HIGHLY SPECTRUM EFFICIENT OFDM PDM WIRELESS NETWORKS BY USING OPTICALSSB MODULATION/

Optical frequency division multiplexing (OFDM) wireless access network using optical single-sideband modulation is proposed, which allows to deliver different wireless signals from a central station to each bas e station over an optical fiber network, The optical single-sideband ( SSB) OFDM can achieve the highest spectrum efficiency of 0.25 b/s/Hz, A 0.25 b/s/Hz has been experimentally verified by the error-free trans port of two-channel 4.98 Gb/s BPSK signal on 10 GHz wireless carrier w ith the frequency channel interval of 20 GHz at 1550 nm over 50 km-lon g standard single-mode fiber link. Furthermore, it has been also exper imentally confirmed that by introducing the polarization division mult iplexing (PDM), the ultimate spectrum efficiency of 0.5 b/s/Hz can be achieved by the hybrid OFDM/PDM.