Abstract:
An Orthogonal Frequency Division Multiplexing (OFDM) over fiber based Passive Optical Network (PON) is proposed to cater high data rates to densely populated users in an organization such as a university campus. Performance of a single-carrier fiber-optic bidirectional transmission link carrying Quadrature Amplitude Modulated (16/64-QAM) symbols on OFDM carriers is investigated and demonstrated through simulation. The bidirectional link is based on coherent detection and is designed for carrying 10 Gbps QAM-OFDM signals over a 5-km standard Single Mode Fiber (SMF) between a central office and 32 wireless Access Points (APs). Same optical carrier is utilized for downstream and upstream transmission assuming that a dynamic bandwidth allocation scheme is applied through an ad-hoc network constituted among wireless APs at the distribution end of the network. Bit-error-rates (BERs) of order of 10−3 to 10−5 are achieved when performance of the OFDM-over-fiber is analyzed for electrical signals at wireless APs.