传输数据将主要由下行共享信道携带[19],其中嵌入了多种参考信号,例如解调参考信号(DMRS, Demodulation Reference Signal)、CSI-RS以及相位跟踪参考信号(PTRS, Phase Tracking Reference Signal)。DMRS主要用于数据的相干解调,NR支持不同嵌入方式...
Demodulation Reference Signals (DMRS) in 5G NR From the series: 5G Tutorial Learn about demodulation reference signals or DMRS in 5G New Radio. This video discusses their use in joint precoding and channel estimation. You will also learn about the different settings available ...
estChannelGridPerfect = nrPerfectChannelEstimate(carrier,pathGains, ... pathFilters,offset,sampleTimes); %% % To perform practical channel estimation, use the % <docid:5g_ref#mw_function_nrChannelEstimate nrChannelEstimate> function. [estChannelGrid,～] = nrChannelEstimate(carrier,rxGrid,dmrsIndic...
If gNB assigns resources over full bandwidth region for a UE then there is no choice left for UE to select specific frequency region Hence SRS is optional. BUT DMRS will always be transmitted with PUSCH/PUCCH for coherent demodulation and channel estimation. Difference Between Sounding Reference Si...
Maximum 12 orthogonal DL DMRS ports are supported for MU-MIMO https://www.3gpp.org/ftp/Specs/archive/38_series/38.802/ Q: Why is 5G NR using one codeword for multiple layers? ChatGPT: 5G NR (New Radio) uses one codeword for 1-4 layers because it is more efficient in terms of spec...
Those three bits along with the knowledge of which DMRS was used, let the UE determine one of 64 possible SSB indexes. Here, we see a more detailed view of the procedure thus far. DMRS search leads to channel estimation and noise estimation, along with the SSB index or three bits there...
STO的估计主要分为时域估计技术和频域估计技术。 频域STO估计 基于导频的频域STO估计 频域STO估计主要借助于导频信息,也就是DMRS(De-Modulation Reference Symbol)符号。DMRS符号有一个重要的特性就是,每个子载波上的功率为1。 我们知道,在时域上的同步偏差,反映到频域上就是相位旋转,假设发射的导频信号为Xl(k),...
estChannelGridPerfect = nrPerfectChannelEstimate(carrier,pathGains, ... pathFilters,offset,sampleTimes); %% % To perform practical channel estimation, use the % <docid:5g_ref#mw_function_nrChannelEstimate nrChannelEstimate> function. [estChannelGrid,～] = nrChannelEstimate(carrier,rxGrid,dmrsIndic...
5G(NR)中上行探测参考信号 In NR there are two types of Reference Signal in UL which gives information about the channel quality. 5G(NR)网络上行参考信号有两种,用于上报信道质量; DMRS-- Demodulation Reference Signal SRS-- Sounding Reference Signal DMRS—解调参考信号 SRS--探测参考信号 With the help...
5G NR 小区搜索过程详细介绍(包括视频、中文译文和英文原文)转自:5G通信技术 公众号作者进行了整理和翻译,欢迎指正和讨论。文中顺序依次是视频、中文译文和英文原文。 中文:这是我们5G Explained系列的新内容。在此视频中,我们将讨论初始获取过程,包括小区搜索,广播信道和随机访问信道的解码。我们将研究小区搜索以及...