Qualcomm Incorporated

Intel Corporation

Intel IP Corporation

Alexander Vladimir Sverdlov

Michael Levitsky

Assaf Touboul

Gideon Shlomo Kutz

Daniel Paz

Haim Mendel Weissman

Tom Barak

Shay Landis

Guy Wolf

Tom Harel

Hung Dinh Ly

Gokul Sridharan

Arvind Vardarajan Santhanam

Assaf Yaakov Kasher

Ran Berliner

Igor Gutman

Michael Genossar

Michael Lee McCloud

Cheol Hee Park

Tal Oved

Lior Uziel

Moshe Ben-Ari

Carl Hardin

Shmuel Vagner

Robert Zokaim

Yaniv Kaver

Methods, systems, and devices for wireless communications are described. For example, a transmitting device, such as a user equipment (UE) or network entity, may apply a pre-equalization operation and a normalization operation prior to transmitting a signal with an intra-symbol duty cycle. A receiving device (e.g., a UE or network entity) may receive the pre-equalized signal with a relatively low demodulation complexity based on the transmitting device pre-equalizing the signal. Additionally, or alternatively, the transmitting device may transmit an indication of the duty cycle to the receiving device in addition to the signal. The receiving device may divide the signal into streams and process the streams based on the indication of the duty cycle. Splitting the signal into streams and processing the streams to estimate symbols of the signal may support a relatively low demodulator complexity at the receiving device.

High performance low power link for ultra-wideband

Methods, systems, and devices for wireless communications are described. In some examples, the first wireless device may transmit, to a second wireless device, a control message indicating a set of pre-equalization transmission schemes supported by the first wireless device for receipt of messaging pre-equalized by the second wireless device. The first wireless device may transmit a measurement report that indicates a measurement of a wireless channel between the first wireless device and the second wireless device, where the measurement may be a signal-to-interference and noise (SINR) measurement. The first wireless device may receive a control signal indicative of a first pre-equalization transmission scheme to be used by the second wireless device for pre-equalization based at least in part on the set of pre-equalization transmission schemes and the measurement. The first wireless device may receive, via the wireless channel, a downlink message pre-equalized in accordance with the first pre-equalization transmission scheme.

Techniques for dynamic pre-equalization switching

Various aspects of the present disclosure generally relate to wireless communication. Some aspects more specifically relate to discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) waveform pre-equalization for MIMO communications. A receiver device, such as an extended reality (XR) device, may be configured to offload a portion of data processing to a companion device, such as a user equipment (UE). In some aspects, the UE may generate a DFT-S-OFDM waveform and may apply a pre-equalization to the DFT-S-OFDM waveform. Applying the pre-equalization to the DFT-S-OFDM waveform may include applying a minimum mean square error (MMSE) pre-equalization to the DFT-S-OFDM waveform. The receiver device may receive the pre-equalized DFT-S-OFDM waveform from the UE and may process the pre-equalized DFT-S-OFDM waveform. For example, the receiver device may decode the pre-equalized DFT-S-OFDM waveform without performing fast Fourier transform (FFT) or inverse discrete Fourier transform (IDFT) operations.

Discrete Fourier transform spread orthogonal frequency division multiplexing waveform pre-equalization

A base station may configure a user equipment (UE) with a subset of reference signal (RS) configurations among a set of RS configurations, and transmit a plurality of RSs based on the subset of RS configurations. The RS may be a demodulation RS (DMRS). The plurality of RSs may be configured to span each of the plurality of resource elements (REs) in the active bandwidth part (BWP). The UE may receive the plurality of RSs based on the subset of RS configurations and perform a spur detection based on the plurality of RSs received based on the subset of RS configurations. Each RS configuration of the set of RS configurations may be associated with at least one of the subset of RS configurations that is associated with the plurality of RSs spanning each of the plurality of REs in the active BWP.

RS pattern associated with dynamic spur detection

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter device may transmit, to a receiver device, an initial message associated with a communication using a first code rate. The transmitter device may receive, from the receiver device, first feedback information indicating that the communication was not successfully decoded by the receiver device. The transmitter device may transmit, to the receiver device based at least in part on the reception of the first feedback information, one or more retransmissions associated with the communication including a first retransmission, wherein the first retransmission includes a first number of bits to lower an effective code rate of the communication to a second code rate. The transmitter device may receive, from the receiver device, second feedback information indicating that the communication was successfully decoded by the receiver device. Numerous other aspects are described.

Techniques for a multiple incremental redundancy retransmission scheme

A transmitting device may select frequency domain resources for an alert transmission based on a severity level of the alert transmission. The transmitting device may determine a severity level of an alert transmission to be transmitted on one or more available channels. The transmitting device may determine a presence of one or more systems configured to transmit on one or more neighbor channels of the one or more available channels. The transmitting device may select, for the alert transmission, frequency domain resources within the one or more available channels based on the presence of the one or more systems and the severity level. The frequency domain resources for a highest severity level transmission are spaced further apart from the one or more neighbor channels in the frequency domain than resources for a lower severity level transmission. The transmitting device may transmit the alert transmission on the frequency domain resources.

Mitigation of inter-band interference to receivers by allocating alerts in frequency domain based on severity

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive, from a second UE and using a first fast Fourier transform (FFT) window configuration, a physical sidelink control channel (PSCCH) signal associated with a physical sidelink shared channel (PSSCH) signal. The UE may identify, based at least in part on the reception of the PSCCH signal, one or more values of one or more parameters estimated from the PSCCH signal. The UE may select, based at least in part on the one or more values of the one or more parameters, a second FFT window configuration to be used to receive the PSSCH signal. The UE may receive, from the second UE, the PSSCH signal using the second FFT window configuration, Numerous other aspects are described.

Techniques for optimized fast Fourier transform windows

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may perform online spur detection and mitigation scheme. The UE may identify spurs during operation, in real time, and apply cancelation and noise equalization to address identified spurs. The UE may apply a high pass filter to reference signals. During a symbol, the UE may apply the high pass filter by estimating the channel on one or more neighbor tones (e.g., tones of higher frequency and tones of lower frequency that also carry reference symbols). Because the UE may assume that a channel will generally be smooth, and that noise may vary slowly or steadily across frequency resources, the UE may compare the channel noise of a particular tone to an average or normalized channel noise of the one or more neighbor tones.

Online spur detection and mitigation

Methods, systems, and devices for wireless communications are described. The method includes communicating control signaling scheduling a sidelink transmission via a physical sidelink channel, receiving, by a first user equipment (UE), the sidelink transmission including one or more reference signals from a second UE via the physical sidelink channel based on the control signaling, and monitoring the physical sidelink channel based on time synchronization, frequency synchronization, or both, determined using the one or more reference signals.

Physical sidelink channel packet-based synchronization

Various aspects of the present disclosure generally relate to wireless communication. A wireless communication device may have an apparatus that aligns the non-linearity between transmit chains of the wireless communication device that are driven by the same digital port. The apparatus may adjust an amplification power out or an amplification saturated power to adjust a ratio between the amplification saturated power and the amplification power out for one or more transmit chains of the wireless communication device. The apparatus may adjust the ratios of transmit chains to align the ratios of the transmit chains for more consistent management of non-linear characteristics of the chain components. Numerous other aspects are described.

Power adjustment to align transmit chain power ratios

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may determine a demodulation reference signal (DMRS) configuration and a physical uplink shared channel (PUSCH) transmission mode for a user equipment to use for one or more uplink transmissions. The base station may transmit a dynamic joint indication of the DMRS configuration and the PUSCH transmission mode. Numerous other aspects are provided.

Dynamic joint indications of a demodulation reference signal configuration and a physical uplink channel transmission mode

The apparatus operates communicates with a second wireless device during an active period and performs a radio impairment calibration during a periodic silent period. The calibration may include a receiver calibration, e.g., including gain state training. The calibration may comprise a transmitter calibration.

Transceiver calibrations at silent periods

Exploratory beamforming training techniques for 60 GHz devices are described. In one embodiment, for example, an apparatus may comprise a station (STA) comprising logic, at least a portion of which is in hardware, the logic to identify an exploratory link quality associated with an exploratory beamforming configuration for a directionally-beamformed wireless link, determine whether to revert to a previous beamforming configuration for the directionally-beamformed wireless link based on the exploratory link quality, and in response to a determination to revert to the previous beamforming configuration, send a frame comprising a rollback notification for the directionally-beamformed wireless link. Other embodiments are described and claimed.

Exploratory beamforming training techniques for 60 GHz devices

Some demonstrative embodiments include devices, systems and methods of scrambling wireless transmissions. For example, an apparatus may include a selector to select a selected scrambling seed based on a number of codewords in a packet to be transmitted; and a scrambler to scramble bits of the packet based on a periodic sequence of scrambling bits, the sequence of scrambling bits being generated according to the selected scrambling seed.

Growing community of inventors

Rehovot, Israel

Alexander Vladimir Sverdlov