Analysis of nonlinear effects in subcarrier‐multiplexed fiber‐optic links for CDMA RF signal transmissions

Abstract

In this letter, we propose an analytic model for performance analyses of the optical subcarrier‐multiplexing (SCM) fiber‐optic link for CDMA RF signal transmission in mobile communication networks. We present optimal operational conditions, taking account of the nonlinear effects of the optical transmission link, and the multiple‐access interference produced at the wireless environment. It is shown through BER analyses in this letter that the selection of an optical modulation index (OMI) of the SCM fiber‐optic links can be found optimally to minimize the fiber‐optic noises and intermodulation distortion due to a laser diode (LD). © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 29: 37–40, 2001.

Application of multilayer perceptron networks to laser diode nonlinearity determination for radio‐over‐fibre mobile communications

“…The simplest method for the generation of radio signals for transmission through an optical network is to directly modulate the light source with the received electrical signal. Direct modulation of the laser can lead to a number of problems, such as relative-intensity noise, chirp, and intermodulation distortion [5,6]. Intermodulation distortion has a deep influence on the quality of the received signal, and needs to be known accurately in order to evaluate the performance of the optical system.…”