Impairment compensation in long-reach integrated optical-wireless PON

This paper reports the results of the proof-of-concept developed to demonstrate the centralized full transmission impairment compensation between the central office and the user´s premises in long-reach passive optical networks (LR-PONs). The impairment compensation technique uses the information from a broadband channel sounding performed by only nine extra RF-pilots. The transmission of OFDM-based quadruple-play services (GbE-OFDM, LTE, WiMAX and UWB) along LR-PONs with total reach of 100 km is demonstrated without inline optical dispersion compensation. This reach could not be obtained without the proposed centralized impairment compensation technique due to the distortion of UWB signals. The proposed compensation technique provides an EVM improvement of 5.2 dB in the higher UWB band after 100 km SMF transmission. Bi-directional communication of the OFDM-based bundle is achieved at 100 km.