Title :
A comparative performance study of optical subsystem equalization in OFDM-based and OWDM-based Radio-over-Fiber systems
Author :
Baghersalimi, Gholamreza
Author_Institution :
Dept. of Electr. Eng., Univ. of Guilan, Rasht, Iran
Abstract :
In this paper the impact of a Radio-over-Fiber (RoF) optical subsystem on the performance of Orthogonal Frequency Division Multiplexing (OFDM) using Discrete Fourier Transform (DFT) and Discrete Wavelet Transform (DWT) is evaluated. The study investigates the use of pilot-aided channel estimation to equalize the optical subsystem nonlinearities in the presence of AWGN. The results show that there are some DWT-based OFDM schemes whose system Bit Error Rate (BER) outperform that of the DFT-based OFDM for different modulation schemes. Specially, Haar wavelet achieves the best BER performance. Also, DWT-OFDM achieves more efficiently than DFT-OFDM in nonlinear systems.
Keywords :
AWGN; Haar transforms; OFDM modulation; channel estimation; discrete Fourier transforms; discrete wavelet transforms; error statistics; nonlinear systems; radio-over-fibre; AWGN; BER performance; DFT; DWT; Haar wavelet; OFDM-based radio-over-fiber optical subsystem; OWDM-based radio-over-fiber optical subsystem; RoF optical subsystem; bit error rate performance; comparative performance study; discrete fourier transform; discrete wavelet transform; modulation scheme; nonlinear system; optical subsystem equalization; orthogonal frequency division multiplexing; orthogonal wavelet division multiplexing; pilot-aided channel estimation; Bit error rate; Discrete wavelet transforms; Modulation; Nonlinear optics; OFDM; Optical fibers; AWGN; Channel Equalization; Haar; OFDM; OWDM; RoF;
Conference_Titel :
Telecommunications (ConTEL), Proceedings of the 2011 11th International Conference on
Conference_Location :
Graz
Print_ISBN :
978-1-61284-169-4
Electronic_ISBN :
978-3-85125-161-6
