Abstract: A beam formation matching for communications between a receiver (201) and transmitter (101) in a multiple beam Multiple Input Multiple Output (MIMO) system (100) is disclosed.

Abstract: Certain aspects of the present disclosure provide techniques for coordinated transmissions in certain systems, such as millimeter wave (mmW) systems. A method of wireless communication by a user equipment (UE) generally includes providing an indication to a plurality of base stations (BSs) of one or more selected beams for transmission by each of the plurality of BSs. The method includes determining one or more co-phase factors. The method includes receiving a coordinated transmission from the plurality of BSs based on the one or more selected beams and the one or more co-phase factors. A method by a BS generally includes receiving the indication from the UE of the one or more selected beam, determining one or more co-phase correction factors, and sending a coordinated transmission to the UE based, at least in part, on the one or more selected beam and the one or more co-phase correction factors.

Abstract: A method for transmitting data in a multiple-input-multiple-output space-time coded communication using a mapping table mapping a plurality of symbols defining the communication to respective antennae from amongst a plurality of transmission antennae and to at least one other transmission resource. The mapping table may comprise Alamouti-coded primary segments and may also comprise secondary segments, comprising primary segments. The primary segments in the secondary segments may be defined in accordance to an Alamouti based code pattern applied at the segment level to define a segment-level Alamouti based code.

Abstract: A WTRU may include a memory and a processor. The processor may be configured to receive beam grouping information from a gNB or transmission and reception point (TRP). The beam grouping information may indicate a group of beams that the WTRU may report using group-based reporting. The group-based reporting may be a reduced level of reporting compared to a beam-based reporting. The group-based report may include measurement information for a representative beam. The representative beam may be one of the beams in the group or represents an average of the beams in the group. Alternatively, the representative beam may be a beam that has a maximum measurement value compared to other beams in the group. The group-based report may include a reference signal received power (RSRP) for the representative beam and a differential RSRP for each additional beam in the beam group.

Abstract: A sensor device capable of adjusting at least one clock signal of the sensor device according to a communication between a host and an auxiliary device through a specific bus includes a first oscillator circuit and a processing circuit. The first oscillator circuit is configured for generating a first clock signal. The processing circuit is configured for calibrating a clock frequency of the first clock signal according to the communication between the host and the auxiliary device.

Abstract: A method, system, or transmitting device including at least two antennas (e.g., orthogonally polarized antennas) that derives the precoding for each of the at least two antennas. The transmission signal provided to each antenna is based on an individual precoder for each antenna that is based on the signals received by the particular antenna.

Abstract: A 1st frequency reduction circuit of a filter of the invention downsamples the sampling rate of a signal source to a predetermined value to obtain a 1st PCM stream, a 1st frequency raising circuit raises the sampling rate of the 1st PCM stream to be the same as that of the signal source, a 1st delay circuit delays a stream of the signal source, such that its phase is the same as that of the 1st PCM stream, a 1st adder subtracts the frequency raised 1st PCM steam from the delayed stream of the signal source to obtain a passband 1, a j-th frequency reduction circuit downsamples the sampling rate of a (j?1)-th PCM stream to a predetermined value to obtain a j-th PCM stream, wherein 2?j?n, a j-th frequency raising circuit raises the sampling rate of the j-th PCM stream to be the same as that of the (j?1)-th PCM stream, a j-th delay circuit delays the (j?1)-th PCM stream, such that its phase is the same as that of the j-th PCM stream, a j-th adder subtracts the frequency raised j-th PCM stream from the delayed (j?

Abstract: Apparatus and associated methods relating to reducing lock time include pre-calibrating and storing phase-locked loop (PLL) and/or injection-locked oscillator (ILO) adaptation values during startup and loading the pre-calibrated values during rate change. In an illustrative example, an integrated circuit may include a controllable frequency circuit operable at frequencies within each of a plurality of frequency bands. A data store may store operational settings associated with each frequency of the plurality of frequency bands. A state machine may be coupled to the controllable frequency circuit and the data store configured to select a predetermined frequency band in response to a command signal, retrieve, from the data store, operational settings associated with the predetermined frequency band, and, apply the retrieved operational settings to the controllable frequency circuit.

Abstract: A method for channel estimation, performed by a wireless transmit/receive unit (WTRU), includes: receiving a plurality of input signals, generating a plurality of sensing matrices for the input signals, generating an augmented sensing matrix and an augmented observation vector according to the sensing matrices and the input signals, estimating a plurality of channel delay parameters according to the augmented sensing matrix and the augmented observation vector, and estimating channel information according to the channel delay parameters.

Abstract: Methods and systems are described for generating two comparator outputs by comparing a received signal to a first threshold and a second threshold according to a sampling clock, the first and second thresholds determined by an estimated amount of inter-symbol interference on a multi-wire bus, selecting one of the two comparator outputs as a data decision, the selection based on at least one prior data decision, and selecting one of the two comparator outputs as a phase-error decision, the phase error decision selected in response to identification of a predetermined data decision pattern.

Abstract: The present disclosure includes a time-to-digital converter (TDC) based RF-to-digital (RDC) data converter for time domain signal processing polar receivers. Polar data conversion achieves better SNR tolerance owing to its phase convergence near the origin in a polar coordinate. The proposed RDC consists of a TDC for phase detection and an analog-to-digital converter (ADC) for amplitude conversion. Unlike the conversional data converter, the proposed ADC's sampling position is guided by the detected phase result from the TDC's output. This TDC assisted data-converter architecture reduces the number of bits required for the ADC. In addition, oversampling is no longer needed. With precisely controlled tunable delay cells and gain compensator, this hybrid data convertor is capable to directly convert Quadrature Amplitude Modulation (QAM) waveforms and Amplitude Phase Shift Keying (APSK) waveforms directly from the RF signal without down-conversion.

Abstract: Methods, systems, and devices for wireless communication are described that support a low peak-to-average power ratio (PAPR) precoded reference signal design for multiple-input, multiple-output (MIMO) transmissions. A user equipment (UE) may identify multiple sets of symbols associated with different reference signal waveforms, where each reference signal waveform may be associated with a low PAPR. In some cases, different single-carrier reference signal waveforms may be mapped to subsets of frequency resources through frequency division multiplexing (FDM) for a transmission on a single antenna. However, the addition of single-carrier waveforms through FDM for a transmission via an antenna may result in an uplink transmission having a high PAPR (e.g., as compared to single-carrier waveforms). The UE may reduce the PAPR of the uplink transmission by multiplexing the reference signal waveforms in the time domain (e.g., using time division multiplexing (TDM)).

Abstract: A wireless communication apparatus includes components below. An equalization unit performs equalization processing on a part of a received signal corresponding to a first range and a part of the received signal corresponding to a second range. The first range includes detection target data. The second range is outside the first range. A replica generation unit decomposes the second range, on which equalization processing has been performed, into a plurality of signal components, and reproduces the part of the received signal corresponding to the second range for each of the signal components to generate a replica of an interference component. An interference cancellation unit cancels the interference component from the part of the received signal corresponding to the first range by using the replica. A data extraction unit extracts the detection target data from the received signal.

Abstract: A device includes a signal input to receive a data input as part of a bit stream. The device also includes a reference input to receive a reference signal. The device further includes push circuitry to receive a first weight value, receive a first correction value, and generate a push signal based on the first weight value and the first correction value to selectively modify the data input as well as pull circuitry to receive a second weight value, receive a second correction value, and generate a pull signal based on the second weight value and the second correction value to selectively modify the data input.

Abstract: There is provided mechanisms for polarization handling of received beam-formed signals. A method is performed by a receiving radio transceiver device. The method comprises collecting statistics of received power of a beam-formed signal transmitted in two orthogonal polarizations from a transmitting radio transceiver device. The method comprises determining a similarity measure value of the beam-formed signal between the two orthogonal polarizations using the collected statistics. The method comprises signalling to the transmitting radio transceiver device, when the similarity measure value is equal to, or larger than, a similarity threshold value, to use rank one for subsequent transmission of the beam-formed signal to the receiving radio transceiver device.

Abstract: A method for radio communication between a transmitting node and receiving nodes comprises obtaining (S1) of directions from the transmitting node to the receiving nodes and antenna gains needed for each direction. A beam forming solution having a high gain in the directions of a set of receiving nodes and with antenna gains adapted to the need of the link is obtained (S2). User data to be transmitted to the receiving nodes is obtained (S3). The user data is overlay-coded (S4) by a code-domain overlaid code and/or a frequency-domain overlaid code, separately for each respective receiving node. The overlaid-coded user data is combined (S5) into at least one combined signal stream. Analogue beamforming, hybrid beamforming or constrained beamforming is performed (S6) on the combined signal stream(s) according to the beam forming solution. The beamformed data is transmitted (S7) from the transmitting node to the receiving nodes.

Abstract: A signaling system is disclosed. The signaling system includes a first integrated circuit (IC) chip to receive a data signal and a strobe signal. The first IC includes circuitry to sample the data signal at times indicated by the strobe signal to generate phase error information and circuitry to output the phase error information from the first IC device. The system further includes a signaling link and a second IC chip coupled to the first IC chip via the signaling link to output the data signal and the strobe signal to the first IC chip. The second IC chip includes delay circuitry to generate the strobe signal by delaying an aperiodic timing signal for a first time interval and timing control circuitry to receive the phase error information from the first IC chip and adjust the first time interval in accordance with the phase error information.

Abstract: A digital PLL, which can be a virtual PLL, can condition digital phase information, comprising phase modification requests, for transfer, jitter, and phase-noise filtering of clock information between a clock recovery unit and a clock generation unit associated with phase interpolators. The digital PLL can employ a set of accumulators, proportional and integral filter component, generator component, feedback path between the output and input of the digital PLL, and other digital signal processing components. The proportional and integral filter component can be configurable to set a loop damping factor and a loop bandwidth of the filter, based on respective parameters. Based on the filter output, the generator component can generate output phase information, comprising phase modification requests, that can be transmitted to another phase interpolator(s) associated with a transmitter or other component(s) of the device to facilitate generating a clock for the transmitter or other component(s).

Abstract: In one embodiment, a distributed oscillator computes a first error value based on a first state value for the distributed oscillator and first state values for other distributed oscillators, and computes a second error value based on a second state value for the distributed oscillator and second state values for the other distributed oscillators. The distributed oscillator computes a new first state value for the distributed oscillator based on the first error value, the first state value for the distributed oscillator, and the second state value for the distributed oscillator, and computes a new second state value for the distributed oscillator based on the second error value, the first state value for the distributed oscillator, and the second state value for the distributed oscillator. The distributed oscillator transmits the new first state value and the new second state value to the other distributed oscillators.

Abstract: A radio communication device includes: a full-digital array that has a first antenna element group including multiple antenna elements and that has no analog variable phase shifter; and a hybrid beamformer that has a second antenna element group including multiple antenna elements and that has an analog variable phase shifter.