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Adaptive Power Loading for Multiple-Input Multiple-Output OFDM Systems With Perfect Channel State Information

Overview This paper derives a power loading procedure optimizing the bit-error rates of multiple-input multiple-output (MIMO) bit-interleaved coded modulation OFDM systems performing hard-decisions after demodulation and ideal interleaving. The adaptive subchannel power allocation is based on perfect channel state information at the transmitter and singular value decomposition. Monte Carlo simulations show that the relative SNR gain from the adaptation is up to 3 dB at an average bit-error rate level of 10-6. The relative gain in MIMO systems decreases for increasing number of antennas and is about 2.5 dB for a (2×2)-MIMO systems.

Further White Paper Details
Publisher	ETH Zurich	File Format	PDF
Date Published	March 2005	Downloads	166
Format	White Papers
Topics	Wireless LAN

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