PILOT TRANSMISSION AND CHANNEL ESTIMATION FOR MISO AND MIMO SYSTEMS

摘要

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.