Abstract: A remotely controlled electronic circuit breaker including wireless communication circuit which receives control signals from a mobile app. A power-management module is configured to switch a circuit ON or OFF based on the control signal. A method for remotely controlling an electronic circuit comprises receiving, by an electronic circuit breaker, a control signal from a native mobile app, and activating a relay to switch a circuit ON or OFF based on the control signal. A system for remotely controlling an electronic circuit, comprises a smart communication device including a native mobile app for controlling the electronic circuit and an electronic circuit breaker wirelessly connected to receive at least one control signal from the smart communication device, and switch the electronic circuit breaker ON or OFF based on the control signal.

Abstract: A single chip for generating multiple differential signals and loop-through signals according to a single-ended RF signal inputted to the single chip, wherein delays between different channels of the multiple differential signals and loop-through signals can be minimized for supporting picture-in-picture applications; in addition, the single chip can integrate a power detector and an AGC circuit for controlling the gain of an LNA inside the single chip, and the gain of the LNA can be outputted from the single chip for different usages.

Abstract: A radar antenna system includes a single transmitter for creating pulses from a wideband waveform. A splitter divides each pulse into half-power pulses, and sends them along respective paths. On one path, successive half-power pulses are alternately modulated with a phase shift ?A or ?F. On the other path, the half-power pulses are not modulated. Each modulated half-power pulse is then combined with an un-modulated half-power pulse to transmit pulses of a full aperture beam with either ?A or ?F. This establishes two degrees of freedom for the system. Two separate receivers then simultaneously receive the pulse echoes and a signal processor uses the consequent four degrees of freedom to create a radar indicator with mitigated clutter and useable azimuth estimation. A coherent processing interval can then be selected for multi-mode operation of the system.

Abstract: A tactical audio distribution device may include a housing. A plurality of connection jacks may be coupled to the housing. A plurality of microphone input signal connection points may be contained in the housing and may be in electrical communication with at least a portion of the connection jacks. At least one digital audio matrix processor may be contained in the housing. The at least one digital audio matrix processor may be configured to receive audio signals based on audio signals from microphones, to combine those signals into a mixed audio signal, and to output the mixed audio signal. A plurality of headphones output signal connection points may be contained in the housing and be in electrical communication with at least some of the connection jacks and may be configured to receive signals based on the mixed audio signal.

Abstract: In a method of a heterodyne FDD receiver for enabling reception of a multi-band RXRF signal spectrum, an RXRF signal spectrum is received, which comprises a lower frequency band and a higher frequency band. A Local Oscillator, LO, output frequency, fLO, is selected based on a frequency fA of the lower frequency band, and a frequency fB of the higher frequency band. Moreover, the RXRF signal spectrum is frequency shifted into an RXIF signal spectrum, by mixing the RXRF signal spectrum with the LO output frequency fLO. The LO frequency fLO is selected to satisfy fA<fLO<fB, where fA and fB are any frequency of the lower or higher frequency band, respectively.

Abstract: A cellular radio architecture for a vehicle that includes a receiver module having a receiver delta-sigma modulator that converts analog receive signals to a representative digital signal. The architecture further includes a transmitter module having a transmitter delta-sigma modulator for converting digital data bits to analog transmit signals. Portions of the receiver and transmitter modules are fabricated with indium phosphide (InP) technologies and portions of the receiver and transmitter modules are fabricated with CMOS technologies.

Abstract: An audio device and an output method thereof are provided. The audio device includes: an envelope detector configured to detect an envelope of an input audio signal; a power supply which includes a linear power supply (LPS) and a switching-mode power supply (SMPS); an amplifier configured to amplify the input audio signal; an output unit configured to output the audio signal amplified by the amplifier; and a controller configured to compare a voltage level of the detected envelope with a preset level, select one of the LPS and the SMPS based on a result of the comparison, and control the power supply to supply power from the selected one of the LPS and the SMPS to the amplifier.

Abstract: A mobile device includes a first interface module, a second interface module, and a control module. The first interface module is configured to interface the mobile device to a first wireless network and to receive data from a transmitting device via the first wireless network. The second interface module is configured to interface the mobile device to a second wireless network. The control module is configured to determine based on the data received when to switch a link to the transmitting device from the first wireless network to the second wireless network. The control module is further configured to transmit a message that informs the transmitting device not to transmit the data to the mobile device via the first wireless network in response to the link being switched to the second wireless network.

Abstract: An approach is provided for supporting transmission in a multi-input-multi-output (MIMO) communication system including a plurality of terminals. A preamble portion of a frame is transmitted by a multiple transmit antennas of a hub using Orthogonal Frequency Division Multiplexing (OFDM) to the terminals over a channel, wherein each of the terminals determines a characteristic of the channel with respect to the transmit antennas as feedback information. The hub receives the feedback information from the terminals. The hub selects, according to the feedback information, a subset of the antennas for transmission of a remaining portion of the frame to the terminal.

Abstract: The disclosed embodiments include a system and method for quick note messaging. In one embodiment, a call from a calling party to the communication device is intercepted by a network system. The network system is configured to receive a calling party selection to record a quick note message for a user of the communication device prior to connecting the call. The network system monitors for at least one of a termination of the call by the calling party or a time-out threshold. The network system indicates at the communication device if a quick note message has been received. If the calling party selection to record a quick note message is not received, then the network system is configured to handle call processing normally.

Abstract: Methods and systems for processing signals in a receiver are disclosed herein and may comprise receiving spatially multiplexed signals via M receive antennas. A plurality of multiple data streams may be separated in the received spatially multiplexed signals to detect MIMO data streams. Each of the MIMO data streams may correspond to a spatially multiplexed input signal. Complex phase and/or amplitude may be estimated for each detected MIMO data streams utilizing (M-1) phase shifters. Complex waveforms, comprising in-phase (I) and quadrature (Q) components for the MIMO data streams within the received spatially multiplexed signals may be processed and the processed complex waveforms may be filtered to generate baseband bandwidth limited signals. Phase and/or amplitude for one or more received spatially multiplexed signals may be adjusted utilizing the estimated complex phase and amplitude. Phase and/or amplitude may be adjusted continuously and/or at discrete intervals.

Abstract: A radio frequency receiver with dual band reception and dual analog-to-digital converters (ADCs) can be configured to operate in a single channel mode or a dual channel mode to receive a single RF input channel or two RF input channels at the same or different frequency bands. In the single channel mode, the dual ADCs can be used to improve the performance of the receiver for the single input signal or the dual ADCs can be configured for reduced power consumption. In the dual channel mode, the dual ADCs operate on the individual RF input signals to realize dual band reception. In one embodiment, the receiver is configured for asymmetric dual band reception to receive a wideband input signal on a first input signal path and a narrow band input signal on a second input signal path.

Abstract: A mobile device having at least two antennas can circumvent transmission problems caused by a user's grasp of the device. A sensor unit is disposed at a specific location of a device body and creates a sensor signal by detecting the contact or proximity of a particular object such a user's hand. When receiving the sensor signal, a control unit selects one of the antennas depending on the sensor signal and establishes a communication path based on the selected antenna. The selected antenna involved in the communication path is typically relatively free from degradation in transmission caused by a user's grasp of the mobile device. The radiation property of the mobile device, which may be degraded due to a user's grasp, can exhibit relatively little or no degradation as compared to the typical degradation in performance when the mobile device is being grasped.

Abstract: Disclosed is an intermediate frequency processing device for processing both analogue and digital television intermediate frequency signals including vision and sound intermediate frequency signal components, comprising an intermediate frequency signal input for receiving digital or analogue intermediate frequency signals, a processing section, coupled to said intermediate frequency signal input means, for processing intermediate frequency signals, and an output for outputting signals processed in said processing section. The processing section comprises a first band pass filter (1,2,3) connected to said intermediate frequency signal input, and at least two parallel processing portions (4,6a,7,19-22,30-40,42-45;5,6b,8,18,23-29,46) coupled in parallel to said band pass filter (1,2,3), wherein each of said processing portions includes an inphase quadrature processing means (18,23;19,22).

Abstract: A signal processing device includes a device package, processing circuitry and biasing circuitry. The processing circuitry is packaged in the device package and is operative to receive one or more Radio Frequency (RF) input signals from one or more antenna elements via one or more pre-amplifiers that are separate from the device, and to process the RF input signals so as to produce an RF output signal. The biasing circuitry is packaged in the device package and is operative to produce one or more biasing signals for biasing the pre-amplifiers.

Abstract: One embodiment relates to a circuit for efficient wireless communication. The circuit includes an antenna interface module adapted to receive multiple frequency components via an antenna. Multiple reception paths stem from the antenna interface module, where different reception paths are associated with different frequency components. The circuit also includes multiple filter elements having inputs respectively coupled to the multiple reception paths. At least two of the filter elements cooperatively form a differential output signal based on their respective frequency components. Other methods and systems are also disclosed.

Abstract: A Klystron transmitter for use in weather radar systems has a transmitter module for operating with any of various Klystron tubes designed for different frequency ranges, such as a low S-Band range, a high S-Band range, and a C-Band range. Each of the Klystron tubes is designed to have similar operating characteristics, such as output power and operating voltages. In addition, the transmitter module has driver circuitry for driving the Klystron tube of the transmitter, and such driver circuitry is operable over a wide frequency range so that the same driver circuitry can be used for any of the contemplated bands. Accordingly, the same core transmitter circuitry can be used for any of the Klystron tubes allowing a manufacturer to control which of the contemplated bands is implemented by selecting the appropriate Klystron tube and stable local oscillator (STALO) for the desired band.

Abstract: A radio communications system has at least one base station and subscriber station. To transmit messages to a subscriber stations, the base station uses successive emission directions that differ from one another. The base station transmits information concerning the sequence of the use of said emission directions to subscriber stations.

Abstract: A wireless communication apparatus includes: a first unit which is connected in wireless to a base station by radio wave, and which includes: a measuring unit which measures a reception electric field strength of the radio wave in the first unit transmitted from the base station to the first unit; and a transmitter which transmits information of the reception electric field strength measured by the measuring unit; and a second unit which is connected to the first unit, and which includes: a receiver which receives the information of the reception electric field strength transmitted by the transmitter; and a first indicator which indicates on the second unit the information of the reception electric field strength received by the receiver.

Abstract: An exemplary wireless communication apparatus includes a first communication circuit, a second communication circuit, an antenna, and a combiner. The first communication circuit is arranged to process signals according to a first wireless communication protocol working at a first frequency band. The second communication circuit is arranged to process signals according to a second wireless communication protocol working at a first frequency band, wherein the second wireless communication protocol is different from the first wireless communication protocol. The antenna is shared between the first communication circuit and the second communication circuit. The combiner has a first port coupled to the first communication circuit, a second port coupled to the second communication circuit, and a third port coupled to the antenna. In addition, the combiner provides a first signal path between the third port and the first port and a second signal path between the third port and the second port.

Abstract: Methods and systems for processing signals in a receiver are disclosed herein and may comprise receiving spatially multiplexed signals via M receive antennas. A plurality of multiple data streams may be separated in the received spatially multiplexed signals to detect MIMO data streams. Each of the MIMO data streams may correspond to a spatially multiplexed input signal. Complex phase and/or amplitude may be estimated for each detected MIMO data streams utilizing (M-1) phase shifters. Complex waveforms, comprising in-phase (I) and quadrature (Q) components for the MIMO data streams within the received spatially multiplexed signals may be processed and the processed complex waveforms may be filtered to generate baseband bandwidth limited signals. Phase and/or amplitude for one or more received spatially multiplexed signals may be adjusted utilizing the estimated complex phase and amplitude. Phase and/or amplitude may be adjusted continuously and/or at discrete intervals.

Abstract: Systems and methods which utilize low performance circuitry to provide received signal power detection without unacceptably impacting operation of a receiver circuit are shown. Circuitry utilized to provide received signal power detection according to embodiments comprises circuitry dedicated for use with respect to received signal power detection. Performance of the circuitry of the detection path may be lower than that required of circuitry of the signal processing path. However, performance parameters are selected to provide power detection of desired accuracy (e.g., flat gain) and to meet other performance metrics. Embodiments provide a low performance power detection circuit comprising a low performance tuner configuration. Further embodiments provide a low performance power detection circuit comprising a low performance data converter configuration.

Abstract: An approach is provided for supporting transmission in a multi-input-multi-output (MIMO) communication system including a plurality of terminals. A preamble portion of a frame is transmitted by a multiple transmit antennas of a hub using Orthogonal Frequency Division Multiplexing (OFDM) to the terminals over a channel, wherein each of the terminals determines a characteristic of the channel with respect to the transmit antennas as feedback information. The hub receives the feedback information from the terminals. The hub selects, according to the feedback information, a subset of the antennas for transmission of a remaining portion of the frame to the terminal.

Abstract: A receiving apparatus includes a first circuit to receive a radio wave of a first frequency band from a tuning circuit, a second circuit, including an amplifier to receive a radio wave of a second frequency band lower in frequency than the first frequency band, and a generating circuit to generate a tuning voltage for the tuning circuit in a first state in which the radio wave of the first frequency band is received, and a bias voltage for the amplifier in a second state in which the radio wave of the second frequency band is received. The generating circuit includes a voltage generator to generate and output the tuning voltage and the bias voltage to an output route, and a switching circuit to switch the output route to couple to the amplifier in the second state.

Abstract: A receiver can handle different types of reception signals, such as, for example, TV and FM-radio signals. In the receiver, a mixer (MIX) mixes a reception signal with an oscillator signal (OOS) so as to obtain a mixer output signal (MOS), which comprises a frequency-shifted version of the reception signal. An intermediate frequency amplifier (IFAMP) applies an amplified mixer output signal (MOSA) to two different intermediate frequency filters: one for first type reception signals and another for second type reception signals. A switchable coupling section (DBTP, SWA) is coupled between the mixer (MIX) and the intermediate frequency amplifier (IFAMP). The switchable coupling section (DBTP, SWA) is switchable to a first state and a second state. In the first state, the mixer output signal (MOS) substantially reaches an input (IAD) of the intermediate frequency amplifier (IFAMP) via a first coupling path (DTBP).

Abstract: A disclosed method tunes a signal from a channelized spectrum having a predetermined channel spacing. A signal of interest having a predetermined maximum bandwidth is mixed with a local oscillator signal, which has a frequency that is an integer multiple of the channel spacing or one-half of a channel spacing displaced from an integer multiple of the channel spacing. The local oscillator signal is selected to frequency translate the signal of interest to within a near-baseband passband whose lower edge is spaced from DC by at least about the maximum bandwidth of the signal of interest. Problems associated with 1/f noise, DC offsets, and self-mixing products are avoided or substantially diminished. Other methods and systems are also disclosed.

Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.

Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.

Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.

Abstract: A low-noise amplifier in a receiver has a differential mode of operation and at least one single-ended mode of operation. A control signal is used to select between or among the modes and the switching between differential and single-ended operations may be performed on the fly.

Abstract: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.

Abstract: A radio wave receiver that receives two different sets of radio waves and displays intensity of the received radio waves. First and second radio wave processing portions receive respective radio waves and output various kinds of information, such as video information and audio information. A switching portion receives output signals from the first and second radio wave processing portions, and switches the output signals according to a switching instruction of a controller to supply the output signals to a display portion and a speaker. The controller causes the intensities of the received radio waves in respective tuners of the first and second radio wave processing portions to be displayed simultaneously or in a switching manner based on a user's operation irrespective of which tuner's received radio waves are being processed.

Abstract: The present invention is a radio communications system. The system includes a first Line-Replaceable Unit (LRU) and a second Line-Replaceable Unit (LRU). Each LRU includes two transmitters, a multi-channel receiver, a passive hybrid combiner-splitter, and a bypass relay. The first LRU and the second LRU are communicatively coupled via a crosslink connection, such as a coax cable connection. The system includes first and second antennas, which are communicatively coupled with the first and second LRUs respectively. The system includes a crosslink bus configured for communicatively coupling the first and second LRUs, thereby allowing the LRUs to coordinate operation of the relays via the crosslink bus. Still further, the system is configured for providing concurrent transmit and receive operation.

Abstract: Antenna amplifiers and automobile top antenna devices are provided. The antenna amplifier includes an AM frequency selection circuit, an AM signal amplification circuit, an FM frequency selection circuit, an FM signal amplification circuit, and a power circuit. The antenna amplifier is further provided with a trap circuit that has an end connected to the ground terminal of the antenna amplifier, and another end connected to a metal mounting base for an antenna on the automobile top. The antenna device includes a shark-fin antenna case, a metal mounting base, an antenna support and a radio receiving antenna. The antenna case is mounted on the metal mounting base to form an internal accommodation space in which the antenna support, the radio receiving antenna and a circuit board with an antenna amplifier are provided.

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: A dual mode tuner/receiver is disclosed in which both analog and digital signals can be received and processed. A low pass filter allows all channels below a selected frequency enter the circuit. A precisely controlled dual conversion circuit creates an intermediate frequency (IF) signal. An automatic carrier detection circuit monitors the IF signal and determines whether the signal is of analog or digital format and intermediate frequency filters are adjusted based upon the type of signal detected. A coherent oscillator circuit generates in-phase and quadrature reference signals that are used by video and audio detectors for further processing of the IF signal. In-phase and quadrature outputs are provided for digital signals and composite video and audio outputs are provided for analog signals.

Abstract: A signal receiver and a method for separating a RDS signal component from a received signal is described. After the received signal has been downconverted to the baseband, the baseband signal is split up into a first baseband signal for a first signal path and a second baseband signal for a second signal path. The first baseband signal is highpass filtered and forwarded to a frequency synchronization unit that generates a frequency synchronization carrier. The second baseband signal is modified in accordance with the frequency synchronization carrier provided by the first signal path, and a synchronized baseband signal is obtained that still comprises the full range of the RDS signal's spectral components.

Abstract: A disclosed method tunes a signal from a channelized spectrum having a predetermined channel spacing. A signal of interest having a predetermined maximum bandwidth is mixed with a local oscillator signal, which has a frequency that is an integer multiple of the channel spacing or one-half of a channel spacing displaced from an integer multiple of the channel spacing. The local oscillator signal is selected to frequency translate the signal of interest to within a near-baseband passband whose lower edge is spaced from DC by at least about the maximum bandwidth of the signal of interest. Problems associated with 1/f noise, DC offsets, and self-mixing products are avoided or substantially diminished. Other methods and systems are also disclosed.

Abstract: The present invention supports the remote control of a controlled device. A hybrid device receives a control signal over an infrared communications channel or a wireless networking channel. The hybrid device can replace an IR receiver module in the controlled device in order to provide backward compatibility as well as provide universal operation with a wireless networking controller. The hybrid device processes a signal received over one of the communications channels. When a signal is received over the infrared communications channel, the processor converts the signal to an output code that is sent to a device controller. When a signal is received over the wireless networking communications channel, the processor converts the signal to a wireless command, converts the wireless command to an output code, and sends the output code to the device controller. All output codes are transparent for the two communications channels.

Abstract: A multi-mode transmitter architecture is configurable for multiple modulation modes using either polar or polar-lite modulation. Multiplexed signal paths and reconfigurable components are controlled for performance in GMSK and EDGE burst modes. Polar-lite EDGE modulation is programmed by setting a multiplexer coupling a first amplitude modulated signal path with a frequency modulated signal path input to a dual-mode power amplifier for amplification of the combined EDGE transmission signal. In full-polar EDGE modulation, amplitude modulated signal is multiplexed into a second amplitude modulated signal path for A/D conversion and comparison with a polar feedback signal coupled from the power amplifier output. The resulting comparison is applied to a power control port of the power amplifier to amplitude modulate the EDGE transmission output. Multiplexers are configured to disconnect the amplitude modulated paths when operating in GMSK signaling for both full-polar and polar-lite modulation.

Abstract: A low-noise amplifier in a receiver has a differential mode of operation and at least one single-ended mode of operation. A control signal is used to select between or among the modes and the switching between differential and single-ended operations may be performed on the fly.

Abstract: A receiver can handle different types of reception signals, such as, for example, TV and FM-radio signals. In the receiver, a mixer (MIX) mixes a reception signal with an oscillator signal (OOS) so as to obtain a mixer output signal (MOS), which comprises a frequency-shifted version of the reception signal. An intermediate frequency amplifier (IFAMP) applies an amplified mixer output signal (MOSA) to two different intermediate frequency filters: one for first type reception signals and another for second type reception signals. A switchable coupling section (DBTP, SWA) is coupled between the mixer (MIX) and the intermediate frequency amplifier (IFAMP). The switchable coupling section (DBTP, SWA) is switchable to a first state and a second state. In the first state, the mixer output signal (MOS) substantially reaches an input (IAD) of the intermediate frequency amplifier (IFAMP) via a first coupling path (DTBP).

Abstract: An approach is provided for supporting transmission in a multi-input-multi-output (MIMO) communication system including a plurality of terminals. A preamble portion of a frame is transmitted by a multiple transmit antennas of a hub using Orthogonal Frequency Division Multiplexing (OFDM) to the terminals over a channel, wherein each of the terminals determines a characteristic of the channel with respect to the transmit antennas as feedback information. The hub receives the feedback information from the terminals. The hub selects, according to the feedback information, a subset of the antennas for transmission of a remaining portion of the frame to the terminal.

Abstract: A remote signaling receiver system includes a receiver that operates in two different modes of demodulation to accommodate different types of signals from different types of transmitting devices. A first demodulator, preferably an ASK demodulator, is adapted to process signals from a signal transmitter that generates a first type of signal. A second demodulator, preferably one that is not sensitive to amplitude modulation such as a FSK demodulator, is adapted to process signals received from at least one other type of device, which provides a second type of signal. A system designed according to this invention is particularly useful as a remote keyless entry system for a vehicle where one or more sensors are provided on the vehicle to provide an indication of a chosen condition of one or more of the vehicle components.

Abstract: Systems and methods related to amplifier systems which use a predistortion subsystem to compensate for expected distortions in the system output signal. A signal processing subsystem receives an input signal and decomposes the input signal into multiple components. Each signal component is received by a predistortion subsystem which applies a predistortion modification to the component. The predistortion modification may be a phase modification, a magnitude modification, or a combination of both and is applied by adjusting the phase of the fragment. The predistorted component is then separately processed by the signal processing subsystem. The processing may take the form of phase modulation and amplification. The phase modulated and amplified components are then recombined to arrive at an amplitude and phase modulated and amplified output signal. The predistortion modification is applied to the components to compensate for distortions introduced in the signal by the signal processing subsystem.

Abstract: The proposed iterative method concurrently calculates maximum likelihood estimated values for the channel coefficients (h0, . . . , hL; ?h) and the DC offset (d; ?d) on the basis of a training sequence (TSC) in a TDMA mobile communications system. The SAGE algorithm leads to two recursion formulae, by means of which the iterative calculation of estimated values for the channel coefficients (h0, . . . , hL; ?h) and for the DC offset (d; ?d) is provided.

Abstract: Methods and systems for communicating information via a plurality of different networks are disclosed herein. Aspects of the method may comprise receiving broadcast information in a mobile terminal via a VHF/UHF broadcast communication path. Cellular information in the mobile terminal comprising voice and data may be received via at least one cellular communication path. Reception in the mobile terminal may be switched between reception of the broadcast information via the VHF/UHF broadcast communication path and the cellular information via the at least one cellular communication path based on a preference indicated via the mobile terminal. The preference may be indicated via a software-controlled interface and/or a user-controlled interface. Reception in the mobile terminal may be switched between reception of the broadcast information via the VHF/UHF broadcast communication path and the cellular information via the at least one cellular communication path based on user input.

Abstract: A path search circuit according to the present invention has an orthogonal multi-beam forming section 4 for directional reception with a plurality of orthogonal multi-beams orthogonal one to another, correlation-operating sections 61–6M for correlation-operating outputs of the orthogonal multi-beam forming section 4 with a known signal, weight multiplying sections 81–8Nb for multiplying the output of the correlation-operating section 61–6M by a weight converted into a beam space, delay profile generating sections 91–9Nb for generating delay profiles from the output signals of the weight multiplying sections 81–8Nb, and a path detecting section 10 for detecting a reception timing and arrival direction of arrival path from the delay profile. This path search circuit can enhance the accuracy of path direction detection by the use of a directional reception signal, and further reduce the direction dependence of path timing detection accuracy.

Abstract: An interference-signal removing apparatus is provided for removing narrow-band interference signals from input signals including wide-band desired signals and the narrow-band interference signals, which suppresses that even desired signals are removed. The interference-signal removing apparatus includes an extraction section for extracting interference signals from input signals, a removal circuit for removing extracted interference signals from input signals, an extraction control section for controlling extraction of interference signals by the extraction section in accordance with the removal result, and an extraction-amount suppression section for suppressing the interference signal amount to be extracted in accordance with input signals.

Abstract: A method of identifying a signal type uses parameters of the signal as a basis for automatic identification. A signal of interest is selected from a display of a spectral waveform for a specified frequency. An occupied bandwidth for the signal of interest is estimated and, if the occupied bandwidth is common to more than one known signal type, a complementary cumulative distribution function of peak power for the signal of interest is estimated. The signal type may be identified as a function of these parameters. Additionally the frequency of the signal of interest may be compared with a database of spectral assignments for known signal types to provide further information about the signal of interest.