Abstract: A wireless communication apparatus includes an amplifying unit that amplifies an input signal that includes signals with different frequencies of a first frequency and the second frequency; a measuring unit that measures a level of inter modulation distortion generated in a signal obtained by the input signal being amplified by the amplifying unit; a determining unit that determines whether the level of the inter modulation distortion measured by the measuring unit is equal to or greater than a regulation value that is previously stored; and a control unit that decreases, when a result of the determination obtained by the determining unit indicates that the level of the inter modulation distortion is equal to or greater than the regulation value, a level of a signal input to the amplifying unit.

Abstract: Provided herein are apparatus and methods for reconfigurable directional couplers in an RF transceiver. Reconfigurable directional couplers can be reconfigured and designed to provide high directivity using configurable capacitors to effect a mutual coupling and using lumped components or delay lines to effect a phase shift. Depending on the embodiment, the reconfigurable directional coupler can include capacitors, inductors, and switching components. The coupler can be designed for multi-band operation with an adjustable coupling factor conducive to semiconductor process integration. The coupler can have variable phase shifters to achieve a desired level of directivity in the coupler.

Abstract: A technique for cancelling or reducing crosstalk signals between controlled oscillators in an integrated circuit is provided. The technique involves an arrangement adapted to reduce a crosstalk signal generated by a first controlled oscillator to a second oscillator both comprised in the integrated circuit, wherein both controlled oscillators are configured to output a respective clock signal. The arrangement comprises a detector adapted to detect the crosstalk signal generated by the first controlled oscillator to the second controlled oscillator, a crosstalk cancellation circuit adapted to generate a cancellation signal having an amplitude substantially the same as that of the crosstalk signal and a phase substantially opposite to that of the crosstalk signal, and a cancellation signal injector adapted to introduce the cancellation signal into the second controlled oscillator.

Abstract: A wireless communication device may include a logic configured to select a first antenna as a transmitting antenna and a second antenna as a non-transmitting antenna; and to calculate a short-term antenna metric difference between the transmitting antenna and the non-transmitting antenna, a mid-term antenna metric difference between the transmitting antenna and the non-transmitting antenna, and a long-term antenna metric difference between the transmitting antenna and the non-transmitting antenna. The logic may be further configured to switch the second antenna to the transmitting antenna and the first antenna to the non-transmitting antenna, in response to determining that at least one of the calculated short-term antenna metric difference is greater than a short-term threshold, the calculated mid-term antenna metric difference is greater than a mid-term threshold, or the long-term antenna metric difference is greater than a long-term threshold.

Abstract: An Internet protocol (IP) telephony system provides telephony services to a mobile telephony device via data packet communications that traverse a data network. If the IP telephony system has received calls that were missed by the user of the mobile telephony device, or if the IP telephony system has received communications that have not yet been reviewed by the user of the mobile telephony device, information about those missed calls and unreviewed messages is delivered to the mobile telephony device so that the user can be alerted to their existence. The information may be delivered to the mobile telephony device in a push notification.

Abstract: A terminal device and a method for controlling the same are disclosed herein.

Abstract: An impedance matching circuit for a wireless communication device includes: a first node that receives a first impedance; a second node that is connected to an antenna having a second impedance; a first variable capacitor that is connected between the first node and a third node; a second variable capacitor that is connected between the third node and a reference potential; a first inductive element that is connected in parallel with the second variable capacitor between the third node and the reference potential; and a third variable capacitor and a second inductive element that are connected in series between the third node and the second node.

Abstract: A radio frequency (RF) front end having multiple low noise amplifiers modules is disclosed. In an exemplary embodiment, an apparatus includes at least one first stage amplifier configured to amplify received carrier signals to generate at least one first stage carrier group. Each first stage carrier group includes a respective portion of the carrier signals. The apparatus also includes second stage amplifiers configured to amplify the first stage carrier groups. Each second stage amplifier configured to amplify a respective first stage carrier group to generate two second stage output signals that may be output to different demodulation stages where each demodulation stage demodulates a selected carrier signal.

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: A system includes a first filter circuitry and one or more second filter circuitry. The first filter circuitry can operate at a frequency of a wireless signal to filter the wireless signal to attenuate undesired feedthrough components and pass through a desired component. The system can also include a multi-phase mixer to convert the frequency of the wireless signal to a lower frequency and divide the wireless signal into at least four phase shifted baseband signal components. The second filter circuitry can operate at the lower frequency to filter the phase shifted baseband signal components to attenuate undesired feedthrough components and pass through a desired component. The system can also include a matrix to combine the baseband signal components to form an output signal.

Abstract: A device includes circuitry configured to receive a signal burst, apply one or more filters to the signal burst based to achieve a predetermined image rejection rate, apply at least one harmonic rejection mode to the signal burst, and amplify the signal burst based on a gain partitioning determination.

Abstract: In some implementations, an apparatus includes an echo canceller that generates an echo interference compensation signal that compensates for an echo interference signal in a communication signal, a crosstalk canceller that generates a crosstalk interference compensation signal that compensates for a crosstalk interference signal in the communication signal, and a combiner that generates a combined interference compensation signal based on the echo interference compensation signal and the crosstalk interference compensation signal.

Abstract: Techniques are provided for delivering content to mobile communication devices related to interactions of members with a user community. The method involves detecting a communication session involving a mobile communication device; determining one or more context parameters associated with the communication session; and delivering content related to the context parameters to one or more mobile communication devices. Data is stored at a central computing entity that indicates association or membership of a plurality of mobile communication device users in a user community. The central computing entity detects when an action is taken by one mobile device user that is a member of the user community, and sends a notification to members of the social circle based on the detected action. These techniques allow individuals who are involved in a user community to maintain their interaction with the user community using their mobile communication devices.

Abstract: An approach is provided for providing a WiFi network information service. A configuration client processes and/or facilitates a processing, by at least one module of at least one access point, of configuration data stored at the at least one access point to determine network information. The configuration client then causes a transmission of the network information by the at least one module to at least one server. A location client also determines at least one request, from at least one client, for network information associated with at least one access point, at least one location, or a combination thereof. The location client then processes and/or facilitates a processing of the at least one request to cause a generation of at least one query for the network information from at least one server, wherein the network information is determined from at least one module of the at least one access point.

Abstract: In an embodiment, a power amplifier (PA) includes a signal processing path including gain stages to receive a radio frequency (RF) signal and to output an amplified RF signal, sensors coupled to the signal processing path each to sense a characteristic of operation of the PA, and a microcontroller configured to execute instructions and to receive the operation characteristic(s) and to control one or more parameters of the signal processing path responsive this operation characteristic.

Abstract: An apparatus is provided for load modulating a power amplifier that is configured to output a multiband radio frequency signal comprising at least a first frequency band and a second frequency band. The apparatus comprises a multiplexer (31) coupled to receive a multiband radio frequency signal from the output of a power amplifier, and configured to separate the multiband radio frequency signal into first and second frequency band signals. A first load modulator circuit (33i) is provided in a first branch, the first load modulator circuit coupled to receive the first frequency band signal, and configured to load modulate the first frequency band signal. A second load modulator circuit (332) is provided in a second branch, the second load modulator circuit coupled to receive the second frequency band signal, and configured to load modulate the second frequency band signal.

Abstract: A system for rejecting a selected harmonic from an input signal is disclosed. The system includes a mixer for creating a signal of new frequency from two input signals of different frequencies. The mixer is coupled to the input signal a frequency generator coupled to the mixer. The frequency generator is configured to generate a signal having a selected duty cycle. The system also includes a controller coupled to a frequency generator.

Abstract: There is disclosed a receiver circuit and a method for controlling gain in a receiver circuit. The receiver circuit includes a first amplifying stage, a mixer, a filter and a second amplifying stage. The receiver circuit further includes a first feedback loop coupled to the first amplifying stage and configured to generate a first gain control signal for controlling the first signal gain according to a first amplified signal, wherein the first feedback loop operates to maintain the strength of the first amplified signal at a first threshold. The receiver circuit further includes a threshold controller coupled to the first feedback loop, wherein the threshold controller is configured to generate a first threshold control signal for adjusting the first threshold.

Abstract: A system including a diversity module and an antenna selection module. The diversity module is configured to measure i) a first signal-to-noise ratio and a first error rate for a first signal received via a first antenna, and ii) a second signal-to-noise ratio and a second error rate for a second signal received via a second antenna. The antenna selection is module configured to select the first antenna or the second antenna by comparing i) the first signal-to-noise ratio to the second signal-to-noise ratio, and ii) the first error rate to the second error rate.

Abstract: The present invention provides a mobile terminal and a method of displaying an image using the same. A method of displaying an image includes connecting a mobile terminal displaying an image on a screen to a display apparatus through a TV-out cable; terminating the display of the image on the screen by the mobile terminal and displaying supplementary information of the image on the mobile terminal; and displaying the image in the display apparatus by transmitting the image from the mobile terminal to the display apparatus through the TV-out cable. By utilizing a display apparatus for displaying an image, and a display screen of a mobile terminal as a space for controlling the image and displaying supplementary information of the image file, the convenience of a user of the mobile terminal is improved.