Abstract: An example apparatus for establishing a communications link is provided. The example apparatus may include a phased array antenna, a radio frequency beamformer, and a processor. The processor may be in operable communication with the radio frequency beamformer and configured to operate as an antenna controller. As the antenna controller, the processor may be configured to direct the radio frequency beamformer to steer an antenna beam generated by the phased array antenna in a plurality of beam directions across an operating range of the phased array antenna, determine a signal strength of a source signal received by the phased array antenna at each beam direction, determine a current beam direction, and direct the radio frequency beamformer to steer the antenna beam to the current beam direction.

Abstract: The present invention relates to a method of operating a communications network, comprising the steps of: receiving a plurality of packets from a network node; determining a first parameter based on the time period between the reception of a packet and the reception of the subsequent packet; determining a second parameter based on the variation of the first parameter; and determining the performance of the communications network in accordance with the ratio of the second parameter to the first parameter.

Abstract: Provided is a stream signal transmission device that can eliminate transmission delay fluctuation with a fast change such as network jitter with high accuracy and synchronize a plurality of streams. The stream signal transmission device includes at least one reception unit that receives a stream signal to which a time code is attached from a network, at least one extraction unit that extracts the time code from the stream signal received by the reception unit, and at least one delay control unit that determines an output time by adding a predetermined fixed delay to a time indicated by the time code extracted by the extraction unit, and outputs the stream signal received by the reception unit after holding the stream signal up to the output time.

Abstract: An electrically small receiver system is provided. The receiver system includes a plurality of antennas and a signal processing circuit. The plurality of antennas includes a first antenna configured to receive a first signal and a second antenna configured to receive a second signal. The signal processing circuit includes a phase shifter configured to apply a phase shift to the received second signal. The phase shift applied by the phase shifter is a function of an angle of incidence of the second signal measured relative to a boresight direction of the plurality of antennas. The signal processing circuit is configured to form an output signal that is a combination of the received first signal and the phase shifted second signal.

Abstract: A multi-mode power amplifier includes a high-power mode amplifier circuit, a mid-power mode amplifier circuit, and a low power amplifier circuit, where the low-power mode amplifier circuit comprises a plurality of independently selectable power cell/amplifier branches. The multi-mode power amplifiers selectively enable or disable amplifier branches to provide multiple levels of amplification. Selectively enabling certain of a plurality of split collector amplifier branches provides multiple low power and ultra-low power amplifier modes without the impedance mismatch or board layout problems associated with an RF switch.

Abstract: Provided are a receiving apparatus and method for a wireless communication system using multiple antennas. A receiving method for a wireless communication system using multiple paths, the receiving method comprising: receiving signals through a predetermined number of multiple paths; sensing a carrier according to saturation state degrees of the signals, and providing saturation state information; calculating automatic gain components of the received signals by using the received signals and the saturation state information of the received signals; and performing a noise matching process to amplify noises on the predetermined multiple paths according to the automatic gain components during a predetermined period.

Abstract: Some embodiments of the present disclosure relate to transmission techniques that result in power savings relative to previous solutions. These techniques often transmit a signal-of-interest by using two paths, namely, a transmission path (which includes a power amplifier) and a control path. The signal-of-interest is evaluated in “fast-track” fashion on the control path, such that the control path can “tune” a DC supply signal provided to the power amplifier. Thus, when a delayed version of the signal-of-interest is provided over the transmission path to the power amplifier, the DC supply signal provided to the power amplifier helps ensure that the power amplifier has “just enough” DC supply to ensure reliable operation without dissipating excess power. In this way, the techniques disclosed herein help to reduce power consumption in transmitters, thereby potentially helping to extend battery life and reduce undesired heating for users.

Abstract: A system for mitigating radio frequency (RF) interferences. The system may comprise an interference cancellation module communicatively coupled with a first antenna, the interference cancellation module configured for mitigating interferences from a second antenna by phase shifting a signal receivable at the first antenna according to a phase shift value, the phase shift value being predetermined when the second antenna is oriented in an initial directional orientation. The system may further comprise a variable RF delay module communicatively coupled with the interference cancellation module, the variable RF delay module configured for determining a current directional orientation of the second antenna, the variable RF delay module further configured for providing a phase compensation value based upon the current directional orientation of the second antenna.

Abstract: A multi-mode power amplifier includes a high-power mode amplifier circuit, a mid-power mode amplifier circuit, and a low power amplifier circuit, where the low-power mode amplifier circuit comprises a plurality of independently selectable power cell/amplifier branches. The multi-mode power amplifiers selectively enable or disable amplifier branches to provide multiple levels of amplification. Selectively enabling certain of a plurality of split collector amplifier branches provides multiple low power and ultra-low power amplifier modes without the impedance mismatch or board layout problems associated with an RF switch.

Abstract: An interfering signal canceller has a passive isolation element fed by an input signal in a primary path. A first frequency converter is in an auxiliary path and is fed by an input signal for converting the input signal to an intermediate or baseband signal. A bandpass filter is tuned to the interfering signal component for passing the interfering signal component of the converted input signal and suppressing the desired signal component. A second frequency converter/phase rotator section has a phase rotator fed by a local oscillator signal and a second frequency converter fed by the phase rotator and the bandpass filter. The second frequency converter/phase rotator section convert and phase adjust the passed the interfering signal component and the suppressed desired signal component to the predetermined band of frequencies. A combiner combines signals in the primary signal path and from the second frequency converter/phase rotator section.

Abstract: An ultra-wideband (UWB) delay and multiply receiver is formed of a receive antenna; a variable gain attenuator connected to the receive antenna; a signal splitter connected to the variable gain attenuator; a multiplier having one input connected to an undelayed signal from the signal splitter and another input connected to a delayed signal from the signal splitter, the delay between the splitter signals being equal to the spacing between pulses from a transmitter whose pulses are being received by the receive antenna; a peak detection circuit connected to the output of the multiplier and connected to the variable gain attenuator to control the variable gain attenuator to maintain a constant amplitude output from the multiplier; and a digital output circuit connected to the output of the multiplier.

Abstract: Some embodiments of the present disclosure relate to transmission techniques that result in power savings relative to previous solutions. These techniques often transmit a signal-of-interest by using two paths, namely, a transmission path (which includes a power amplifier) and a control path. The signal-of-interest is evaluated in “fast-track” fashion on the control path, such that the control path can “tune” a DC supply signal provided to the power amplifier. Thus, when a delayed version of the signal-of-interest is provided over the transmission path to the power amplifier, the DC supply signal provided to the power amplifier helps ensure that the power amplifier has “just enough” DC supply to ensure reliable operation without dissipating excess power. In this way, the techniques disclosed herein help to reduce power consumption in transmitters, thereby potentially helping to extend battery life and reduce undesired heating for users.

Abstract: A signal processing apparatus includes: clip detector means that detects presence/absence of a clipped part with a deformed waveform in each of N audio signals output from N microphones (where N is an integer equal to or greater than 2) based on a dynamic range of a circuit; and interpolation means that treats an audio signal in the N audio signals which has the clipped part detected by the clip detector means as an interpolation target, and other audio signals as non-interpolation targets, and interpolates the waveform of the clipped part of the interpolation target using the waveform of at least one audio signal in the non-interpolation targets.

Abstract: A method of processing audio information for broadcast to an audience can include changing first audio information from occurring in a first time interval to occurring in a second time interval to provide time-changed audio information. The time-changed audio information can be combined with second audio information that is responsive to the first audio information to provide broadcast audio information.

Abstract: Communicating using a mesh network is disclosed. A frame length used for communicating a packet between a first node and a second node of a wireless mesh network is selected. A route from the first node to the second node is determined including one or more intermediate nodes that receive and transmit the packet. Node to node communications within the frame along the route is selected such that a communication latency time is below a predetermined limit time for a predetermined percentage of communications between the first node and the second node.

Abstract: Systems are presented in which a network database is populated and updated with delay values representing measured network delays in routing calls between call control entities of a communications network. The network entities can query the database to make informed decisions regarding call routing based on the delay values, and the database entries are provided by the network elements, which measure actual or pseudo calls routed in the network.

Abstract: A receiving apparatus includes an amplification section that amplifies a received signal and a frequency conversion section that converts a frequency of the received signal, from a radio frequency to a baseband, the baseband having a lower frequency than the radio frequency. A gain control section amplifies, by a predetermined gain, the signal that has been subjected to the frequency conversion to the baseband. A voltage calibration section performs calibration on an offset voltage generated in the signal subjected to frequency conversion to the baseband. A time constant control section sets a first time constant during a reception operation and sets a second time constant, which is reduced with respect to the first time constant, during the calibration.

Abstract: A method of processing audio information for broadcast to an audience can include changing first audio information from occurring in a first time interval to occurring in a second time interval to provide time-changed audio information. The time-changed audio information can be combined with second audio information that is responsive to the first audio information to provide broadcast audio information.

Abstract: There present description is directed to a method and a system for determining a time delay between a transmission and a reception of an RF signal in a noisy environment. The method comprises: transmitting the RF signal according to a transmit frequency pattern, the transmit frequency pattern comprising at least three pulses separated by a period of time, each one of the at least three pulses respectively being at each one of at least three different frequencies; receiving a received RF signal comprising the at least three pulses at the at least three different frequencies, each one of the at least three different frequencies associated to a receive phase change; comparing the receive phase change of one of the at least three different frequencies with the receive phase change of another one of the at least three different frequencies to obtain a dispersion phase difference; and calculating the time delay using the obtained dispersion phase difference.

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: A timing generator and methods thereof are provided. In a first example method, a timing control signal may be produced by generating a base clock signal and a higher delay resolution clock signal, a clock cycle of the higher delay resolution signal being less than a clock cycle of the base clock signal. A first control word output signal may be generated by synchronizing a control word with the base clock signal. A second control word output signal may be generated by synchronizing the first control word output signal with the higher delay resolution clock signal and generating at least one additional control word output signal based on the second control word output signal and the higher delay resolution clock signal, the first, second and at least one additional control word output signal each having different delay resolutions.

Abstract: A packet detector for a multi-band orthogonal frequency division multiplexing system includes a plurality of packet detection units each corresponding to a time frequency code for detecting packets according to a spreading sequence of the time frequency code, a comparison unit for comparing correlation values provided by division units of the plurality of packet detection units, and a packet decision module for determining a time frequency code and size of a fast Fourier transform sampling window according to output signals of the comparison unit, allowing a frequency band to be selected and synchronization to be executed.

Abstract: A reception apparatus capable of calibrating a DC offset voltage fast and with high accuracy even in an environment in which interferer exist without causing noise characteristic degradation. In this apparatus, a digital signal processing section (108) controls the gain of a received signal at such a gain that predetermined reception quality is obtained. A time constant control circuit (110) controls the time constant and makes the amount of attenuation of the received signal of a low pass filter (106a) more moderate compared to the case where a DC offset voltage is not calibrated during DC offset voltage calibration. A voltage calibration circuit (111) calibrates the DC offset voltage generated in the received signal when controlling the gain.

Abstract: A circuit for transmitting a signal has a first signal line and a second signal line, wherein the second signal line is arranged adjacent to the first signal line, such that an interaction between signals being transmitted on the signal lines takes place. The circuit further comprises a first driver for driving a first signal on the first signal line, wherein the first signal comprises a delay. A second driver is configured for driving a second signal on the second signal line depending on the delay of the first signal, such that the delay of the first signal is adjusted due to the interaction of the second signal on the first signal. A method and computer program are also disclosed.

Abstract: A method of processing audio information for broadcast to an audience can include changing first audio information from occurring in a first time interval to occurring in a second time interval to provide time-changed audio information. The time-changed audio information can be combined with second audio information that is responsive to the first audio information to provide broadcast audio information.

Abstract: An RF switch is disclosed. Power of an amplifier installed in an RF switch of a TV receiver is adjusted by using a Schmitt trigger circuit. If an output voltage of an RF automatic gain controller of a tuner is greater than a pre-set upper limit threshold value, the amplifier is turned on, whereas if an output voltage of an RF automatic gain controller of a tuner is smaller than a pre-set lower limit threshold value, the amplifier is turned off. Thus, a signal distortion phenomenon that may occur when an infinitesimal signal, a strong signal and several signals with high power levels are adjacent to each other can be avoided, so a performance of a receiving unit is improved.

Abstract: A radio comprises a receiver and a variable delay circuit. The receiver generates an electrical signal. The variable delay circuit delays the electrical signal by a variable delay time and outputs a delayed electrical signal. The variable delay time is manually adjusted to correspond the delayed electrical signal with a display from an external audio and video receiver.

Abstract: A radio receiver comprises a first amplifier to amplify a received radio signal; a quadrature demodulator to demodulate the radio signal amplified by said first amplifier and thereby generate a baseband signal; a second amplifier to amplify the baseband signal; a demodulator to demodulate the baseband signal amplified by said second amplifier; and a gain controller to control timing of a change in a gain of said second amplifier, in case that changing the gain of said first amplifier and the gain of said second amplifier, on the basis of a gain of said first amplifier before and after the change.

Abstract: A signal received under a multipath condition is buffered in storage memories 50a and 50b comprising two banks, and while overlap of write and read is allowed, the received data is supplied to matched filters 60a and 60b as much as possible, in a pipeline manner, and in-phase addition of four symbols per unit is performed in in-phase adders 80a and 80b. In the buffering in storage memories 50a and 50b, processor 40 adaptively changes the search period based on timing information acquired in advance.

Abstract: A speed-up mode control system is operative to generate a speed-up mode signal based on a gain control signal from associated digital circuitry. The speed-up mode signal controls electronics associated with one or more amplifiers to facilitate settling time of an output signal of the amplifier(s) that occurs when the gain of the amplifier changes. The gain control signal also can be delayed to provide a delayed version of the gain control signal for controlling gain of the amplifier(s).

Abstract: In time divisioned, multi-frequency communication air interfaces it is common for a control channel to be defined on a first frequency while traffic channels are carried on other frequencies. A mobile communication device maintains the automatic gain control (AGC) settings for a first frequency while engaged on a second frequency by adjusting the AGC of the first frequency to correspond with changes in the AGC setting for the second frequency before attempting to access the first frequency again. Since, in the communication system, the two signals are transmitted from the same point, the changes in signal level will typically be similar enough that the mobile communication device will not have to perform a new AGC determination when switching back to the first frequency.

Abstract: A vocoder (125) is initialized, prior to processing an initial batch of audio data, from parameters extracted from the first frame of audio data (308, 310, 320, 330, 332). In the instant embodiment, parameters affecting voice encoding, which are based on estimates of direct current bias, are used to program a high pass filter (253) incorporated in the vocoder (125).

Abstract: A radio comprises a receiver and a variable delay circuit. The receiver generates an electrical signal. The variable delay circuit delays the electrical signal by a variable delay time and outputs a delayed electrical signal. The variable delay time is manually adjusted to correspond the delayed electrical signal with a display from an external audio and video receiver.

Abstract: A constant output signal can be achieved by controlling a gain variable amplifier 2 based on a level of an output signal which is derived by variably amplifying a receiving signal S1 (input signal). An AGC output signal S11 is detected by a detector circuit 3. Then, a CPU 5 generates a control signal S8 based on a detected voltage signal S7. An RSSI detector portion 9 detects an RSSI signal S10 corresponding to a transmitting signal level from the receiving signal S1. The transmitting signal level is compared to a preceding transmitting signal level. The control signal from a preceding execution of the gain control is output if the present control signal is lower than the preceding control signal and the present transmitting signal level is reduced below the preceding transmitting signal level.

Abstract: An automatic gain control system is provided. A signal path is configured to receive an input signal. The signal path includes a first amplifier that has a control input. A first signal level detector is coupled to the signal path, the first signal level detector having a signal level output. A gain control device having a first signal level input is coupled to the signal level output of the first signal level detector. The gain control device also has a first control output coupled to the control input of the first amplifier, and a gain control configuration input. A processor, coupled to the gain control configuration input of the gain control device, is configured to monitor operating conditions and to reconfigure the gain control device in response to changes in the operating conditions.

Abstract: A constant output signal can be achieved by controlling a gain variable amplifier 2 based on a level of an output signal which is derived by variably amplifying a receiving signal S1 (input signal). An AGC output signal S11 is detected by a detector circuit 3, then a detected voltage signal S7 is converted into a digital signal by an A/D converter 4 to output it to a CPU 5. Then, the CPU 5 generates a control signal S8 based on the detected voltage signal S7, then an A/D converter 6 converts the control signal S8 into the analogue signal, and then the signal is sent out to the gain variable amplifier 2 to execute gain control. At this time, an RSSI detector portion 9 detects an RSSI signal S10 corresponding to a transmitting signal level from the receiving signal S1, and then the CPU 5 sends out the control signal S8 stored at the time of preceding execution of the gain control when the RSSI signal S10 is reduced below a predetermined threshold value S12.

Abstract: A speed-up mode control system is operative to generate a speed-up mode signal based on a gain control signal from associated digital circuitry. The speed-up mode signal controls electronics associated with one or more amplifiers to facilitate settling time of an output signal of the amplifier(s) that occurs when the gain of the amplifier changes. The gain control signal also can be delayed to provide a delayed version of the gain control signal for controlling gain of the amplifier(s).

Abstract: A method and apparatus is shown for controlling the input gain of a receiver wherein the input gain is controlled by sampling an amplified data signal during a time interval when a positive-going feedback transient from an output terminal of the receiver to an input terminal of the receiver is not present in the amplified data signal. An embodiment of a receiver circuit according to the present invention includes an input amplifier having variable gain determined by a gain control signal, a comparator which compares the amplified data signal from the input amplifier to a detection threshold voltage to produce a demodulated data signal and an analog delay circuit which delays the amplified data signal by a predetermined time interval to produce a delayed data signal. A switch is driven by the demodulated data signal to sample the delayed data signal for input to an automatic gain control circuit.