Channel state information CSI measurement and feedback method and apparatus

A receive end, comprising:

• a receiver, configured to receive channel state information (CSI) process configuration information comprising information of at least one CSI process, and wherein a first CSI process in the at least one CSI process is associated with K reference signal resources and M interference measurement resources;
• a processor, configured to:
• for the first CSI process, obtain a target reference signal resource based on the K reference signal resources, obtain a target interference measurement resource based on the M interference measurement resources, and obtain CSI based on the target reference signal resource and the target interference measurement resource;
• and
• a transmitter, configured to send the CSI, wherein the CSI comprises a target index for representing the target reference signal resource and the target interference measurement resource, wherein the target index comprises a joint index generated based on an index of the target reference signal resource and an index of the target interference measurement resource,
• wherein for a first reference signal resource in the K reference signal resources, K is related to at least one of a length of an orthogonal spreading code used for the first reference signal resource or a spreading manner of the first reference signal resource.