Novel techniques of single-carrier frequency-domain equalization for optical wireless communications

Authors:
Kodzovi Acolatse;Yeheskel Bar-Ness;Sarah Kate Wilson
Affiliations:
Department of Electrical and Computer Engineering, New Jersey Institute of Technology, Newark, NJ;Department of Electrical and Computer Engineering, New Jersey Institute of Technology, Newark, NJ;Department of Electrical Engineering, Santa Clara University, Santa Clara, CA
Venue:
EURASIP Journal on Advances in Signal Processing - Special issue on advances in single carrier block modulation with frequency domain processing
Year:
2011

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Abstract

We investigate the use of single carrier frequency domain equalization (SCFDE) over a diffuse optical wireless (DOW) communications. Recently orthogonal frequency division multiplexing (OFDM) has been applied to DOW communications. However, due to high peak-to-average power ratio (PAPR), the performance of OFDM can severely be affected by the nonlinear characteristics of light emitting diodes (LED). To avoid a PAPR problem, we present in this paper a modified form of SCFDE for DOW communications. We propose three different ways of using SCFDE with DOW communications and show that they exhibit lower PAPR and provide better bit-error rate (BER) performance in the presence of the LED nonlinearity.