这就是通常所说的信道测量(channel sounding)。本章将要描述5G NR对这种信道测量的支持。特别是,我们将叙述特殊的参考信号,即作为信道测量的基础的下行链路的信道状态信息参考信号(CSI-RS)和上行链路的测量参考信号(SRS)。我们也将提供下行链路物理层测量和相应的终端报告机制的5G NR框架的概述。 Many transmission ...
SRS is usually (not mandatory) configured across the whole channel band to allow gNB to perform UL channel estimate over the whole frequency span regardless of the existence of PUSCH. Several different usages : beamManagement, codebook, nonCodebook, antennaSwitching Often (with antennaSwitching) it...
DMRS is used to estimate the radio channel for demodulation. DMRS is UE-specific, can be beamformed, confined in a scheduled resource, and transmitted only when necessary, both in DL and UL. To support multiple-layer MIMO transmission, multiple orthogonal DMRS ports can be schedu...
Channel State Information Reference Signal (CSI-RS) As a DL-only signal, the CSI-RS the UE receives is used to estimate the channel and report channel quality information back to the gNB. During MIMO operations, NR uses different antenna approaches based on the carrier frequency. At lower fre...
In this webinar, you will learn about single- and multi-user MIMO in 5G NR, as well as common beamforming techniques and scenarios. We will cover different techniques to estimate the channel or channel information for beamforming purpose, how the UE communicates the necessary information back to...
这是我们5GExplained系列的新内容。在本视频中,我们将讨论5GNR中用 于信道探测和信道估计的信号。 首先,我们将定义信道探测。然后,我们将研究在下行链路上支持信道探测的 CSI-RS(信道状态信息参考信号),以及在上行链路上等效的SRS(探测参考 信号)。 许多5GNR都依靠波束赋形给接收方提供足够好的SINR,特别是对于毫米...
reference signal can be used to estimate the channel corresponding to specific antenna port. The reference signals can also be used by the UE to derive channel-state information related to the antenna port. The set of antenna ports defined in 3gpp specification 38.211 for 5G NR is listed below...
UE indicating support of this feature shall indicate support of srs-CarrierSwitch. BC No N/A N/A SRS-SwitchingTimeNR Indicates the interruption time on DL/UL reception within a NR band pair during the RF retuning for switching between a carrier on one band and another (PUSCH-less) ...
ss-PBCH-BlockPower (-36): This is the power at which gNB transmit the reference signal (SSB block power). UE estimate PL (Path Loss) based on this power and the reference power that is measured by UE p0-AlphaSets: This section likely contains a set of alpha values and corresponding ...
NR sidelink and V2X sidelink for Cross Link Interference: CBR(Channel Busy Ratio) measurements. SRS resources for Cross Link Interference(CLI): Measurement results per SRS resource; SRS resource(s) indexes. CLI-RSSI (Cross Link Interference RSSI) resources: ...