a number of data signals of a data portion, wherein a phase rotation in frequency domain is equal to a time shift in time domain is applied to each symbol of the number of preamble signals separately, the same phase rotation is applied to each symbol separately, the amount of the phase rotation is different for each preamble signal and each data signal, the amount of the phase rotation of one of the number of data signals and one of the number of preamble signals is both zero, and the amount of the phase rotation is equal between one of the preamble signals and one of the data signals for the same radio transmission unit.

Abstract: There is provided a method of generating a space-time block code (STBC) for encoding a digital data sequence comprising a set of independent symbols to be transmitted through a transmission channel in a communication system, the space-time block code being represented by a set of linear dispersion matrices in a linear dispersion representation, each linear dispersion matrix comprising components having complex values, the method comprising, generating at least some of the linear dispersion matrices depending on component-wise conditions related to a set of selected pairs of the linear dispersion matrices, each pair comprising a first linear dispersion matrix and a second linear dispersion matrix, said component-wise conditions comprising a component-wise condition between the components of the first linear dispersion matrix and the components of the second linear dispersion matrix.

Abstract: Apparatus and methods are provided for noise-whitening post-compensation in a receiver. A first apparatus includes a first whitening filter configured to filter a received signal comprising symbols to generate a first filtered signal. The first apparatus further includes a first decision feedback equalizer having an input coupled to an output of the first whitening filter to receive the first filtered signal. The first decision feedback equalizer is configured to apply decision feedback equalization to the first filtered signal to generate estimates for the symbols of the received signal. A second apparatus includes a decision device configured to generate a symbols decision based on a received signal comprising symbols, a noise predictor configured to predict noise in the received signal, and a subtractor configured to subtract the predicted noise from the received signal to generate a symbols estimate.

Abstract: Systems, methods, apparatuses, and computer-readable storage media for communicating a base station signal, such as a data signal, a control signal, or both, from a base station to a user equipment (UE) during a measurement window. In some aspects, the UE signals its availability corresponding to a measurement window to a serving base station. In some aspects, the UE signals a guard period associated with the measurement window to the serving base station. In other aspects, the serving base station signals a guard period to the UE.