name: DMRS
full_form: Demodulation Reference Signal
context: Variable/configurable DMRS patterns for data demodulation are supported. At least, one configuration supports front-loaded DMRS pattern. Front-loaded DMRS is mapped over 1 or 2 adjacent OFDM symbols. Additional DMRS can be configured for the later part of the slot. NR aims for performance at least comparable to DM-RS of LTE in scenarios where applicable for both LTE and NR. DMRS configuration can be up to the maximum number of DMRS ports. At least, the 8 orthogonal DL DMRS ports are supported for SU-MIMO and the maximal 12 orthogonal DL DMRS ports are supported for MU-MIMO. At least for CP-OFDM, NR supports a common DMRS structure for DL and UL where the exact DMRS location, DMRS pattern, and scrambling sequence can be the same or different. DMRS for same or different links can be configured to be orthogonal to each other. For DL DMRS port multiplexing, FDM (including comb), CDM (including OCC and Cyclic shift) and TDM are considered. PN sequence is supported for CP-OFDM. DMRS bundling
description: Demodulation Reference Signal (DMRS) is a critical component in the 5G New Radio (NR) technology, specifically designed to facilitate efficient data demodulation. It enables the configuration of variable DMRS patterns, supports front-loaded DMRS, and allows for additional DMRS configurations. The technology aims to provide performance comparable to or better than LTE's DM-RS in applicable scenarios.
explanation: The context describes DMRS as a technical component within the 5G NR framework, focusing on its functionality in data demodulation and performance enhancement. This directly aligns with the definition of 'Technology' as a system, process, or invention related to scientific advancements and practical applications.
section_title: 6.1.6.4.2DMRS
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