Abstract
The fiber-wireless (FiWi) access network is a powerful hybrid architecture of optical backhaul and wireless front-end to support high data rates and throughput with minimal time delay. By using radio over fiber (ROF) technique, the optical fiber is well adapted to propagate multiple wireless services having different carrier frequencies. However, multiple wireless signals which have the same carrier frequency cannot propagate over a single optical fiber on the same wavelength, such as multi-input multi-output (MIMO) signals. A novel optical single-sideband frequency translation technique is designed and simulated to solve this problem. 240Mb/s 802.11n MIMO signals are proposed to transport over FiWi system using the proposed approach at 2.4GHz and 5.0GHz carrier frequencies. The crosstalk between MIMO signals with the same carrier frequency is excluded, since each MIMO signal is carried on a specific optical wavelength. Error vector magnitude (EVM) values of −29.83dB (for 2.4GHz) and −28.41dB (for 5.0GHz) have been achieved for bit error rate (BER) 10−5 in the proposed FiWi system.
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