Abstract: Provided are M signal processors that respectively generate modulated signals for M reception apparatuses (where M is an integer equal to 2 or greater), a multiplexing signal processor, and N antenna sections (where N is an integer equal to 1 or greater). When transmitting multiple streams, each of the M signal processors generates two mapped signals, generates first and second precoded signals by precoding the two mapped signals, periodically changes the phase of signal points in the IQ plane with respect to the second precoded signal, outputs the phase-changed signal, and outputs the first precoded signal and the phase-changed second precoded signal as two modulated signals. When transmitting a single stream, each of the M signal processor outputs a single modulated signal. The multiplexing signal processor multiplexes the modulated signals output from the M signal processors, and generates N multiplexed signals. The N antenna sections respectively transmit the N multiplexed signals.

Abstract: Disclosed is a field device adapter for HART communication with a field device. The field device adapter includes an adapter housing with an adapter chamber; arranged in the adapter chamber, an adapter electronics, which is adapted wirelessly to receive a second radio signal and by means of the second radio signal to control a circuit for shunting the communication resistor in such a manner that at least one communication resistor is selectively switchable in and out per radio, so that in a shunted condition a first radio signal received by the adapter electronics can be converted into a, preferably HART based, two conductor signal and modulated via the tapping point onto the loop current.

Abstract: A system includes a processor and a memory. The memory stores instructions executable by the processor to identify an equalization response for equalizing an output signal of a modulator of a satellite gateway, generate a compensation response based on the equalization response and a sample rate of a pre-distorter of the modulator, and send the equalization response to the pre-distorter.

Abstract: A signal analysis method for analyzing a pulse modulated input signal is described. The signal analysis method includes: receiving the pulse modulated input signal, the input signal including a symbol sequence; recovering a clock signal from the input signal, the clock signal being associated with the input signal; sampling the input signal based on the clock signal, thereby obtaining a set of input signal samples, each of the input signal samples having a certain level being constant over time; determining at least two different levels of input signal samples being associated with different symbols of the symbol sequence; and determining at least one decision threshold based on the at least two different levels determined previously, the decision threshold being associated with a symbol transition of the symbol sequence. Further, a signal analysis apparatus is described.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for compensating for frequency-dependent I-Q imbalance. In some implementations, a radio receiver includes an in-phase mixer configured to generate an in-phase (I) signal and a quadrature mixer configured to generate a quadrature (Q) signal. A first analog-to-digital (A/D) converter is configured to generate first digital samples from one of the I signal and the Q signal. A second analog-to-digital (A/D) converter is configured to generate second digital samples from the other of the I signal and the Q signal. A compensation system includes a feedback loop configured to compensate for frequency-dependent I-Q imbalance based on results, for each of multiple of the first digital samples, of cross-correlation of the first digital sample with each of multiple of the second digital samples.

Abstract: A system and method are described which enable planned evolution and obsolescence of multiuser wireless spectrum. One embodiment of such a system includes one or multiple centralized processors and one or multiple distributed nodes that communicate via wireline or wireless connections. The distributed nodes may share their identification number and other reconfigurable system parameters with the centralized processor. The information about all distributed nodes may be stored in a database that is shared by all centralized processors. The reconfigurable system parameters may comprise power emission, frequency band, modulation/coding scheme. The distributed nodes may be software defined radios such as FPGA, DSP, GPU and/or GPCPU that run algorithms for baseband signal processing and may be reconfigured remotely by the centralized processor. A cloud wireless system may be used wherein the distributed nodes are reconfigured periodically or instantly to adjust to the evolving wireless architecture.

Abstract: The present invention relates to a method and apparatus for transceiving data. A method in which a transmitting terminal transmits data to a receiving terminal in a MIMO system according to one embodiment of the present invention comprises the following steps: generating a data field containing the data; generating a signal field containing information on the data field; generating a data frame containing the data field and the signal field; and transmitting the data frame to the receiving terminal. According to the present invention, an end of the frame being transmitted is accurately notified to the receiving terminal in a communication system in which the frame is transmitted using MIMO, thereby decoding the frame in a more efficient manner at the receiving terminal.

Abstract: Embodiments of the present disclosure provide a signal processing apparatus and method, a network device and a computer readable storage medium. The apparatus comprises: a receiving unit configured to receive a signal from a remote radio frequency unit (RRH), the RRH being independent from the signal processing apparatus; a processing unit configured to perform signal enhancement on the signal; and a transmitting unit configured to transmit the enhanced signal to a baseband unit (BBU). According to the present disclosure, it is possible to implement a fronthaul or anyhaul solution with a high reliability, and meanwhile save the RF transmission power of the terminal device and reduce the operation costs of the operators.

Abstract: A clock device includes a first phase interpolator circuit, a detector circuit, and a digital controller circuitry. The first phase interpolator circuit generates a second reference clock signal according to a first control signal and at least one first reference clock signal. The detector circuit generates an error signal according to a difference between a receiver signal and the second reference clock signal, in which the receiver signal is a receiver clock signal from a receiver circuit or an input signal that has been equalized by the receiver circuit. The digital controller circuitry generates the first control signal and a second control signal according to the error signal, and updates the second control signal according to a change of the first control signal, in which the second control signal is for generating a transmitter clock signal of a transmitter circuit.

Abstract: A high-speed serial interface (HSIF) for communicating between an analog front end (AFE) and a System on a Chip (SoC) digital radio via a bi-directional serial bit connection for an OFDM cable modem includes generating Status Frames and Data Frames to be communicated between the tuner and AFE and sending the generated Status Frames and Data Frames on a continual basis. Each Frame is a 10-bit K.28 Comma Sync word followed by a payload and when no data is queued to be communicated, Status Frames are sent asynchronously as filler frames.

Abstract: A receiver (100) with an antenna array (150) provides interference reduction for blocking signals received by the receiver (100) by controlling different receiver blocks (110) associated with different antenna elements (112) of the array (150) differently, particularly for those antenna elements (112) in the corner or proximate a corner or edge of the array (150), responsive to a power level of a combined signal resulting from all antenna elements (112). As a result, the solution presented herein enables a receiver (100) to more accurately target the gain control such that the antenna elements (112) and associated receiver circuitry (110) most likely to be impacted by unwanted signals have a reduced gain, while the antenna elements (112) and associated receiver circuitry (110) less likely to be impacted by unwanted signals can operate with a higher gain.

Abstract: A method of controlling a multi-antenna communication system includes: obtaining a first baseband signal through a first antenna; performing a cross-correlation calculation on the first baseband signal and default information during a period of time, thereby to obtain a plurality of cross-correlation calculation results; calculating energy of the first baseband signal to obtain a first energy value; determining connectivity state of the first antenna according to the first energy value and the cross-correlation calculation results; and controlling a signal processing circuit of the multi-antenna communication system according to the connectivity state of the first antenna.

Abstract: A plurality of driver slice circuits arranged in parallel having a plurality of driver slice outputs, each driver slice circuit having a digital driver input and a driver slice output, each driver slice circuit configured to generate a signal level determined by the digital driver input, and a common output node connected to the plurality of driver slice outputs and a wire of a multi-wire bus, the multi-wire bus having a characteristic transmission impedance matched to an output impedance of the plurality of driver slice circuits arranged in parallel, each driver slice circuit of the plurality of driver slice circuits having an individual output impedance that is greater than the characteristic transmission impedance of the wire of the multi-wire bus.

Abstract: Provided is a transmitter performing at least feed-forward equalizing and crosstalk cancellation, the transmitter including: a main driver (20) generating waveform including data to be transmitted; and an FFE driver block (40) connected to the main driver in parallel, and generating waveform that is acquired by applying a sum of amplitude for feed-forward equalizing and amplitude for crosstalk cancellation, so as to adjust the waveform generated by the main driver.

Abstract: A receiver for cancelling strong signals from combined weak and strong signals includes: a first circuitry for inputting a weak and strong signal as an input; a parametric cancellation circuit for inputting a representation of the strong signal and an output of the first circuitry to produce a cancellation signal; a second circuitry electrically coupled to the parametric cancellation circuit for inputting the cancellation signal to produce a modulated output; a demodulator electronically coupled to the second circuitry for demodulating the modulated output to produce a demodulated output and an error signal, where the demodulated output is the data contained in the weak signal; and an adaptation logic circuit for inputting the representation of the strong signal, the demodulated output and the error signal to adaptively produce parameters for the parametric cancellation circuit. The parametric cancellation circuit further inputs the error signal and the parameters to produce the cancellation signal.

Abstract: Apparatuses of wireless communication devices are disclosed. An apparatus of a user equipment includes one or more processors configured to start a first timer responsive to detection of a Radio Link (RL) failure, start a second timer and trigger a beam recovery procedure one or more times responsive to expiry of the first timer if RL recovery is not detected, and start a third timer and attempt to find a suitable cell for Radio Resource Control (RRC) connection reestablishment responsive to one or more expiries of the second timer if RL recovery fails. The one or more processors are also configured to go to an RRC idle or inactive state responsive to expiry of the third timer if a suitable cell for RRC connection reestablishment is not found.

Abstract: Example operations may include obtaining a first received signal of a first wireless transmission by a transmitting device of a wireless signal received at a receiving device. The operations may also include obtaining a second received signal of a second wireless transmission by the transmitting device that is a retransmission of the wireless signal also received at the receiving device. The operations may further include determining, based on the first received signal and the second received signal, an equalization of distortion of propagation of the wireless signal between the transmitting device and the receiving device. In addition, the operations may include generating an equalized signal based on the determined signal equalization, wherein the equalized signal is an estimate of the wireless signal as transmitted by the transmitting device.

Abstract: A system for radar object simulation is provided. The system comprises a filter unit with a plurality of filter paths, a processing unit and a communication interface. In this context, each of the plurality of filter paths comprises a number of coefficients corresponding to the distance of a simulated object. In addition, the processing unit is configured to select a filter path of the plurality of filter paths based on the number of coefficients.

Abstract: An object to be achieved by an embodiment of the present invention is to provide a radar apparatus, a signal processing apparatus, and a method that reduce interference caused to a reception signal by a transmission signal during transmission of a signal. To achieve the above object, a radar apparatus of an embodiment includes: a transmitter configured to transmit a pulse signal; a receiver configured to receive a reception signal including a first signal as the pulse signal reflected by an observation target and an interference signal provided in accordance with the pulse signal; and a processor configured to generate a separated signal in which the reception signal is, on a time axis, separated into a first component corresponding to the first signal and an interference component corresponding to the interference signal by using a first reference signal generated based on the pulse signal and reduce the interference component.

Abstract: Methods and systems are described for receiving N phases of a local clock signal and M phases of a reference signal, wherein M is an integer greater than or equal to 1 and N is an integer greater than or equal to 2, generating a plurality of partial phase error signals, each partial phase error signal formed at least in part by comparing (i) a respective phase of the M phases of the reference signal to (ii) a respective phase of the N phases of the local clock signal, and generating a composite phase error signal by summing the plurality of partial phase error signals, and responsively adjusting a fixed phase of a local oscillator using the composite phase error signal.