Wireless LAN White Papers
Recursive and Trellis-Based Feedback Reduction for MIMO-OFDM With Rate-Limited Feedback
Overview This paper investigates an adaptive MIMO-OFDM system with a feedback link that can only convey a finite number of bits. This paper considers three different transmitter configurations; beamforming applied per OFDM subcarrier; precoded spatial multiplexing applied per subcarrier; and precoded orthogonal space time block coding applied per subcarrier. Depending on the channel realization, the receiver selects the optimal beamforming vector or precoding matrix from a finite-size codebook on each subcarrier, and informs the transmitter through finite-rate feedback. Exploiting the fact that the channel responses across OFDM subcarriers are correlated, it proposes two methods to reduce the amount of feedback.
| Publisher | Institute of Electrical and Electronics Engineers | File Format | |
|---|---|---|---|
| Date Published | March 2006 | ||
| Format | White Papers | ||
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