This disclosure relates to the wireless communication field, for example, is applied to a wireless local area network supporting the 802.11 standard, and in particular, to a physical layer protocol data unit (PPDU) transmission method and a related apparatus. The method includes: A first communication device generates and sends a first PPDU, where the first PPDU carries rotation coefficient indication information indicating a rotation coefficient of at least one field, which comprises at least one of an extremely high throughput short training field (EHT-STF) or an extremely high throughput long training field (EHT-LTF) and correspond to a frequency segment on which the first PPDU is transmitted, and the first PPDU is a sub-PPDU in an aggregated PPDU or a PPDU on a frequency segment among at least one PPDU in a multi-frequency segment transmission mode.

An example method for transmitting a random access preamble comprises selecting (502) a random access preamble configuration from a plurality of predetermined random access preamble configurations. The method further includes determining (504) a time interval in which to transmit the random access preamble. The method further comprises transmitting (506) the random access preamble according to the selected random access preamble configuration. Each of the plurality of random access preamble configurations comprises a combination of (a) a single root sequence from a predetermined set of one or more root sequences, (b) a single cyclic shift of a predetermined plurality of cyclic shifts for the root sequence, and (c) a single starting position of two or more predetermined starting positions within time intervals allocated for random access preamble transmission.

A wireless communication device may receive a configuration of at least one radio resource control (RRC) parameter for X channel measurement reference signal (CMR) resource sets or X CMR resource subsets of CMRs from a corresponding set of CMR resources. The parameter X can be an integer greater than 1. The wireless communication device may measure channel quality for at least one CMR resource of the X CMR resource sets or the X CMR resource subsets according to the configuration. The wireless communication device may send a report including at least one of a CMR index or channel quality to the wireless communication node. The report may include at least one of: a CMR index, or a channel quality.

Provided is a radio communication device which can separate propagation paths of antenna ports and improve a channel estimation accuracy even when using virtual antennas. The device includes: a mapping unit which maps a data signal after modulation to a virtual antenna and a virtual antenna; a phase inversion unit which inverts the phase of S0 transmitted from an antenna port in synchronization with a phase inversion unit between the odd-number slot and the even-number slot; the phase inversion unit which inverts the phase of R0 transmitted from the antenna port; a phase inversion unit which inverts the phase of S1 transmitted from an antenna port in synchronization with a phase inversion unit; and the phase inversion unit which inverts the phase of R1 transmitted from an antenna port.

This disclosure provides a transmission method and a first communication device. The method includes: transmitting, by a first communication device, a target reference signal that belongs to a first type of reference signal in a case that the first communication device receives indication information from a second communication device and the indication information indicates transmission of the first type of reference signal, where a reference signal sequence of the first type of reference signal is generated based on a first characteristic.

Devices, systems and methods for a fifth generation (5G) or new radio (NR) system comprising multiplexing, by a gNodeB (gNB), a physical broadcast channel (PBCH) and an associated demodulation reference signal (DMRS) in a time division multiplexing (TDM) manner; and transmitting, by the gNB, the PBCH by employing a Discrete Fourier Transform-spread-orthogonal frequency-division multiplexing (DFT-s-OFDM) waveform and its associated DMRS.

A method includes receiving a first plurality of symbols comprising complex portions. The method further includes applying conjugate symmetry to the first plurality of symbols, producing a second plurality of symbols comprising no complex portions. The method further includes transforming the second plurality of symbols using an inverse fast Fourier transform, producing a third plurality of symbols. The method further includes interpolating the third plurality of symbols, generating a short training field comprising at least one real portion of the third plurality of symbols, generating a long training field comprising at least one real portion of the third plurality of symbols, and transmitting the short training field and long training field in a WPAN.

Aspects of the present disclosure relate to a technique for determining quasi co-location (QCL) and/or transmission configuration information (TCI) state assumption information for a dynamic control resource set (CORESET). A user equipment (UE) may receive and/or detect a downlink control information (DCI) that schedules at least one dynamic CORESET and indicates a TCI state from a list of one or more TCI states for the dynamic CORESET. The UE may apply the indicated TCI state for processing physical downlink control channel (PDCCH) transmissions in the dynamic CORESET when one or more conditions are met.

A method, wireless device and network node are disclosed. According to one aspect, a method for a wireless device includes receiving a configuration of a reference signal resource set from the network node, the reference signal resource set being a set of single-symbol and single antenna port reference signal resources in at least one slot; and based on at least one parameter of the received configuration, determining whether the UE can assume a same antenna port for all reference signal resources of the reference signal resource set.

Methods and systems for adjusting reference signal reporting based on path loss and fading and cell edge conditions experienced by wireless devices in 5G EN-DC networks. As the path loss increases, a period between reference signal reports (or a frequency of reference signal reports) can be increased. This ensures continued quality of service for the wireless devices. Reference signals can include SRS, DMRS, PTRS, etc.