Abstract: A channel estimation method in which a reception device performs channel estimation on the basis of a known signal transmitted by a transmission device divides and arranges a known signal having a predetermined length in frames, transmits the known signal divided and arranged in the frames together with a data signal as a radio frame, receives the transmitted radio frame, calculates a data signal component including a delay wave component from the received radio frame, extracts a plurality of known signal components each including a delay wave component of the divided and arranged known signal by subtracting the data signal component from the received radio frame, concatenates the plurality of extracted known signal components to restore a known signal having a predetermined length, and performs channel estimation on the basis of the restored known signal having a predetermined length.

Abstract: In one embodiment, a resonator device includes a substrate comprising a piezoelectric material and a set of electrodes on the substrate. The electrodes are in parallel and a width of the electrodes is equal to a distance between the electrodes. The RF resonator device further includes a set of switches, with each switch coupled to a respective electrode. The switches are to connect to opposite terminals of an alternating current (AC) signal source and select between the terminals of the AC signal source based on an input signal.

Abstract: Aspects of the present application provide methods and devices for a phase tracking reference (PT-RS) scheme for use by a single carrier Offset QAM (SC-OQAM) transmitter and receiver to estimate, and correct, phase errors that occur over the communication link between the SC-OQAM transmitter and receiver. Phase errors can occur due to, for example, phase noise or carrier frequency offset (CFO). A PT-RS that includes PT-RS symbols can be used to track phase error. As a result of SC-OQAM waveform generation, real-valued PT-RS symbols may incur imaginary valued interference and imaginary-valued PT-RS symbols may incur real-valued interference. In order to effectively use the PT-RS to estimate and compensate for the phase noise, the interference must be appropriately considered.

Abstract: Devices, systems and methods that arrange a plurality of cable modems into one or more clusters so that a plurality of bitloading profiles may be determined, by which data may be communicated to and from the cable modems, after allocating the plurality of the bitloading profiles among the cable modems.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be configured with a bundling factor, may first generate a codebook, and may then bundle a quantity of bits into a single bit according to the bundling factor (e.g., may compress the sequence of bits into a smaller, second set of bits, where each bit of the second set of bits represents a quantity of the sequence of bits equal to the bundling factor). The UE may support cross downlink control information (DCI) bundling, in which case each bundle of the sequence of bits may be based on the bundling factor, instead of being based on the DCI (e.g., a given bundle may include feedback bits corresponding to occasions of multiple grants).

Abstract: In an example, a circuit includes a differential input circuit having a first input at a first capacitor terminal and a second input at a second capacitor terminal. The differential input circuit includes a first transistor having a first transistor control terminal and first and second terminals. The differential input circuit includes a second transistor having a second transistor control terminal and first and second terminals, the first terminals of the first and second transistors coupled together. The circuit includes a first capacitor having the first capacitor terminal and having another terminal coupled to the first transistor control terminal. The circuit also includes a second capacitor having the second capacitor terminal and having another terminal coupled to the second transistor control terminal. The circuit includes a first offset correction input coupled to the first transistor control terminal and a second offset correction input coupled to the second transistor control terminal.

Abstract: An apparatus, including: a switched capacitor configured to generate a switched capacitor voltage based on an input clock signal and a current; a current digital-to-analog converter (DAC) configured to generate the current based on a first digital signal; a first reference voltage generator configured to generate a first reference voltage; and a first voltage comparing device configured to generate a first frequency deviation detection signal based on a comparison of the switched capacitor voltage to the first reference voltage.

Abstract: A method of estimating beamforming weights, the method including receiving a Sounding Reference Signal (SRS) at an Open Radio Access Network (O-RAN) Distributed Unit (O-DU); performing channel estimation of the SRS received; computing a time domain response on the SRS channel estimation at a level of granularity as defined by a bandwidth of the SRS; determining a timing offset at the defined level of granularity; compensating for the timing offset at the defined level of granularity; estimating the beamforming weights according to the compensated timing offset; and transmitting the estimated beamforming weights to an O-RAN Radio Unit (O-RU) over a fronthaul interface between the O-DU and the O-RU.

Abstract: A multi-channel digital isolator includes a digital isolator and an interlock circuit. The isolator includes a transmitter having a transmitter output, a receiver having a receiver input and a receiver output, an isolation barrier coupled between the transmitter output and the receiver input, and an output buffer having a buffer input and configured to output an isolated signal. The transmitter is configured to transmit an input signal across the isolation barrier. The interlock circuit has an interlock input coupled to the receiver output and an interlock output coupled to the buffer input. The interlock module is configured to prevent overlapping active states between the first isolated signal and a complementary isolated signal. In some implementations, the digital isolator also includes a dead-time insertion circuit.

Abstract: A multi-tap Differential Feedforward Equalizer (DFFE) configuration with both precursor and postcursor taps is provided. The DFFE has reduced noise and/or crosstalk characteristics when compared to a Feedforward Equalizer (FFE) since DFFE uses decision outputs of slicers as inputs to a finite impulse response (FIR) unlike FFE which uses actual analog signal inputs. The digital outputs of the tentative decision slicers are multiplied with tap coefficients to reduce noise. Further, since digital outputs are used as the multiplier inputs, the multipliers effectively work as adders which are less complex to implement. The decisions at the outputs of the tentative decision slicers are tentative and are used in a FIR filter to equalize the signal; the equalized signal may be provided as input to the next stage slicers. The bit-error-rate (BER) of the final stage decisions are lower or better than the BER of the previous stage tentative decisions.

Abstract: Various aspects of the present disclosure relate to artificial intelligence (AI) enabled beam management. A base station may notify a user equipment (UE) of an availability of AI-enabled beam management and provide configuration parameters for an AI algorithm. The UE may utilize the configuration parameters to configure an AI algorithm. The UE may process a first set of beams utilizing the configured AI algorithm to identify a second set of beams. The UE may notify the base station (and/or other network entity) of the second set of beams, and one or more beams of the second set of beams can be utilized for wireless communication between the UE and the base station and/or other network entity or UE.

Abstract: The present disclosure relates to a pre-5th generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th generation (4G) communication system such as long term evolution (LTE). Disclosed is a method of identifying non-Line of Sight, NLOS, links between entities in a telecommunication network, comprising the steps of: determining if the link is NLOS and signalling from a first entity to a second entity a result of the determination by means of a parameter indicative of NLOS.

Abstract: A method includes obtaining complex pilot data in a frame from a sequence signal, determining an estimate of a Doppler shift from a cyclic prefix and a cyclic postfix of the frame, performing time-domain processing of an amplitude and phase of the complex pilot data separately for each subcarrier, determining a time average of the amplitude of the complex pilot data, correcting the phase of the complex pilot data by the estimate of the Doppler shift thereby generating the corrected phase, and filtering the corrected phase by a first filter. The method further includes calculating a metric for selecting a modulation type in subcarriers at a receiver with pre-selected or dynamically adjusted boundaries.

Abstract: This disclosure discloses a communication method and apparatus. In the method, a reflector is used to assist in communication between a terminal and an access network device, and in a reflector-assisted communication process, the reflector is indicated to be in a working mode when being required by the terminal or the access network device, to assist in communication, and the reflector is indicated to be in a sleep mode when being required by the terminal or the access network device, to reduce power consumption.

Abstract: The present disclosure may provide a device and method for independent phase adjustment of a PAM receiver. The device includes: a plurality of samplers configured to perform sampling for signal level decision of multi-level input data; a global clock source configured to provide a common sampling clock to the samplers; and a plurality of phase adjusters configured to respectively adjust a phase of the common sampling clock to provide a sampling phase applied to a corresponding sampler. According to the present disclosure, it is possible to achieve reliable BER performance by independently adjusting a sampling phase of a sampler corresponding to each eye opening even in the presence of unsymmetric eye openings.

Abstract: Circuit for wake-up receivers are provide. In some embodiments, the wake-up receivers include self-mixers that receive a gate bias voltage. Some of the self-mixers are single ended and some are differential. In some embodiments, the wake-up receivers include a matching network that is connected to the input of the self-mixer. In some embodiments, the wake-up receivers include a low frequency path connected to the output of the self-mixer. In some embodiments, the wake-up receivers include a high frequency path connected to the output of the self-mixer. In some embodiments, the wake-up receivers are configured to receive an encoded bit stream. In some embodiments, the wake-up receivers are configured to wake-up another receiver.

Abstract: A controller includes a memory that stores instructions; and a processer that executes the instructions. When executed by the processor, the instructions cause the controller to provide a waveform based on an IQ baseband waveform data array; initialize a signal analysis device to acquire a modulated radio frequency signal which is based on the IQ baseband waveform data array; and control the signal analysis device to measure the modulated radio frequency signal which is based on the IQ baseband waveform data array.

Abstract: In an industrial wireless communication system. a base wireless device has a synchronous connection transmission unit for broadcasting a synchronous connection signal to achieve synchronous connection to a remote wireless device in only a single synchronous connection period which is an integral multiple of a hopping period. The synchronous connection transmission unit sequentially switches communication frequencies for synchronization so as to transmit the synchronous connection signal with a plurality of communication frequencies for synchronization within one hopping period. A synchronous connection reception unit sequentially switches communication frequencies for synchronization with a switching period which is longer than the hopping period and shorter than twice the hopping period, so as to perform a reception wait process for the synchronous connection signal with a plurality of communication frequencies for synchronization.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive downlink control information that identifies multiple precoder indicators and at least one co-phasing factor indicator for generating a co-phased joint transmission using multiple antenna panels. The UE may determine precoders for the multiple antenna panels based at least in part on the multiple precoder indicators and the at least one co-phasing factor indicator. The UE may communicate by joint transmission using the multiple antenna panels according to the determined precoders. Numerous other aspects are provided.

Abstract: A subscriber module of a fixed wireless access communication system comprises an offset Gregorian antenna arrangement, an array of antenna elements arranged as a feed, a beamforming network and a processor. The processor is configured to provide, to the beamformer, a pre-determined plurality of antenna weight vectors configured to form a plurality of beams, the orientations of the plurality of beams being arranged in a grid comprising a plurality of rows, each of the pre-determined plurality of antenna weight vectors being configured to form a respective beam from the primary reflector dish of the Gregorian antenna arrangement by forming a respective feed beam from the array of antenna elements. The relationship between the azimuth and elevation direction of each feed beam and the azimuth and elevation direction of the respective beam from the primary reflector dish is a non-linear function of azimuth and elevation.