A radio network node, a wireless device and methods therein for reference signal configuration

Abstract

A Radio Network Node (RNN) 210 and a method therein for configuration of Demodulation Reference Signals (DMRSs) of a wireless device 208. The RNN 210 and the wireless device 208 are operating in a wireless communications network 200. The RNN indicates a DMRS configuration to the wireless device, which DMRS configuration is dynamically configurable to relate to one or more out of a first OrthogonalFrequency- Division Multiplexing (OFDM) symbol comprising DMRSs for a first transmission; and a second OFDM symbol comprising DMRSs for the first transmission.

Description

technical field [0001] Embodiments herein relate generally to a radio network node (RNN), a wireless device and methods therein. In particular, embodiments relate to reference signal (RS) configurations, in particular high speed demodulation reference signal (DMRS) configurations. Background technique [0002] A communication device such as a terminal is also referred to as eg user equipment (UE), mobile terminal, station (STA), wireless device, wireless terminal and / or mobile station. A communication device is capable of communicating wirelessly in a wireless communication system such as a wireless local area network (WLAN) or a cellular communication network (also sometimes referred to as a cellular radio system or cellular network). Communication may be performed eg between two communication devices, between a communication device and a conventional telephone and / or between a communication device and a server, eg via an access network and possibly one or more core networ...

AI Technical Summary

Problems solved by technology

However, two or more DMRSs located in the same OFDM symbol but placed on different frequency locations (e.g., on different subcarriers) only enable time error estimation

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