Abstract: A clock and data recovery circuit includes a sampling circuit, a phase detector, a first processing circuit, a second processing circuit and an oscillator circuit. The sampling circuit is configured to sample input data according to an output clock, and generate a sampling result. The phase detector is configured to generate a detection result according to the sampling result. The first processing circuit is configured to process the sampling result to generate a first digital code. The second processing circuit is configured to accumulate a portion of the first digital code to generate a second digital code. A rate of change of a code value of the second digital code is slower than a rate of change of a code value of the first digital code. The oscillator circuit is configured to generate the output clock according to the detection result, the first digital code and the second digital code.

Abstract: A method, wireless device and network node for determining an indication of a precoder are provided. According to one aspect, a method in a wireless device includes determining and the indication of the precoder from a codebook, the indication comprising a first beam phase parameter and a second beam phase parameter corresponding to a first beam and a second beam respectively. The first beam phase parameter takes on one of a first integer number of phase values and the second beam phase parameter takes on one of a second integer number of phase values. At least one of the following conditions apply: the second integer number of phase values is less than the first number of phase values, and the second frequency-granularity is greater than the first frequency-granularity. The method includes transmitting the determined indication of a precoder to the network node.

Abstract: A receiver includes an interface configured to receive a data signal based on an n-level pulse amplitude modulation (PAM-n) in which n is an integer equal to or greater than 4. The interface may include an analog-digital converting circuit configured to adjust a reference voltage, for distinguishing second bit data from the data signal in a second section, based on first bit data converted from the data signal in a first section and the first bit data converted from the data signal in the second section, the second section being after the first section.

Abstract: This document discloses a solution for detecting interference in a radio access network. According to an aspect, a method includes as performed by a network node of the radio access network: acquiring a first equalized signal representing a signal received by a first radio head serving a terminal device, the first equalized signal including a signal received by the first radio head from the terminal device; acquiring a second equalized signal representing a signal received by a second radio head not serving the terminal device, wherein the second radio head is spatially distant from the first radio head; cross-correlating the first equalized signal with the second equalized signal and determining, on the basis of said cross-correlating, whether or not the second equalized signal also includes a signal received from the terminal device; and as a result of the second equalized signal being determined to include the signal received from the terminal device, causing execution of an interference management action.

Abstract: An RF frontend integrated circuit (IC) device comprises one or more RF transceivers to transmit and receive RF signals within a first frequency band and a second frequency band that is higher than the first frequency band. The RF frontend IC device further comprises a bidirectional LO signal generation circuit coupled to the one or more transceivers to generate a bidirectional LO signal. The bidirectional LO signal is injected between the first frequency band and the second frequency band. The bidirectional LO signal generation circuit is to perform a high-side LO injection for the RF signals within the first frequency band by injecting the bidirectional LO signal having an LO frequency higher than the first frequency band and to perform a low-side LO injection for the RF signals within the second frequency band by injecting the bidirectional LO signal having the LO frequency lower than the second frequency band.

Abstract: Systems and methods for extracting polarized sub-signals from a dual-polarized signal includes isolating the polarized sub-signals using one or more filters. When a single filter is used to derive a first sub-signal, analog interference cancellation may be used to derive the second sub-signal. When two filters are used, the first and second sub-signals may each be derived using a corresponding filter.

Abstract: Apparatus for receiving radio frequency, RF, signals, comprising at least two antenna panels, wherein each of the at least two antenna panels is configured to provide a respective received signal with an associated frequency spectrum, wherein the apparatus is configured to apply a frequency shift to at least one of the received signals such that center frequencies of at least two adjacent frequency spectra comprise a predetermined frequency distance from each other.

Abstract: A method and transmitter for transmitting an On-Off Keying, OOK, signal which comprises an ON waveform and an OFF waveform forming a pattern representing transmitted binary information as a Manchester code. For one binary value of information to be transmitted, a first set of complex-valued frequency domain symbols is provided to an inverse fast Fourier transformer, or for the other binary value of information to be transmitted, a second set of complex-valued frequency domain symbols is provided to the inverse fast Fourier transformer. The inverse fast Fourier transform is performed to form an orthogonal frequency division multiplex, OFDM representation, including a cyclic prefix, of the OOK signal of information to be transmitted. The OFDM representation is then transmitted.

Abstract: Exemplary embodiments are disclosed of signal level indicators and antenna assemblies including the same. In an exemplary embodiment, an antenna assembly includes an antenna configured to be operable for receiving signals, a signal level indicator for indicating a strength of signals received by the antenna, and an amplifier coupled for communication with the antenna, the signal level indicator, and a signal output. The amplifier is configured to be operable for amplifying signals received by the antenna.

Abstract: Techniques of defining a transmission scheme for NB-IoT data include determining the TBS based on 16-quadrature amplitude modulation (QAM) analysis but use quadrature phase-shift keying (QPSK) for modulation. For example, a base station (eNB) may determine that a UE is configured to receive or transmit data with 16-QAM modulation via capability signalling from the UE. Upon performing this determination, the eNB transmits configuration data to the UE, e.g., via DCI, configuring the UE to receive data over a narrowband physical downlink shared channel (NPDSCH) using 16-QAM modulation. Part of the configuration data indicates whether the UE is to support 16-QAM modulation with or without repetition via radio resource control (RRC) parameter modulation-restriction-Repetitions. Depending upon this indication, the UE may use quadrature phase-shift keying (QPSK) rather than 16-QAM despite selecting or being assigned a TBS based on 16-QAM modulation.

Abstract: A mixer in a receiver converts a sounding sequence of alternating ones and zeros to an intermediate frequency signal. A digital mixer converts the intermediate frequency signal to a baseband signal that contains a positive tone and a negative tone. A frequency offset correction circuit generates frequency offset corrections based on frequency offset estimates of the frequency offset between a transmitter of the sounding sequence and the receiver. A frequency adjustment circuit adjusts a frequency of the mixer or the digital mixer to thereby center the positive tone and the negative tone around DC. DFT circuits perform single bin DFTs respectively centered on the positive and negative tones. Phases of the positive and negative tones are calculated based on outputs of the DFT circuits and the phases are used to determine fractional time value associated with a distance measurement between the transmitter and receiver.

Abstract: A beamformer for providing signals from a device under test (DUT) and an emulator is disclosed. The beamformer includes: a radio frequency (RF) interface configured to receive a plurality of radio beams and convert a data stream comprising a plurality of radio beams from analog signals to digital signals; a radio samples processor configured to receive the digital signals, decouple data samples from the plurality of radio beams, and recombine the data samples to provide a single data stream to a corresponding single device used by an end-user; and a local processor adapted to dynamically adjust operational parameters in the radio samples processor of the single data stream.

Abstract: A wireless communication method and device are provided. The method comprises: a terminal device determining a first feedback mode for feeding back the signal quality of multiple transmitting beams of a network device, wherein the first feedback mode differs from the other feedback modes supported by the terminal device in at least one of the following aspects: receiving the capability of receiving beams or receiving beam groups for signal quality feedback, and the number of receiving beams or receiving beam groups for signal quality feedback; and the terminal device feeding back the signal quality to the network device according to the first feedback mode.

Abstract: A communication device is provided that includes an obtaining unit that performs signaling to obtain information indicating which beam from among a plurality of reception beams of the communication device is to be used for awaiting arrival of control information, which is included in a control region transmitted in a beam from a base station; and a communication control unit that performs control to await the arrival of beams from the base station in the beam indicated in the information.

Abstract: A semiconductor apparatus receives a first clock signal and a second clock signal. The semiconductor apparatus configured to perform a training operation internally, the training operation being an operation of internally correcting a phase difference between the first clock signal and the second clock signal by dividing the first clock signal to generate multi-phase signals, detecting phase difference between the second clock signal and the multi-phase signals, and adjusting phases of the multi-phase signals according to a result of the detecting of the phase difference.

Abstract: A receiver circuit comprising an equalizer and a method of correcting offset in the equalizer. In an example, the equalizer includes a plurality of delay stages for sampling and storing a sequence input samples, and a plurality of coefficient gain stages, each coupled to a corresponding delay stage to apply a gain corresponding to a coefficient value. The outputs of the coefficient gain stages are summed to produce a weighted sum for quantization by a slicer. Offset correction circuitry is provided, including memory storing a look-up table (LUT) for each coefficient gain stage, each storing offset correction values corresponding to the available coefficient values for the coefficient gain stage. Addressing circuitry retrieves the offset correction values for the coefficient values currently selected for each gain stage, and applies an offset correction corresponding to the sum of the retrieved offset correction values.

Abstract: One example includes a receiver system. The receiver system includes an analog-to-digital converter (ADC) configured to convert an analog input signal into a digital output signal at a sampling frequency. The receiver system also includes a spur correction system configured to receive the digital output signal and to estimate spurs associated with the digital output signal and to selectively correct a subset of the spurs associated with a set of frequencies that are based on the sampling frequency.

Abstract: Wi-Fi communication is further secured by perturbation of a spatial mapping matrix. In an embodiment channel state information is obtained from a receiving device in a wireless network through the wireless network. A first set of beam steering vectors is derived based on the channel state information to direct a radio signal to the receiving device. A second set of beam steering vectors is derived based on the channel state information to direct a radio signal other than to the receiving device. A perturbation matrix is generated. A spatial mapping matrix is formed by combining the first and the second set of beam steering vectors with a perturbation matrix. Data symbols to be transmitted are pre-coded to the receiving device using the spatial mapping matrix and transmitted through the wireless network to the receiving device.

Abstract: The present application relates to methods for operating a wireless communication device (20). According to an embodiment, the method comprises transmitting, on a wireless link between the wireless communication device (20) and a further wireless communication device (30, 40, 50), at least one first signal (301) using a first polarization (501), transmitting, on the wireless link, at least one second signal (302) using a second polarization (502), and transmitting, on the wireless link, at least one third signal (303) using a third polarization (503). The first polarization (501), the second polarization (502), and the third polarization (503) are different from each other. Based on the at least one first signal (301), the at least one second signal (302), and the at least one third signal (303), channels of the wireless link associated with the at least one first signal (301), the at least one second signal (302), and the at least one third signal (303) are sounded.

Abstract: Provided are a data receiving device and a corresponding method for receiving the data. The data receiving device comprises a path control logic configured to store L symbol paths, where L is a natural number equal to or greater than 2, L feedback filters configured to calculate L inter-symbol interferences (ISI) for the L symbol paths, respectively, L operators configured to remove the L inter-symbol interferences from an output of a feed-forward equalizer, and a path metric calculator configured to receive outputs of the L operators and calculate a path metric for each of the L symbol paths, wherein the path control logic is configured to select L values among the calculated path metrics for the L symbol paths to update the L symbol paths.