Jin X Q, Giddings R P, Tang J M
School of Electronic Engineering, Bangor University, Dean Street, Bangor, LL57 1UT, UK.
Opt Express. 2009 Aug 17;17(17):14574-85. doi: 10.1364/oe.17.014574.
Real-time optical orthogonal frequency division multiplexing (OOFDM) transceivers are experimentally demonstrated with advanced pilot subcarrier-assisted channel estimation being implemented. The channel estimation technique is, for the first time, proposed and experimentally verified rigorously, which offers a number of unique features including high accuracy, low complexity, small pilot bandwidth usage, excellent stability and buffer-free data flow. The fastest ever real-time end-to-end transmission of 3 Gb/s 16-QAM-encoded OOFDM signals over 75 km MetroCor single-mode fibres is achieved with negative power penalties of -2dB at BERs of 1.0 x 10(-4) in directly modulated DFB laser-based, intensity-modulation and direct-detection systems without in-line optical amplification and chromatic dispersion compensation.
实时光正交频分复用（OOFDM）收发器通过实施先进的导频子载波辅助信道估计进行了实验演示。该信道估计技术首次被提出并经过严格的实验验证，具有许多独特的特性，包括高精度、低复杂度、小导频带宽占用、出色的稳定性和无缓冲数据流。在基于直接调制DFB激光器的强度调制和直接检测系统中，在没有在线光放大和色散补偿的情况下，实现了有史以来最快的3 Gb/s 16-QAM编码OOFDM信号在75 km MetroCor单模光纤上的实时端到端传输，在误码率为1.0 x 10(-4)时功率代价为-2dB。
