Abstract: A magnetic field transmitter, especially a transmitter used in conjunction with wireless communications earplugs. In one embodiment, a plate of magnetic material is used behind a coil of electrical conductor to improve the efficiency of the transmitter and to provide electrical and magnetic shielding. The specific dimensions and characteristics of the preferred embodiment of the transmitter described herein provide for efficient wireless communications.

Abstract: Provided is a contactless power supplying system which is efficient and can be built of small coils by appropriately limiting power to be inputted into a transmitting coil. In the contactless power supplying system, power transmitted from a transmitting coil is received by a receiving coil by means of magnetic coupling, and the contactless power supplying system includes a power control unit configured to cause power from a power source to flow through the transmitting coil and a control unit configured to perform power limiting control of limiting the power flowing through the transmitting coil by controlling the power control unit.

Abstract: A power supply for a radio frequency (RF) power amplifier that amplifies an RF input signal into an RF output signal and a method of operation in the power supply. The power supply comprises a first power converter to convert an input voltage to the power supply into a first supply voltage of the RF power amplifier. The power supply comprises a second power converter to receive the input voltage and the first supply voltage and to selectively convert either the input voltage or the first supply voltage into at least a portion of a second supply voltage of the RF power amplifier.

Abstract: The present invention relates to a display device and a method of operating the display device that reduces power consumption, the method including: operating the display device in a normal driving mode to display an image on a display panel according to an image data signal; operating the display device in a sleep mode, by adjusting a clock signal and an image data signal transmitted from a set controller to of the display device to a first voltage; measuring a sleep mode time period during which the display device operates in the sleep mode; and adjusting a register value of the set controller when the measured sleep mode time period exceeds a first reference time period and maintaining the clock signal at a second voltage according to the adjusted register value as a clock-off mode.

Abstract: The invention provides a method for processing signals in a radio transmission apparatus (60) and a radio transmission apparatus (60) comprising a plurality of radio transmitters (61, 62), wherein clipping is applied to a signal in at least one of the plurality of radio transmitters, wherein the amount of clipping or/and a clipping threshold is adjusted individually for each of the plurality of radio transmitters.

Abstract: An alarm system for power supply includes a power supply unit, an electronic device, a control unit, and a switch unit. The power supply unit includes a battery. The battery outputs a power supply voltage. The power supply receives a standby DC voltage, and outputs a first voltage level signal according to the standby DC voltage and the power supply voltage. The electronic device outputs a second voltage level signal. The control unit receives the first voltage level signal and the second voltage level signal, and outputs a control signal in accordance. The switch unit receives the control signal, and sounds alert when there is no electric charge in the battery.

Abstract: The present disclosure provides a device (300) of crest factor reduction for a multi-carrier signal. The device (300) includes: a peak detector (320) adapted to receive a sampled representation of the multi-carrier signal, detect a peak from the sampled representation and obtain a value and a time domain location of a cancellation peak for cancelling the peak; a plurality of peak cancellation signal generators (330) each corresponding to a carrier of the multi-carrier signal and adapted to generate a peak cancellation signal within a frequency band of its corresponding carrier based on the value and time domain location of the cancellation peak; and a subtractor (350) adapted to subtract the peak cancellation signals from the sampled representation after being delayed. The present disclosure also provides another device of crest factor reduction, a multi-stage crest factor reduction circuit and a peak detector.

Abstract: A communication unit comprises a radio frequency, RF, transmitter comprising: a power amplifier, PA, module; an envelope tracking system operably coupled to the PA module and arranged to variably control a supply voltage for the PA module; and a load control system operably coupled to an output of the PA module and arranged to control a power amplifier output load.

Abstract: In some aspects, a plurality of frames to be transmitted is assembled. The averaging factor is determined for each frame. Each frame is transmitted with the averaging power determined for each frame and not with the worst case averaging power from the plurality of frames.

Abstract: An information processing apparatus includes: a communication unit that performs wireless communication with an external apparatus; a first control unit that switches between a normal state and a low electric power consumption state that suppresses electric power consumption to less than the normal state; and a second control unit that operates at lower electric power consumption than the first control unit, in which the information processing apparatus controls a connection state of the communication unit with the first control unit and the second control unit, based on a state of the information processing apparatus.

Abstract: A method of controlling power of a physical layer device of a base station in a mobile communication system which is applied to a fifth generation (5G), that is the next generation, mobile communication system and makes it possible to efficiently control the power of physical layer devices managing each beam spot, such as a radio frequency (RF) module and a modem, according to the number of pieces of user equipment (UE) or an amount of traffic processed by the beam spot. The method is applied to a mobile communication system including a plurality of media access control processing units (MACs) corresponding to a plurality of modems on a one-to-one basis and the plurality of modems each connected with one or more RF modules covering beam spots dividing a base station cell.

Abstract: Disclosed is an uplink power control method, which is used for realizing power control over uplink channels with different uplink transmission times so as to ensure that the total transmit power of terminal equipment in a sub-frame does not exceed maximum transmit power and that a system can work normally.

Abstract: Exemplary embodiments are related to enhancing power efficiency of an electronic device. A device may include a power management module and a radio-frequency (RF) module coupled to the power management module. The device may further include a digital module coupled to each of the power management module and the RF module and configured to dynamically adjust at least one setting of the power management module based on one or more RF conditions.

Abstract: Circuits, devices and methods related to combiners for Doherty power amplifiers. A signal combiner can include a balun transformer circuit having a first coil and a second coil. The first coil can be implemented between a first port and a second port. The second coil can be implemented between a third port and a fourth port. The first port and the third port can be coupled by a first capacitance. The second port and the fourth port can be coupled by a second capacitance. The first port can be configured to receive a first signal. The fourth port can be configured to receive a second signal. The second port can be configured to yield a combination of the first signal and the second signal. The signal combiner can include a termination circuit that couples the third port to a ground.

Abstract: An NFC initiator device requests a passive communication mode by modulating a request onto a first carrier signal. In response thereto, the target device transmits a second carrier signal while still receiving the first carrier signal from the initiator device. The target device may modulate data onto the second carrier signal to convey information to the initiator device. The initiator device may detect changes in the load provided by the target device to interpret the data conveyed by the target device.

Abstract: A method and apparatus for controlling transmit power of a User Equipment (UE) in a mobile communication system is provided. The transmit power control method of the present invention includes determining, when the terminal's required transmit power exceeds the terminal's maximum transmit power, whether a plurality of Hybrid Automatic Repeat reQuest (HARQ) processes are running and reducing, when the plurality of HARQ processes are running, a transmit power of at least one of the plurality of HARQ processes which has not experienced transmit power reduction previously. The UE transmit power control method and apparatus of the present invention is advantageous to control the transmit power in transmit power reduction mode.

Abstract: A voltage reference circuit implemented in GaAs to provide an output voltage component proportional to absolute temperature is described herein. The various embodiments of the voltage reference circuit described here can be used to provide precision voltage to bias a RF device. The voltage reference circuit can be provided on the same die as the RF device. The various embodiments described herein can be implemented in a GaAs material system.

Abstract: Radio frequency (RF) amplification devices are disclosed that include Doherty amplification circuits and control circuits along with methods of operating the same. In one embodiment, the Doherty amplification circuit includes a quadrature coupler having an isolation port and a tunable impedance load coupled to the isolation port and configured to provide a tunable impedance. The control circuit is configured to tune the tunable impedance of the tunable impedance load at the isolation port dynamically as a function of the RF power of the Doherty amplification circuit. In this manner, the control circuit can provide dynamic load modulation, thereby increasing the power efficiency of the Doherty amplification circuit, particularly at backed-off power levels. The load modulation provided by the control circuit also allows the Doherty amplification circuit to provide broadband amplification in various RF communication bands.

Abstract: There is provided a method of handling interference caused by inter-modulation in a network node. The method comprises detecting an interference level on an uplink carrier frequency band for stations, and determining whether the interference level indicates probable inter-modulation interference. If the interference level indicates probable inter-modulation interference, the method proceeds with scheduling an uplink transmission grant for at least one of the stations. The uplink transmission grant is valid for a first transmission time interval. The uplink transmission grant is transmitted to the station. A transmit level on the downlink carrier frequency band is assigned at the first transmission time interval such that inter-modulation interference is reduced on the uplink carrier frequency band at the first transmission time interval. An uplink transmission from the station is received at the first transmission time interval.

Abstract: User activity on a mobile device is monitored and collected, and a resource usage model is constructed. The resource usage model describes a set of contexts in which the mobile device, and is the basis for determining a first exhaustion point for a resource. Based on the monitored activity, a prediction of a second exhaustion point for the resource time is made. If the second exhaustion point is prior to the first exhaustion point, usage of the resource is reduced.

Abstract: A radio terminal UE according to one embodiment includes a radio communication unit 210 configured to receive a plurality of parameters including a first parameter for high-speed movement and a second parameter for non-high-speed movement as parameters for processing for switching to a neighboring base station from a base station connected to the radio terminal, and a controller 260 configured to acquire movement speed information indicating a movement speed of the radio terminal and to select a parameter corresponding to the movement speed information. The first parameter is configured to inhibit processing for switching to a Pico base station PeNB which is included in the neighboring base stations.

Abstract: A method and apparatus for performing transmit (Tx) power control in a convergence network of a plurality of communication systems.

Abstract: Radio frequency (RF) amplification devices are disclosed that include Doherty amplification circuits and control circuits along with methods of operating the same. In one embodiment, the Doherty amplification circuit includes a quadrature coupler having an isolation port and a tunable impedance load coupled to the isolation port and configured to provide a tunable impedance. The control circuit is configured to tune the tunable impedance of the tunable impedance load at the isolation port dynamically as a function of the RF power of the Doherty amplification circuit. In this manner, the control circuit can provide dynamic load modulation, thereby increasing the power efficiency of the Doherty amplification circuit, particularly at backed-off power levels. The load modulation provided by the control circuit also allows the Doherty amplification circuit to provide broadband amplification in various RF communication bands.

Abstract: A transmitter comprising a power amplifier, a phase modulator, a switched DC-DC converter, all operating in dual mode, and a controller is disclosed. The power amplifier is arranged to selectively operate either in a first mode or in a second mode, wherein the first mode is a linear mode and the second mode is a non-linear mode in order to save power with least increasing cost in hardware. The transmitter is adapted to operate at different allocated bandwidths, for different radio standards while keeping minimum power consumption governed by the controller. A transceiver, a communication device, a method and a computer program are also disclosed.

Abstract: Self-Organized Network (SON) architectures for heterogeneous networks are disclosed. In some embodiments, various SON architectures for heterogeneous networks are provided that can evolve with such networks while the core functional modules of the SON solution can remain the same. In some embodiments, techniques for implementing SON architectures for heterogeneous networks includes providing a base station that includes performing a pre-operation self-configuration; and performing an operation self-optimization.

Abstract: Transceivers implemented with a combination of super-heterodyne and zero intermediate frequency (ZIF) topologies are disclosed. In an exemplary design, an apparatus includes a frequency conversion circuit and a local oscillator (LO) generator. The LO generator generates a first LO signal and a second LO signal. The frequency conversion circuit performs frequency conversion (i) between intermediate frequency (IF) and baseband, based on the first LO signal, for an IF signal and (ii) between radio frequency (RF) and baseband, based on the second LO signal, for an RF signal. The frequency conversion circuit may perform frequency downconversion (i) from IF to baseband for a super-heterodyne receiver and (ii) from RF to baseband for a ZIF receiver. Alternatively or additionally, the frequency conversion circuit may perform frequency upconversion (i) from baseband to IF for a super-heterodyne transmitter and (ii) from baseband to RF for a ZIF transmitter.

Abstract: A system including a plurality of amplifiers, a plurality of first transmission lines, and a plurality of second transmission lines. The plurality of first transmission lines have first ends respectively connected to outputs of the plurality of amplifiers and second ends connected to a reference potential. The plurality of second transmission lines have first ends connected to a conductor and second ends that are unconnected. Signals output by the plurality of amplifiers to the plurality of first transmission lines are respectively magnetically coupled to the plurality of second transmission lines.

Abstract: A method for implementing envelope tracking (ET), the method comprising switching from a receiver (Rx) radio frequency (RF) path to a supply sensing path during factory calibration, sensing the power amplifier (PA)'s supply voltage via the supply sensing path, comparing the PA's supply voltage to a corresponding reference supply voltage, determining the difference between the PA's supply voltage and the corresponding reference supply voltage, and updating one or more parameters used to perform a PA load pre-distortion during factory calibration, wherein the PA load pre-distortion is used to match the PA's supply voltage to the corresponding reference supply voltage.

Abstract: In one embodiment, a circuit couples an integrated circuit to a powerline and protects the integrated circuit from overvoltage noise. In one example, the integrated circuit comprises a two-port differential transceiver. Respective Schottky diodes couple the ports to a power supply and reference, so one diode for each port conducts current in forward bias if an applied voltage exceeds a respective voltage reference plus the forward voltage of that diode. A respective end of a first transformer winding feeds each input port. Respective ends of a second transformer winding couple to capacitors that couple with the powerline. Back-to-back zener diodes are connected between the ends of the second winding. A zener diode with a breakdown voltage set based on the power supply voltage plus a margin is coupled between the power supply and ground so that the power supply voltage does not exceed a desired value plus the margin.

Abstract: There is provided a device including a communication device including a measurement portion configured to measure a reflection coefficient of an antenna that performs proximity wireless communication, during transmission of a transmission signal by the antenna, and a judgment portion configured to judge whether a value of the reflection coefficient measured by the measurement portion changes exceeding a value of a reflection coefficient of the antenna in a normal state and a predetermined threshold value.

Abstract: The present invention relates to a method for compensating a power amplification unit of a wireless RF module that includes a baseband unit, a RF transceiver unit, a power amplification unit and a control unit. The baseband unit is connected to the power amplification unit through the control unit and the RF transceiver unit. Based on the characteristic of the power amplification unit, the baseband unit provides a control signal to regulate the output signal characteristic of the power amplification unit, or provides a RF transceiver unit control signal to regulate the characteristics of the RF signal being transmitted by the RF transceiver unit to the power amplification unit, or to regulate the characteristics of the baseband signal being transmitted to the RF transceiver unit, enabling the characteristics of the output signal of the power amplification unit to meet the specifications of the related system.

Abstract: A method for transmitting a signal in a wireless communications network includes calculating, by a network element, first and second average powers. The first average power is associated with a first time period of a downlink transmission between a transmitter associated with the network element and at least one user, and the second average power is associated with a second time period of the downlink transmission. The method includes transmitting, by the transmitter, the signal at one of a rated transmission power and a boosted transmission power based on a first threshold value associated with the first average power and a second threshold value associated with the second average power. The rated transmission power is less than or equal to a long-term average power limit associated with a power amplifier of the transmitter, and the boosted transmission is greater than the rated power.

Abstract: A power control method and terminal equipment including: dropping, by terminal equipment, an SRS signal in other serving cell(s) or puncturing symbols of a PRACH signal in a secondary serving cell within the same OFDM symbol as the SRS signal in the other serving cell(s), when the terminal equipment needs to transmit the PRACH signal in the secondary serving cell and transmit the uplink SRS signal in the other serving cell(s) within the same OFDM symbol.

Abstract: Multi-stage crest factor reduction (CFR) techniques are provided for multi-channel multi-standard radio (MSR). A multi-stage crest factor reduction method comprises applying one or more data samples associated with at least one channel of a first technology type to a first individual crest factor reduction block; applying one or more data samples associated with at least one channel of a second technology type to a second individual crest factor reduction block; aggregating outputs of the first and second individual crest factor reduction blocks to generate an aggregated output; and applying the aggregated output to a composite crest factor reduction block. The individual crest factor reduction blocks can be implemented using a sampling rate appropriate for the corresponding technology type. The composite crest factor reduction block operates at a higher sampling rate than the individual crest factor reduction blocks.

Abstract: A power supply device includes a switching amplification unit that supplies power to a load, a linear amplification unit that corrects an output voltage applied to the load according to an input signal, and a power supply control unit that controls the power supply of the linear amplification unit according to the input signal.

Abstract: The present invention discloses a multi-mode signal transmission system and the transmission method thereof. The system comprises a transmitter, a selection device, a compensation device, and power amplifier modules. The transmitter comprises a Ramp Circuit connected to the transmitter and the power amplifier modules respectively. The selection device is configured between the transmitter and the power amplifier modules. The transmission method comprises: selecting a transmission module by the transmitter for transmitting the signal, the selection device strobes a transmission route between the transmission module and the power amplifier modules, and based on different transmission power parameters, the Ramp Circuit transmits different control signals to the power amplifier modules to adjust transmission gain of the power amplifier modules. The present invention has the purpose of improving the integration level of the chip and decreasing the board area and the difficulty of wiring.

Abstract: A mixer unit (30) for frequency translating, based on an LO signal, an input signal having one or more input signal components is disclosed. The mixer unit has a signal processing path (50a-d, 60a-d) from each Input terminal (32+, 32?) to each output terminal (34_I+, 34_I?, 34_Q+,34_Q?) of the mixer unit (30), The LO signal has an associated LO signal component (LO_Ia-d, LO_Qa-d) for each signal processing path. The mixer unit (30) comprises a plurality of mixer switches (70a-N) and a control unit (90). The control unit (90) is adapted to, for each signal processing path (50a-d, 60a-d), dynamically select an associated subset, in the following denoted active switch subset, of the plurality of mixer switches (70a-N) for operation in the signal processing path (50a-d, 60a˜d) such that which of the plurality of mixer switches (70a-N) belong to said active switch subset varies in time.

Abstract: A power detection device includes first and second power detection circuits configured to output a first and second detection signals, respectively, each including a half-wave rectifier circuit having a transistor, and connected to an RF input terminal, a ripple filter having a transistor and a capacitor, and configured to filter ripples of a rectified signal from the half-wave rectifier circuit, a transmission circuit having a pair of transistors, and connected to the half-wave rectifier circuit and the ripple filter to transfer the rectified signal to the ripple filter, and a constant current source having a transistor to supply a current to the half-wave rectifier circuit, the ripple filter, and the transmission circuit, and a subtraction circuit configured to receive the first and second detection signals and to calculate a difference between the two signals.

Abstract: Methods, devices, and computer program products for optimally phase rotating duplicate frames in wireless LAN transmissions are disclosed. In one aspect, phase rotation sequences may be chosen in order to minimize a peak-to-average power ratio (PAPR) of a frame or data unit, or of a portion of a frame or data unit, where the frame contains a plurality of identical frequency segments, such as a duplicate frame. The method involves selecting a frame bandwidth, and then selecting a phase rotation sequence based upon the frame bandwidth. The method further includes generating a frame including a number of identical 1 MHz frequency segments, and rotating some of those segments relative to other segments, based on the selected phase rotation sequence. The method further includes transmitting the frame.

Abstract: Configuration-feedback circuitry and transceiver circuitry are disclosed. The configuration-feedback circuitry regulates an output power from a radio frequency power amplifier based on a difference between a target output power from the radio frequency power amplifier and a measured output power from the radio frequency power amplifier. The transceiver circuitry regulates a modulated power supply voltage, which is used by the radio frequency power amplifier to provide power for amplification, based on the difference between the target output power from the radio frequency power amplifier and the measured output power from the radio frequency power amplifier.

Abstract: The present disclosure discloses a power-adjustable mobile phone and a power adjustment method thereof. The method comprises following steps of: a. determining whether a maximum power transmission instruction from a base station is received before establishing a phone call; b. determining whether an interrupt signal emitted from a range sensor is received after it is determined that the maximum power transmission instruction from the base station is received; c. setting a maximum output power of a radio frequency power amplifier (RFPA) to be a first output power when it is determined that the interrupt signal is not received, and setting the maximum output power of the RFPA to be a second output power when it is determined that the interrupt signal is received; and d. controlling the RFPA to output radio frequency (RF) signals with the maximum output power.

Abstract: A communication system is provided. The communication system includes an antenna, a power amplifier, a detector and a signal-processing module. The power amplifier provides an output signal to the antenna according to an input signal. The detector provides power information and voltage information according to the output signal. The signal-processing module obtains a loading variation according to the power information and the voltage information, and provides the input signal according to the loading variation. When the loading variation exceeds a threshold value, the signal-processing module performs a digital pre-distortion calibration for the input signal.

Abstract: A wake-up radio is configured to scan for transmissions while the radio receiver is in sleep mode. The wake-up radio detects incoming RF transmissions intended for the radio receiver by analyzing data frame characteristics in an incoming RF transmission. The data frame characteristics may contain a signature code that is unique to the radio receiver. The signature code may be based on the time duration of a sequence of orthogonal frequency division multiplex (OFDM) symbols received in a clear to send to self (CTS2S) transmission or a time duration of short interframe spaces (SIFS) used to transmit the data frames.

Abstract: A radio frequency (RF) power amplifier (PA) and an envelope tracking power supply are disclosed. The RF PA receives and amplifies an RF input signal to provide an RF transmit signal using an envelope power supply signal, which at least partially envelope tracks the RF transmit signal, such that the RF input signal has an RF mixer-based artifact. The envelope tracking power supply provides the envelope power supply signal, which includes mixer-based artifact pre-distortion to at least partially remove effects of the RF mixer-based artifact from the RF transmit signal.

Abstract: A digital to analog converter (DAC) includes a quantity of N cells including a Least Significant Bit (LSB) cell, a Most Significant Bit (MSB) cell and, N?2 cells ordered therebetween. Each of the N cells is configured to carry a current of I, 2*I, 4*I, 8*I, . . . , 2^(N?1)*I, respectively. At least the LSB cell includes a first cell element and a second cell element driven by a first current input and a second current input, respectively. A difference between a magnitude of the first current input and a magnitude of the second input current is approximately equal to I.

Abstract: The present specification discloses as one embodiment a power receiver for transmitting a message by using a power transmission signal. The power receiver comprises: a power reception portion for receiving the wireless power signal that is formed by a power transmitter; a demodulation portion for demodulating the received wireless power signal; a modulation portion for modulating the received wireless power signal; and a control portion for decoding a first packet from the wireless power signal that is demodulated by means of the demodulation portion, for determining whether a second packet that does not collide with the first packet which has been decoded can be transmitted, and for modulating the received wireless power signal so as to comprise the second packet by controlling the modulation portion, when transmission is possible according to the result of the determination.

Abstract: A non-transitory computer readable medium can include instructions for performing a method. The method can include receiving, at a mobile client, an enterprise call from an enterprise system in response to an incoming call from a calling party to the enterprise system. The method can also include determining, at the mobile client, whether the enterprise call is anchored in the enterprise system. If the enterprise call is determined to be anchored in the enterprise system, a confirmation message can be provided from the mobile client to the enterprise system in response to the enterprise call being answered for voice communication at the mobile client.

Abstract: A modulation method and modulator for an envelope tracking power supply. An output of a multi-level switching regulator (202) in the envelope tracking power supply modulator is in parallel connection with an output of a linear regulator (201) via an inductor (203) and supplies power to a load.

Abstract: In a power supply device, bidirectional converters that are each capable of supplying or regenerating an electric charge are provided between an input section for an input voltage and an output section for an output voltage. An amplitude change monitor circuit detects an envelope of an RF input signal. A converter switching circuit controls supply and regeneration of electric charges by the bidirectional converters so that the output voltage follows an amplitude change of the input signal. An output capacitor capacitance estimation unit estimates the capacitance of an output capacitor from its voltage and current. A delay time detection circuit grasps a delay time of a power supply device for a high frequency power amplification circuit and makes an adjustment through a delay adjustment circuit.

Abstract: A mobile station for use in a wireless network that operates according to the Long-Term Evolution Advanced (LTE-A) standard is operable to transmit an aperiodic sounding reference signal (SRS) to a base station in response to a triggering grant received from the base station. The bandwidth on which the mobile station transmits the aperiodic SRS depends on a type of the triggering grant. The type of the triggering grant is one of a downlink grant, an uplink multiple-input, multiple-output (MIMO) grant, and an uplink single-input, multiple-output (SIMO) grant.