The present invention provides an operation method of an user equipment in relation to CSI-RS in a wireless communication system.

Particularly, an operation method performed by a user equipment (UE) according to the present disclosure includes receiving a higher layer signaling including resource configuration information related to an aperiodic transmission of beamformed CSI-RS from a base station (BS); receiving a first DCI format including first control information indicating that there is an aperiodic transmission of the beamformed CSI-RS from the BS; measuring the beamformed CSI-RS based on the received resource configuration information; and reporting a measurement result of the beamformed CSI-RS to the BS.

A method of channel estimation enhancement is provided. In a wireless communications system, a transmitting device transmits a long preamble frame comprising a first training field, a signal field, and a second training field. The signal field has a beam-change indicator bit indicates whether there is beam change between the first training field and the second training field. A receiving device receives the long preamble frame, performs a first channel estimation based on the first training field, and performs a second channel estimation based on the second training field. If the beam-change indicator bit indicates negative beam change, then the receiving device performs channel estimation enhancement by combining the first channel estimation and the second channel estimation. As a result, channel estimation performance is improved.

The technology of this application relates to communications systems. In one example, a network device sends a first message to a terminal device, where the first message includes configuration information of a reference signal resource. The network device sends a second message to the terminal device, where the second message includes a first bit field and/or a second bit field, the first bit field is used to indicate an availability status of the reference signal resource, and the second bit field is used to indicate that the terminal device uses a synchronization signal/physical broadcast channel resource block signal resource and/or the reference signal resource.

To provide a phase noise optimization device and a phase noise optimization method which are capable of automatically measuring optimum phase noise according to an offset frequency. There is included a phase noise data generation unit 28 that generates at least two types of phase noise data corresponding to at least two low-pass filters (LPFs) 15a and 15b selected by a filter selection unit 16 in at least one measurement frequency range, set in advance, out of a plurality of measurement frequency ranges, a comparison unit 29 that compares at least two types of phase noise data, and a phase noise optimization unit 30 that generates optimized phase noise data based on a comparison result of the comparison unit 29.

A method for generating a beamforming training (BFT) unit includes generating a physical layer (PHY) preamble of the BFT unit and generating a first encoding block and a second encoding block using PHY data and MAC data, including at least one of i) using a number of padding bits in a PHY layer of the BFT unit such that the BFT unit consists of the PHY preamble, the first encoding block, and the second encoding block, and ii) generating a MAC protocol data unit (MPDU) having a length such that the BFT unit consists of the PHY preamble, the first encoding block, and the second encoding block.

A data receiving circuit includes: a comparator for amplifying a voltage difference between input data and an initial reference voltage and outputting double-ended signals as a result of the amplification; and a plurality of data paths, each of the plurality of data paths receiving the double-ended signals, where an i-th data path is used to sample based on an i-th clock to obtain an i-th bit data, and the i-th data path includes: an adjustment circuit for adjusting a voltage difference between the double-ended signals based on a previous second bit data to a previous N-th bit data to generate double-ended adjustment signals; and a sampling circuit for comparing and amplifying, during a valid period of the i-th clock, a voltage difference between the double-ended adjustment signals based on the previous first bit data and outputting the i-th bit data.

A wireless transmit receive unit (WTRU) may receive a physical control channel transmission including control information for a data transmission. The WTRU may determine between a first type of waveform and a second type of waveform for the data transmission based on at least a format of the control information. Further, the WTRU may transmit the data transmission using the determined type of waveform. In an example, the type of waveform is further determined based on indication information included in the physical control channel transmission. Also, the first type of waveform may be an orthogonal frequency division multiplexing (OFDM) waveform and the second type of waveform is a discrete Fourier transform spread OFDM (DFT-S-OFDM) waveform. Moreover, the determination between the first type of waveform and the second type of waveform may be further based on an indication to use the DFT-S-OFDM waveform.

This disclosure relates to techniques for performing wireless communications including exchanging information related to capability of processing reference signals. A user equipment device may provide capability information to a network. The capability information may indicate a number of reference signal resources that the user equipment device can process in a slot or other defined period of time. The user equipment device and the network may share a common set of definitions, counting rules, and approaches for interpreting the capability information. The network may configure reference signals for the user equipment device.

A wireless transmit receive unit (WTRU) may receive configuration information regarding one or more range-specific physical sidelink control channel (PSCCH) resource pools. In an example, each range-specific PSSCH resource pool includes one or more PSCCH resources. The WTRU may determine a range between the first WTRU and a second WTRU. Further, the WTRU may determine a range-specific PSSCH resource pool of the one or more range-specific PSSCH resource pools based on the range. Also, the WTRU may determine a PSCCH resource within the determined range-specific PSSCH resource pool. Moreover, the WTRU may transmit control information to the second WTRU in the determined PSCCH resource. Additionally or alternatively, the one or more PSCCH resources are one or more PSCCH resource units (PRUs). Additionally or alternatively, the range is determined based on receipt of positioning information from the second WTRU.

In accordance with an embodiment, a phase noise estimation method includes: obtaining, by a receive end, first information indicating a first parameter corresponding to interference information of a first phase tracking reference signal (PTRS), wherein the first parameter comprises one or more of a first phase set or a first amplitude set; obtaining, by the receive end, a first signal, wherein the first signal is determined based on the first parameter and the interference information of the first PTRS, wherein an amplitude of the first signal meets a first threshold; and determining, by the receive end based on the first information and the first signal, an estimated value of a phase noise corresponding to the first PTRS.