Abstract: Embodiments of the present disclosure provide system and method for generating a transmission signal. A transmitter generates and transmits a transmission signal based on signal components. Circuitry that is coupled to the transmitter receives complex plane components of a signal to be transmitted and alters the signal such that a complex plane trajectory of the signal passes nearer to an origin of a complex plane of the complex plane trajectory than does an original complex plane trajectory of the signal. The circuitry determines the signal components to be transmitted by the transmitter based on the altered signal.

Abstract: A deployed configurable communication integrated circuit (IC) and/or chipset which may be integrated within a wireless communication and/or multi-media communication device may be operable to monitor its operating conditions, performance and/or utilization characteristics. It may send information via a wireless, optical and/or wired network to a remote analysis and/or development system and/or service, such as an engineering service, that may determine and return configuration parameters. The configuration parameters may be utilized to adjust antenna and/or MIMO, SIMO, MISO and beamforming configuration, power level, interference rejection, equalizer length, dynamic range, modulation, encoding and/or decoding, analog to digital conversion precision, error detection and/or correction parameters, MAC parameters such as timing thresholds, transmit window size and/or buffer space.

Abstract: Apparatus and methods for envelope tracking calibration are provided. In one embodiment, a method of calibrating an envelope tracker having an envelope shaping table generated at a desired gain compression of a power amplifier is provided. The method includes generating a supply voltage for the power amplifier using the envelope tracker, operating the supply voltage of the power amplifier at a first voltage level associated with substantially no gain compression of the power amplifier, and measuring an output power of the power amplifier at the first voltage level. The method further includes decreasing a voltage level of the supply voltage one or more times and measuring the output power at each voltage level, determining a second voltage level of the power amplifier associated with a gain compression equal to about that of the desired gain compression, and calibrating the envelope tracker based on the determination.

Abstract: The present specification describes techniques and apparatus that enable wireless devices to communicate effectively at short ranges. In one implementation, the transmit power of a transmitting device is reduced to permit a receiving device to demodulate a signal.

Abstract: A receiver is provided that receives signals from a device under test (DUT) for one or more modes of operation. For each mode, the system detects beacon transmission signals from the DUT, and counts the number of beacons for a period of time. If the count is not consistent with an expected count, e.g. a stored value, the system may preferably provide an output to indicate that there is a problem with the DUT. If the count is consistent with the expected count, the system may preferably perform further testing for other modes of operation. If the count output of the DUT is consistent with expected counts over each of the operation modes, the system may provide an indication that the DUT has passed the beacon tests.

Abstract: In a wireless communication device, in a correction value calculating mode, a control unit flips switches to the “a” sides, a modulation processing unit generates a CW signal as an I channel signal, a DAC converts the digital CW signal into an analog CW signal, an LPF eliminates the high-frequency component from the CW signal, a mixer functions as an up-converter for up-converting the CW signal, a PA amplifies the RF power of the CW signal, a mixer functions as a down-converter for down-converting the CW signal, an ADC converts the analog CW signal into a digital CW signal, a level detecting unit detects the voltage level of the CW signal, a correction value calculating unit calculates a correction value based on the detected voltage level, and a correction value storing unit stores the calculated correction value.

Abstract: Embodiments are disclosed of a switchplexer for performing test operations on a radio device. The switchplexer comprises a plurality of test ports corresponding to a plurality of radio device ports and a plurality of switches for routing test signals between the individual test ports. Processing logic is disclosed for controlling actuation of the switches to route test signals between individual test ports. The switchplexer disclosed herein may be incorporated into a mobile test device for self-test operations or may be used in a manufacturing or maintenance facility for testing and calibration operations.

Abstract: The invention provides circuitry integrated into a silicon chip that measures aspects of an RF signal on a transmission line in order to provide data that is ultimately used by an antenna tuner circuit to substantially match the impedance of the antenna with that of the transmission line providing the RF frequency to be transmitted.

Abstract: Test systems for characterizing devices under test (DUTs) are provided. A test system for testing a DUT in a shunt configuration may include a signal generator and a matching network that is coupled between the signal generator and the DUT and that is optimized to apply desired voltage/current stress to the DUT with reduced source power. The matching network may be configured to provide matching and desired stress levels at two or more frequency bands. In another suitable embodiment, a test system for testing a DUT in a series configuration may include a signal generator, an input matching network coupled between the DUT and a first terminal of the DUT, and an output matching network coupled between the DUT and a second terminal of the DUT. The input and output matching network may be optimized to apply desired voltage/current stress to the DUT with reduced source power.

Abstract: Aspects of a method and system for calibrating a power amplifier are provided. In this regard, one or more reference signals may be generated and may be utilized to characterize a signal strength indicator (SSI). Additionally, measurements of power output by a power amplifier by the SSI may be corrected based on the characterization of the SSI. Accordingly, the power amplifier may be adjusted based on the corrected measurements. The reference signals utilized to characterize the SSI may be limited to a determined range. In this regard, signal strength of the reference signals, as measured by the SSI, may be compared to the expected signal strength in order to characterize the SSI. The SSI may be characterized over a range of frequencies and/or signal strengths. Similarly the power amplifier may be adjusted over a range of frequencies and/or signal strengths.

Abstract: A composite wireless device including a WLAN device and a BT device. The composite wireless device includes a wireless-channel control unit that determines usable FH channels that can be used for frequency hopping of the BT device, based on communication quality information of the WLAN channel, and notifies the BT device of the usable frequency bands, and a BT-communication control unit that acquires communication quality information of an extended frequency band, which is a frequency band other than the usable frequency bands, as extended communication quality information. The wireless-channel control unit adds the FH channels in the WLAN channel, which are determined as being unused based on the extended communication quality information, as the usable FH channels.

Abstract: An R.F. transmitter circuit has an amplifier (30), a matching network (40) coupled to an output of the amplifier, a programmable resistance (35) coupled to the output of the amplifier, and a controller (60) arranged to control the programmable resistance, and to determine a matched output impedance of the amplifier by detecting a change in the amplifier output for different values of the programmable resistance. This output impedance can be used to adjust the matching to achieve optimum gain or optimum efficiency or other characteristic, during manufacture, test, or in use.

Abstract: An apparatus for power management for use in a mobile device includes an RF (Radio Frequency) circuit, a power amplifier, a processor, and a DC to DC (Direct Current to Direct Current) converter. The processor is configured to generate a baseband signal. The RF circuit is configured to generate an RF signal according to the baseband signal. The power amplifier is configured to amplify the RF signal according to a supply voltage so as to generate an output signal. The processor is configured to detect an envelope of the RF signal, and to generate a control signal according to the envelope of the RF signal. The DC to DC converter operates in an APT (Average Power Tracking) mode or an ET (Envelope Tracking) mode so as to generate the supply voltage.

Abstract: A computer is supplied with information about a measurement sequence to be implemented by a medical imaging system, and determines at least one group of preliminary control sequences for power supply devices of the medical imaging system so that the power control devices are caused to control image-influencing emission devices of the imaging medical system corresponding to the control sequences. Using a model of the image-influencing emission devices and their respective power control devices, and their respective initial load state, the computer determines whether a load state curve for those devices is below a load limit, and emits a final control sequence for those devices that are determined to be below the limit.

Abstract: Some embodiments of the present disclosure relate to a feedback receiver comprising a threshold comparator configured to determine if the amplitude of a baseband signal is within a selection corridor (e.g., defined by an upper and lower threshold value). If the amplitude is within the selection corridor, a feedback receiver is configured to accumulate RF signal samples (e.g., amplitude and phase samples) over a time period. The accumulated RF signal samples, which correspond to substantially constant baseband amplitude values, are then averaged. The calculated averages are utilized for impedance measurements used tune an antenna tuner to limit impedance mismatch. By limiting RF amplitude and phase sample collection to associated baseband signals having an amplitude falling within the selection corridor, substantially equal average amplitudes and phases can be achieved over a relatively short measurement period (i.e., without the need for long measurement period).

Abstract: The disclosure discloses a method for processing/testing of a called terminal and a Long Time Evolution (LTE) system. The method comprises that: a network side of the LTE system sends a paging message to the terminal residing in an LTE cell which is called by a Circuit Switched (CS) domain service; the terminal establishes a Radio Resource Control (RRC) connection with the network side; the terminal sends to the network side a message for requesting to establish a CS domain service; the network side indicates, to the terminal, carrier frequency information of a Global System for Mobile Communications (GSM) cell to which the terminal needs to be redirected; the terminal sends a channel request message to the GSM cell; the terminal performs routing area updating in the GSM cell; the terminal sends a paging response message to the GSM cell; the terminal establishes the CS domain service in the GSM cell.

Abstract: A cooperative system for testing signal strength near a target area selected by a wireless provider is disclosed, using test units installed in the fleet vehicles of an unrelated service enterprise. The system in one embodiment includes an algorithm for comparing test parameters to the route data contained in the dispatch plan for the fleet vehicles, in order to identify the optimal routes on which to send test units. A computer software product for storing the parameters and executing the algorithms is also disclosed. Signal testing in a target area is accomplished through the symbiotic relationship between the testing units and the fleet vehicles, whereby the wireless provider benefits from unit carriage along routes already being traveled by the fleet vehicles for a different purpose. This Abstract is provided quickly inform a reader about the subject matter, and not for use interpreting the scope or meaning of the claims.

Abstract: Systems and methods for radio frequency digital predistortion in a multi-band transmitter are disclosed. In one embodiment, the multi-band transmitter includes a digital upconversion system configured to digitally upconvert digital input signals to provide digital radio frequency signals. Each digital input signal and thus each digital radio frequency signal corresponds to a different band of a multi-band transmit signal to be transmitted by the multi-band transmitter. The multi-band transmitter also includes a radio frequency digital predistortion system configured to digitally predistort the digital radio frequency signals to provide predistorted digital radio frequency signals, and a combiner configured to combine the predistorted digital radio frequency signals to provide a multi-band predistorted digital radio frequency signal.

Abstract: A wireless device includes impedance determination and processing circuitry. The impedance determination circuitry determines load impedance at an output of at least one Radio Frequency (RF) power amplifier of the wireless device. The processing circuitry couples to the impedance determination circuitry and alters at least one operating parameter of the wireless device based upon the determined load impedance.

Abstract: The present invention relates to a data transmission method in a radio communication system, comprising the steps of selecting a first reference transmission antenna of a first base station and a second reference transmission antenna of a second base station from among a plurality of base stations, transmitting a first transmission data stream via the first reference transmission antenna, transmitting a second transmission data stream via the second reference transmission antenna to a terminal, time-delaying the first transmission data stream and retransmitting the delayed first transmission data stream to the terminal via a transmission antenna of a first transmission group, and time-delaying the second transmission data stream and retransmitting the delayed second transmission data stream to the terminal via a transmission antenna of a second transmission group.

Abstract: The present invention relates to a method and apparatus for transceiving data in a wireless communication system. A method for receiving data in a wireless communication system according to one aspect of the present invention is configured such that a base station receives, from a mobile station, a signal including information and data on the transmission mode which the mobile station has selected in accordance with a channel status, and decodes the data in accordance with the transmission mode.

Abstract: A system and method provide for calibrating the frequency response of an electronic filter. The system and method include a radio transmitter with both in-phase and quadrature baseband paths. Each baseband path includes a numerically controlled oscillator (“NCO”), a digital signal path, a digital-to-analog converter (“DAC”), and an analog filter. A low frequency tone is applied from the NCO from one of the baseband path, while a high frequency tone is applied from the NCO in the other baseband path. An analog peak detector at output determines which analog filter has the largest amplitude at the output. The peak detector offset between the two analog filters is offset by stimulating the in-phase and quadrature baseband paths with the respective NCOs to find an amplitude difference between the output signals from the NCOs that makes the output of the analog filters the same.

Abstract: An antenna power coupler having a variable coupling factor is disclosed. In an exemplary embodiment, an apparatus includes a coupler configured to generate a power detection signal based on transmit signal power associated with a plurality of transmission technologies and a variable attenuator configured to apply a selected attenuation factor to the power detection signal to generate an adjusted power detection signal, the selected attenuation factor associated with a selected transmission technology.

Abstract: An EHF communication system including an EHF communication chip. The EHF communication chip may include an EHF communication circuit having at least one controllable parameter-based module having a testable and controllable operating parameter The EHF communication chip may further include a test and trim circuit coupled to the EHF communication circuit, where the test and trim circuit includes a logic circuit having one or more memory elements, where the logic circuit is coupled to the controllable parameter-based module.

Abstract: Unlike sound based pressure waves that go everywhere, air turbulence caused by wind is usually a fairly local event. Therefore, in a system that utilizes two or more spatially separated microphones to pick up sound signals (e.g., speech), wind noise picked up by one of the microphones often will not be picked up (or at least not to the same extent) by the other microphone(s). Embodiments of methods and apparatuses that utilize this fact and others to effectively detect and suppress wind noise using multiple microphones that are spatially separated are described.

Abstract: A transmitter front-end for wireless chip-to-chip communication, and potentially for other, longer range (e.g., several meters or several tens of meters) device-to-device communication, is disclosed. The transmitter front-end includes a distributed power amplifier capable of providing an output signal with sufficient power for wireless transmission by an on-chip or on-package antenna to another nearby IC chip or device located several meters or several tens of meters away. The distributed power amplifier can be fully integrated (i.e., without using external components, such as bond wire inductors) on a monolithic silicon substrate using, for example, a complementary metal oxide semiconductor (CMOS) process.

Abstract: A method for controlling a function is used for an electronic device. The electronic device includes a first sensor and a second sensor. In the method for controlling the function, a first determination result is generated by determining if a neighboring object neighboring to the electronic device belongs to a target species with assist of the first sensor. A second determination result is generated by determining if the neighboring object belongs to an exception species with assist of the second sensor. The function executed by the electronic device is adjusted according to the first determination result and the second determination result.

Abstract: A direct conversion transmitter has a mixer stage to up-convert an input signal to the frequency of a local oscillator (LO). A DC offset circuit is coupled to an input signal port to apply a set of DC offset signal values. A processor determines a set of optimal DC offset signal values by no more than three differential spectral measurements made at the transmitter output port with a test signal applied at the input port. Optimal DC offset signal values are those that, when applied to the input signal at the input port of the transmitter, minimize an LO leakage component of the transmit signal at the output signal port of the transmitter. The optimal DC offset values are stored in memory and retrieved and applied to information bearing signals provided as the input signal once those optimal DC offset values have been determined.

Abstract: Electronic devices with wireless communications capabilities are provided. The electronic device may include storage and processing circuitry, power amplifier circuitry, power supply circuitry, etc. The storage and processing circuitry may direct the power amplifier circuitry to operate using a desired gain mode, in a particular radio channel, and at a given output power level. The power supply circuitry may bias the power amplifier circuitry with a power supply voltage. The performance of the power amplifier circuitry may be characterized by an adjacent channel leakage ratio (ACLR) margin. The power consumption of the power amplifier circuitry may be characterized by a current savings ratio. A cost function may be calculated by taking the product of the ACLR margin and current savings ratio. A minimum point for each cost function curve may be determined. It is desirable to bias the power amplifier circuitry with a supply voltage corresponding to the minimum point.

Abstract: The present disclosure relates to amplitude based pre-distortion calibration of an RF communications terminal, such as a cell phone, by transmitting a first standard RF transmit burst from the RF communications terminal to an RF test instrument, which assimilates the first standard RF transmit burst. A calibration control system extracts information regarding the first standard RF transmit burst from the RF test instrument; determines amplitude based distortion of the RF communications terminal using the extracted information; determines amplitude based pre-distortion calibration information using the determined amplitude based distortion; and calibrates the RF communications terminal using the amplitude based pre-distortion calibration information. By using a single-shot transmit burst, calibration times may be minimized.

Abstract: A transmitter includes a power amplifier driver to amplify a communication signal and a mixer connected with the power amplifier driver, the mixer to output the communication signal to the power amplifier driver. A capacitor and an inductor connect with the mixer and the power amplifier driver. The capacitor and the inductor create a resonant frequency to attenuate frequency components around a determined order of a local oscillator signal.

Abstract: A method for enabling a power amplifier to support multiple powers includes: calculating a transmit power, according to RF parameters delivered by a baseband board, determining a power amplifier voltage according to the transmit power and a corresponding relationship between the transmit power and the power amplifier voltage, and adjusting a supply voltage of the power amplifier, according to the determined power amplifier voltage, so as to adjust an output power of the power amplifier. A RF module includes a conversion module that converts a baseband board signal into a RF signal, an antenna linear device, a storage module, a power amplifier module, an adjustable power module, and a power control module. A test method is employed to determine the relationship between a transmit power and a power amplifier voltage.

Abstract: A transmitter power supply modulates an RF signal without needing to run a calibration/training cycle every time an exciter or PA module is switched in and out or every time the transmitter powers up. During calibration of the exciter module, an exciter module delay factor is determined, and stored in the exciter module, for each signal modulation scheme that may be implemented by the exciter module. During calibration of a power amplifier (PA) module, a power supply modulation (PSM) delay factor is determined for, and stored in, the PA module. During transmitter operation, the exciter module generates RF and envelope signals based on an input signal. The PA module generates a power supply voltage based on the envelope signal and a final delay factor, which final delay factor is based on the exciter module and PSM delay factors. The PA module then modulates the RF signal using the power supply voltage.

Abstract: A computational processor uses a binary signal, being a set of 1- or 0-valued elements of a same number as a number of elements in an input signal, to generate computational data whose elements are exclusive OR values between each element of the input signal and a corresponding element in the binary signal at a same position. The modulator 13 modulates the input signal and the computational data according to a primary modulation scheme, and generates primary-modulated signals. An IFFT calculator applies an inverse fast Fourier transformation to the primary-modulated signals to generate inverse transformation data. A transmitter generates a baseband signal based on generated inverse transformation data whose peak-to-average power ratio matches a standard, and generates and transmits a transmission signal from the baseband signal and data specifying computations conducted to generate the inverse transformation data that matches the standard.

Abstract: A gain adjustment device for a wireless communication circuit comprising a transmission circuit and a reception circuit includes a signal generator and a gain adjustment circuit. The signal generator is coupled to the transmission circuit, and arranged for generating a test signal to the transmission circuit. The test signal transmitted through a printed circuit board such that the reception circuit coupled to the transmission circuit generates a corresponding reception signal in response to the test signal. The gain adjustment circuit is coupled to the reception circuit and the transmission circuit, and arranged for adjusting a transmitter gain configuration and a receiver gain configuration of the wireless communication circuit according to the reception signal.

Abstract: A dynamically-reconfigurable multiband multiprotocol communications jamming system and method is provided that are particularly suited for the generation of effective radio-frequency waveforms/noise output that successively translates up and down the RF spectrum. The system and method are particularly suited for strategically targeting specific frequencies in order to disrupt a communications network or networks, and can be rapidly deployed via delivery platforms, such as artillery and other projectile mechanisms, remote operated vehicles (unmanned aerial, sea or land systems) or targeted air or land delivery via manned assets or automated or robotic support means, or manual delivery by personnel.

Abstract: Technologies and implementations for adapting communication settings in wireless devices are generally disclosed. In one aspect, a method may include receiving data from a sensor included in a wireless device, processing the data to generate an environment parameter related to an environment around the wireless device, determining a propagation channel characteristic based on the environment parameter, and, based at least in part on the propagation channel characteristic, adjusting a physical layer setting in the wireless device.

Abstract: A wireless electronic device such as a portable electronic device may contain a baseband module. Power amplifier circuitry in the device may amplify radio-frequency signals for transmission. During calibration measurements, a computer directs the baseband module to generate control signals that adjust the gain of the power amplifier circuitry. The computer may also direct the baseband module to generate a series of modulated or unmodulated test tones at one or more communications channel frequencies. A power sensor may be connected to the output of the power amplifier circuitry using a transmission line path. The computer and power sensor may be used in making power measurements on radio-frequency signals at the output of the power amplifier while power amplifier gain and test tone frequency adjustments are being made. Power amplifier calibration data may be produced and stored in the electronic device based on the power measurements.

Abstract: Power detectors with temperature compensation and having improved accuracy over temperature are disclosed. In an aspect of the disclosure, variations of a power detector gain over temperature is reduced by varying both the gate and drain voltages of MOS transistors within a power detector. In an exemplary design, an apparatus includes at least one MOS transistor, which receives an input signal, detects the power of the input signal based on a power detection gain, and provides an output signal indicative of the power of the input signal. The at least one MOS transistor is applied a variable gate bias voltage and a variable drain bias voltage in order to reduce variations of the power detection gain over temperature. At least one additional MOS transistor may receive a second variable gate bias voltage and provide the variable drain bias voltage for the at least one MOS transistor.

Abstract: A radio frequency transmitting system which includes first and second amplifiers, a power detector, and a calibration module. The first amplifier amplifies an input signal to generate an amplified signal in accordance with a programmable gain. The second amplifier transmits an output signal based on the amplified signal. The output signal is transmitted at a particular power by the second amplifier. The power detector measures the particular power at which the output signal is transmitted by the second amplifier. The calibration module adjusts the programmable gain of the first amplifier by a calibration offset so that the particular power measurement matches a predetermined power. The calibration module includes offset generation modules that each generate a respective calibration offset candidate based on the particular power measurement. The calibration module also includes a selection module that selects, based on the predetermined power, one of the calibration offset candidates as the calibration offset.

Abstract: The method for memory effects quantification and comparison in RF transmitters and amplifiers is a method in which a processor performs a spectrum analysis of an RF transmitter or RF amplifier device under test (DUT). The processor then calculates a normalized frequency (fn) according to the relation: f n = f - f c BW . The processor then utilizes the normalized frequency calculation in a spectrum asymmetry index (SAI) computation characterized by the relation: SAI = 1 K ? ? f n = f n , start f n = f n , stop ? ? ? P ? ( f n ) - P ? ( - f n ) ? . Next, utilizing the absolute value of the normalized frequency according to the relation: ? f n ? = ? f - f c BW ? , the processor displays the calculated SAI and causes a display device to display a mirrored spectrum as a function of the absolute value of the normalized frequency around a zero frequency.

Abstract: One aspect provides a method of controlling transmit power in a wireless device, wherein a desired transmit power is determined as a result of detection of a receive signal parameter. The method comprises detecting a desired maximum transmit power and generating a sequence of attenuation factors. The sequence is generated by monotonically increasing a variable at a controlled rate between a starting value and the maximum transmit power. The method further comprises using each attenuation factor in turn to: (a) reduce the measured value of the received signal power; and (b) reduce a determined desired value of the transmit power, where the transmit power is continually reduced as the variable is increased.

Abstract: A multipath circuit is described that has multiple signal paths and various common components used for normal operation. Each of the multiple signal paths also has multiple circuit blocks defining the functionality of the signal path. A shared access path is provided through the third winding of a three-way transformer for each signal path. Multiple switches are provided in the multipath circuit that couple to the third winding in each of the multiple signal paths. The switches are also coupled to the various common components. Selected ones of these switches may be closed to provide a shared access path between a common component and one of the signal paths or between a common components and one of the circuit blocks in one of the signal paths.

Abstract: A method for calibrating a channel which includes: performing slide-window correlation on a delayed downlink service signal of a current transmit channel and a feedback signal of the transmit channel, and performing sampling to obtain a group of correlation values of the transmit channel in a sliding window; determining a peak amplitude value among amplitude values of the group of correlation values in the sliding window, and amplitude values at two points that are left adjacent and right adjacent to a point corresponding to the peak amplitude value; performing an interpolation operation on the peak amplitude value and the amplitude values at the two points that are left adjacent and right adjacent to the point to obtain an amplitude value, a delay and a phase at an actual peak point in the group of correlation values of the transmit channel in the sliding window; and calibrating the transmit channel.

Abstract: A method for tuning a digital compensation filter within a transmitter includes: obtaining at least one resistance-capacitance (RC) detection result, wherein the digital compensation filter includes an RC compensation module; and tuning the digital compensation filter by inputting the RC detection result into the RC compensation module. For example, the RC detection result may correspond to a detected value representing a product of a resistance value and a capacitance value. In another example, the at least one RC detection result may be obtained by performing RC detection on at least a portion of the transmitter without individually measuring resistance values of resistors therein and capacitance values of capacitors therein. An associated digital compensation filter and an associated calibration circuit are also provided.

Abstract: When switching the mode of a power amplifier between compressed mode and uncompressed mode, accurate transmission power control is realized. A transmission power control method includes setting a power setting value of mode to switch to, such that an inter-mode output power error is canceled (equal to step ST21), calculating an intra-mode output power error from the power setting value of the mode to switch to (equal to step ST23), calculating a gain linearity value based on the power setting value of the mode to switch to and an output power error of the intra-mode (equal to step ST24), and resetting the power setting value of the mode to switch to based on the gain linearity value (equal to steps ST25 and 26).

Abstract: A method of operating a first access network and a second access network is provided, wherein said access networks serve mobile terminals in an access area and the method comprises: selecting one of said first access network and said second access network on the basis of a power consumption assessment; performing a steering operation for the mobile terminals in said access area, comprising sending steering information to the mobile terminals, the steering information indicating to the mobile terminals to preferably use the non-selected access network not being selected; and setting the selected access network to a power-save mode.

Abstract: Multiple smart meters periodically measure strengths of detected signals generated by fixed position wireless devices. A centrally located location determining system receives this data, and correlates received strengths of the signals generated by the specific fixed position wireless devices with the physical locations of the measuring smart meters. Periodically, updated signal strengths are received, and stored correlations are replaced with updated correlations. Strengths of signals generated by fixed position wireless devices are received from a mobile computing device, as measured by the mobile device. The location determining system compares the signal strengths received from the mobile computing device to the most current strengths of signals of the same fixed position wireless devices, as measured by multiple smart meters, so as to perform triangulation and determine the physical location of the mobile device.

Abstract: An amplifier configured to handle oscillation is disclosed. The amplifier monitors a signal ratio to determine when the amplifier is oscillating. The gain is reduced when oscillation is detected and the amplifier is allowed to operate normally when oscillation is not detected.

Abstract: An equal gain composite beamforming technique which includes the constraint that the power of the signal output by each antenna is the same, and is equal to the total power of the transmit signal divided by the number N of transmit antennas from which the signal is to be transmitted. By reducing output power requirements for each power amplifier, the silicon area of the power amplifiers are reduced by as much as N times (where N is equal to the number of transmit antennas) relative to a non-equal gain composite beamforming technique.