Multiplex communications – Communication over free space – Combining or distributing information via frequency channels
Reexamination Certificate
2004-12-22
2011-12-13
Lim, Steven (Department: 2617)
Multiplex communications
Communication over free space
Combining or distributing information via frequency channels
C370S334000, C370S345000
Reexamination Certificate
active
08077691
ABSTRACT:
A transmitter generates multiple composite pilots with a training matrix and a gain matrix. Each composite pilot includes multiple training pilots generated with multiple columns of the training matrix and scaled with multiple gain elements in a column of the gain matrix. The transmitter transmits each composite pilot via multiple transmit antennas. A MISO receiver obtains received symbols for the multiple composite pilots and derives an estimate of a composite MISO channel. For OFDM, the MISO receiver derives an initial impulse response estimate for each composite pilot, filters the initial impulse response estimates for all composite pilots, and derives a frequency response estimate for the composite MISO channel. A MIMO receiver obtains and processes received symbols for the multiple composite pilots based on the training and gain matrices and derives channel estimates for individual SISO channels between the multiple transmit antennas and multiple receive antennas.
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Agrawal Avneesh
Gore Dhananjay Ashok
Kadous Tamer
Kordich Donald C.
Lim Steven
QUALCOMM Incorporated
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