Wireless LAN White Papers
Approaching MIMO-OFDM Capacity With Closed-Loop V-BLAST
Overview This paper studies schemes for partial channel feedback in Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) block-fading channels. This paper presents a closed-loop extension of the Vertical Bell Labs Layered Space-Time (V-BLAST) architecture for which the transmit power and rate assignments for each transmit antenna at different OFDM tones are optimized at the receiver and then returned to the transmitter through a low-rate feedback channel. Such optimization minimizes the total transmit power for support of an aggregate transmission rate for each fading block. Antenna and/or tone grouping techniques are also proposed to reduce the amount of feedback.
| Publisher | Institute of Electrical and Electronics Engineers | File Format | |
|---|---|---|---|
| Date Published | February 2007 | ||
| Format | White Papers | ||
| Topics | |||
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