A method may include generating an estimated time offset based on a reference signal in a communication system, and adjusting a transform window in the communication system based on the estimated time offset, wherein the estimated time offset is generated based on machine learning. Generating the estimated time offset may include applying the machine learning to one or more channel estimates. Generating the estimated time offset may include extracting one or more features from one or more channel estimates, and generating the estimated time offset based on the one or more features. Extracting the one or more features may include determining a correlation between a first channel and a second channel. The correlation may include a frequency domain correlation between the first channel and the second channel. Extracting the one or more features may include extracting a subset of a set of features of the one or more channel estimates.

A method and a device for wireless communication are disclosed. The base station transmits a first radio signal on first frequency-domain resources in a first time window, and then transmits a first signaling. The center frequency of the first frequency-domain resources is a first frequency; the first frequency-domain resources comprise X subcarrier(s); a center frequency of a first carrier to which the first frequency-domain resources belong is a second frequency; an interval between the first frequency and the second frequency in frequency domain is related to a subcarrier spacing of the X subcarrier(s); the first signaling is used to determine a feature ID of a transmitter of the first radio signal in the first carrier. The present disclosure can independently configure the center frequency of a carrier and the center frequency of a user equipment to avoid resource waste and reduce synchronization complexity.

Included are a demodulation unit 20 that demodulates a received OFDM modulation signal to acquire a demodulated constellation signal, an ideal constellation signal generation unit 312 that generates an ideal constellation signal from the demodulated constellation signal, a data extraction unit 313 that extracts signal data included in some symbol sections including a known reference symbol, among all symbol sections, from the demodulated constellation signal and the ideal constellation signal, a phase error calculation unit 314 that calculates the phase error of the demodulated constellation signal for the ideal constellation signal, with respect to the extracted signal data, a phase error characteristics estimation unit 315 that estimates the frequency characteristics of the phase error, and a phase error correction unit 316 that corrects the phase error of the demodulated constellation signal, based on the frequency characteristics of the phase error.

Embodiments of the present application relate to a method and an apparatus for initial access of a user equipment (UE). According to an embodiment of the present application, a method can include: a method may include: detecting, at a first UE, a first synchronization signal block (SSB); determining whether a subcarrier offset value indicated by the first SSB is within a first range or a second range; and determining whether the first SSB has a valid access configuration for the first UE based on an indication in master system information (MIB) of the first SSB. Embodiments of the present application can facilitate the NR-Light UE to detect the initial access parameters, thereby implementation of the initial access procedure for the NR-Light UE.

A method includes calculating first correlation values corresponding to a first symbol duration based on input samples, the input samples being generated from a received signal; calculating phase differences respectively corresponding to the input samples based on the first correlation values and second correlation values corresponding to a second symbol duration preceding the first symbol duration; updating accumulative phase differences respectively corresponding to the input samples based on the phase differences; and detecting a symbol boundary based on the updated accumulative phase differences.

A user equipment (910) is provided for use in a cellular network. The user equipment includes a transceiver (1010), a processor (1020), and a memory (1030). The user equipment (910) is configured to determine, for a data transmission, a mapping form a demodulation reference signal (DMRS) to a PNT-RS. A DMRS resulting signal is generated from a subset of DMRS for a first resource element in a subcarrier. The DMRS resulting signal is copied from the first resource element to a second resource element assigned to PNT-RS in the subcarrier. The data transmission is transmitted using the DMRS resulting signal and the PNT-RS.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive signaling, such as a downlink control information (DCI), that identifies a transmission configuration state from a set of transmission configuration states, from which the UE may determine a receiver timing. The UE may then receive a downlink transmission, such as a physical downlink shared channel (PDSCH), from one or more transmission/reception points (TRPs). The UE may use the receiver timing to decode the downlink transmission by performing a fast fourier transform (FFT) with the receiver timing for the downlink transmission.

A wireless local area network (WLAN) station receiver has a center frequency offset (CFO) estimator and an CFO table with an association between a CFO value from a recently received access point packet for which the station is associated according to 802.11. The receiver performs a comparison between the CFO estimate of the received packet and the CFO value from the CFO database, and powers the receiver down if the comparison exceeds a threshold. The threshold may be an absolute value in parts per million, or may include a time drift compensation component.

Provided are a configuration method and a transmission method of a new reference signal for frequency offset estimation in a novel wireless communication system. The method may include configuring a synchronization signal to be transmitted through a first bandwidth part of one or more bandwidth parts configured by dividing an entire bandwidth into one or more parts, allocating the one or more reference signals for estimating the frequency offset on one or more resources other than a resource for configuring the synchronization signal, and transmitting the one or more reference signals for estimating the frequency offset.

A terminal includes a control unit that uses, in a case where a reference signal associated with a channel satisfies a condition, the reference signal to perform synchronization without referring to a QCL (Quasi-Co-Location) source for the reference signal, and a reception unit that receives the channel after the synchronization is performed by the control unit by using the reference signal.