Methods and arrangements for channel estimation

A UE for performing channel estimation, the UE comprising radio circuitry and processing circuitry, wherein:

• the radio circuitry is configured to:
• receive an indication of a set of two or more antenna ports which share at least one channel property;
• receive a first reference signal transmitted from a first antenna port included in the set;
• and
• receive a second reference signal transmitted from a second antenna port included in the set,
• wherein a channel estimation for the second reference signal is performed using one or more channel property, from the at least one shared channel property, estimated based on the first reference signal.

A non-transitory computer-readable medium storing instructions which when executed by processor circuitry of a wireless device cause the wireless device to:

• receive an indication of a set of two or more antenna ports which share at least one channel property;
• estimate one or more of the shared channel property or properties based at least on a first reference signal received from a first antenna port included in the set and
• perform channel estimation based on a second reference signal received from a second antenna port included in the set,
• wherein the channel estimation based on the second reference signal is performed using at least the estimated one or more of the shared channel property or properties.