FREQUENCY DOMAIN EQUALIZATION WITH TRANSMIT PRECODING FOR HIGH SPEED DATA TRANSMISSION
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United States of America Patent
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Issued Date -
May 14, 2009
app pub date -
Nov 14, 2007
filing date -
Nov 14, 2007
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Abandoned
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Abstract
Various embodiments of multi input multi output (MIMO) communication systems include a transmit Tomlinson-Harashima Precoding (THP) technique and a single carrier frequency domain equalization (SC-FDE) technique. Parallel THP-FDE and successive THP-FDE are proposed based on the minimum mean square error (MMSE) criterion. For the successive THP-FDE technique, where all transmit streams are subsequently precoded, both suboptimal and optimal MMSE ordering algorithm are set forth. Since the feedback processing is performed at the transmitter, no error propagation problem exists in the THP-FDE MIMO techniques, yielding significant performance improvements over conventional FDE MIMO techniques. Applying channel prediction and THP compensation techniques can also further enhance performance.
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