Abstract: Methods, systems, and devices for wireless communications are described. A network entity may obtain from a user equipment (UE), a report that indicates one or more signal quality values associated with a set of communication chains of the UE. The network entity may perform a frequency domain residual sideband (FDRSB) identification procedure to determine an FDRSB correction table associated with a set of frequency bands and the set of communication chains. The network entity may output to the UE a control message indicating the FDRSB correction table that identifies which one or more frequency bands of the set of frequency bands and which one or more communication chains of the set of communication chains are associated with FDRSB correction. The UE may demodulate one or more messages via at least one communication chain of the set of communication chains based on FDRSB correction performed using the FDRSB correction table.

Abstract: A mobile wireless receiver is provided comprising an HF input, an intermediate-frequency output, a first and second mixer, which are each operated in common mode with a frequency of a local oscillator, a first balun circuit, which is coupled to the HF input and a second balun circuit, which is coupled to the intermediate-frequency output, a first common mode trap, which is coupled to the first balun circuit and the first and second mixer and a second common mode trap, which is coupled to the second balun circuit and the first and second mixer.

Abstract: A radio frequency circuit includes power amplifiers, an input side coil and an output side coil, a filter whose pass band is a first band, a filter whose pass band is a second band, a filter whose pass band is a third band, a switch connected between ground and a path connecting one end portion of the output side coil and the filter, a switch connected between the ground and a path connecting the other end portion of the output side coil and the filter, a switch arranged in series in the path in between the switch and the filter, and a switch arranged in series in the path connecting the filter and a path connecting the switch and the switch, wherein no switch is arranged in series in the path.

Abstract: Embodiments relate to a communications node that includes an interfacing plate assembly; an antenna assembly; a board mounting assembly; a housing; and an enclosure. The housing includes the antenna assembly and the board mounting assembly. The enclosure is a rigid, open ended, sleeve structure that selectively receives the housing and thereby encloses the antenna assembly and the board mounting assembly therein. An interfacing plate assembly is positioned at a second end. The interfacing plate includes an input device coupled to the control circuit that receives user operational input. The antenna assembly includes an antenna frame that includes the antenna elements and orients the antenna elements in each nodal cardinal direction. The board mounting assembly includes the communication device and the control circuit that are positioned proximate to a plate. The plate is coupled to the first end opposite the interfacing plate and thermally coupled to the control circuit.

Abstract: An optical data transmission device for providing optical signals containing information data between avionics systems in an aircraft. A fixed optical transceiver array at a first side of a slip ring is in optical communication with a revolving optical transceiver array positioned at a second side of the slip ring. A set of mirrors coated with dielectric material are positioned at the central axis of the slip ring and configured to maintain optical communication between the optical transceiver arrays. The first mirror is fixed at the first side of the slip ring. The second mirror positioned at the second side of the slip ring rotates in concert with the second transceiver array. The mirrors are formed of a material allowing optical signals to be reflected by the mirrors while concurrently allowing a laser beam of an external system to pass through the mirrors and maintain travel along a linear axis.

Abstract: A first node receives a first signaling; transmits a first signal in a first transmission occasion in a first cell group; transmits or drops transmitting a second sub-signal in a second transmission occasion in a second serving cell. The first signaling is used to determine a first time-domain resource; transmit power of the first signal is equal to a first power value; transmit power of a second signal is equal to a second power value, and the second signal comprises the second sub-signal; whether a sum of the first power value and the second power value minus a first maximum transmit power is greater than a first threshold is used to determine whether the second sub-signal is transmitted in the second transmission occasion in the second serving cell. The above method satisfies the demands of different duplex modes for uplink transmit power.

Abstract: A system that comprises an antenna device that includes a plurality of passive patch antennas on a planar substrate and a movable frame that supports the planar substrate. The plurality of passive patch antennas is detachably coupled to a plurality of external antenna ports of a customer premise equipment (CPE). The system includes a processor that controls the CPE to switch connection of a modem of the CPE from one or more inbuilt antennas of the CPE to the plurality of passive patch antennas. The processor controls, based on an instruction from the CPE over an out-of-band control link, the movement of the movable frame to different three-dimensional (3D) position coordinates.

Abstract: Devices and methods for a detection system and heterodyne mixer having a local oscillator (LO) input, a radio frequency (RF) input, an intermediate frequency (IF) output, and a suspended waveguide structure that has a quartz substrate and patterned metal transmission line with a plurality of suppression slots.

Abstract: An electronic device according to an embodiment includes a housing including at least one opening; a support member in the housing; a display disposed on the support member; a first printed circuit board including a plurality of layers; a first wireless communication circuit disposed on a first surface of the first printed circuit board; a feeding structure on another surface of the first printed circuit board electrically connected to the first wireless communication circuit; and a waveguide configured to transmit a signal provided from the first wireless communication circuit to an outside of the housing, and the waveguide extends along one surface of the support member from the feeding structure. Other embodiments are possible.

Abstract: A method and apparatus are provided for directional communication systems in tactical environments, utilizing frequency-hopping signals to enhance low-probability-of-intercept, -detection, and -geolocation (LPI/LPD/LPG) performance; along with anti-jamming (AJ) performance, multiple access, and performance in multipath channels. Because frequency-hopping signals vary their radio frequency from dwell-to-dwell, this prevents conventional angle-of-arrival (AOA) estimation based on phase-differences. This disclosure presents a technique for AOA estimation for frequency-hopping signals with techniques for combining phase-difference measurements from multiple frequency-hopping dwells to achieve high-performance AOA estimation.

Abstract: Provided are a power amplification apparatus and a transmitter. The power amplification apparatus includes power amplification modules each including a voltage output unit and a power amplification unit; the voltage output unit outputs a first voltage signal (VIN_A) and a second voltage signal (VIN_B). The power amplification unit includes a selector (MUX), a radio frequency processing circuit, and a first switch transistor (M1), the radio frequency processing circuit processes a baseband signal to output a first radio frequency signal to a source of the first switch transistor (M1), and the selector (MUX) is configured to correspondingly strobe the first voltage signal (VIN_A) or the second voltage signal (VIN_B) according to an operating state of the first switch transistor (M1).

Abstract: A phased-array antenna system includes a substrate and a plurality of sub-arrays. Each sub-array comprises an array of patch antennas arranged on a first major surface of the substrate; a plurality of beamformer devices coupled to the array of patch antennas; a multi-channel up-down converter (UDC) and a combiner-splitter coupled to the multi-channel UDC. The combiner-splitter is configured to split a signal provided by the UDC and provide the signal to each of the plurality of beamformers and/or to combine signal provided by the plurality of beamformers and to provide the combined signal to the UDC. Each sub-array also includes an integrated device comprising the multi-channel UDC and the combiner-splitter. The integrated device and the plurality of beamformer devices is arranged on a second major surface of the substrate opposite the first major surface. The integrated device is arranged between at least two beamformer devices.

Abstract: A receiver includes: an analog front end (AFE) circuit to receive and process an incoming radio frequency (RF) signal comprising a packet; an analog-to-digital converter (ADC) to receive and digitize the processed incoming RF signal into a digital signal; a packet detector to detect the packet; an estimation circuit to determine a carrier frequency offset (CFO) estimate based at least in part on a preamble of the packet; an averager to determine a CFO average value for a plurality of packets communicated between a device pair combination of the receiver and a transmitter; and a compensation circuit to compensate for CFO between the device pair combination based at least in part on the CFO average value.

Abstract: A filter apparatus includes a dielectric substrate, input and output terminals, a ground terminal, a common electrode, and first to fourth resonators. Each resonator is connected to the common electrode and the ground terminal. Third and fourth resonators are between first and second resonators. Each resonator includes a capacitor and first and second vias connected to the common electrode. The first via is connected to the ground terminal with the capacitor interposed therebetween. The second via is directly connected to the ground terminal. In the common electrode, a direction from the first via to the second via in the first resonator is opposite to a direction from the first via to the second via in the second resonator. In third and fourth resonators, a shortest path along the common electrode between the first vias intersects with a shortest path along the common electrode between the second vias.

Abstract: Embodiments of the present disclosure provide methods and apparatus for power control. A method at a network node comprises determining a value of power back-off for a first wireless device based on at least one of a number of wireless devices including the first wireless device, wherein the wireless devices including the first wireless device are co-scheduled by the network node and an estimated max power increase in an overlap area where two or more beams are to be overlapped, wherein one of the two or more beams is for the first wireless device. The method further comprises transmitting a message or data over the beam for the first wireless device, wherein an output power of the beam for the first wireless device is controlled based on the value of power back-off for the first wireless device.

Abstract: A mounting base (14) is fixed to an antenna (13) or an antenna bracket (15) for supporting the antenna (13). A baseband unit (11) and an RF unit (12) are fixed to the mounting base (14). The baseband unit (11) fixed to the mounting base (14) is disposed to face a back part (132) of the antenna (13) and to form a space between the back part (132) and the first enclosure (111). The RF unit (12) fixed to the mounting base (14) is disposed in the space formed between the back part (132) of the antenna (13) and the baseband unit (11) and is coupled to a waveguide flange (132) of the antenna (13). Thus, for example, in a configuration of a point-to-point wireless apparatus in which an RF unit and a baseband unit are separated, restrictions on installation space of the apparatus can be facilitated.

Abstract: An asymmetrical power amplifier circuit is provided. The asymmetrical power amplifier circuit includes a carrier amplifier and a peak amplifier. The carrier amplifier is always active to amplify a radio frequency (RF) to a carrier output power, while the peak amplifier is only active to amplify the RF signal to a peak output power when a time-variant output power of the RF signal is higher than a predefined power threshold. The RF signal in the carrier output power is summed with the RF signal in the peak output power to thereby output the amplified RF signal in the time-variant output power. Unlike a conventional symmetrical power amplifier, the carrier output power and the peak output power are different at a peak of the time-variant output power. As such, the carrier amplifier and the peak amplifier can both operate with optimal efficiency based on a same modulated voltage.

Abstract: Disclosed is a technology for performing, in an electronic apparatus included in a central station, an uplink- or downlink-related operation by allocating a transmission power intensity based on a transmission and reception capability of a terrestrial terminal.

Abstract: Embodiments of the present disclosure provide methods and apparatus for power control. A method at a network node comprises determining a value of power back-off for a first wireless device based on at least one of a number of wireless devices including the first wireless device, wherein the wireless devices including the first wireless device are co-scheduled by the network node and an estimated max power increase in an overlap area where two or more beams are to be overlapped, wherein one of the two or more beams is for the first wireless device. The method further comprises transmitting a message or data over the beam for the first wireless device, wherein an output power of the beam for the first wireless device is controlled based on the value of power back-off for the first wireless device.

Abstract: A radio frequency (RF) signal strength detection technique is disclosed with a received signal strength indicator (RSSI) circuit, which can be deployed in an internet-of-things (IoT) network. The RSSI circuit is based on a direct conversion of RF to digital code indicating the signal strength. The direct conversion is achieved by the repeated switching of a rectifier's output voltage using an ultra-low power comparator. A 5-bit programmable feedback circuit can be used to correct detection inaccuracies. The RSSI circuit can be implemented in a 65-nm CMOS process and consumes 15 nW power. It can have a linear dynamic range of 26 dB and exhibit an error of ±0.5 dB with a wide bandwidth of 500 MHz. The technique has been verified with simulation and measurement results. The high detection accuracy with ultra-low power consumption of the proposed RSSI circuit is favorable for IoT applications including, e.g., biomedical, localization, and other low-power applications.