UPLINK DEMODULATION REFERENCE SIGNAL DESIGN FOR MIMO TRANSMISSION

摘要

A base station capable of communicating with a plurality of subscriber stations is provided. The base station transmits control information and data to at least one of the plurality of subscriber stations in a subframe using a subset of antenna ports corresponding to a subset of antenna port numbers. The base station maps reference signals corresponding to the subset of antenna ports according to a transmission rank R. The base station indicates, via a cyclic shift indicator (CSI) field in an uplink grant, an assigned resource index corresponding to the mapped reference signal. The CSI field includes a cyclic shift and an orthogonal cover code (OCC) index. The subscriber station uses a resource mapping table to identify the assigned resource index based on the transmission rank, cyclic shift and OCC index.