Wireless LAN White Papers
Interpolation-Based Multi-Mode Precoding for MIMO-OFDM Systems
Overview Spatial multiplexing with multi-mode precoding provides a means to achieve both high capacity and high reliability in Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems. Multi-mode precoding uses linear transmit precoding that adapts the number of spatial multiplexing data streams or modes, according to the transmit Channel State Information (CSI). To do so, it typically requires complete knowledge of the transmit precoding matrices for each subcarrier at the transmitter. This paper proposes to reduce the transmit CSI requirements to only the precoding matrices on a fraction of the subcarriers. The paper uses interpolation to recover the missing precoders followed by mode selection to enforce the optimal spatial multiplexing mode on all subcarriers.
| Publisher | University of Texas | File Format | |
|---|---|---|---|
| Date Published | February 2005 | Downloads | 5 |
| Format | White Papers | ||
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