name: CSI
full_form: Channel State Indicator
context: is not configured, or is configured to CDM2. Resource elements used for transmission of CSI reference signals on any of the antenna ports in the set , where - , or for CSI reference signals on 12 ports, or - , , or for CSI reference signals on 16 ports, or - , , , or for CSI reference signals on 20 ports, or - , , , , or for CSI reference signals on 24 ports, or - , , , ,, or for CSI reference signals on 28 ports, or - , , , , , , or for CSI reference signals on 32 ports shall not be used for transmission of PDSCH on any antenna port in the same slot if higher layer parameter CDMType is configured to CDM4. Resource elements used for transmission of CSI reference signals on any of the antenna ports in the set , where - , or for CSI reference signals on 24 ports, or - , , or for CSI reference signals on 32 ports shall not be used for transmission of PDSCH on any antenna port in the same slot if higher layer parameter CDMType is configured to CDM8. The mapping for CSI reference signal
description: The Channel State Indicator (CSI) is a mechanism in wireless communication systems (LTE and 5G) that provides information about channel conditions from user equipment (UE) to the base station. CSI reference signals are transmitted on specific resource elements, enabling the UE to estimate the channel state and report it back. This data is vital for link adaptation, beamforming, and advanced transmission techniques.
explanation: CSI is classified as a Channel because its primary function is to convey information about the quality and characteristics of the wireless communication channel. The text emphasizes CSI's role in estimating and reporting channel state, directly impacting signal transmission and reception.
section_title: 6.10.5.2	Mapping to resource elements
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