A beam codebook of 5G millimeter wave (mmWave) for data communication consists of multiple high-peak-gain beams to compensate the high pathloss at the mmWave bands.
What is codebook based beamforming?
— Codebook based beamforming. — The radio node transmits reference signals and the User Equipment (UE) performs channel estimations in. order to requests specific beam directions to the radio node, the UE can select among a list of 3GPP. predefined beam directions (Precoding codebook)
What is PMI in 5G?
PMI stands for Pre-coding Matrix Indicator. And RI is Rank Indicator. These three values are computed on the fly in LTE/5G NR systems and used to try to optimize resource allocation among the various user end devices (UEs) that are requesting service.
What is SRS 5G?
SRS is a UL reference signal which is transmitted by UE to Base station. SRS gives information about the combined effect of multipath fading, scattering, Doppler and power loss of transmitted signal. … DMRS provides information about the frequency region which is being used by PUSCH/PUCCH specifically.
What is transmission mode in LTE?
There are 8 transmission modes defined in 3GPP release 9 for LTE downlink , (1) single transmit antenna, (2) transmission diversity, (3) open loop spatial multiplexing with cyclic delay diversity (CDD), (4) closed loop spatial multiplexing, (5) multiuser MIMO, (6) closed loop spatial multiplexing using a single …
What is LTE Pucch?
In LTE, data can be transmitted from the eNodeB to the UE via a physical downlink shared channel (PDSCH). A physical uplink control channel (PUCCH) can be used to acknowledge that data was received.
What is beam sweeping?
Beam Sweeping is a technique to transmit the beams in all predefined directions in a burst in a regular interval. For example, the first step in mobile terminal attach procedure is Initial Access, which is to synchronize with system and receive the minimum system information broadcast.
What is precoding matrix indicator in LTE?
Precoding matrix indicator (PMI)
The precoding matrix determines how the individual data streams (called layers in LTE) are mapped to the antennas. They are applicable to closed loop transmission modes. • Transmission Mode-4:Closed Loop Spatial Multiplexing.