Patent ID: 9698954
Date: 2017-07-04
CPC Classifications: H04B,H04J,H04L

Claim:
1. A method for multiplexing demodulation reference signals (DM-RS) in multiple-input multiple-output (MIMO) communications, comprising: receiving a cyclic shift (CS) index for transmitting a DM-RS over at least one layer of a plurality of layers; determining a CS value and an orthogonal cover code (OCC) for transmitting the DM-RS based at least in part on the CS index, wherein the determining the CS value is based at least in part on a pre-defined rule corresponding to the CS index and an index for each layer of the plurality of layers, and wherein the determining the OCC includes determining a same OCC for at least two of the DM-RSs over at least two layers of the plurality of layers; and transmitting the DM-RS according to the CS value and the OCC.