Abstract: An RF clocked device can include a signal processor operable to receive an RF signal having an RF signal frequency and output a clock signal having a clock frequency based on the RF signal frequency. The RF clocked device can also include a clock operable to receive, and operate, using the clock signal. The clock can output at least one of a time and a date. In addition, a clock system can include an RF clocked device. The RF clocked device can include a signal processor operable to receive an RF signal having an RF signal frequency and output a clock signal having a clock frequency based on the RF signal frequency. The RF clocked device can also include a clock operable to receive, and operate, using the clock signal. The clock can output at least one of a time and a date. The clock system can also include a client device operable to receive timing information from the RF clocked device.

Abstract: [Problem] Conventionally, in a wireless communication system that performs single-carrier communication with formation of symbol blocks, it has been difficult to select the optimal GI length and modulation and coding method that achieve the maximum throughput. [Means of Solution] A transmission device and a reception device are included.

Abstract: According to the embodiment discloses a method providing direct RF sampling of the received signal in a full duplex system. A sampler in the full-duplex system comprises a buffer to clip an amplitude information from each of a coupled transmitter (Tx) signal and a voltage at an antenna port of the sampler for obtaining a buffered transmitter signal and a buffered voltage at the antenna port. Phase detector in the sampler is configured to perform sampling of time delay between the buffered transmitter signal and the voltage at the antenna port and generate an output. The sampler further comprises current integrator configured to pass the output of the phase detector for generating a sampled output, wherein the sampled output generates an output received signal.

Abstract: A wireless audio system including a transmitter using multiple antenna diversity techniques for different signal types is provided. Multipath performance may be optimized, along with improved spectral efficiency of the system.

Abstract: The disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as long term evolution (LTE). An operating method of a user equipment (UE) in a communication system includes performing radio resource control (RRC) signaling with a base station, determining a code rate based on an RRC configuration according to the RRC signaling, and determining a size of data using the code rate.

Abstract: Methods, systems, and devices for wireless communications are described that provide a repeater for beamforming a received signal at a millimeter wave (mmW) radio frequency via one or more scan angles or beamforming directions and then retransmitting and beamforming the signal at the mmW radio frequency. Repeaters may include analog and digital components for downconverting on the received signal to reduce a frequency of the signal from the mmW frequency to an intermediate frequency (IF) or baseband frequency, and then filtering the downconverted signal to reduce interference. The filtering may include digital filtering or a combination of analog and digital filtering, in which a set of filter coefficients for the digital filtering is selected based on beamforming parameters used to receive the signal, retransmit the signal, or both. The repeater may then upconvert the filtered signal back to the mmW frequency for the retransmission of the signal.

Abstract: A control device causes a first transmission system in a MIMO transmission device to transmit a first transmitting-end clock transmission signal (first transmission signal), causes a second transmission system to transmit a second transmission signal, and causes the first transmission system to transmit a third transmission signal. The control device acquires a first phase value and a second phase value. The first phase value is a phase value of the second transmission signal received in the second reception system operating based on a receiving-end clock signal synchronous with a transmitting-end clock signal by the first transmission signal. The second phase value is a phase value of the third transmission signal received in the second reception system in synchronous operation. The control device calculates a first correction value for correcting a first delay amount set value of a delay adjustment processing unit based on the first and second phase values.

Abstract: According to an aspect, there is provided a beamforming processing apparatus for a radio transmitter or receiver including an antenna array. The beamforming processing apparatus includes circuitry configured for maintaining, in a database, information on radiation properties of the antenna array and probability density functions for target device positions. The radiation properties of the antenna array include beam parameters and a beam parameter dependent beam gain function. The beamforming processing apparatus includes circuitry configured for calculating cumulative distribution functions of beam gain based on the probability density functions and the beam gain function and based thereon one or more optimal values of beam parameters defining an optimal beam by maximizing a first optimization parameter defined based on the one or more cumulative distribution functions subject to a minimum value of a second optimization parameter.

Abstract: A method includes, at a first node: transmitting a first calibration signal at a first time-of-departure measured by the first node; and transmitting a second calibration signal at a second time-of-departure measured by the first node. The method also includes, at a second node: receiving the first calibration signal at a first time-of-arrival measured by the second node; and receiving the second calibration signal at a second time-of-arrival measured by the second node. The method further includes: defining a first calibration point and a second calibration point in a set of calibration points, each calibration point comprising a time-of-departure and a time-of-arrival of each calibration signal; calculating a regression on the set of calibration points; and calculating a frequency offset between the first node and the second node based on the first regression.

Abstract: A method and apparatus for decomposition of signals with varying envelope into offset components are disclosed here, that sample the time variant envelope of a single carrier (SC) or a multi-carrier (MC) band limited signal, quantizes the sampled value using Nb quantization bits and decomposes the sample into Nb in-phase and quadrature components that are combined in pairs and modulated to generate a set of Nb offset signals. The pulse shape applied in each offset signal is selected according to the spectral mask needed for the signal and to minimize envelope fluctuations in each offset signal from the set of Nb components.

Abstract: The present invention provides a long-distance (e.g. satellite-to-ground) wireless communication method and apparatus. Two-dimensional antenna arrays are operated pairwise to produce interleaved groupings of beams which are elongated in one direction and aligned in another direction. These groupings of beams can be provided using fixed analog beamforming arrays. An active beamformer can be used to form beams which are directed within each grouping of beams. Different ports of the analog beamforming arrays can be operated to produce beams in different groupings, or different bi-sector beams within a same grouping. A simplified parametric-based channel state information precoding operation using direction of arrival for MIMO processing is also provided.

Abstract: A PAM (Pulse Amplitude Modulation) modulator driver is configured to receive a PAM input signal having N input amplitude levels and provide a PAM output signal having N output amplitude levels, where N is an integer. The PAM modulator driver circuit configured to electrically adjust amplitude levels in the PAM output signal.

Abstract: This application provides an error correction method and apparatus, relates to the field of communications technologies, so as to reduce a bit error rate of a decision feedback equalizer (DFE) and improve equalization performance. The method includes: obtaining a decision signal of a DFE; obtaining at least one of an input signal, an equalized output signal, and a difference of the DFE, where the difference is a difference between a level value of the decision signal and a level value of the equalized output signal; determining a symbol location of an end of burst error of the decision signal based on detection of at least one of the decision signal, the equalized output signal, and the difference; and when the symbol location is detected, performing error correction on the decision signal based on the at least one of the input signal, the equalized output signal, and the difference.

Abstract: The disclosure relates to 5G or pre-5G communication systems for supporting higher data transfer rates, following the 4G communication systems, such as LTE. The disclosure describes a method and a UE for sensor-based optimal antenna array switching in a wireless communication system.

Abstract: A control apparatus operable to control a plurality of access points (APs) configured to be able to use joint beamforming (JB) includes a memory containing instructions, and at least one processor for executing the instructions. The executed instructions cause the control apparatus to obtain, from a station (STA) which is a communication partner, reception information on a received signal strength at the STA of signals transmitted from the plurality of Aps, and determine, based on the reception information, a communication parameter related to JB for communication with the STA. It is determined to use JB for communication with the STA in a case where there is one or more other received signal strengths for which a strength difference from a largest received signal strength among a plurality of received signal strengths of the plurality of APs included in the reception information is within a predetermined range.

Abstract: A data reception device that can improve communication quality when transmitting/receiving serial data is to be provided. There is provided the data reception device including a signal generation unit that generates, from serial data received, a first signal whose value is inverted at a rising timing of the serial data and a second signal whose value is inverted at a falling timing of the serial data, and a clock recovery unit that performs clock recovery using the first signal and the second signal generated by the signal generation unit.

Abstract: The present disclosure includes a time-to-digital converter (TDC) based RF-to-digital (RDC) data converter for time domain signal processing polar receivers. Polar data conversion achieves better SNR tolerance owing to its phase convergence near the origin in a polar coordinate. The proposed RDC consists of a TDC for phase detection and an analog-to-digital converter (ADC) for amplitude conversion. Unlike the conversional data converter, the proposed ADC's sampling position is guided by the detected phase result from the TDC's output. This TDC assisted data-converter architecture reduces the number of bits required for the ADC. In addition, oversampling is no longer needed. With precisely controlled tunable delay cells and gain compensator, this hybrid data convertor is capable to directly convert Quadrature Amplitude Modulation (QAM) waveforms and Amplitude Phase Shift Keying (APSK) waveforms directly from the RF signal without down-conversion.

Abstract: This application discloses a data transmission solution. A terminal device generates channel state information and data for transmission in a data channel. The transmit power of the data channel is determined based on the number of bits used to transmit the data and the number of bits used to transmit the channel state information. The solution of this application reduces bit error probability and improves data decoding accuracy.

Abstract: A circuit includes a first input and output terminals to which a current, a voltage, or an electromagnetic wave (referred to as “current or the like” below) is applied, a second input and output terminals to which the current or the like is applied, a first board including a matrix circuit which is formed by a first line and includes a 90-degree hybrid circuit and a delay line, the first line in which one end is connected to the first input and output terminals and a tip of the other end is opened, a second board including a second line in which one end is connected to the second input and output terminals, and a tip of the other end is opened, and a shielding plate including an opening portion.

Abstract: An isolation estimation system includes a transmitter device, a first receiver device, a second receiver device, and a processor circuit. The transmitter device adopts a first communication technology. The transmitter device is configured to transmit a transmitting signal to the first receiving device. The second receiver device is configured to acquire a leakage signal power spectral density of a leakage signal corresponding to the transmitting signal. The second receiver device adopts a second communication technology. A bandwidth of the second communication technology is narrower than a bandwidth of the first communication technology, and the second communication technology supports a frequency hopping process. The processor circuit is configured to calculate isolation according to a signal-in-air power spectral density of the transmitting signal and the leakage signal power spectral density. The isolation is for determining whether to adjust the transmitter device.