Wireless LAN White Papers
Approaching MIMO-OFDM Capacity With Per-Antenna Power and Rate Feedback
Overview This paper presents power-efficient transmission schemes for the Multiple-Input Multiple-Output Orthogonal Frequency-Division Multiplexing (MIMO-OFDM) block-fading channel under the assumption that the channel is known only perfectly at the receiver, but is unavailable at the transmitter. Based on the well-known Vertical Bell Labs Layered Space-Time (V-BLAST) architecture that employs independent encoding for each transmit antenna ("Horizontal encoding") and successive decoding at the receiver, this paper presents a per-antenna-based power and rate feedback scheme, also known as the "Closed-loop" V-BLAST, for which the receiver jointly optimizes the power and rate assignments for all transmit antennas and then returns them to the transmitter via a low-rate feedback channel. The power and rate optimization minimizes the total transmit power for support the aggregate transmission rate during each fading block.
| Publisher | Institute of Electrical and Electronics Engineers | File Format | |
|---|---|---|---|
| Date Published | February 2007 | ||
| Format | White Papers | ||
| Topics | |||
-
Did you find this white paper useful?
White Paper RSS
Download
Register
