Patent ID: 9749047
Date: 2017-08-29
CPC Classifications: H04B

Claim:
1. An Orthogonal Frequency Division Multiplexing Access-Passive Optical Network (OFDMA-PON) system for reducing Optical Beat Interference (OBI) comprising: a plurality of optical network units configured to generate an optical signal, wherein each of the plurality optical network units further comprises: a signal generator part configured to generate an electrical signal carrying transmission data, an RF tone generator part configured to generate an RF tone, a combiner part configured to combine the electrical signal and the RF tone to reduce the OBI, and a photoelectric converter part configured to convert a signal of the combined electrical signal and RF tone into the optical signal; and an optical line termination configured to receive optical signals transmitted from the plurality of optical network units, wherein the optical line termination recovers reception data corresponding to the transmission data by combining the optical signals transmitted from the plurality of optical network units, wherein the optical signal in each of the plurality of optical network units comprises a plurality of subcarriers having orthogonal relationship with one another, wherein the RF tone has a high frequency and intensity to reduce the OBI.