Channel state information calculation

An apparatus comprising:

• a receiver that receives information indicating at least one channel state information reference signal resource for channel measurement transmitted from a first transmission resource and at least one non-zero-power channel state information reference signal resource for interference measurement transmitted from a second transmission resource;
• a processor that:
• determines a channel state information reference signal resource of the at least one channel state information reference signal resource and a non-zero-power channel state information reference signal resource of the at least one non-zero-power channel state information reference signal resource for calculating channel state information;
• and
• calculates the channel state information based on the channel state information reference signal resource and the non-zero-power channel state information reference signal resource, wherein the channel state information reference signal resource and the non-zero-power channel state information reference signal resource are received using a receiving spatial filter;
• and
• a transmitter that transmits the channel state information.

A method comprising:

• transmitting information indicating at least one channel state information reference signal resource for channel measurement transmitted from a first transmission resource and at least one non-zero-power channel state information reference signal resource for interference measurement transmitted from a second transmission resource;
• transmitting quasi-colocation information corresponding to the first transmission resource;
• and
• receiving channel state information calculated based on a channel state information reference signal resource of the at least one channel state information reference signal resource and a non-zero-power channel state information reference signal resource of the at least one non-zero-power channel state information reference signal resource.