Abstract: In one embodiment, an apparatus includes: an antenna switch to receive a first radio frequency (RF) signal from a first antenna and a second RF signal from a second antenna and controllable to output a selected one of the first and second RF signals; an RF circuit to receive and process the first and second RF signals; at least one mixer to downconvert the first and second RF signals to first and second baseband signals; and an antenna diversity control circuit to receive sub-symbol portions of a first plurality of symbols of the first baseband signal and sub-symbol portions of a second plurality of symbols of the second baseband signal, and control the antenna switch to output one of the first and second RF signals, based at least in part on one or more of the sub-symbol portions of the first and second pluralities of symbols.

Abstract: An apparatus for generating a radio frequency signal is provided. The apparatus includes a modulator configured to generate the radio frequency signal based on an input signal. Further, the apparatus includes a controller configured to control the modulator to generate the radio frequency signal using polar modulation, if the input signal has a first characteristic. The controller is configured to control the modulator to generate the radio frequency signal using quadrature modulation, if the input signal has a different second characteristic.

Abstract: Systems and methods for multi-beam Channel State Information (CSI) reporting are provided. In some embodiments, a method of operation of a second node connected to a first node in a wireless communication network for reporting multi-beam CSI includes reporting a rank indicator and a beam count indicator in a first transmission to the first node. The method also includes reporting a cophasing indicator in a second transmission to the first node. The cophasing indicator identifies a selected entry of a codebook of cophasing coefficients where the number of bits in the cophasing indicator is identified by at least one of the beam count indicator and the rank indicator. In this way, feedback for both a rank indicator and a beam count indicator may be possible which may allow robust feedback and variably sized cophasing and beam index indicators.

Abstract: Disclosed are a method and a device for performing sidelink communication in a wireless communication system. Specifically, the method performed by a first terminal may comprise a step of transmitting a specific sidelink message including at least one piece of information among first information and second information to a second terminal, wherein: a transmission period of the first information is set to be longer than a transmission period of the second information; a first modulation order to be applied to the first information and a second modulation order of the second information are set differently from each other; and when the first information and the second information are concurrently transmitted through the specific sidelink message, modulation symbols of the first information and modulation symbols of the second information are mapped by considering a requirement noise ratio for each of the first modulation order and the second modulation order.

Abstract: A multipath bootstrapped sampling circuit includes a sampling capacitor, a sampling transistor interposed between the sampling capacitor and the analog input signal voltage, two bootstrap capacitors, and a bootstrap switching network periodically transitioning between a holding phase and a tracking phase. The bootstrap switching network includes a primary bootstrap path that drives only one load: the gate terminal of the sampling transistor. One or more auxiliary bootstrap paths drive other transistors in the bootstrap switching network. This absolutely minimizes the parasitic capacitance due to fan-out on the primary bootstrap path. Additionally, the provision of two (or more) bootstrap capacitors allows bulk terminals of transistors on the primary bootstrap path to be connected to an auxiliary bootstrap path, further reducing parasitic capacitance on the primary bootstrap path.

Abstract: A receiver includes a first T-coil circuit at an input of the receiver and configured to receive an input signal, a termination impedance coupled to the first T-coil circuit and configured to match an impedance of a transmission line coupled to the first T-coil circuit, and an amplifier including a first input and a second input and configured to amplify a differential signal at the first and second inputs, a calibration switch coupled to the amplifier and configured to selectively electrically connect or disconnect the first and second inputs of the amplifier, and a first receive switch configured to selectively electrically connect or disconnect a center node of the first T-coil circuit and the amplifier.

Abstract: A cloud radio access network (CRAN) system includes a baseband unit (BBU) and a radio unit (RU) remote from the BBU. The fronthaul interface between the RU and the BBU includes a radio frequency interface (RF) functionality implemented in the RU, and implementation of asymmetrical physical layer (PHY) functionality split between the BBU and RU. The asymmetrical physical layer (PHY) functionality split includes: downlink (DL) antenna port mapping and DL precoding implemented in the RU; and the split of the PHY functionality for uplink (UL) at the antenna port mapping in the BBU. For the DL, precoding and resource element (RE) mapping to frequency resources is implemented in BBU, and RE mapping for antenna ports is implemented in the RU|[WA1]. The split also provides support for license-assisted access (LAA) in the CRAN system.

Abstract: In one embodiment, a distributed antenna system comprises: at least one master unit; at least one remote antenna unit communicatively coupled via a switch to the master unit by a primary cable and a secondary cable both coupled to the switch, the remote antenna unit comprising a compensating link check module that outputs a control signal to the switch, wherein the switch selects between the primary and secondary cable in response to the control signal; wherein the compensating link check module controls the switch to momentarily select the secondary cable to perform a link check during which the remote unit measures a quality metric of a downlink signal received via the secondary cable; and upon initiation of the link check, the compensating link check module adjusts an attenuation of the downlink signal received on the secondary cable by loading calibration settings for the secondary cable into a compensation attenuator.

Abstract: A beamforming transmission device includes a control unit, at least one radio frequency unit, and at least one signal transmission unit. The control unit is configured to receive a radio frequency signal and channel state information of at least two pieces of user equipment, and to generate a control signal according to the radio frequency signal and the channel state information of the at least two pieces of user equipment. The radio frequency unit is coupled to the control unit. The radio frequency unit is configured to receive the control signal and generate a beamforming signal according to the control signal. The signal transmission unit is coupled to the radio frequency unit. The signal transmission unit is configured to transmit the beamforming signal to the at least two pieces of user equipment.

Abstract: An OAM multiplexing transmission device includes a unit generating each of the transmission streams in a baseband (BB), in which a channel estimation signal sequence is disposed before a transmission target data signal sequence, and a CP having a predetermined length is disposed in the first half of the channel estimation signal sequence, the channel estimation signal sequence is time-shifted with a channel estimation signal sequence (a basic channel estimation signal sequence) having a predetermined length and a zero correlation, by a predetermined shift value for each of the transmission streams; a unit converting a baseband signal sequence of the generated transmission streams to frequency conversion into RF band, or converting into IF band and then converting into the RF band; and a unit converting a plurality of the frequency-converted transmission streams into a plurality of OAM mode signals having different orders, and multiplexing spatially by using the UCA.

Abstract: Apparatus and associated methods relate to implementing an analog auxiliary clock and data recovery (CDR) path to provide a high bandwidth CDR in a transceiver that supports both PAM4 and NRZ signaling. In an illustrative example, the auxiliary CDR path may include a phase-frequency detector (PFD)-based phase-locked loop (PLL) and a phase detector (PD)-based PLL. When the PFD-based PLL is locked to a reference clock signal of the transceiver, the PFD-based PLL may be then disabled and the PD-based PLL may be then enabled. Implementing the auxiliary CDR path may advantageously enable the transceiver to implement much larger parts per million (ppm) acquisition and tracking, and thus enable the transceiver to advantageously support new standards such as Peripheral Component Interconnect Express (PCIe) 5.0 and PCIe 6.0, for example.

Abstract: A mesh network comprises a controller and a plurality of mesh-networked devices, operable to communicate with the controller. The controller and the plurality of mesh-networked devices comprise timing units, and are operable to communicate in accordance with a frequency hopping sequence. The mesh-networked devices switch between a transmit mode, in which they are capable of transmitting messages to one or more other mesh-networked device and/or the controller and an inactive mode, in which they are unable to transmit to or receive messages from one or more other mesh-networked devices or the controller. The timing units of the mesh-networked devices are synchronised and the mesh-networked devices are operable to switch to the transmit mode at pseudorandom time intervals.

Abstract: An active optical machine-readable tag that is addressable and readable within a line-of-sight of a reader device equipped with a camera, at substantially large distances. The active optical tag and the camera-based reader may use a method of asynchronous communication reducing the flicker associated with the low-frequency optical carrier to a level hardly noticeable by people. The method of transmitting data may include determining length of a repetitive time period not longer than time resolution of a human eye, emitting a first sequence of light pulses within the time period, the light pulses including pulses of complementary colors and pulses of different levels of luminosity; and determining the order of the colors and levels of luminosity of the first sequence of light pulses emitted within the time period to represent a symbol, and to achieve perceived chromaticity and luminosity that is substantially constant to a human eye.

Abstract: This disclosure provides systems, methods and apparatus for improved antenna selection diversity and audio quality. In one aspect, wireless audio devices, such as wireless earbuds, may provide link quality information and timestamps to a source device, which may use such information to select which antenna to use for a subsequent transmission.

Abstract: A device includes a receiver having analog front-end circuitry and a digital signal processing (DSP) circuit. The DSP circuit is configured to select one of a plurality of digital equalization (DEQ) filter options and to perform DEQ operations based on the selected DEQ filter option, wherein the DSP circuit is configured to select one of the plurality of DEQ filter options based on a channel length estimate and a plurality of different sets of DEQ filter coefficients predetermined for different channel lengths.

Abstract: A method for recovering a clock signal from an input signal is disclosed. The method comprises the following steps: An input signal that comprises a symbol sequence having symbol edges is received. Edge timings of the symbol edges are determined, thereby generating an edge signal, the edge signal comprising information on the edge timings. The edge signal is processed via a filter module comprising a time variant filter, thereby generating the clock signal, the clock signal comprising information on at least one clock timing parameter. Further, a clock recovery module and a computer program are disclosed.

Abstract: Precoder weights can be indicated to a carrier unit to increase network efficiency. To indicate precoder weights to the carrier unit, various types of precoding data can be used to schedule user equipment. For example, a baseband unit can compress precoding coefficients for channel state information reference signals for a remote radio unit and for a demodulation reference signal (DMRS) to reduce a signaling cost between the remote radio unit and the baseband unit. Because both the baseband unit and the remote radio unit can have access to the basis vectors the basis vectors can be multiplied by coefficients to transmit the compressed weight of the basis vectors. Thus, allowing the remote radio unit to reconstruct the basis vector for the channel state information reference signals.

Abstract: The disclosure provides for a system that includes a network controller. The network controller is configured to receive information from nodes of a network, where nodes include one node that is in motion relative to another node. The network controller is also configured to generate a table representing available nodes and possible links in the network based on the information, and determine a topology of the network based on the table. Additionally, the network controller is configured to receive client data information from a client device, and determine flows for the topology based on the client data information. Each flow includes one or more requirements for a routing path through the network. The network controller is configured to generate a network configuration for the topology based on the flows, and send instructions to the nodes of the network for implementing the network configuration and transmitting client data.

Abstract: Methods for processing an OFDM radar signal are provided. A plurality of Nc×NDS receive samples corresponding to a number of NDS consecutive OFDM symbols is received, each OFDM symbol comprising a plurality of Nc subcarriers modulated with a respective modulation symbol. Each of the plurality of Nc×NDS receive samples is divided by its respective modulation symbol to generate a number of NDS processed OFDM symbols. The number of NDS processed OFDM symbols is decimated to generate at least one decimated OFDM symbol. A first type discrete Fourier transform (e.g. IFFT) of the at least one decimated OFDM symbol is performed to generate at least one first transformed vector.

Abstract: Improving a status of a wireless signal includes a display, a wireless transceiver, a processor and memory to monitor a status of a wireless signal of the wireless transceiver and a Basic Input Output System (BIOS) to, in response to the status indicating a degradation of the wireless signal and receiving a command to improve the status of the wireless signal, modify a parameter of an enhanced display port (eDP) signal of the display to reduce interference with the wireless signal generated by the display of the computer.