Abstract: Described are techniques for distributing audio data to multiple devices for a synchronized output in a manner that reduces congestion and interference with a first frequency band of a network. A first audio device receives audio data using the first frequency band, via an access point, then transmits the data to a second audio device using a different protocol. The second audio device may then distribute the audio data to other devices using a different frequency band. The two devices selected for use distributing the audio data may be determined based on signal quality for communications between the devices, data throughput between the first audio device and the access point, counts of devices that may receive data from the second device, and signal quality and other metric data associated with communications by the second audio device.

Abstract: An antenna matching device for a dual-frequency tire pressure detector includes: a microcontroller having a control pin; a dual-frequency signal unit controlled by the microcontroller to which one of two different frequency signals to generate; and a matching unit having an input end, two external pins, and an output end, the input end being electrically connected to the dual-frequency signal unit to receive the frequency signals from the dual-frequency signal unit, the external pins being electrically connected to two ends of a diode, respectively, with the control pin electrically connected to one of the external pins, and the output end being electrically connected to an antenna, wherein the matching unit provides two impedances between the input end and the output end so that the microcontroller controls an operating state of the diode according to whether the control pin is grounded, thereby switching between the impedances of the matching unit.

Abstract: This disclosure provides an antenna apparatus in which stable antenna characteristics are maintained by detecting surrounding conditions that affect the antenna characteristics and appropriately compensating the antenna characteristics. More specifically, when surrounding condition such as a human body (e.g., a palm or fingers) approaches and enters an electric field of a pseudo dipole formed by an antenna element electrode, a stray capacitance is sensed and stable antenna characteristics are maintained by appropriately controlling an antenna matching circuit to compensate for a change in the antenna characteristics due to the approach of the surrounding condition.

Abstract: A method and apparatus are described for transmitting a channel state information (CSI) reporting at a user equipment (UE) in a wireless communication system. A rank indicator (RI) and a first type precoding matrix indicator (PMI) are transmitted to a base station (BS) according to a first CSI feedback type. A second type PMI and a channel quality information (CQI) are transmitted to the BS according to a second CSI feedback type. The RI and the first type PMI are jointly coded, and transmitted through a physical uplink control channel (PUCCH). A reporting period of the first type PMI is longer than a reporting period of the second type PMI. The first type PMI is a wideband PMI, and the second type PMI is a subband PMI. The reporting period of the first type PMI is equal to a reporting period of the RI.

Abstract: A mobile device includes a metal housing and an antenna structure. A ground plane and a ground branch form at least a portion of the metal housing. The ground branch is coupled to the ground plane. A slot is formed between the ground branch and the ground plane. A circuit element is coupled to the ground branch and the ground plane. The antenna structure is formed by the ground branch. The antenna structure is excited by a signal source.

Abstract: A portable communication system (100) maintains mission critical functionality. An accessory (120) and a handset (130) are tethered and interoperate such that the accessory operates as the primary controlling device and the handset operates as a secondary device. The accessory (120) contains a main applications processor (102) that handles non-mission critical functions. The accessory further contains a mission critical processor (104) for handling mission critical functions of transmit and receive audio as well as PTT and emergency. In response to a failure of the mission critical processor (104), the mission critical functions are maintained by handing over the mission critical functions to the non-controlling device in a manner transparent to the user. The handover is triggered in response to status changes of the mission critical processor or as a result of battery depletion. Audio paths are re-routed through backup paths (146b,148) negating reliance on processors of the accessory (120).

Abstract: The present invention relates to a maritime communication system and method and provides a maritime communication system and method, the maritime communication system comprising: a plurality of user terminals by which a SNS can be used on the sea, and in which an application for providing content is installed; at least one maritime communication server for providing the SNS and the content for the user terminal on the sea; a land communication server for communicating with the maritime communication server and controlling communication between a user of the maritime communication server and a user located on land or a user of another maritime communication server; a content server for providing the content of the application via the land communication server; and a management server for producing and distributing the application installed in the user terminals or controlling operations of all the servers.

Abstract: A calibration architecture that enables accurate calibration of radio frequency (RF) integrated circuits (ICs) chips used in transceiver RF systems in a relatively simple testing environment. Embodiments of the invention include one or more on-chip switchable internal calibration paths that enable direct coupling of a portion of the on-chip circuit to an RF test system while isolating other circuitry on the chip. Some embodiments allow interconnection of switchable internal calibration paths between separate IC chips. Still other embodiments utilize internal switches and antenna mutual coupling to provide over-the-air calibration, alone or in combination with direct signal coupling via internal calibration paths. Periodic self-calibration of an RF IC can be performed after initial factory calibration, so that adjustments in desired performance parameters can be made while such an IC is embedded within a final system, and/or to take into account component degradation due to age or other factors.

Abstract: According to an aspect of this disclosure, a radio communication device is provided including: a first transceiver configured to transmit and receive signals in accordance with a Cellular Wide Area radio communication technology; a second transceiver configured to transmit and receive signals in accordance with a Short Range radio communication technology or a Metropolitan Area System radio communication technology; a processor configured to at least partially synchronize the receiving or transmitting of signals of the first transceiver with the receiving or transmitting of signals of the second transceiver such that at least one of at least a part of the receiving and a part of the transmitting of signals of the first transceiver and of the second transceiver is carried out at the same time.

Abstract: Methods and systems for a multi-band transceiver front-end architecture with reduced insertion loss may comprise, in a transceiver comprising a first plurality of switches (each with a common terminal coupled to a transmit signal path), a second plurality of switches (each with a common terminal coupled to a receive signal path), and a plurality of communications links: operatively coupling the transmit signal path to one of the communications links using one of the first switches when the transceiver is in a transmit mode, and operatively coupling the receive signal path to one of the communications links using one of the second switches when the transceiver is in a receive mode. An off capacitance of at least one of the switches may be reduced utilizing an operatively coupled inductive element. The inductive element may comprise an inductor operatively coupled in series with the transmit signal path.

Abstract: A communication device comprises a processor; and a diplexer comprising a low pass filter passing signals with frequency below a first frequency threshold, the low pass filter having a first input and a first output, and a second filter being one of a high pass filter and a band pass filter passing signals with frequency above a second frequency threshold, the second filter having a second input and a second output; and a switch controllable by the processor for connecting the second input to a termination in a first state and connecting the second input to the first input in a second state responsive to a control signal from the processor, wherein the first output is coupled to the second output and the first input is configured to receive an input signal having a frequency range covering at least the first frequency threshold.

Abstract: A base station apparatus of mobile communication system is provided, including an antenna system including first antenna for transceiving signals for a first path among MIMO paths, and a second antenna for transceiving signals for a second path among the MIMO paths, a first duplexer including transmission filter for processing the transmitted signal of first path and reception filter for processing the received signal of second path, a second duplexer including reception filter for processing the received signal of first path and transmission filter for processing the transmitted signal of second path, and a path change unit for providing the transmitted signal provided from the first duplexer to the first antenna and the received signal provided from the first antenna to the second duplexer and to provide the transmitted signal from the second duplexer to the second antenna and the received signal from the second antenna to the first duplexer.

Abstract: The invention relates to a method for automatically adjusting a plurality of tunable passive antennas and a multiple-input-port and multiple-output-port tuning unit. The invention also relates to an apparatus for radio communication using this method. An apparatus for radio communication of the invention comprises: 4 tunable passive antennas; a multiple-input-port and multiple-output-port tuning unit having 4 input ports and 4 output ports; 4 sensing units; 4 feeders; a transmission and signal processing unit, which applies 4 excitations to the input ports, one and only one of the excitations being applied to each of the input ports, and which delivers one or more antenna adjustment instructions and one or more tuning unit adjustment instructions; and a control unit, which delivers one or more antenna control signals to the tunable passive antennas, and which delivers one or more tuning control signals to the multiple-input-port and multiple-output-port tuning unit.

Abstract: A matrix switch comprises a number of switching elements configured in a matrix and a controller that operates to dynamically select one or more signal routes via the switching elements. The matrix switch can operate to dynamically route multiple signal routes between antenna ports to one or more transceiver ports, transmitter ports, receiver ports or termination ports. The controller can select the signal routes based on a set of criteria, which can include one or more use conditions, radio resource conditions or propagations conditions.

Abstract: A multi-protocol transceiver provides a plurality of RF front ends, each responsive to a particular protocol and frequency, a common set of analog/digital converters, a baseband processor which receives and demodulates and also modulates and transmits baseband wireless packets for mixing to a carrier frequency by each RF front end. A timing controller allocates intervals of time for a first protocol such as WAVE protocol, and also allocates exclusive intervals of time for a second protocol such as Bluetooth.

Abstract: A method for transmitting a Channel State Information (CSI) reporting at a user equipment (UE) in a wireless communication system is disclosed. The method includes transmitting a rank indicator (RI) and a first type precoding matrix indicator (PMI) to a base station (BS) according to a first CSI feedback type; transmitting a second type PMI to the BS according to a second CSI feedback type, wherein the RI and the first type PMI are jointly coded, and transmitted through a physical uplink control channel (PUCCH), wherein the RI and the second type PMI are not jointly coded, and transmitted through the PUCCH, wherein a transmission period of the first type PMI is different than a transmission period of the second type PMI, wherein the transmission period of the first type PMI is longer than the transmission period of the second type PMI, and wherein the RI is 2, 3 or 4 bits, and a size of the jointly coded RI and the first type PMI are 4 bits.

Abstract: A method, device and system provide improved throughput for network subscriptions in multi-SIM, multi-standby wireless devices by triggering false or fake NAK/Tx messages prior to the tune-away. The technique includes receiving and decoding communications from a node at a user equipment during a first subscription communication mode; in response to a communication from the node to the user equipment after a certain time period prior to a tune away period in which the user equipment communicates in a second subscription communication mode, communicating a fake NACK message from the user equipment to the node; and after the tune away period ends, receiving communications at the user equipment from the node and responding with an ACK message.

Abstract: A fully integrated feedback controlled coil driver is disclosed for inductive power transfer to electronic devices. For efficient power transfer, a voltage across a switch that switchably couples the coil between a DC input power source and ground is sampled and compared with a preselected reference voltage to generate an error voltage. The error voltage is integrated over time and compared to a voltage ramp. The value of the integrated error voltage relative to the voltage ramp is used to obtain an optimal on time for the switch such that coil current is maximized for a given DC input power. The coil driver can also provide ASK modulation on the coil current by changing the size of the switch according to input data.

Abstract: A system that incorporates teachings of the subject disclosure may include, for example, a process that assigns a respective priority level to each of a number of tuning algorithms controlling different tunable elements of a communication device. A first tuning algorithm is executed according to a first priority level assigned to the first tuning algorithm. A remaining number of the tuning algorithms are executed to determine whether the first tuning algorithm has affected a tuning state of any of the remainder of tuning algorithms. A second of the number of tuning algorithms is executed in response to a stability condition of the first tuning algorithm and according to a second priority level assigned to the second tuning algorithm. Other embodiments are disclosed.

Abstract: Embodiments of full-duplex systems with reconfigurable antennas are described. In one embodiment, a full-duplex reconfigurable antenna transceiver includes a transmit chain, a receive chain, and a reconfigurable antenna having a plurality of reconfigurable modes. The transceiver may also include an antenna controller configured to set a mode of the reconfigurable antenna. According to other aspects, the transceiver may also include a signal processor configured to transmit a set of training symbols during a training interval. The antenna controller may be further configured to select a respective mode of the reconfigurable antenna for each training symbol in the set of training symbols. Additionally, the antenna controller may be configured to calculate a received Signal-of-Interest to Interferer Ratio (SIR) for each training symbol of the set of training symbols. In this context, a full-duplex system utilizing a reconfigurable antenna may achieve significant rate improvement compared to half-duplex systems.

Abstract: An impedance tuning control apparatus has a processing circuit and an output circuit. The processing circuit determines a first control setting according to a first performance metric, and performs a search operation with a search start point set by the first control setting to find a second control setting according to a second performance metric. The second performance metric is different from the first performance metric. The output circuit outputs a final control setting to a tuner, wherein the final control setting is derived from the second control setting.

Abstract: One embodiment discloses an antenna structure. The antenna structure may comprise a transmit antenna element comprising a first transmit antenna sub-element and a second transmit antenna sub-element. The antenna structure can comprise a receive antenna element comprising a first receive antenna sub-element and a second receive antenna sub-element. At least one electronic component of the antenna structure may be coupled with a ground plane. The first transmit antenna sub-element, the second transmit antenna sub-element, the first receive antenna sub-element, and the second receive antenna sub-element may each comprise a first portion and a second portion. The second portion may be larger than the first portion. The first portion can be closer to a center position of an arrangement of the sub-elements than the second portion. In one embodiment, the arrangement of the sub-elements about the center position forms a four-leaf clover-like arrangement.

Abstract: RF front end circuitry includes mid/high-band switching circuitry and a carrier-aggregation diplexer. The mid/high-band switching circuitry is configured to receive and selectively route mid-band and high-band signals between a mid/high-band output port and a number of mid/high-band transceiver ports. The carrier-aggregation diplexer is coupled to a first one of the mid/high-band transceiver ports. Further, the carrier-aggregation diplexer is configured to pass mid-band signals between a mid-band diplexer port and the first one of the mid/high-band transceiver ports while attenuating other signals, and pass high-band signals between a high-band diplexer port and the first one of the mid/high-band transceiver ports while attenuating other signals.

Abstract: A method executed in a first radio base station located in a first cell is provided for acquiring scheduling information associated with a second radio base station located in a neighboring cell, where the method comprises listening, via an air interface, to scheduling information transmitted, via a downlink control channel, from the second radio base station; decoding the received scheduling information, and providing the decoded scheduling information to an uplink receiver and/or uplink scheduler associated with the radio base station, such that the uplink receiver and/or uplink scheduler will be able to enhance its performance on the basis of the received scheduling information. An arrangement for executing the suggested method is also provided.

Abstract: According to an aspect of this disclosure, a radio communication device is provided including: a first transceiver configured to transmit and receive signals in accordance with a Cellular Wide Area radio communication technology; a second transceiver configured to transmit and receive signals in accordance with a Short Range radio communication technology or a Metropolitan Area System radio communication technology; a processor configured to at least partially synchronize the receiving or transmitting of signals of the first transceiver with the receiving or transmitting of signals of the second transceiver such that at least one of at least a part of the receiving and a part of the transmitting of signals of the first transceiver and of the second transceiver is carried out at the same time.

Abstract: A radio communication device is described having a first transceiver configured to transmit and receive signals in accordance with a Cellular Wide Area radio communication technology; a second transceiver configured to transmit and receive signals in accordance with a Short Range radio communication technology or a Metropolitan Area System radio communication technology; a first processor configured to control the first transceiver to transmit signals during a transmitting period, the transmitting period comprising a first time period, during which signals are transmitted, and a second time period, during which no signals are transmitted; and a second processor configured to control the second transceiver to transmit signals taking into account the transmitting period of the first transceiver such that the second transceiver transmits signals at least partially during the second time period.

Abstract: A device includes at least one first amplifier circuit configurable to receive and amplify an input radio frequency (RF) signal having a first carrier at a first input signal level and provide a first amplified RF signal, and at least one second amplifier circuit configurable to receive and amplify the input RF signal having a second carrier at a second input signal level and provide a second amplified RF signal, the at least one first amplifier circuit having a first input impedance, the at least one second amplifier circuit having a second input impedance.

Abstract: The signal receiver has means to suppress at least one higher harmonic component from a MEMS or crystal oscillator having a reference resonator in filtered intermediate signals of a signal receiver. The signal receiver comprises an antenna for receiving electromagnetic signals, a low noise amplifier for amplifying signals received by the antenna, one MEMS or crystal oscillator comprising a reference resonator to generate an oscillating signal with a predefined duty-cycle, a mixer for mixing the amplified and received signals with the oscillating signal to generate intermediate signals, a band-pass filter to filter the intermediate signals, and a duty-cycle controller coupled to the MEMS or crystal oscillator and coupled to the output of the band-pass filter to analyze the spectrum of the filtered intermediate signals and to modify the duty-cycle of the oscillating signal in response to the spectrum analysis of the filtered intermediate signals.

Abstract: A wireless communication apparatus includes a power switch unit that switches a power supplied from a battery, and a timer unit that measures a time period through a power supplied from the battery. The power switch unit is turned on upon receiving a trigger for turning on the power supply and turned off upon receiving a trigger for turning off the power supply. When a wireless unit and a control unit are supplied with the power through the power switch unit in accordance with the trigger for turning on the power supply, the control unit controls to receive a wireless signal from a different wireless communication apparatus, and the control unit then sets a given value of the expiration of the time period in the timer unit and outputs the trigger for turning off the power supply to the power supply control unit.

Abstract: An electronic device may include an antenna, a transceiver, and a low noise amplifier module that amplifies receive signals from the antenna to the transceiver circuitry in a first configuration and passes transmit signals from the transceiver to the antenna in a second configuration. The low noise amplifier module may include a first switching circuit coupled to the antenna, a second switching circuit coupled to the transceiver, at least one low noise amplifier coupled between the first and second switching circuits, and a transmit bypass path coupled between the first and second switching circuits. The transceiver may be located in a first electronic device region, whereas the low noise amplifier module and the antenna may be located in a second region. The low noise amplifier module may help compensate for signal loss between the first and second regions and allow for transmit signals to pass to the antenna.

Abstract: A communication device includes a receiver that is capable of canceling in -channel interference. The receiver includes an antenna for receiving a wireless signal comprising in-channel components and an out-of-channel component, wherein the in-channel components comprise a desired component and an in-channel interference component. A first filter of the receiver filters the wireless signal by blocking at least a portion of the out-of-channel component to produce a first signal comprising the in -channel components, and at least a second filter of the receiver filters the wireless signal by blocking at least a portion of the in-channel components to produce a second signal comprising the out-of-channel component. An in-channel interference estimator of the receiver generates an in-channel interference estimation signal based on the second signal. And a combiner of the filter combines the first signal and the second signal to at least partially cancel the in-channel interference component of the first signal.

Abstract: An apparatus comprises a tunable duplexer configured to output a transmission signal to be wirelessly transmitted from the apparatus at a transmission frequency, and configured to input a reception signal wirelessly received by the apparatus at a reception frequency, a tuning device connected to the tunable duplexer, configured to control a balance between impedances of an antenna port and of a balance port of the tunable duplexer, a transmitting device configured to, during a predetermined time period, wirelessly transmit a specific transmission signal for calibration of the tunable duplexer, a receiving device configured to, during the predetermined time period, wirelessly receive the specific transmission signal transmitted by the transmitting device, and a measuring device configured to, during the predetermined time period, measure the power of the specific transmission signal received by the receiving device.

Abstract: A method and system performs antenna tuning which enhances radio frequency (RF) tuner reliability within a wireless communication device (WCD). The WCD, in response to receiving a request to change an active RF tuning state, retrieves component usage data corresponding to components of a tuning circuit that is tunable to an RF operating channel. The WCD selectively determines, using device environment state data and/or RF state data and the component usage data, an RF tuning state tuned to the RF operating channel. The selected RF tuning state (a) satisfies tuning performance specifications and (b) enhances component reliability performance by minimizing an operational wear on tuning circuit components. The WCD configures the tuning circuit using the selected RF tuning state and tracks session parameter values for tuning circuit components during a corresponding communication session.

Abstract: Systems, method, and devices are provided for transmitting data. In one aspect, a method includes providing a plurality of communication modules, each of the plurality of communication modules configured to transmit data using a different communication method; establishing, with the plurality of communication modules, a plurality of simultaneous respective communication links to a remote terminal; selecting, based on a switching criterion, at least one of the plurality of simultaneous respective communication links to be used to transmit data; and transmitting data via said at least one of the plurality of simultaneous respective communication links selected based on the switching criterion.

Abstract: A flat-conductor connection element for an antenna structure is described. The flat-conductor connection element is arranged in or on a pane and has: a flat conductor with a base layer, a conductor track, a first dielectric layer, a shield, and a second dielectric layer and a metal frame.

Abstract: Disclosed are a wireless power transmitter capable of transmitting power wirelessly according to an impedance of an output side and a wireless power transceiver. There are provided a wireless power transmitter and a wireless power transceiver including: a wireless power transmitting unit converting input power into a preset transmission power and transmitting the converted input power wirelessly; and a controlling unit controlling a transmission of the transmission power according to a level of output impedance of the transmission power output from the wireless power transmitting unit.

Abstract: The present invention relates to a method and a mobile communication terminal comprising a communication interface having an antenna arrangement, an arrangement for providing a geographical position of the terminal, a memory and a controller. The controller is configured to adjust transmission parameters of said antenna arrangement with respect to a geographical position of the mobile communication terminal with respect to a geographical position data received from said arrangement for providing a geographical position of the mobile communication terminal.

Abstract: In order to send electromagnetic signals received on one or more first frequency bands, the method applies a transformation to the signals, by performing the following actions: selecting first frequency subbands, forming a first set of frequency subbands of the first frequency band(s); using organization rules to associate one or more second sets of frequency subbands, forming one or more second frequency bands, with each first frequency subband of the first set; and using optimization rules to determine frequency translations to transpose the signals received in the first frequency subbands into signals sent in the second frequency band(s).

Abstract: A software environment (300) is established in a portable multimode communication device (PMCD) (100) in which a plurality of software applications (310, 312, 314, 316) are executing. Each software application performs a predetermined function using a hardware set. The hardware set includes a plurality of hardware resources (204, 206, 209, 210, 218, 220, 222, 104, 226, 236, 228, 232, 230, 234) provided on the PMCD. The PMCD will periodically evaluate a usage scenario and, based on this evaluation, allocates to each software application selected ones of the plurality of hardware resources comprising the hardware set. The allocation of hardware resources comprising each hardware set is dynamically varied in response to the evaluating.

Abstract: An antenna arrangement includes a switch having an open state and a closed state, a first antenna that operates as a first active driven element in a first frequency band in response to the switch being in the open state, and a second antenna that operates as a second active driven element in a first frequency band in response to the switch being in the open state. The closed state configures the first antenna and the second antenna to operate in a second frequency band different from the first frequency band by operatively coupling a first impedance between the first antenna and a radio frequency ground, and by operatively coupling a second impedance between the second antenna and the radio frequency ground. The first antenna functions as a parasitic element in the second frequency band and the second antenna functions as an active driven element in the second frequency band.

Abstract: Methods, systems, and computer readable media for wideband frequency and bandwidth tunable filtering are disclosed. According to one aspect, the subject matter described herein includes a wideband frequency and bandwidth tunable filter that splits a filter input signal into first and second input signals, modifies the first input signal to produce a first output signal, modifies the second input signal to produce a second output signal having an intermediate frequency response, and combines the first and second output signals while adjusting their relative phases and/or amplitudes to produce a filter output signal with the target frequency response. Adjustment includes splitting the second input signal into third and fourth input signals, which are modified and then combined to produce the second output signal having the intermediate frequency response.

Abstract: A RF switch may include: a common port coupled to an antenna to transmit and receive first and second high frequency signals; a transmitting switching unit coupled between a transmitting port transferring the first high frequency signal and the common port and including a plurality of switching devices coupled to each other in series; and a receiving switching unit coupled between a receiving port transferring the second high frequency signal and the common port and including a first switching unit including a first switching device. The first switching unit may further include a second switching device having a first terminal coupled to a first terminal of the first switching device and a second terminal coupled to a control terminal of the first switching device.

Abstract: A system that incorporates teachings of the subject disclosure may include, for example, a plurality of variable capacitors, a first set of resistors for applying a bias voltage to each variable capacitor of the plurality of capacitors, and a second set of resistors for providing a DC ground to each variable capacitor of the plurality of capacitors. The system can include one or more of multiple bias points, anti-parallel diodes, a choke inductor or a ground inductor. Other embodiments are disclosed.

Abstract: Exemplary embodiments are related to a low-noise amplifier (LNA) matching device. A device may include an antenna for receiving a wireless signal and at least one LNA. The device may further include an LNA matching device coupled between the antenna and the at least one LNA and configured to receive one or more control signals to provide an optimal LNA match setting for each band of a plurality of frequency bands.

Abstract: Antenna array calibration systems and related methods include or utilize a plurality of signal splitter/combiner networks. Each of the signal splitter/combiner networks has a calibration signal sampling point in electrical communication with a signal input point, and signal output points. Each calibration signal sampling point may be capacitively coupled to a respective calibration source input of a calibration network. The signal splitter/combiner networks may be formed as phase-shifting networks.

Abstract: A system that incorporates teachings of the present disclosure may include, for example, a communication device having a controller to provision a matching network that controls one or more operational characteristics of one of a receiver portion and a transmitter portion of the communication device according to a profile describing one or more characteristics of a communication system from which the communication device operates. Additional embodiments are disclosed.

Abstract: The present invention relates to the communication technology field, more specifically, to a scheme of bilateral antenna. A device for improving the stray isolation between the antennas in the bilateral antenna comprises a plurality of communication modules having an antenna and a power amplification module; at least one of the communication modules further comprises a tuning module. The power amplification module is connected to the antenna directly or through the tuning module. The stray isolation between the communication module and other communication module is improved by adjusting the communication modules comprising the tuning module. This invention increases the stray isolation between the communication modules in different frequency bands, specifically, when a long interval exits between working frequency bands. Consequently, the radiance performance of the bilateral antenna of the mobile termination is satisfied, and the capacity of resisting disturbance between the systems is enhanced.

Abstract: A system that incorporates teachings of the present disclosure may include, for example, a computer-readable storage medium having computer instructions to perform actual measurements of one or more performance parameters of a communication device according to a subset of tuning states of a tunable matching network operable in a communication device, determine estimated measurements of the one or more performance parameters of the communication device for a portion of the tuning states not included in the subset of tuning states according to the actual measurements, identify a data set for each of the one or more performance parameters from at least portions of the tuning states and the actual and estimated measurements, and determine from at least a portion of the date sets one or more tuning states that achieve at least one desirable performance characteristic of the communication device. Additional embodiments are disclosed.

Abstract: A method of operating an electronic device includes providing a plurality of antenna elements, determining that a change is to be made to at least one of the plurality of antenna elements, and scheduling the change to the at least one of the plurality of antenna elements during a time interval that a transmission power amplifier has a power level below a threshold. The change to the at least one of the plurality of antenna elements may also be made responsive to a reduction to the power level of the transmission power amplifier below the threshold.

Abstract: In a wireless communication device (10), adjustment means (matching controlling means (152)) changes a reactance of a matching section (17), determination means (calculation means (151), matching controlling means (152)) determines whether a resonance frequency of an antenna (11) exists on a side higher than or lower than the operation frequency of the antenna (11) on the basis of a change in an intensity of a signal, which change is caused by a change in the reactance and is detected by a signal intensity detection section (14), and the adjustment means adjusts the reactance so that the resonance frequency is closer to the operation frequency on the basis of a result of determination of the determination means.