Abstract: A processor of a satellite radio wave receiving device processes radio waves received by a receiver to identify a bit value in each of divided unit time segments that are obtained by dividing a time period of one bit into a plurality of unit time segments of equal duration; creates a bit array having the identified bit values in respective divided unit time segments by sequentially arranging the identified bit values in an order of receipt, the one or more processors creating said bit array in a plurality by successively shifting a time at which the bit array starts by one unit time segment; and performs a bit edge detection operation by detecting a head timing of the bit data at which a bit value changes in the received radio waves based on said plurality of bit value arrays.

Abstract: A method and system are provided for a terminal to measure channel quality and transmit channel state information to a base station in a wireless mobile communication system operating in a multi-carrier-based multiple access scheme such as Orthogonal Frequency Division Multiple Access (OFDMA). The feedback information transmission method of a terminal in a mobile communication system includes receiving configuration information corresponding to at least two reference signals from a base station, receiving, at the terminal, feedback configuration information for measuring the at least two reference signals and generating feedback information based on a measurement result, receiving, at the terminal, the at least two reference signals, and transmitting, by the terminal, the feedback information at timings indicated in the feedback configuration information.

Abstract: A system and method for setting analog front end in a serial receiver. The serial receiver includes a decision feedback equalizer. During initialization, taps of the decision feedback equalizer other than the zeroth tap are disabled, and the zeroth tap is used to estimate the amplitude of the signal at the output of the analog front end. The analog front end gain is iteratively adjusted until the estimated value of the zeroth tap is within a set range.

Abstract: In one or more embodiments, a plurality of PLC endpoints and a data processing circuit are configured to share information, in the form of data blocks over power lines in a power line communication (PLC) network. A first signal representing a transmitted one of the data blocks is received over a first one of the plurality of different communication channels. A second signal representing the transmitted one of the data blocks is received over a second one of the plurality of different communication channels. Information carried by said one of the data blocks is discerned, as a function of a signal versus noise measure associated with the first signal and the second signal, by combining energy from the first and second signals, and converting the combined energy for generating output data.

Abstract: An integrated analog to digital converting and digital to analog converting (ADDA) RF transceiver for satellite applications, configured to replace conventional analog RF down and up conversion circuitry. The ADDA RF transceiver includes one of more ADCs, DSPs, and DACs, all on a single ASIC. Further, the circuitry is to be radiation tolerant for high availability and reliability in the ionizing radiation environment present in the space environment.

Abstract: Embodiments of this disclosure provide an apparatus and method for generating a transmitting sequence, a training sequence synchronization apparatus and method, an apparatus and method for estimating channel spacing and a system. The training sequence synchronization apparatus includes: a delay correlation processing unit configured to parallelly perform autocorrelation operations of different delay amounts on a receiving sequence containing a periodic training sequence to obtain multiple parallel correlation sequences; a superimposition processing unit configured to perform a superimposition operation on the multiple parallel correlation sequences to obtain a synchronization correlation sequence; and a synchronization extracting unit configured to perform a synchronization position extraction on the synchronization correlation sequence to obtain a synchronization position of the training sequence. With the embodiments of this disclosure, anti-noise performance of the training sequence may be enhanced.

Abstract: Provided is a phased array transmission device including: a plurality of transmission branches, each being provided with a phase shift unit that applies a phase rotation to a baseband signal, a DC offset correction unit that adds a first correction value to an output signal of the phase shift unit, and a mixer that subjects an output signal of the DC offset correction unit to a frequency conversion to a high frequency band; and a correction control unit that calculates a second correction value with which a carrier leak component included in an output signal of the mixer is minimized, for each of a plurality of candidates for a phase rotation amount that is set for the phase rotation, and determines the first correction value on the basis of the second correction value.

Abstract: An embodiment of a system includes a transmitter and a receiver that is remote from the transmitter. The transmitter includes a first number of transmit antennas and a signal generator. The transmit antennas are each spaced from another of the transmit antennas by approximately a distance and configured to provide, at one or more wavelengths that are greater than twice the distance, a channel capacity that exceeds a saturation channel capacity. And the signal generator is configured to generate a second number of signals each having a wavelength that is greater than twice the distance, the second number related to a third number of signal pipes, and to couple each of the second number of signals to a respective one of the transmit antennas. The receiver includes a fourth number of antennas and a signal analyzer.

Abstract: An embodiment of a system includes a first number of antennas, a transmitter, and a receiver. The antennas are each spaced from another of the antennas by approximately a distance and are configured to provide, at one or more wavelengths that are greater than twice the distance, a channel capacity that exceeds a saturation channel capacity. The transmitter is configured to generate a second number of signals each having a wavelength that is greater than twice the distance, the second number related to a third number of signal pipes, and to couple each of the second number of signals to a respective one of the antennas. And the receiver is configured to receive from at least one of the antennas a fourth number of signals each having a wavelength that is greater than twice the distance, and to recover information from each of the fourth number of signals, the fourth number being related to the third number.

Abstract: A frequency synthesizer 11a outputs a periodic signal r(t) at a frequency detuned by a predetermined frequency ?f [Hz] from a frequency of 1/integer of a frequency of a reference clock signal f0 synchronized with a signal to be measured ws. A first sampler unit 12 samples the signal to be measured ws at a timing of the trigger signal CLK. A second sampler unit 13a samples an I signal I(t) at the timing of the trigger signal CLK. A phase shifter 13b outputs a Q signal Q(t) obtained by shifting a phase of the reference clock signal f0 by 90°. A third sampler unit 13c samples the Q signal at the timing of the trigger signal CLK. A correction value calculation unit 13d calculates a correction value ?t(n) based on sampling data I(n) and Q(n) and a set value t(n) of a sampling time.

Abstract: A method and system for measuring a device under test are disclosed. In some embodiments, an electromagnetic measurement system to test a device under test, DUT is provided. The system includes, at a central location, an emulator core configured to introduce an impairment in each of at least one transmit signal to produce a digital impaired signal; and at a remote location, a transmitter configured to convert the digital impaired signal to an analog RF signal.

Abstract: A method for diminishing passive intermodulation (PIM) is provided. The method comprises: upsampling an uplink baseband modulated signal; upsampling a downlink baseband modulated signal; determining a time delay for the upsampled downlink baseband modulated signal; time delaying the upsampled downlink baseband modulated signal by the determined time delay; estimating a third order PIM distortion (PIMD) product by filtering the time delayed, upsampled downlink baseband modulated signal with a third order power series kernel; generating a first filtered signal by subtracting the estimated third order PIMD product from the upsampled downlink baseband modulated signal; estimating a Nth order PIMD product by filtering the time delayed, upsampled downlink baseband modulated signal with a Nth order power series kernel; generating a nth filtered signal by subtracting the estimated Nth order PIMD product from the n?1th filtered signal; and downsampling the nth filtered signal.

Abstract: A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.

Abstract: An integrated analog to digital converting and digital to analog converting (ADDA) RF transceiver for satellite applications, configured to replace conventional analog RF down and up conversion circuitry. The ADDA RF transceiver includes one of more ADCs, DSPs, and DACs, all on a single ASIC. Further, the circuity is to be radiation tolerant for high availability and reliability in the ionizing radiation environment present in the space environment.

Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device may modulate a first binary sequence using binary phase shift keying on a first axis of a complex plane. The device may modulate a second binary sequence using binary phase shift keying on a second plane of a complex axis. The first axis and the second axis may be orthogonal. The device may transmit the first binary sequence and the second binary sequence according to the modulation of the first binary sequence and the second binary sequence.

Abstract: In a communications system having an analog channel configured to convey a data signal from a transmitter to a receiver, a method of mitigating narrow-band impairment imposed by the analog channel on the data signal within a bounded spectral region of a spectrum of the data signal. A transmitter digital signal processor (Tx DSP) applying a first adaptation function to the data signal prior to transmitting the data signal through the analog channel. A receiver digital signal processor (Rx DSP) applying a second adaptation function to the data signal received through the analog channel. The first and second adaptation functions are selected to cooperatively mitigate effects of the narrow-band impairment imposed by the analog channel.

Abstract: A method including receiving, via a frontend of a communication device from a communication link, a cascaded waveform modulation with embedded control signal (CWM-CS); performing time-domain demultiplexing on the CWM-CS to obtain a first waveform modulation signal (W1), a second waveform modulation signal (W2), and a control signal (CS); training a channel equalizer based on the control signal; performing channel equalization on the first waveform modulation signal, the second waveform modulation signal, and the control signal CS; performing time-domain de-multiplexing on the first waveform modulation signal W1, the second waveform modulation signal W2, and the control signal CS; applying a rounding function to the first waveform modulation signal W1; generating a recovered signal (S), by summing the first waveform modulation signal W1 and the second waveform modulation signal W2; recovering data from the recovered signal S; and recovering control information by demodulating the control signal CS.

Abstract: An apparatus and a method. The apparatus includes a channel estimation (CE) module, including a first input for receiving pilot resource element (RE) observations, a second input for receiving data RE observations, a third input for receiving log-likelihood ratios (LLRs), and an output; a detector, including a first input connected to the output of the CE module, a second input for receiving data RE observations, and an output connected to the third input of the CE module; and a decoder, including an input connected to the third input of the CE module, and an output.

Abstract: A method performed by a base station of enabling a User Equipment, UE, to determine a precoder codebook in a wireless communication system is provided. The base station transmits (303) to the UE, information regarding precoder parameters enabling the UE to determine the precoder codebook. The precoder parameters are associated with a plurality of antenna ports of the base station. The precoder parameters relate to a first dimension and a second dimension of the precoder codebook. The plurality of antenna ports comprises a number NT of antenna ports that is a function of a number Nh of antenna ports in the first dimension, and a number Nv of antenna ports in the second dimension.

Abstract: A sequence detector is provided for detecting symbol values corresponding to a sequence of input samples obtained from a transmission channel. The sequence detector comprises a branch metric unit (BMU), a path metric unit (PMU) and a survivor memory unit. The branch metric unit calculates branch metrics for respective possible transitions between states of a trellis. The path metric unit accumulates branch metrics provided by the branch metric unit in order to establish path metrics. The survivor memory unit selects a survivor path based on the path metrics and outputs a survivor sequence of the detected symbols corresponding to the survivor path. The sequence detector is configured such that the synchronization length is different than the survivor path memory length.