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US 7,986,742 B2Granted
Pilots for MIMO communication system
AssigneeQUALCOMM Incorporated
InventorsJohn W. Ketchum, Mark S. Wallace, J. Rodney Walton, Steven J. Howard
Life of this patent
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AssigneeQUALCOMM Incorporated
InventorsJohn W. Ketchum, Mark S. Wallace, J. Rodney Walton, Steven J. Howard
Estimating the term…
Pilots suitable for use in MIMO systems and capable of supporting various functions are described. The various types of pilot include—a beacon pilot, a MIMO pilot, a steered reference or steered pilot, and a carrier pilot. The beacon pilot is transmitted from all transmit antennas and may be used for timing and frequency acquisition. The MIMO pilot is transmitted from all transmit antennas but is covered with different orthogonal codes assigned to the transmit antennas. The MIMO pilot may be used for channel estimation. The steered reference is transmitted on specific eigenmodes of a MIMO channel and is user terminal specific. The steered reference may be used for channel estimation. The carrier pilot may be transmitted on designated subbands/antennas and may be used for phase tracking of a carrier signal. Various pilot transmission schemes may be devised based on different combinations of these various types of pilot.
In a wireless multiple-input multiple-output (MIMO) communication system utilizing orthogonal frequency division multiplexing (OFDM), a method of generating a MIMO pilot comprised of a plurality of orthogonal pilots suitable for transmission from a plurality of antennas, the method comprising:
A computer-program apparatus for generating a MIMO pilot comprised of a plurality of orthogonal pilots suitable for transmission from a plurality of antennas comprising a memory having one or more software modules stored thereon, the one or more software modules being executable by one or more processors and the one or more software modules comprising:
Dependencies are inferred from the claim text.