Wireless LAN White Papers
Linear Precoding for Multiuser MIMO-OFDM Systems
Overview This paper develops linear precoding schemes for the downlink in multiuser Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems with multiple data streams per user. The authors extend an existing multiuser MIMO algorithm, that jointly optimizes the power allocation and the transmit and receive filters, to MIMOOFDM systems. One extension is to solve the resulting problem of joint power allocation across OFDM subcarriers. This paper also presents efficient methods to reduce the computational load of the algorithm by interpolating the precoding and decoding matrices corresponding to different OFDM subcarriers. The simulations show that the proposed interpolation scheme outperforms previously known schemes, but requires that the precoder for each subcarrier be tailored to the interpolated receiver.
| Publisher | University of Toronto | File Format | |
|---|---|---|---|
| Date Published | September 2006 | ||
| Format | White Papers | ||
| Topics | |||
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