PERFORMANCE ANALYSIS OF DUAL-PARALLEL/DUAL-ELECTRODE MACH-ZEHENDER MODULATOR-BASED RADIO-OVER-FIBER SYSTEM AGAINST THIRD-ORDER INTERMODULATION ERRORS

Abstract

The rapid development in wireless networks required by mobile and broadband users in terms of capacity, data rate, bandwidth, cost effectivity, green communications, proper quality of service, and so on create the need of a robust system against nonlinear errors. In view of this, the performance of a dual-parallel/dual-electrode Mach-Zehender modulator-based targeted radio-over-fiber (RoF) system for multitone transmission against severe nonlinear errors (i.e., third-order intermodulation) is analyzed. Two-tone radio frequency signals, operating at 9 GHz and 8 GHz, are used in the proposed system. The analytical analysis is confirmed and validated by simulation results using OptSim software. Further, comparative findings are found by considering a conventional Mach-Zehender modulator-based RoF system. The reduction in the third-order intermodulation errors of 21 dB over a fiber distance of 10 km by the proposed method over a conventional system and the obtained results find the implementation of the proposed method to be a robust wireless network.