Abstract: Apparatuses, methods, and systems for calibrating an antenna array are disclosed. One method includes selecting an antenna element of a first antenna subarray and an antenna element of a second antenna subarray, transmitting the signal through the at least one antenna element of the first subarray having a first selected phase, transmitting the signal through the at least one antenna element of the second subarray having a second selected phase, and characterizing a relative phase offset between the antenna element of the first antenna subarray and the antenna element of the second antenna subarray, including adjusting the first selected phase or the second selected phase, and monitoring a receive signal received at a calibration antenna that includes the transmitted signal of the at least one antenna element of the first antenna subarray and the transmitted signal of the at least one antenna element of second antenna subarray.

Abstract: In a case where wireless connection to a device fails because the number of terminals in wireless connection with the device has reached a maximum number, a communication apparatus instructs the device to stop operating in a direct wireless communication mode.

Abstract: A radio station communicates control information for multipoint cooperating communication, in which a plurality of radio stations takes part in data transmission/reception of a terminal, with another radio station taking part in the multipoint cooperating communication and/or a control station that manages the radio station.

Abstract: A hybrid MOS-PCM IC switch utilizes both MOS transistors and groups of parallel-connected Phase-Change Material (PCM) cells to control signal transmissions. The MOS transistors are separated by PCM cell groups, and the PCM cells are configured to generate similar COFF or lower values as the MOS transistors, whereby the hybrid switch is both smaller and exhibits lower FOM than standard CMOS SOI switches. When switched into an open (OFF/high-resistance) state, both the PCM cells and MOS transistors function to distribute high VBSR voltages, and the MOS transistors prevent unintended phase changes (ON/OFF switching) of the PCM cells by preventing exponential current flow. In the closed (ON/conducting) state, the PCM cells facilitate lower total RON, whereby the hybrid CMOS SOI switch achieves improved FOM. The MOS transistors may also function as drivers during programming (switching) of direct-heating-type PCM cells.

Abstract: A method is provided that comprises tuning a radio system to a frequency band that contains a locally-broadcast terrestrial radio signal. The locally-broadcast terrestrial radio signal comprising a main signal component and a side data component is thereby received. In response to receiving the locally-broadcast terrestrial radio signal a determination is made as to a permissible time for processing the side data component using a time slot schedule. The side data component is processed at the permissible time. A message corresponding to the side data component is outputted to an output device. In some instances, the side data component includes the message. In other instances, the method further includes searching a message lookup list using a code included in the side data component. When a stored code is found that matches the code, the message corresponding to the matching stored code is outputted.

Abstract: An amplifier architecture can include an input circuit for splitting a signal into first and second portions, and carrier and peaking amplification paths for receiving the first and second portions. The architecture can further include an output circuit having a balun transformer circuit with first and second coils, with the first coil between first and second ports, the second coil between third and fourth ports, the first and third ports coupled by a first capacitance, and the second and fourth ports coupled by a second capacitance. The first port can receive a first signal from the carrier amplification path, and the fourth port can receive a second signal from the peaking amplification path. The second port can provide a combination of the first signal and the second signal as an amplified signal. A termination circuit can be provided to couple the third port to a ground.

Abstract: Provided are a method for communicating in a wireless communication system and a device using the same. A wireless device receives a switching command instructing the switching between a clear channel assessment (CCA) operation and a non-CCA operation in an unlicensed band. According to the switching command, the wireless device performs the CCA operation or the non-CCA operation in the unlicensed band.

Abstract: There is provided automatic gain control of radio chains of a receiver. At least two radio frequency (RF) signals are received. Each RF signal is received on an individual radio chain from an antenna array. By comparing the at least two RF signals to a threshold it is determined whether to perform gain control or not of at least one of the at least two RF signals before analog combining of the at least two RF signals. A notification is sent to a detector regarding whether gain control is performed or not. Analog combining of the at least two RF signals is performed, thereby generating a single input to the detector.

Abstract: In accordance with an embodiment, a Radio Frequency (RF) front end system includes a first chip that includes a frequency multiplier coupled to a first input terminal. The frequency multiplier is configured to form an upscaled reference signal by upscaling in frequency an oscillating reference signal received at the first input terminal. The first chip also includes a Voltage-Controlled Oscillator (VCO) configured to provide a first oscillating VCO signal, and an oscillator switch coupled to the VCO and the frequency multiplier. The oscillator switch is configured to select a Local Oscillator (LO) signal from between the first oscillating VCO signal and the upscaled reference signal. The first chip also includes a first phase shifter coupled to an output of the oscillator switch, and a modulator having an input coupled to an output of the first phase shifter.

Abstract: An electronic device includes a board having a first surface on which a heating element is mounted, a heat sink plate disposed to face the first surface of the board, and a heat pipe disposed between the board and the heat sink plate such that one end of the heat pipe is disposed at a position where the one end is in contact with the heating element, and the other end of the heat pipe is disposed to be in contact with the heat sink plate, wherein the heat sink plate has a stacking structure of a first heat sink plate of which a front surface faces the board, and a second heat sink plate disposed on a rear surface of the heat sink plate, and a through hole is formed at a position on the first heat sink plate.

Abstract: An analog predistorter (APD) core module including a radio frequency delay module, an envelope module, and a contact matrix module. The radio frequency delay module is configured to receive a feed-forward radio frequency signal, generate multiple radio frequency delay signals with different delays according to the feed-forward radio frequency signal, and output each radio frequency delay signal to the contact matrix module. The envelope module is configured to receive the feed-forward radio frequency signal, perform envelope detection on the feed-forward radio frequency signal to obtain multiple envelope signals with different delays, and output each envelope signal to the contact matrix module. The contact matrix module is configured to receive each radio frequency delay signal, each envelope signal, and a predistortion coefficient from an exterior source, and generate a predistortion signal according to the predistortion coefficient, each radio frequency delay signal, and each envelope signal.

Abstract: A method determines far field EVM of a DUT using over-the-air (OTA) testing, the DUT having a transmitter/receiver and an antenna that are integrated together such that there is no connection port for interfacing a test system for directly measuring the EVM. Modulated RF signals transmitted by the DUT propagate OTA via the antenna. The method includes performing a near field scan of a bounded radiation surface, which includes measurement points at which waveforms of a repeatedly transmitted modulated RF signal are measured; downconverting the waveforms to intermediate frequency (IF), and digitizing the IF waveforms; synthesizing digital waveforms corresponding to the IF waveforms; accounting for corresponding RF propagation in the far field for the digital waveforms; providing a modulated digital IF waveform using the digital waveforms for which RF propagation has been accounted; and calculating EVM of the DUT in the far field using the modulated digital IF waveform.

Abstract: Methods, apparatus, systems and articles of manufacture (e.g., physical storage media) to verify radio station watermarking with software defined radios are disclosed. Example methods disclosed herein to verify watermarking of radio station broadcasts include calibrating a notch filter to attenuate a first radio station broadcast signal. Disclosed example methods also include tuning a software defined radio to demodulate a second radio station broadcast signal from an output of the notch filter, the second radio station broadcast signal different from the first radio station broadcast signal. Disclosed example methods further include processing, with a watermark decoder, audio data resulting from the tuning of the software defined radio to verify watermarking of the second radio station broadcast signal.

Abstract: A calibration system, in a receiver chip, receives a plurality of receive signals at a plurality of receive paths. A first receive path and a second receive path is selected for a first receive signal and a second receive signal, respectively. A first signal parameter of the second receive signal is adjusted relative to the first signal parameter of the first receive signal to maximize a first signal strength value of an added signal or minimize a second signal strength value of a subtracted signal. Based on the adjusted first signal parameter, an offset of the first signal parameter is calibrated. Further, based on a matching of the second signal parameter in the second receive path relative to the second signal parameter in the first receive path, value of the second signal parameter is calibrated.

Abstract: Systems, devices and methods related to multi-band power amplifier. In some embodiments, a power amplifier module includes a power amplifier having an output stage and configured to receive a signal. The power amplifier module also includes a first programmable harmonic termination circuit in electrical communication with the output stage of the power amplifier. The first programmable harmonic termination circuit includes a first plurality of capacitors and a first plurality of switches, with at least one of the first plurality of capacitors being in electrical communication with at least one of the first plurality of switches. The power amplifier module further includes a controller configured to modify a configuration of the first plurality of switches of the first programmable harmonic termination circuit based at least in part on a second harmonic frequency of the signal.

Abstract: An antenna switching system includes a first antenna, a second antenna, a first sensing unit, a second sensing unit, a controlling unit, and a switching unit. The first sensing unit detects a distance between an object and the first antenna. The second sensing unit detects a distance between the object and the second antenna. The controlling unit is electronically connected to the first sensing unit and the second sensing unit. The switching unit is electronically connected to the controlling unit, the first antenna, and the second antenna. The controlling unit is configured to activate and deactivate the first antenna and the second antenna via the switching unit based on detections of the first sensing unit and the second sensing unit.

Abstract: A constellation of satellites form a communication system that includes communication between satellites and ground terminals as well as communication between satellites. The inter-satellite communication is implemented via wireless network comprising a first set of rings in a first orientation and a second set of rings in a second orientation. Each ring of the first set of rings and the second set of rings comprises two ringlets transmitting in opposite directions. Each satellite of the plurality of satellites is configured to communicate in a ring of the first set of rings and communicate in a ring of the second set of rings.

Abstract: A portable millimeter-wave wireless communications device relies on millimeter-wave spectrum for wireless communications. The millimeter-wave device may be a smart-phone, a laptop computer or a tablet computer. The millimeter-wave device may be a module that is added to an existing portable device such as a smart-phone, a laptop computer or a tablet computer to provide millimeter-wave communications capability. The module may be incorporated into a protective encapsulating case of such portable devices.

Abstract: A transmitting circuit includes a serializer that converts parallel data into serial data based on a clock signal, a driver that generates differential signals based on the serial data, and a clock buffer that provides the clock signal to the serializer. In a standby state, the clock buffer cuts off the clock signal and the serializer outputs the serial data according to a reset signal such that standby differential signals indicating the standby state are generated by the driver irrespective of the clock signal.

Abstract: Disclosed embodiments relate to a system that changes transmitter and/or receiver settings to deal with reliability issues caused by a predetermined event, such as a change in a power state or a clock start event. One embodiment uses a first setting while operating a transmitter during a normal operating mode, and a second setting while operating the transmitter during a transient period following the predetermined event. A second embodiment uses similar first and second settings in a receiver, or in both a transmitter and a receiver employed on one side of a bidirectional link. The first and second settings can be associated with different swing voltages, edge rates, equalizations and/or impedances.