What is CSI RS port?
CSI-RS ports are the number of radiating elements (or group of antennas) of an active antenna unit. So there can be 4×4 MIMO with 8 CSI-RS ports with 16 CSI-RS ports or with 4 CSI-RS ports. Are not related with each other. Only conditions is that MIMO layers cannot be higher than CSI-RS ports.
What is ZP CSI RS?
ZP-CSI-RS is used for DL CSI acquisition and interference measurement. It also masks certain resource elements (REs) to make them unavailable for PDSCH transmission. As the name ZP indicates, nothing is transmitted in those REs.
What is the purpose of CSI RS in 5G?
CSI-RS refers to channel state information reference signal and these signals are downlink only signal. It is used for DL CSI acquisition. 5G NR standard allows high level of flexibility in CSI-RS configurations, a resource can be configured with up to 32 ports.
What is CSI IM in 5G?
5G/NR – CSI RS Home : www.sharetechnote.com. As in LTE CSI, NR CSI (Channel Status Information) is a mechanism that a UE measure various radio channel quality and report the result to Network(gNB). However, from LTE TM9 we stared using a special reference signal for CSI.
What is CSI NR?
As in LTE CSI, NR CSI (Channel Status Information) is a mechanism that a UE measure various radio channel quality and report the result to Network(gNB). However, from LTE TM9 we stared using a special reference signal for CSI.
What is 5g codebook?
Putting it other way, Codebook is a kind of matrix (a matrix having complex value elements) that transform the data bit (PDSCH) to another set of data that maps to each antenna port.
What is Pdcch order?
PDCCH Order is a mechanism by which eNB force UE to initiate PRACH. As you know, one of the most important purpose of RACH is to let UE obtain the synchronization with network and establish the iniitial connection pipe. In most case, the decision to initiate (trigger) PRACH is done by UE side.
What is LTE Phich?
PHICH is a control channel on LTE downlink, that is used to indicate the reception of PUSCH transmission from a mobile/UE. The PHICH indicates either a ACK or a NACK, which the UE will decode to find out if it has to do a retransmission or not.
Where does CSI-Rs resource start in OFDM?
CSI-RS resource may start at any OFDM symbol of the slot and it usually occupies 1/2/4 OFDM symbols depending upon configured number of ports. For time/frequency tracking, CSI-RS can either be periodic or aperiodic.
Why does UE need CSI-Rs to calculate CSI?
In this case, the UE needs the CSI-RS to calculate the CSI and report it back in the UL direction. CSI-RS refers to channel state information reference signal and these signals are downlink only signal. It is used for DL CSI acquisition.
How many ports can CSI-Rs be configured with?
CSI-RS is configured specific to UE, but multiple users can also share the same resource 5G NR standard allows high level of flexibility in CSI-RS configurations, a resource can be configured with up to 32 ports.
Why is 5G NR used for CSI acquisition?
It is used for DL CSI acquisition. 5G NR standard allows high level of flexibility in CSI-RS configurations, a resource can be configured with up to 32 ports. CSI-RS resource may start at any OFDM symbol of the slot and it usually occupies 1/2/4 OFDM symbols depending upon configured number of ports.