Adaptive denoising and equalization of infrared wireless CDMA system
EURASIP Journal on Wireless Communications and Networking - Special issue on optical wireless communications
Transmitter and receiver methods for improving asymmetrically-clipped optical OFDM
IEEE Transactions on Wireless Communications
Diversity combining for asymmetrically clipped optical OFDM in IM/DD channels
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Performance evaluation of optical OFDM systems with nonlinear clipping distortion
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Wireless optical OFDM implementation for aircraft cabin communication links
ISWPC'10 Proceedings of the 5th IEEE international conference on Wireless pervasive computing
Novel techniques of single-carrier frequency-domain equalization for optical wireless communications
EURASIP Journal on Advances in Signal Processing - Special issue on advances in single carrier block modulation with frequency domain processing
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We examine multiple-subcarrier modulation (MSM) schemes for wireless infrared digital communication in the indoor environment. Intensity modulation with direct detection (IM/DD) is employed, which results in equivalent baseband channels with a nonnegativity constraint on the input. The power efficiencies of modulation schemes are compared at 30 Mb/s and 100 Mb/s over an ensemble of experimentally determined multipath channels. Carrier selection and power shaping are examined as methods for improving MSM performance. It is found that MSM schemes can allow operation at higher data rates than single-carrier modulation schemes without equalization. Moreover, MSM schemes can be more bandwidth-efficient and also can provide a simple and flexible method for multiple access to the channel. However, they are not as power efficient as single-carrier schemes, and this will limit their use to applications which are not power limited