Abstract: A system for determining a direction of arrival of a radio signal being emitted by a radio emitter, the system including: a single antenna configured to be moved through multiple spatial positions and configured to receive the radio signal at two or more of the multiple spatial positions; and a controller configured to determine one or more directions of arrival of the radio signal based on: a radio signal frequency; at least one residual phase difference value between at least two of two or more residual phase values each obtained based on the radio signal received by the single antenna at one of the two or more multiple spatial positions; and at least a portion of a motion data indicative of the movement of the single antenna.

Abstract: A receiver includes an interface and a processor. The interface is configured to receive a signal including symbols carrying bit values in respective symbol intervals, and to convert the received signal into a serial sequence of digital samples, the received signal being modulated using a Differential Manchester Encoding (DME) scheme that (i) represents a first bit value by a first symbol type having a level transition in the corresponding symbol interval and (ii) represents a second bit value by a second symbol type having a constant level in the corresponding symbol interval. The processor is configured to derive an error signal from the digital samples, and to produce a quality measure of the received signal based on the derived error signal.

Abstract: It is recognized herein that as the number of transmit antennas in cellular systems (e.g., NR or 5G systems) increase, the Channel State information (CSI) feedback overhead may increase to unacceptable levels, and the current CSI feedback might not support beamforming training for NR. Embodiments described herein provide an enhanced and more efficient design for Channel State Information feedback as compared to current approaches.

Abstract: Methods, systems, and apparatuses are presented to transmit fragmented communication frames, such as fragmented ultra-wideband (UWB) frames. In some implementations, a communication frame may be divided into a plurality of fragments, and the fragments may be transmitted across a plurality of regulatory test intervals. E.g., each fragment may be transmitted within a mutually-exclusive regulatory test interval. In some implementations, each fragment may be constrained in time and/or transmission power, such that the total energy emitted during transmission of the fragment remains within a maximum energy limit defined for the regulatory test interval, e.g., by a regulatory entity. In some implementations, the sum of the energy emitted during transmission of two or more fragments may exceed the maximum energy limit defined for the regulatory test interval.

Abstract: An apparatus, method and computer program is described comprising: initialising trainable parameters of a transmission system having a transmitter, a channel and a receiver; generating training symbols on the basis of a differentiable distribution function; transmitting modulated training symbols to the receiver over the channel in a training mode; generating a loss function based on the generated training symbols and the modulated training symbols as received at the receiver of the transmission system; and generating updated parameters of the transmission system in order to minimise the loss function.

Abstract: Methods, systems, and devices for wireless communications are described. In some examples, a user equipment (UE) may receive a control message indicating a set of sampling beams defined for the UE. The UE may measure a set of received signal strengths for communications from a wireless node associated with a set of linear combinations of sampling beams from the set of sampling beams defined at the UE. The UE may calculate a set of entries of a channel covariance matrix based on the set of received signal strengths of the set of linear combinations of the sampling beams from the set of sampling beams defined for the UE. As such, the UE may communicate with the wireless node based on applying a set of beam weights to an antenna array of the UE. In some examples, the set of beam weights may be based on the channel covariance matrix.

Abstract: Devices for testing a DUT having a circuit coupled to an antenna are disclose. The device can include a DUT location, a probe, and a ground area configured to serve as an antenna ground area for the antenna of the DUT. The ground area includes a slot that the antenna feed impedance is not affected or not affected significantly. The probe is adapted to weakly couple to the antenna of the DUT via the opening to probe a signal when the antenna of the DUT is fed by the circuit of the DUT and/or in order to couple a signal to the antenna which is fed to the circuit of the DUT by the antenna.

Abstract: An antenna system can include an antenna array having a plurality of antenna elements. The antenna system can include an array controller configured to control operation of the antenna array for beam forming of the antenna array. The antenna system can include a radiofrequency circuit. The antenna system can include a transmission line coupling the radiofrequency circuit to the array controller. The transmission line can be configured to carry a radio-frequency signal to the antenna array. The radiofrequency circuit can be configured to modulate an antenna array control signal onto the radiofrequency signal to generate a transmit signal for communication over the transmission line to the array controller. The array controller can be configured to demodulate the antenna array control signal from the transmit signal such that the array controller is configured to control operation of the antenna array based at least in part on the antenna array control signal.

Abstract: Antenna monitoring systems and methods can include, among other things, a transmitter near each of the antennas in a distributed antenna system (DAS). The transmitter can transmit an antenna identifier corresponding to that antenna, so that the various transmitters in the DAS each transmit different antenna identifiers. These antenna identifiers can be detected by a receiver and can be processed to determine whether any antenna identifiers are missing. If any expected antenna identifier is missing, the receiver can infer that the antenna or a component associated with the antenna (such as cabling) may have failed. The receiver can then output an indication or notification that may be accessed by maintenance personnel and/or emergency personnel to enable them to identify and repair the non-functioning antenna or component. The transmitter can transmit other data, such as environmental data, RF data, or the like, to facilitate additional or alternative monitoring functionality.

Abstract: Methods and systems are described for measuring a vertical opening of a signal eye of a pulse amplitude modulated (PAM) signal received over a channel to determine a vertically-centered voltage decision threshold of a sampler receiving a sampling clock, determining channel-characteristic parameters indicative of a frequency response of the channel, determining a correctional vernier value from the channel-characteristic parameters, and generating a horizontally-centered voltage decision threshold that introduces a horizontal sampling offset in the sampling clock in a direction closer to a horizontal center of the signal eye by combining the vertically-centered voltage decision threshold and the correctional vernier value.

Abstract: The present disclosure provides a random access method, a terminal, and a network device. The random access method of the present disclosure comprises: receiving configuration information concerning a currently activated downlink bandwidth part (BWP) or a serving cell; detecting a random access response (RAR) in a random access procedure according to the configuration of a control resource set (CORESET) in the configuration information of the currently activated downlink BWP or the configuration information of the serving cell.

Abstract: A circuit includes a first wireless radio frequency (RF) transceiver and a time-of-flight estimator included with or coupled to the first wireless RF transceiver. The time-of-flight estimator estimates a time-of-flight between the first wireless RF transceiver and a second wireless RF transceiver using: a first interval value that indicates an amount of time between when the second wireless RF transceiver received the message and when the second wireless RF transceiver transmitted the response; a first error value that indicates an offset between when the second wireless RF transceiver sampled the message and a target sampling point for the message; a second interval value that indicates an amount of time between when the TX chain sent the message and when the RX chain received the response; and a second error value that indicates an offset between when the RX chain sampled the response and a target sampling point for the response.

Abstract: Aspects of the subject disclosure may include, for example, obtaining data regarding interference detected in a received communication signal, and performing polarization adjusting for one or more orthogonally-polarized element pairs of an antenna system such that an impact of the interference on the antenna system is minimized. Other embodiments are disclosed.

Abstract: Aspects described herein relate to scheduling, or configuring a node to schedule, a transmission in multiple time periods based on a hopping pattern, where the hopping pattern includes at least one of a beam hopping pattern, a precoder hopping pattern, or a time hopping pattern. The transmission can be transmitted or received in the multiple time periods based on the hopping pattern.

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a device, such as an internet of things (IoT) device, may include a configuration or software (e.g., in baseband) that is common for multiple applications of the device. In some aspects, the device may select a setting for at least some if not each of a set of parameters associated with or defining a device profile of the device based on an application of the device. The device may perform a mapping procedure to map the settings for the parameters associated with the device profile to one or more baseband configurations or baseband handles and the device may customize the baseband of the device using the one or more baseband configurations. As such, the device may operate or communicate using the baseband that is customized based on the device profile and application of the device.

Abstract: A system uses pulsed lasers to enhance a signal propagation path in a telecommunications network. The system can estimate a signal propagation path, which varies based on a current location of a mobile device relative to a base station. The system can detect a propagation loss due to a condition of a propagation medium including the signal propagation path and determine whether the mobile device is in Line-of-Sight (LOS) of a laser emitter. In response to detection of the propagation loss, the laser emitter can emit a pulsed laser that can enhance signal propagation by mitigating the propagation loss on the signal propagation path. The pulsed laser has a propagation path overlapping the signal propagation path when the mobile device is in LOS of the laser emitter, which is mounted on the base station.

Abstract: An antenna system is provided. In one example, the system includes a modal antenna having a driven element and a parasitic element. The system includes a radio frequency circuit. The system includes a transmission line coupling the radio frequency circuit to the modal antenna. The radio frequency circuit is configured to modulate a control signal onto an RF signal to generate a transmit signal for communication over the transmission line to the tuning circuit. The control signal can include a frame having a plurality of bits associated with the selected mode of the antenna. The radio frequency circuit is configured to encode the plurality of bits associated with the selected mode in accordance with a coding scheme. The coding scheme specifies a unique code for each mode of the plurality of modes. The unique code for each mode of the plurality of modes differs by at least two bits relative to the unique code for each other mode of the plurality of modes.

Abstract: A system and method for recovering encoded data from a modulated baseband signal is disclosed. Aspects and embodiments of the system and method include receiving an analog input signal representing a modulated baseband signal, counting clock cycles of a reference clock, detecting a first transition and a second transition of the analog input signal indicating a first change and a second change in the modulated baseband signal, storing a first counter value corresponding to an amount of clock cycles elapsed between the first transition and the second transition, and determining a binary-valued bit sequence corresponding to the first counter value.

Abstract: Described are various configurations of reduced crosstalk optical switches. Various embodiments can reduce or entirely eliminate crosstalk using a coupler that has a power-splitting ratio that compensates for amplitude imbalance caused by phase modulator attenuation. Some embodiments implement a plurality of phase modulators and couplers as part of a dilated switch network to increase overall bandwidth and further reduce potential for crosstalk.

Abstract: A contact tracking method and a related server are provided. In the method, the positioning information of multiple user equipments (UEs) is obtained. The UEs transmit wireless signals. The positioning information is determined based on the wireless signal. The wireless signal indicates a network provider identifier, a signal strength, or geolocation. The travel routes of the UEs are determined. Each travel route records the positioning information of one UE over time. The travel routes are analyzed to determine a contact situation between a first UE and a second UE of the UEs based on a contact criteria.