Methods and arrangements for channel estimation

A wireless device for performing channel estimation, the device comprising radio circuitry and processing circuitry, the processing circuitry further comprising a channel analyser and a channel estimator, wherein:

• the processing circuitry is configured to obtain an indication that a set of antenna ports, or antenna port types, share at least one channel property;
• the channel analyzer is configured to estimate one or more of the shared channel properties based at least on a first reference signal transmitted from a first antenna port included in the set, or having a type corresponding to one of the types in the set, wherein the first reference signal is received via the radio circuitry;
• and
• the channel estimator is configured to perform the channel estimation based on a second reference signal transmitted from a second antenna port included in the set, or having a type corresponding to one of the types in the set,
• wherein the channel estimation based on the second reference signal is performed using at least the estimated one or more channel properties, and
• wherein the second reference signal is received via the radio circuitry.