5G NR - 下行同步(DL Synchronization)学习笔记4 - PSS/SSS检测和/PBCH解码
PSS/SSS检测:
PBCH DMRS检测:
PBCH DRMS是PBCH的解调参考信号，通过对PBCH DMRS序列检测并对其进行信道/噪声估计, 解调PBCH，获取MIB, 完成帧同步/半帧同步/时隙同步以及获取另外一些重要信息(Kssb, ssb index, 对应于承载SIB1的PDSCH的PDCCH配置信息(coreset, search space)…)
DMRS序列生成过程:
UE 通过盲解码的方式，UE 可以确定iSSB的全部或者部分信息。对于 Lmax = 4，本步骤完成后，可以得到完整的iSSB (2 bit）信息和半帧信息，实现了半帧同步，同时确定了无线帧的起始位置，但是不能确定系统帧号（SFN）；对于Lmax = 8，本步骤完成后，可以得到完整的iSSB (3 bit）信息，实现了半帧同步，但是不能确定是无线帧的第1个半帧还是第 2 个半帧，也不能确定系统帧号；对于Lmax = 64，可以得到iSSB的 3 个最低 bit 位，半帧同步、无线帧的起始位置和系统帧号都不能确定。
SSB第一个OFDM符号的确定:
MIB消息：
Reference：
38.104 - Base Station (BS) radio transmission and reception
38.300 - NR and NG-RAN Overall Description
38.211 - Physical channels and modulation
38.212 - Multiplexing and channel coding
38.213 - Physical layer procedures for control
38.214 - Physical layer procedures for data
38.331 - Radio Resource Control (RRC) protocol specification
<5G NR Radio Interface>(Balazs Bertenyi, Satoshi Nagata, Havish Kooropaty, Xutao Zhou, Wanshi Chen, Younsun Kim, Xizeng Dai and Xiaodong Xu)
<5G Air Interface – Part II LTE and NR Physical layer>
<Understanding the 5G NR Physical Layer>(Keysight)
< NR Physical Layer Specification in 5G >
< RWS-180007_3GPP NR Physical Layer Structure IMT2020 >(Havish Koorapaty - 3GPP TSG RAN WG1 vice-chairman (Ericsson))
<5G_NR_France_June2019_-_Fundamentals_procedures_TM_aspects_RS_France_June2019>(R&S)
<RWS-180010_Intel_NR_Radio_Interface_Protocol>
<5G无线系统设计与国际标准> (刘晓峰/孙韶辉/杜忠达/沈祖康/徐晓东/宋兴华)
<A Tutorial on Beam Management for 3GPP NR at mmWave Frequencies>
<5G NR_optimizing RAN design architecture to support new standards>(AT&T)
<5G NR The Next Generation Wireless Access Technology>(Erik Dahlman Stefan Parkvall Johan Sko¨ld )
< Synchronization Procedure in 5G NR Systems >
http://sharetechnote.com/(Jaeku Ryu)
https://www.rfwireless-world.com/Terminology/4G-vs-5G-difference-between-4G-and-5G.html
http://www.techplayon.com/nr-secondary-synchronization-signal-sss/
https://moniem-tech.com/2020/11/22/5g-nr-synchronization-signal-block-ssb/
https://www.lifeee.top/posts/18457.html
https://www.linkedin.com/pulse/resourceprbs-allocation-types-lte-5g-nr-naveen-chelikani/