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Enhanced Bit-Loading Techniques for Adaptive MIMO Bit-Interleaved Coded OFDM Systems  

Cho, Jung-Ho (ADD)
Sung, Chang-Kyung (CSIRO ICT Centre)
Moon, Sung-Hyun (Korea Univ.)
Lee, In-Kyu (Korea Univ.)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.46, no.2, 2009 , pp. 18-26 More about this Journal
Abstract
When channel state information (CSI) is available at the transmitter, the system throughput can be enhanced by adaptive transmissions and opportunistic multiuser scheduling. In this paper, we consider multiple-input multiple-output (MIMO) systems employing bit-interleaved coded orthogonal frequency division multiplexing (BIC-OFDM). We first propose a bit-loading algorithm based on the Levin-Campello algorithm for the BIC-OFDM. Then we will apply this algorithm to the MIMO system with a finite set of constellations, by reassigning residual power on each stream Simulation results show that proposed bit-loading scheme which takes the residual power into account improves the system performance especially at high signal-to-noise ratio (SNR) range.
Keywords
bit-interleaved coded modulation (BICM); orthogonal frequency division multiplexing (OFDM); multiple-input multiple-output (MIMO);
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