Abstract: Various example embodiments may relate to link adaptation. An apparatus may determine a first signal quality estimate for a signal. The apparatus may further determine a BLER estimate based on acknowledgements or decoding results for data blocks of the signal. The apparatus may further determine a second signal quality estimate for the signal based on the BLER estimate. The apparatus may further determine a signal quality offset based on a difference between the first signal quality estimate and the second signal quality estimate. The apparatus may further determine transmission parameter(s) for at least one subsequent data block based on the first signal quality estimate and the signal quality offset.

Abstract: A transposed delay line oscillator including a mode selection filter and a transposed delay line is provided. An output of the transposed delay line is coupled to an input of the mode selection filter to establish an oscillator loop. Based on the transposed delay line output, the mode selection filter generates a mode selection signal including an isolated oscillatory mode, in a Radio Frequency (RF) band. The transposed delay line receives the mode selection signal for transposition to an intermediate frequency of an intermediate frequency (IF) delay line. The IF delay line includes a delay filter and a phase noise suppression loop configured to suppress de-correlated transposition phase noise resulting from a delay of the delay filter. Suppression of phase noise in the IF delay line enables cancellation of transposition phase noise when transposing the IF delay line output to the RF band.

Abstract: A transposed delay line oscillator including a mode selection filter and a transposed delay line is provided. An output of the transposed delay line is coupled to an input of the mode selection filter to establish an oscillator loop. Based on the transposed delay line output, the mode selection filter generates a mode selection signal including an isolated oscillatory mode, in a Radio Frequency (RF) band. The transposed delay line receives the mode selection signal for transposition to an intermediate frequency of an intermediate frequency (IF) delay line. The IF delay line includes a delay filter and a phase noise suppression loop configured to suppress de-correlated transposition phase noise resulting from a delay of the delay filter. Suppression of phase noise in the IF delay line enables cancellation of transposition phase noise when transposing the IF delay line output to the RF band.

Abstract: Embodiments disclosed herein relate to improving a power output of a transmitter of an electronic device. To do so, the transmitter may include signal selection circuitry to adjust a sign selection signal to accurately transition between polarities of a quadrature (e.g., I or Q) component signal stored in or for which an indication is stored in a storage cell of a radio frequency digital-to-analog converter. The sign selection signal may generate a separate adjusted sign selection signal for each polarity of each quadrature component signal such that a transition of the selection signal between a first value and a second value (e.g., logic high and low) occurs when the respective quadrature (e.g., +/? and I/Q component signal is a logic low. In this way, the signal selection circuitry reduces an error pulse in the output of the transmitter.

Abstract: A vector modulator includes a quadrature component generator, configured to generate an input in-phase signal and an input quadrature signal according to an input radio frequency (RF) signal; a switching circuit, receiving a plurality of bits, comprising a plurality of switches controlled by the plurality of bits, configured to generate an output in-phase signal and an output quadrature signal according to the plurality of bits, where the output in-phase signal and the output quadrature signal are related to input in-phase signal and the input quadrature signal; and a combining module, configured to generate an output RF signal according to the output in-phase signal and the output quadrature signal.

Abstract: A communication apparatus 1 includes a manipulating unit 10, a power generating unit 20 that generates electric power using force externally applied via the manipulating unit 10, a transmitting unit 40 transmitting a signal, and a control unit 60 that causes, when the manipulating unit 10 is manipulated, the transmitting unit 40 to transmit the signal with priority over another process other than the transmission of the signal using first electric power which is part of the electric power generated by the power generating unit 20 and then performs the other process using second electric power other than the first electric power among the electric power generated by the power generating unit 20.

Abstract: The present invention relates to wireless networks and more specifically to systems and methods for selecting available channels free of radar signals from a plurality of 5 GHz radio frequency channels. In one embodiment, the present invention provides a standalone multi-channel DFS master that includes a switch and embedded processor that are programmed to switch a 5 GHz radio transceiver to a first channel of the plurality of 5 GHz radio channels, cause a beacon generator to generate a beacon in the first channel of the plurality of 5 GHz radio channels, cause a radar detector to scan for the radar signal in the first channel of the plurality of 5 GHz radio channel, and then repeat these steps for each of the other channels of the plurality of 5 GHz radio channels during a single beacon transmission duty cycle.

Abstract: A signal receiver divides frequency conversion into multiple steps based on a Log2(N) number corresponding to the number N of Nyquist zones that are to be covered. This binary structure used Track and Hold (T/H) amplifiers as samplers for wideband frequency conversion where the frequency coverage is defined by a number of cascaded segments. The receiver system includes a plurality of conversion stages coupled in series with one another. Each conversion stage includes a bandpass filter at its input node with a T/H amplifier configured to receive a respective T/H clock signal. Each conversion stage is either bypassed or implemented depending on the frequency bandwidth being processed. Each bandpass filter is configured to have a respective bandwidth range that differs from the bandwidth range of the other bandpass filters. Each T/H amplifier is configured to receive a respective T/H clock input signal.

Abstract: An acquisition unit acquires a reproduction period of an audio signal, a first transmission delay period of from a transmitting side terminal device or a server device to each of receiving side terminal devices, and a second transmission delay period of from each of the receiving side terminal devices to the server device. A derivation unit derives a response period of from when the reproduction of the audio signal ends to when the right-to-speak is requested, for each of the receiving side terminal devices, by subtracting the reproduction period, the first transmission delay period, and the second transmission delay period from timing when the right-to-speak request signal has been received. A comparing unit compares the derived response period of each of the receiving side terminal devices to grant the right-to-speak to any one of the receiving side terminal devices.

Abstract: An HF-line includes parallel branches with bias terminals, to which a direct voltage source is respectively connected via a first inductor and a second inductor. The inductors are inductively coupled to one another.

Abstract: An envelope tracking power amplifier system time-aligns a supply voltage to an input signal to a power amplifier. The power supply operates in a static mode for low amplitude input signals and operates in a dynamic mode for high amplitude input signals. In the static mode, the power supply produces a substantially constant supply voltage independent of the amplitude of the input signal. In the dynamic mode the power supply produces a dynamically varying envelope tracking supply voltage based on the amplitude of the input signal. A first delay is determined based on portions of the input and output signals captured during static operation of the power supply and a second delay is determined based on portions of the input and output signals captured during dynamic operation. A delay mismatch is estimated based on a difference between the first and second delays.

Abstract: A voltage identification definition (VID) reference voltage generation circuit and a boot voltage generating method thereof are provided. In the boot voltage generating method, a VID reference voltage generation circuit is provided. The VID reference voltage generation circuit includes a preset voltage providing unit, a switch and a VID input signal detection unit. When the VID input signal detection unit detects no input of a VID signal, a control signal is generated to control the switch, such that the preset voltage providing unit provides an adjustable preset voltage.

Abstract: A predistortion system for linearizing the output of a power amplifier includes a first signal representative of an RF modulated signal and a feedback signal representative of nonlinear characteristics of a power amplifier. The system also includes a predistortion controller, comprising at least one lookup table, adapted to receive the first signal and the feedback signal and to generate a correction factor for correcting the nonlinear characteristics of the power amplifier and combining logic which combines the RF modulated signal with a signal corresponding to the correction factor and supplies it to the power amplifier to linearize the output of the power amplifier.

Abstract: A mobile device, having at least one messaging system, a user interface element having variable intensity lighting, a frequency alteration module having selectable frequency modes, an operating mode switch and a data processor coupled to the messaging system, the user interface element, the frequency alteration module and the operating mode switch. The data processor includes at least one software application configured, following the operating mode switch actuation, to adjust the lighting intensity of the user interface element, to change the frequency mode of the frequency alteration module and to provide a customized output. The customized output aggregates the at least one mobile device messaging system.

Abstract: A voltage controlled oscillator outputs an output signal whose frequency corresponds to inputted control voltage. A distributor distributes the output signal outputted from the voltage controlled oscillator. A plurality of injection-locked oscillators regulate self-oscillation frequencies according to the above frequency and output signals obtained by frequency-multiplying signals distributed by the distributor. A combiner combines and outputs the signals outputted from the plurality of injection-locked oscillators. This makes it possible to increase output power while preventing an operating band from narrowing.

Abstract: A communications node includes data defining a division of a communications channel into a plurality of contiguous sub-bands each having N frequency resources, data defining an initial allocation of the frequency resources, a resource determination module operable to apply a frequency shift to the initially allocated frequency resources in accordance with a frequency hopping sequence to determine frequency resources to use for communicating information according to the following: y={x+a(t)N} mod NRB where NRB is the total number of frequency resources in the transmission band; N is the number of contiguous frequency resources in each sub-band; x is the initially allocated frequency resource; y is the frequency hopped resource; t is a time counter; a(t) is the frequency hopping shift applied at time point t, and is an integer value from the set {0, 1, . . . , S?1}; and S is the number of sub-bands; and a transceiver.

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: A frequency-multiplied harmonic suppression RF circuit design method includes the steps of defining respective operating frequencies of predetermined major electronic components of the RF circuit to be designed, using these operating frequencies to calculate the values of respective frequency-multiplied harmonics and intermodulation distorsions, designing respective filters subject to the values of the frequency-multiplied harmonics and intermodulation distorsions obtained, calculating the locations of the frequency-multiplied harmonics in the RF circuit under design, installing the designed filters in the calculated locations, and testing and adjusting the installed filters.

Abstract: A method may include measuring a frequency difference between an actual frequency and an expected frequency associated with a frequency control calibration signal value for each of a plurality of frequency control calibration signal values during a calibration phase. The method may additionally include generating integral non-linearity compensation values based on the frequency differences measured The method may further include generating the applied frequency control signal based on a frequency control calibration signal value received by the digital-to-analog converter during the calibration phase. The method may also include generating a compensated frequency control signal value based on a frequency control signal value received by the integral non-linearity compensation module and an integral non-linearity compensation value associated with the frequency control signal value during an operation phase of the wireless communication element.

Abstract: An electromagnetic Extremely High Frequency (EHF) communication chip includes one or more local oscillator circuits, a transducer circuit and at least one of a modulator or a demodulator coupled to the transducer circuit. Each of the local oscillator circuits may have a local oscillator and configured collectively to generate first and second carrier signals having respective first and second EHF frequencies. The first EHF frequency may be different than the second EHF frequency.The transducer circuit may have a first transducer for transmitting and receiving EHF communication signals. The modulator may be coupled to the local oscillator circuits for modulating the first carrier signal or the second carrier signal with a first transmit base data signal. The demodulator may be for demodulating the first carrier signal or the second carrier signal to produce a first receive base data signal.

Abstract: Disclosed are circuits and methods for reducing insertion loss effects associated with radio-frequency (RF) power couplers. In some implementations, an RF circuit can include a first path configured to route a first RF signal in a first band, and a second path configured to route a second RF signal in a second band. The RF circuit can further include a power detector having a first coupler configured to detect power along the first path, and a second coupler configured to detect power along the second path. The first coupler and the second couplers can be connected in a daisy-chain configuration. The RF circuit can further include an adjustment circuit implemented along at least one of the first path and the second paths. The adjustment circuit can be configured to move a frequency response feature associated with the power detector to a different frequency range.

Abstract: Provided is an apparatus and method for controlling a transmission output of a radio device using a television (TV) band based on a frequency band, the apparatus including a frequency band selecting unit to select frequency bands to be compared, a radio wave attenuation calculation unit to calculate a radio wave attenuation for each of the selected frequency bands, and a transmission output control unit to automatically control the transmission output of the radio device using a TV band based on a difference value among the calculated attenuation values. According to an example embodiment, it is possible to extend a service area while sufficiently protecting a service being provided in the TV band, thereby realizing an efficient use of frequency resources.

Abstract: An integrated circuit comprises frequency generation circuitry for controlling a frequency source for use in an automotive radar system. The frequency generation circuitry comprises low-path modulation circuitry arranged to generate a first, low-path control signal for providing lower frequency modulation of the frequency source, the low-path modulation circuitry comprising a Phase Locked Loop (PLL) arranged to generate the low-path control signal for controlling the frequency source and a fractional-N divider located within a feedback loop of the PLL, and frequency pattern control module operably coupled to the fractional-N divider and arranged to control the fractional-N divider, by way of at least a first, lower frequency pattern control signal. The frequency generation circuitry further comprises high-path modulation circuitry arranged to generate a second, high-path control signal for providing higher frequency modulation of the frequency source.

Abstract: Exemplary embodiments include a frequency modulation (FM) transmitter and a non-FM receiver, which may be implemented on the same IC chip. The FM transmitter may include a digital FM modulator, a lowpass filter, an amplifier, and an LC tank circuit. The digital FM modulator may receive a digital input signal, perform FM modulation with the digital input signal, and provide a digital FM signal. The lowpass filter may filter the digital FM signal and provide a filtered FM signal. The amplifier may amplify the filtered FM signal and provide an output FM signal. The LC tank circuit may filter the output FM signal. The digital FM modulator may perform FM modulation by changing a variable divider ratio of a multi-modulus divider within a PLL. A delta-sigma modulator may receive the digital input signal and generate a modulator output signal used to obtain the variable divider ratio.

Abstract: Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc) of the carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a hasehand information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal.

Abstract: A method for searching for a broadcast/multicast single frequency network cluster, when a terminal needs to receive the broadcast/multicast service in the broadcast/multicast single frequency network cluster, the terminal synchronizes to a non broadcast/multicast single frequency network cell which is associated with the broadcast/multicast single frequency network cluster; and the terminal searches for the broadcast/multicast single frequency network cluster on the basis of the information indicated by the system information in the non broadcast/multicast single frequency network cell. So that the UE can search for the corresponding MBSFN cluster, and can receive the MBMS service in the searched MBSFN cluster.

Abstract: A feedback loop is used to determine phase distortion created in a signal by directly extracting the phase distortion information from a feedback signal using original frequency modulation information.

Abstract: A frequency control device receiving a signal transmitted from each of a plurality of mobile stations, the frequency control device includes a first detecting unit to detect a frequency deviation generated from the signal, a second detecting unit to acquire information about at least a current position or movement of each of the mobile stations as classification information, and a classifying unit to classify mobile stations estimated to be moving in a same moving direction with a same moving speed as a first mobile station based on the classification information. The frequency control device includes a first calculating unit to calculate a first frequency deviations of a signal received from the first mobile station, and a compensation unit to compensate the frequency deviation of the signal received from the first mobile station based on the first frequency deviation.

Abstract: A facility for performing employing multiple frequencies in a secure distributed hierarchical convergence network is described. The facility receives a signal in a first frequency, converts the received signal to an internal representation, applies a business rule to the converted signal, and, when the business rule indicates that the signal should be transmitted in a second frequency, causes the internal representation of the signal to be translated to a second frequency and transmitted in the second frequency.

Abstract: A system is configured to enable polarization alignment. The system includes at least one transmitter or receiver capable of polarization alignment. The transmitter includes at least one cross-polarized antenna and the receiver includes at least one cross-polarized antenna configured to receive a signal. A polarization processor in the transmitter or the receiver is configured to cause a polarization orientation of the at least one cross-polarized antenna to align with a polarization orientation of the signal.

Abstract: A system includes a generator and at least one device. The generator includes a waveform oscillator and a blanking pulse generator. Each device includes a transmit antenna, a receive antenna, an antenna unit, a mixer and a detector. The antenna unit includes a receiver coupled to the receive antenna, an amplifier coupled to the receiver and a transmitter coupled to the transmit antenna and the blanking pulse generator. The mixer has inputs coupled to the amplifier and the waveform oscillator. The detector is coupled to the mixer.

Abstract: Peak power reduction in transmit chains of multi-band radiocommunication devices is performed. By using knowledge of the phase transformations which occur at the upconverter to determine how baseband signal samples will combine at the higher (upconverted) frequency, peak prediction and corresponding baseband signal modification can be performed in a way that reduces peak power of the combined signal.

Abstract: A filter circuit including first and second real filters of a zero-IF scheme. The first and second real filters receive an I component and a Q component separated from a reception signal, respectively; and a switch section for producing a complex filter by switchably connecting the first and second real filters through interconnection elements. The switch section further receiving a switching signal for connecting the first and second real filters, thereby switching from the zero-IF scheme to a low-IF scheme.

Abstract: At a transmitting side, during carrier leak adjustment, quadrature modulation means uses a carrier wave having a frequency different from that at a receiving side to quadrature-modulate an outgoing signal. Feedback means feeds a modulated wave resulting from the quadrature modulation back to the receiving side. At the receiving side, quadrature demodulation means quadrature-demodulates the fed back modulated wave. Phase locking means locks the phase of the signal resulting from the quadrature demodulation to match the phase to the phase at the transmitting side. Offset detection means time-averages the phase-locked signal to detect a direct-current offset. At the transmitting side, based on the value of the direct-current offset detected at the receiving side, offset adjustment means corrects a direct-current offset of the outgoing signal to be quadrature-modulated.

Abstract: To provide an adder capable of obtaining an addition signal of a plurality of high frequency signals, and also a power combiner, a quadrature modulator, a quadrature demodulator, a power amplifier, a transmitter, and a wireless communicator, each of which uses the adder. Impedances (Zg, Zh) seen from a common output point (P3) of a plurality of first impedance circuits (110a, 110b) toward respective input terminals (102a, 102b) are set so that high frequency currents (Ig, Ih) are approximately zero. An impedance (Zs) seen from a first connection point (P1) toward the input terminals (102a, 102b) is set so that a high frequency current (Is) is approximately zero. An impedance (Zc) seen from the first connection point (P1) toward a circuit (150) is set so that a high frequency current (Ic) is approximately zero. An impedance (Zm) seen from a second connection point (P2) toward a power supply is set so that a high frequency current (Im) is approximately zero.

Abstract: The present disclosure relates to systems, devices and methods related to transmitters, and/or transceivers having a single, tunable oscillator in a dual conversion architecture. In various exemplary embodiments, this transmitter may include: a first mixer configured to receive a first oscillator signal from the single oscillator; a filter configured to band pass filter the converted signal and output a filtered signal; and a second mixer in communication with the filter, configured to receive the filtered signal. This dual conversion transmitter may be configured to receive a communication signal from an input to the transmitter and to output a converted signal based on the first oscillator signal and the communication signal. The second mixer may be configured to receive a scaled version of the first oscillator signal and to output a desired frequency output signal based on the scaled version of the first oscillator signal and the filtered signal.

Abstract: A method for applying a modulation signal to a phase locked loop comprises filtering the modulation signal to provide a low frequency component and a high frequency for application to respectively the feedback and feedforward paths of a phase locked loop. The high frequency component is scaled by a gain factor before being applied to the feedforward path. The low frequency component is also scaled by a gain factor and applied to the feedforward path. The energy in a common low frequency range of the modulation signal and of the loop error signal is estimated, and the gain factors are modified dependent on the measured energy.

Abstract: A nonlinearity calibration system and method for a frequency modulation (FM) transmitter. A nonlinearity calibration system for a FM transmitter includes a digitally controlled oscillator (DCO) with a variable capacitor array. The DCO receives a calibrated fine code for tuning the variable capacitor array to modulate a digitally encoded audio signal transmitted by the FM transmitter to a modulation frequency. The nonlinearity calibration system also includes a nonlinearity estimator for generating an approximation of an integral nonlinearity associated with processing of a fine code to tune the variable capacitor array. The nonlinearity calibration system further includes a subtractor for subtracting the approximation of the integral nonlinearity from the fine code to generate the calibrated fine code.

Abstract: A transmission circuit broadens a controlled bandwidth of a voltage controller while ensuring voltage withstanding ability of the voltage controller. The transmission circuit includes a phase modulator outputting a phase modulation signal and a power amplifier including a transistor. The transmission circuit also includes a collector controller controlling a collector voltage, a base controller controlling a base bias voltage, and a switching controller, which switches, when a level indicated by the power level signal is lower than a predefined value, to control the collector controller in accordance with an amplitude signal and a power level signal, and which switches, when the level indicated by the power level signal is equal to or more than the predefined value, to control the base controller in accordance with the amplitude signal and the power level signal.

Abstract: Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal.

Abstract: A transmitter and a signal amplifier are provided. The signal amplifier includes a digital-to-analog converter converting an input digital signal into an analog signal, a local oscillator signal generator outputting in-phase and quadrature-phase oscillator signals, a first mixer mixing the analog signal with the in-phase local oscillator signal to output an in-phase high frequency signal, a second mixer mixing the analog signal with the quadrature-phase local oscillator signal to output a quadrature-phase high frequency signal, a main amplifier amplifying the in-phase high frequency signal output from the first mixer, and an auxiliary amplifier amplifying the quadrature-phase high frequency signal output from the second mixer.

Abstract: In an idle state transition from a macro mobile network to a femtocell, a mobile station looks for the femtocell to operate in a frequency band typically assigned to a macro network. For normal macro network operations, mobile stations look for base stations operating on various channels, e.g. based on hashing of respective mobile station identifiers. Femtocells generate a pilot beacon on a carrier frequency to enable mobile station acquisition, e.g. to redirect a mobile station to the operating frequency of the femtocell. To avoid the need to continually cycle or hop through all possible macro assigned carrier frequencies, pilot beacon transmissions of a particular femtocell are prioritized to correspond to the mobile station(s) expected to utilize that femtocell, e.g. by using existing network information, provisioning device information or self learning/calculating information regarding the carrier most likely to be used by any particular mobile station expected to use the femtocell.

Abstract: A digital-to-analog conversion circuit operates by selectively discharging members of a plurality of capacitors. Charging of the capacitors occurs during a reset period while digital-to-analog conversion occurs as the capacitors are discharged. Those capacitors that are discharged are selected from the plurality of capacitors based on a digital input. The analog output includes the charge discharged from the capacitors. The capacitors are optionally divided into separate capacitor banks.

Abstract: A modulation circuit for use in a radiofrequency transmitter includes a local oscillator circuit configured to generate one or more local oscillator signals at a desired frequency and with a duty cycle at or about twenty-five percent, and a modulator configured to generate one or more modulated signals responsive to the one or more local oscillator signals and one or more baseband information signals. In at least one embodiment, the modulation circuit includes a modulator comprising a combined mixing and transconductance circuit that includes a transistor circuit for each baseband information signal serving as a modulation input to the modulator. Each transistor circuit comprises a first transistor driven by the baseband information signal and coupling a modulator output node to a corresponding transconductance element, and a second transistor driven by one of the one or more local oscillator signals and coupling the corresponding transconductance element to a signal ground node.

Abstract: A wireless communication system having a terminal unit operates in a reduced noise state during receipt of a wireless transmission from a control unit. The terminal unit includes terminal circuitry, a radio and noise management circuitry. The noise management circuitry partially or fully disables operation of the terminal circuitry during a receipt by the radio. Noise management circuitry may disable a terminal processor, disable interrupts, buffer interrupts and otherwise modify operation of the terminal circuitry to reduce generated radio noise that would otherwise interfere with receipt of data by the radio. The wireless communication system includes noise management circuitry located in a control unit that operates in conjunction with noise management circuitry in a first terminal unit and a second terminal unit to schedule transmissions from the control unit. These scheduled transmissions allow the terminal units to perform required processing functions outside of the reduced noise period.

Abstract: A modulator includes a power driver, a power amplifier, and a heterojunction bipolar transistor (HBT) type device. The power driver is for receiving an amplitude modulation signal and for providing a control signal. The power amplifier is for receiving a phase modulation signal, a bias voltage, and the control signal. The power amplifier is for providing a radio frequency signal as an output based on the phase modulation signal, the bias voltage, and the control signal. The switching device is for coupling the power driver to the power amplifier such that the control signal is provided to the power amplifier in a timely manner.

Abstract: A radio base-station apparatus with improved frame transmission efficiency by avoiding interference of preambles and frame control information between sectors of a cell or between cells with a frequency reuse factor. In the apparatus OFDMA multiple-access processing is performed for each of a plurality of sectors of a cell, and frames made of logical subchannel numbers and OFDMA symbol numbers are configured in synchronization respectively for the plurality of sectors, and offsets are added to the beginnings of given frames such that the preambles and frame control information arranged sequentially from the beginnings of the frames do not overlap on the OFDMA symbol numbers.

Abstract: A transmitter generates first and second constant-envelope radio frequency (RF) component signals having first and second phase angles. The first and second phases are controlled by a phase controller. First and second nonlinear power amplifiers (PAs) are modulated by an amplitude-modulated power supply signal as the first and second constant-envelope RF component signals are amplified. The phase controller controls the first and second phases of the first and second constant-envelope RF component signals, in response to a power control signal, and, in so doing, controls an effective load impedance seen at the outputs of the first and second nonlinear PAs. By controlling the effective load impedance in response to a power control signal, rather than in response to rapid amplitude variations in an input signal envelope, the output power of the transmitter is efficiently controlled over a wide dynamic range even at low output powers.

Abstract: A system and method for operating an FM system and wireless networking system coexistent in a mobile wireless device. A mobile wireless device includes a frequency modulation (“FM”) system that includes an FM transmitter and, optionally, an FM receiver. The mobile wireless device also includes a wireless networking system having a network receiver. The FM system is configured to disable the FM transmitter if an amplitude of a modulating signal provided to the FM transmitter is below a predetermined threshold.

Abstract: Certain aspects of a digital baseband transmitter with digital RF/IF support in GSM/GPRS/EDGE compliant devices may comprise receiving digitized data within a chip. A control signal may be generated within the chip indicating whether the received digitized data is to be processed by an IF processing interface or a digital RF processing interface. The baseband processor has the capability to work together with different kinds of RF chips on the market and since this design is implemented on a single module, most of the circuits are shared which reduces the die size significantly. This design also provides a customer more flexibility to choose among different RF vendors.