Patent ID: 7809074
Filing Date: 2010-10-05
Classification: H04B,H04L,H04W

Abstract:
1. A forward reference signaling method for a multiple input, multiple output (MIMO) space division multiple access (SDMA) system, comprising: receiving at a transmitting device effective channel information from a plurality of receiving devices; generating a plurality of transmit beamforming vectors based on the effective channel information; generating precoded reference signals by using each transmit beamforming vector to encode a reference signal; and feeding forward the precoded reference signals to a plurality of receiving devices for use in generating receive beamforming vectors at each receiving device, where each receiving device extracts the plurality of transmit beamforming vectors from the precoded reference signals and identifies which transmit beamforming vector is designed for said receiving device without requiring additional information to be fed forward that identifies the transmit beamforming vector or precoded reference signal that is designed for said receiving device.