Patent ID: 8767665
Filing Date: 2014-07-01
Classification: H04B,H04L

Abstract:
1. A method implemented in a base station used in a wireless communications system, the method comprising: transmitting an index indicating data stream parameters in which a combination of a number of streams and an allocated pilot stream index is included; and transmitting an indication of a number of transmit antennas at the base station, wherein the data stream parameters for 8 transmit antennas are indicated by the index according to a first table in which the data stream parameters further include a modulation constellation of a paired user in a case of 2 stream transmission, wherein the data stream parameters for 4 transmit antennas are indicated by the index according to a second table in which the data stream parameters further include a modulation constellation of a paired user, and wherein the first table comprises and the second table comprises where MU-MIMO stands for multi-user multiple input multiple output, QPSK stands for quadrature phase-shift keying, and QAM stands for quadrature amplitude modulation.