Christopher & Weisberg, P.A.
Method and apparatus for phase tracking-reference signal (PT-RS) port selection in downlink
Methods and apparatuses are disclosed for PT-RS selection. In one embodiment, a wireless device is configured to determine a layer based at least on a precoder associated with a precoder matrix indicator, PMI; and transmit an indication of the determined layer to a network node as part of channel state information, CSI, feedback. In other embodiments, a network device is configured to receive an indication of a layer for a phase-tracking reference signal, PT-RS, transmission as part of channel state information, CSI, feedback; determine a precoder based at least on the indication of the layer for the PT-RS transmission; and transmit the PT-RS, the PT-RS transmission associated with the indicated layer and a PT-RS port.
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
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Karl Lars Mattias Vicent
Werner Lindbom Frenne Molés Cases