SYSTEM FOR WAVELENGTH DIVISION MULTIPLEXED-PASSIVE OPTICAL NETWORK, AND ITS SIGNAL PROCESSING METHOD

摘要

A passive optical network system of a wavelength division multiplexing method and a method for processing its signal are provided to drastically increase the transmission speed of the upward signal and the system power margin by installing the encoder and the decoder, respectively. A passive optical network system of a wavelength division multiplexing method includes an optical network device(240) to transmit and receive the upward signal and the downward signal. The optical network device(240) is connected to the central base station through the network. The optical network device(240) is provided with an encoder(244) and a modulator(243). The encoder(244) performs the encoding by adding the extra codes for correcting the error to the electrical upward signal. And, the modulator(243) modulates the upward signal encoded from the encoder(244) to the downward transmitted light from the central base station.