Abstract: An antenna unit for monitoring the RF transmission line and RF signal path to an antenna unit used in a distributed antenna system. The antenna has a resistor connected to ground, and a DC injector including a capacitor having a first side connected to an RF transmission line and a second side connected to the antenna, with a first inductor coupled between the resistor and the monitoring module.

Abstract: According to one embodiment, an antenna device includes a branch circuit, a first phase shifter, a second phase shifter and a radiating element. The branch circuit divides an input signal and generates a first signal and a second signal. The first phase shifter is capable of shifting a phase of the first signal. The second phase shifter is capable of shifting a phase of the second signal. The radiating element transmits a right-hand circularly polarized wave based on a first output signal of the first phase shifter and transmits a left-hand circularly polarized wave based on a second output signal of the second phase shifter.

Abstract: A wireless communications antenna includes a first coil including first conductive patterns disposed on a first layer along a first axis and a second coil including second conductive patterns disposed on a second layer along a second axis having a direction different from a direction of the first axis.

Abstract: Methods, apparatus, systems and articles of manufacture to verify radio station watermarking with software defined radios are disclosed. Example apparatus disclosed herein include a notch filter having a bandwidth and a center frequency corresponding to a first radio station broadcast signal, and a software defined radio front-end to downconvert a radio frequency band to a baseband signal, the radio frequency band including a second radio station broadcast signal different from the first radio station broadcast signal. Disclosed example apparatus also include a software defined radio application to tune to a portion of the baseband signal corresponding to the second radio station broadcast signal and to demodulate the portion of the baseband signal to generate audio data corresponding to the second radio station broadcast signal. Disclosed example apparatus further include a watermark decoder to detect a watermark in the audio data corresponding to the second radio station broadcast signal.

Abstract: A method for detecting oscillation in a signal coupling device includes at least one oscillation detection step. The oscillation detection step includes the steps of determining an undamped signal level of a signal on a signal path of the signal coupling device in a first step, reducing a gain of the signal path in a second step, and determining a damped signal level of the signal on the signal path and a deviation between the undamped signal level and the damped signal level at least once in a third step. An oscillation is detected if at least one deviation determined in the third step of the at least one oscillation detection step is higher than or equal to a predetermined oscillation threshold value. A device for detecting oscillation in a signal coupling device and a signal coupling device are also provided.

Abstract: The present 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). A method of operating a base station for interference cancellation in a wireless communication system is provided. The method may include receiving, from a target terminal, an uplink data signal including at least one interference signal generated by at least one interference terminal; performing a primary decoding for the uplink data signal; in accordance with decoding errors, generating a cancelling signal corresponding to an interference signal of the at least one interference terminal; performing a cancellation by applying the cancelling signal to the uplink data signal; and performing a secondary decoding for the uplink data signal to which the cancelling signal has been applied.

Abstract: A semiconductor device includes a semiconductor chip. The semiconductor chip includes: a switching-type DC-DC converter; a pad for receiving a high frequency signal from an antenna; a balun connected to the pad and configured with a coil to output a differential signal based on the high frequency signal; an internal circuit driven by an output voltage of the DC-DC converter to process the differential signal output from the balun; and a ground voltage line that couples the internal circuit to a ground voltage source. The ground voltage line includes a first partial ground voltage line, and a second partial ground voltage line arranged to face the first partial ground voltage line with the balun interposed therebetween.

Abstract: A protective cover for a tablet computer is disclosed, which comprises a back cover and a front cover. The front cover includes an input side and a connector including a planar portion and a coupler for removably connecting the front cover to the back cover. The planar portion engages at least portion of a front surface of the tablet computer and the coupler engages an edge of the back cover.

Abstract: At least one communication service for transmitting and/or receiving information associated with the communication service utilizes at least one of several antennas in a motor vehicle. An antenna circuit, associated with each of the antennas, converts an analog signal received by the antenna into digital received data associated with that antenna circuit and/or converts digital transmission data associated with that antenna circuit into an analog transmission signal which is supplied to the associated antenna. A communication device in the motor vehicle generates transmission data associated with the antenna circuits in accordance with transmission information and transfers the transmission data to the associated antenna circuit and receives the digital received data from at least one of the antenna circuits to provide reception information based on the digital received data.

Abstract: A passive intermodulation detection system is provided to remotely identify passive intermodulation at a base station site and diagnose the type of intermodulation and location of the non-linearity that is the source of the passive intermodulation. A passive intermodulation cancelation system can generate an equivalent signal to a received interference signal and use the equivalent signal to generate an error signal. The error signal can then be used to reinforce a learning system and converge on a steady state of the interference signal to cancel other interference signals.

Abstract: A calibration system, in a transmitter chip, selects a first transmit path for a first transmit signal and a second transmit path for a second transmit signal. The plurality of transmit paths are associated with a plurality of antenna elements. A first signal parameter of the second transmit signal is adjusted relative to the first signal parameter of the first transmit signal to maximize a first signal strength value of an added signal or minimize a second signal strength value of a subtracted signal. An offset of the first signal parameter is calibrated based on the adjusted first signal parameter in the second transmit path. A value of a second signal parameter is calibrated based on a matching of the second signal parameter in the second transmit path relative to the second signal parameter in the first transmit path.

Abstract: A system is provided in which a set of modules each have a substrate on which is mounted a radio frequency (RF) transmitter and/or an RF receiver. Each module has a housing that surrounds and encloses the substrate. The housing has a port region on a surface of the housing. Each module has a tapered near field communication (NFC) field confiner located between the substrate and the port region on the housing configured to guide electromagnetic energy produced by the RF transmitter to the port region so that it can be emanated to a port region of an adjacent module.

Abstract: An antenna allocation method and a terminal for modems to receive a signal with a good antenna includes allocating a first antenna to a first modem; and if it is determined that the first modem satisfies a preset state, allocating the first antenna to any one of N?1 modems other than the first modem.

Abstract: A holster (100) formed a body wearable housing (102), a cable (120), and a holster antenna (104) provide retention for a portable communication device (202) along with remote antenna coverage to another portable communication device (302) via the holster antenna (104).

Abstract: The present disclosure includes embodiments of a two-way wireless data communication system and associated methods. An embodiment of a system can include a network operations center (NOC), a plurality of fixed-location receive base stations (RBS) in communications with the NOC, and an intelligent shortwave communication network in communications with the NOC and the plurality of RBS and including a plurality of remote intelligent transceiver units (ITU). In an embodiment, for example, the NOC can be operative to a) compute rapidly a protocol under which nationwide communications is to be completed via coordinated operations of the linked ITU and RBS, b) determine propagating and clear electromagnetic wavelengths over an entire 3 MHz to 30 MHz shortwave band, and c) send a continuous stream of data indicating times and frequencies at which remote units can rapidly and efficiently transmit data and at which antenna sites can reliably and efficiently receive that data.

Abstract: In an example, a method includes: in a first mode, causing a first tuner of an entertainment system to receive and process a first RF signal from a first antenna configured for a first band to output a first audio signal of a first radio station and causing a second tuner of the entertainment system to receive a second RF signal from a second antenna configured for the first band to determine signal quality metrics for one or more radio stations of the first band; in a second mode, causing the first tuner to output a first signal representation of the first RF signal and causing the second tuner to receive and process the second RF signal to output a second signal representation of the second RF signal; and causing a phase diversity combining circuit to process the first and second signal representations to output an audio signal of the first radio station, without disruption of output from the entertainment system of a broadcast of the first radio station.

Abstract: First vibration data is generated using first operation data corresponding to an operation on a direction input unit, and second vibration data is generated using second operation data corresponding to an operation on a press button. Then, a first vibrator of a first operation device is vibrated in accordance with the first vibration data, and a second vibrator of a second operation device is vibrated in accordance with the second vibration data.

Abstract: The present invention discloses a low power supply voltage double-conversion radio frequency receiving front end, which can work at a lower power supply voltage in a passive frequency conversion mode; a first frequency conversion unit and a second frequency conversion unit of the front end are directly cascaded, and a second orthogonal passive frequency conversion shifts a low input impedance of a transimpedance amplifier to an intermediate frequency, so as to construct a band-pass filtering function for radio frequency current; and the radio frequency current which has undergone two frequency conversions is converted into an output intermediate frequency voltage via the transimpedance amplifier. Compared with the traditional active+active or active+passive double conversion mode, the present invention omits intermediate-stage active circuits and filtering circuits, thereby saving power consumption and layout area, and realizing sufficient rejection on an image signal while ensuring a high conversion gain.

Abstract: Methods and apparatus for communicating transmission backlog information are described. Reporting control factors are utilized to expand reporting possibilities for a fixed bit size request report. At least one report control factor is determined as a function of channel quality information, power information, device capability information, and/or quality of service information. A transmission backlog report value is interpreted as a function of a reporting control factor. A wide range of quantization schemes for reporting transmission backlog information are facilitated corresponding to a small bit size report. A communications device can adaptively select a quantization request level closely matched to its current needs such as to provide an accurate representation of its current traffic channel resource needs.

Abstract: A method and system for providing power to a chargeable device via radio frequency link are provided. In one aspect, a method of providing power to a chargeable device via radio frequency link comprises generating a substantially unmodulated signal. The method further comprises radiating a substantially unmodulated radio frequency (RF) signal to the chargeable device via a transmit antenna based on the substantially unmodulated signal. The method further comprises powering or charging the chargeable device with power delivered by the substantially unmodulated RF signal.