Patent ID: 8913529
Filing Date: 2014-12-16
Classification: H04B,H04L,H04W

Abstract:
1. A method of transmitting and receiving pilots in a wireless multiple-input multiple-output (MIMO) communication system, comprising: transmitting a MIMO pilot on a forward channel from a plurality of antennas and on a first communication link via a plurality of transmission channels, wherein the MIMO pilot comprises a plurality of pilot transmissions sent from the plurality of antennas, and wherein the pilot transmission from each antenna is configured to be identifiable by a communicating entity receiving the MIMO pilot; and receiving a steered pilot on a reverse channel via at least four eigenmodes of a second communication link from the communicating entity, wherein the at least four eigenmodes may be used for data transmission, and the steered pilot is generated based on the MIMO pilot and a channel response matrix for the plurality of transmission channels, wherein the steered pilot comprises a specific set of modulation symbols that is subjected to spatial processing prior to transmission, wherein the MIMO communication system supports a single-input multiple-output (SIMO) transmission mode, a diversity transmission mode, a beam-steering transmission mode, a beam-forming transmission mode, a non-steered spatial multiplexing transmission mode, a multi-user spatial multiplexing transmission mode, and a spatial multiplexing transmission mode.