Allocation Algorithm for Optical OFDM Multimode Fiber Communication System

• Published in: Fiber and integrated optics Vol. 28; no. 2; pp. 146 - 153
• Main Authors: Xie, Wei, Hu, Guijun, Xing, Mingjie, Li, Zhaoxi
• Format: Journal Article
• Language: English
• Published: Philadelphia, PA Taylor & Francis Group 30.03.2009; Taylor & Francis
• Subjects: adaptive modulation; allocation algorithm; AMOOFDM; Applied sciences; Exact sciences and technology; Information, signal and communications theory; Modulation, demodulation; multimode fiber communication; Multiplexing; Optical fiber communications; Optical telecommunications; Signal and communications theory; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Multimode fibers; Frequency modulation; Bit error rate; Optical frequency; Subcarrier; Computational complexity; Adaptive method; Look up table; Bit allocation; Simulation; multimode fiber communication; Telecommunication system; allocation algorithm; Greedy algorithm; Orthogonal frequency division multiplexing; Optical fiber communication; AMOOFDM; Fast algorithm; High frequency; Adaptive modulation
• ISSN: 0146-8030; 1096-4681
• DOI: 10.1080/01468030802276188

A fast bits allocation algorithm is proposed for adaptively modulated optical orthogonal frequency division multiplexing multimode fiber communication system to decrease the system bit error rate caused by some orthogonal frequency division multiplexing subcarriers being located at the deep nulls in the high-frequency region of multimode fiber. Based on a lookup table scheme, the new algorithm dramatically decreases the computational complexity of the Greedy algorithm. The simulation results show that the new algorithm has the same allocation result as the Greedy algorithm, but the computational complexity is considerably lower. In addition, adaptive bits allocation can effectively reduce the system bit error rate.