In accordance with a first aspect of the present disclosure, a channel equalizer is provided for use in a near field communication (NFC) device, the channel equalizer comprising: a filter configured to receive an input signal and to generate a filtered output signal; an estimator configured to determine filter coefficients to be used by said filter; a synchronizer configured to determine when to enable the channel equalizer and to provide one or more corresponding control signals to the estimator. In accordance with a second aspect of the present disclosure, a corresponding method of operating a channel equalizer for use in a near field communication (NFC) device is conceived.

A channel measurement method and a communications apparatus. The method includes: a terminal device receives precoded reference signals from a network device, where the precoded reference signals are obtained by precoding reference signals based on K angle vectors; and generates and sends first indication information, where the first indication information is used to indicate P weighting coefficients corresponding to P angle-delay pairs, the P weighting coefficients are determined based on the precoded reference signals, each of the P angle-delay pairs includes one angle vector and one delay vector corresponding to the angle vector, a delay vector corresponding to each angle vector is preconfigured, each angle vector and the delay vector corresponding to each angle vector are obtained through uplink channel measurement, and the P angle-delay pairs and the P weighting coefficients corresponding to the P angle-delay pairs are used to determine a precoding matrix.

The present invention provides a method for measuring a channel between terminals in a wireless communication system, and a device for the method. Particularly, a method for a first terminal to measure a channel in a wireless communication system may comprise: a step of transmitting, to a base station, a first message requesting sounding reference signal (SRS) configuration information associated with a second terminal; a step of receiving, from the base station, a second message including at least one of the SRS configuration information associated with the second terminal and identification information of the second terminal; a step of receiving at least one SRS from the second terminal, by using an SRS configuration associated with the second terminal identified based on the received second message; and a step of measuring a channel with the second terminal by using the received at least one SRS.

Implementations of this disclosure generally may relate to the field of wireless communications. More specifically, implementations described in this disclosure relate to different 3GPP LTE and LTE-A system enhancements to address the issue and support reliable V2X operation in the high mobility environments. Several solutions to improve the V2X system performance in the high mobility vehicular channel propagation conditions are described. Some aspects relate to the suggestion of a new DMRS patterns within individual subframes that promote more accurate CFO estimation. Moreover, another aspect provides DMRS mapping or puncturing patterns to transmit individual DMRS in a periodic pattern on respective OFDM/SC-FDMA symbols so that they do not occupy all REs of the OFDM/SC-FDMA symbols, respectively.

The present invention relates to a signal processing apparatus and an image display apparatus including the same. The signal processing apparatus for processing a baseband signal demodulated from an RF signal, includes: a synchronizer; a channel estimator; an equalizer; an error corrector to perform error correction based on a signal output from the equalizer; and a mean square error calculator to calculate a mean square error based on a difference between an input signal from the equalizer and a reference signal, wherein when the RF signal includes a co-channel interference signal, the error corrector performs error correction by using a mean square error in a time domain or mean square errors in a time domain and a spatial domain. Accordingly, a baseband signal, from which a defect is removed, may be obtained in response to various communication channels or broadcast channels.

Methods, systems, and devices for wireless communications are described for configuring a user equipment (UE) for reference signal measurement while operating according to a discontinuous reception (DRX) configuration. The DRX configuration may include periodic DRX ON-durations, during which the UE is to be in an active mode for reception and transmission of signals, and between which the UE may transition to a low-power inactive mode. One or more reference signals may be scheduled for transmission by the base station during periods in which the UE may be in the inactive mode, and the UE may skip monitoring one or more of the reference signals while in the inactive mode. For one or more reference signal occasions, the UE may determine, based at least in part on a change in a channel quality metric, to be in a limited active mode in order to measure the reference signal.

Methods and apparatuses are described for configuring a downlink (DL) reference signal (RS) for an electronic device (ED). Configuration information associated with the DL RS is received in a first communication from a location management function (LMF) via LTE positioning protocol (LPP). In a communication from a serving cell via radio resource control (RRC), an identifier (ID) of the DL RS and a cell ID of a cell that originates the DL RS are received. The configuration information received in the first communication also includes the ID of the DL RS and the cell ID. A sounding reference signal (SRS) is transmitted to the cell identified by the cell ID, according to path loss (PL) information or spatial domain transmission filter (TF) information associated with the DL RS.

Embodiments of this disclosure disclose an uplink transmission method and apparatus, a device, and a storage medium. The uplink transmission method is applied to a terminal device. The uplink transmission method includes: receiving indication information sent by a network device, where the indication information is used to indicate that a plurality of first uplink transmissions satisfy a quasi co-location relationship; and performing the plurality of first uplink transmissions based on the indication information.

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may be configured to transmit sounding reference signals (SRSs) on a first carrier over multiple symbols within a slot, the first carrier being different from a second carrier on which the UE communicates with a base station during the slot. For example, the base station may transmit, to the UE, an SRS configuration for the UE to transmit the SRSs. In accordance with the control message, the UE may tune to the first carrier and may transmit the SRSs over the multiple symbols within the slot on the first carrier before tuning back to the second carrier. In some examples, the UE may transmit a capability message to the base station indicating that the UE supports transmitting SRSs over multiple symbols within a slot before tuning back to a different carrier.

Methods, systems, and devices for wireless communications are described. Generally, a network entity may configure a user equipment (UE) with transmission time interval (TTI) format information, and the UE may determine time domain windows for joint channel estimation based thereon. The network entity may also configure the UE with an association between one or more demodulation reference signal (DMRS) ports and one or more phase-tracking reference signal (PTRS) ports. The UE may maintain phase continuity across physical uplink channel transmissions within a time domain window in which a PTRS is scheduled when DMRS and PTRS are transmitted via the associated DMRS and PTRS ports (e.g., when the PTRS-DMRS association is identical across the time domain window). In some cases, the UE may not maintain phase continuity across multiple physical uplink channel transmissions occurring within a time domain window when a PTRS is also scheduled within the time domain window.