Real-Time 10.4-Gb/s Single-Band Optical 256/64/16QAM Receiver for OFDM-PON
Real-Time 10.4-Gb/s Single-Band Optical 256/64/16QAM Receiver for OFDM-PON
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DOI：
10.1109/lpt.2014.2344175
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发表时间：
2014-07
影响因子：
2.6
通讯作者：
Ming Chen;Jing He;Jin Tang;Xian-sheng Wu;Lin Chen
中科院分区：
文献类型：
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作者：
Ming Chen;Jing He;Jin Tang;Xian-sheng Wu;Lin Chen
本文介绍了一种采用256/64/16正交幅度调制（QAM）自适应调制格式的10.4Gb/s实时基带正交频分复用（OFDM）接收机，该接收机具有符号同步、信道均衡、以及采样时钟频率同步，成功地实现了使用商业现场可编程门阵列芯片和采样率5GS/s模数转换器在强度调制直接检波光通信系统中，对实时基带OFDM接收机的性能进行了实验研究。离线产生的10.4 Gb/s自适应调制256/64/16 QAM编码光OFDM信号具有4.84 bit/s/Hz的高频谱效率，可在20 km标准单模光纤上成功传输，误码率<3.8 × 10-3。此外，在接收机中实时测量帧丢失概率，以获得用于符号同步的最佳阈值。
In this letter, a 10.4-Gb/s real-time baseband orthogonal frequency division multiplexing (OFDM) receiver utilizing 256/64/16-quadrature amplitude modulation (QAM) adaptive modulation format, incorporating several key functionalities, including symbol synchronization, channel equalization, as well as sampling clock frequency synchronization is successfully implemented using a commercial field programmable gate array chip and a sample rate of 5-GS/s analog-to-digital converter. The performance of the real-time baseband OFDM receiver is experimentally investigated in an intensity-modulation and direct-detection optical communication system. The offline generated 10.4-Gb/s adaptively modulated 256/64/16QAM encoded optical OFDM signal with a high spectral efficiency of 4.84 bit/s/Hz can be successful transmitted over 20-km standard single mode fiber with a bit error rate <;3.8 × 10-3. In addition, the frame miss probability is real-time measured in the receiver to obtain an optimal threshold value for the symbol synchronization.