Abstract:
Technology for a Next Generation NodeB (gNB) operable to communicate a channel state information reference signal (CSI-RS) resource element (RE) mapping configuration to a user equipment (UE) is disclosed. The gNB can determine a CSI-RS RE mapping configuration that 5 identifies resource elements for a CSI-RS resource at a frequency domain location (k) and at a time domain location (l). The gNB can encode the CSI-RS RE mapping configuration for transmission to the UE via higher layer signaling.
Abstract:
Technology for a next generation node B (gNB) operable to measure crosslink signal-to-interference ratio (SINR) in a dynamic time division duplex (TDD) new radio (NR) system is disclosed. The gNB can encode a downlink interference measurement reference signal (IM-RS), for transm 5 ission to a first user equipment (UE), in a selected comb of an IFDMA comb structure. The gNB can decode an uplink IM-RS from a second UE received in the IFDMA comb structure, wherein the uplink IM-RS is time aligned with the downlink IM-RS. The gNB can determine the crosslink interference in the IFDMA comb structure based on the downlink IM-RS and the uplink IM-RS.
Abstract:
Disclosed are apparatuses for communication devices. An apparatus for a communication device includes control circuitry configured to determine a discrete Fourier transform (DFT) of a constant amplitude zero autocorrelation waveform (CAZAC) sequence appended with zeros in the time domain to generate a frequency domain interpolated CAZAC sequence. The control circuitry is also configured to determine an inverse discrete Fourier transform (IDFT) of the frequency domain interpolated CAZAC sequence to generate a demodulation reference signal (DMRS), and cause the DMRS to be transmitted through a cellular data network. An apparatus for a communication device includes control circuitry configured to perform a Fourier transform on a received DMRS to obtain a resulting signal, and use the resulting signal as a reference to demodulate orthogonal frequency-division multiplexing (OFDM) symbols. The control circuitry is also configured to perform a minimum mean squares estimation (MMSE) channel estimation on the resulting signal.
Abstract:
Techniques discussed herein can facilitate RS (Reference Signal) sequence generation and mapping, and/or precoder assignment, for NR (New Radio). One example embodiment employable at a NR wireless communication device comprises processing circuitry configured to: generate one or more PN (Pseudo Noise) sequences based at least in part on an initial state of a PN generator; extract, for each PRB (Physical Resource Block) of one or more PRBs, an associated portion of an associated PN sequence of the one or more PN sequences, based at least in part on a reference subcarrier index, independent of a bandwidth part configuration and of a maximum supported number of PRBs; and generate, for each PRB of the one or more PRBs, an associated set of RS(s) for that PRB based at least in part on the extracted associated portion of the associated PN sequence for that PRB.
Abstract:
Described is an apparatus of a User Equipment (UE). The apparatus may comprise a first circuitry and a second circuitry. The first circuitry may be operable to process a Downlink Control Information (DCI) received via a first UE beam, the DCI carrying an indicator for switching to a second UE beam. The second circuitry may be operable to generate a confirmation transmission for the second UE beam based on a trigger indicator. The apparatus may also comprise an interface for inputting the DCI to one or more processors of the apparatus and for outputting the confirmation transmission to a transmission circuitry.
Abstract:
Technology for a base station operable to encode guard interval (GI) discrete Fourier transform (DFT) spread orthogonal frequency-division multiplexing (OFDM) (GI-DFT-s-OFDM) data symbols for transmission to a user equipment (UE) is disclosed. The base station can identify GI-DFT-s-O 5 FDM data symbols for transmission to the UE. The base station can encode the GI-DFT-s-OFDM data symbols for transmission to the UE in a subframe. The subframe can be in accordance with a flexible subframe structure that begins with a demodulation reference signal (DMRS) sequence followed by a GI sequence in a first symbol of the subframe. The subframe can further comprise one or 10 more subsequent symbols in the subframe that each include a GI-DFT-s-OFDM data symbol followed by a GI sequence.
Abstract:
Embodiments include apparatuses, methods, and systems that may be used in a UE in a mobile communication network to communicate with a gNB. An apparatus may include a memory and processing circuitry coupled with the memory. The processing circuitry may cause coarse time and frequency synchronization information, obtained from primary and secondary synchronization signals (PSS/SSS), to be stored in the memory. Based on the coarse time and frequency synchronization information, the processing circuitry may decode a physical broadcast channel to obtain a first system information, and may acquire a second system information based on the first system information. Based on the first and second system information, the processing circuitry may cause a transmission of a PRACH, to trigger a transmission of a TRS by the gNB. Other embodiments may also be described and claimed.
Abstract:
Technology for a user equipment (UE) operable to enhance the receiving performance of a reference signal for beam refinement is disclosed. The UE can determine a receiving beam sweeping structure for each receiving beam of a plurality of receiving beams. The UE can calculate the receiving power rj for each of the plurality of receiving beams. The UE can select a refined receiving beam having a highest receiving power rj.
Abstract:
Devices and methods of on-demand system information block (SIB) transmission are generally described. A user equipment (UE) can be configured to determine a beam index during a beam sweeping procedure, based on a signal quality metric associated with a received synchronization signal. The UE can encode for directional transmission based on the beam index, a random access procedure (RACH) preamble sequence. The RACH preamble sequence can include a system information request. The UE can decode system information configuration received in response to the system information request. The UE can initiate a RACH process using another RACH preamble sequence, based on the received system information configuration. The encoded RACH preamble sequence with the system information request can be transmitted multiple times using the preferred beam index.
Abstract:
Technology for a next generation node B (gNB) operable to transmit in multiple bandwidth parts (BWPs) is disclosed. The UE can determine a channel state information reference signal (CSI-RS) symbol location in a first bandwidth part (BWP). The UE can determine a CSI-RS symbol location in a second BWP. The UE can encode the CSI-RS in one or more of the first BWP or the second BWP for transmission to a user equipment (UE). The UE can have a memory interface configured to send to a memory the CSI-RS symbol location.