Analysis of Performance Assessment of Direct-Detection OFDM Optical Receivers With Imperfect RF Demodulation

作者：Rebola Joao L^*; Cartaxo Adolfo V T

来源：Journal of Optical Communications and Networking, 2014, 6(2): 180-189.

DOI：10.1364/JOCN.6.000180

• Bit error probability
• Direct-detection receiver
• Moment generating function
• Optical communications
• Orthogonal frequency division multiplexing
• Radio-frequency demodulation

An analytical method based on the moment generating MGF) is proposed for assessing the performance of direct-detection (DD) orthogonal frequency division multiplexing (OFDM) optical receivers with radio-frequency (RF) demodulation. The MGF-based method is a generalization of the method previously reported in the literature for DD baseband OFDM optical receivers. The proposed method relies on the analytical derivation of equivalent filters that describe the combined effect of electrical filtering + RF demodulation + FFT operation + the equalizer of the OFDM receiver for the real and imaginary parts of the signal at the equalizer output. The method takes into account imperfections of the RF demodulator, namely, power and phase imbalance between the RF demodulator arms and different electrical filtering on its arms. Numerical results show excellent agreement between the bit error probability estimates provided by the proposed method and estimates obtained from Monte Carlo simulation, in the absence and presence of receiver imperfections.

• 出版日期2014-2-1