中国激光, 2011, 38 (5): 0505010, 网络出版: 2011-05-09
基于训练序列进行系统优化的60 GHz正交频分复用-光载无线通信系统
Optimization of 60 GHz Orthogonal Frequency Division Multiplexing Radio-over-Fiber System Based on Training Sequence
光通信 光纤无线通信 正交频分复用 训练序列 子载波间互拍干扰 optical communications radio-over-fiber orthogonal frequency division multiplexing training sequence signal-signal beating interference
摘要
分析了60 GHz正交频分复用-光载无线通信(OFDM-RoF)系统中OFDM信号经光纤传输后在光电检测时存在的子载波间互拍干扰(SSBI)现象。提出使用交叉型训练序列结构的OFDM信号来降低SSBI的影响。实验证明，在无色散补偿的情况下，2.5 Gb/s交叉型训练序列结构的基带OFDM信号在58 GHz毫米波系统中经光纤传输20 km后，在误码率为10-3时，其功率代价仅为0.5 dB，而连续型训练序列结构OFDM的功率代价为2 dB。说明基于交叉型训练序列结构的OFDM信号的传输性能在抵抗SSBI方面要明显优于连续型训练序列结构OFDM信号。
Abstract
There is signal-signal beating interference (SSBI) when the orthogonal frequency division multiplexing (OFDM) signal is detected by PIN after transmiting over the fiber in 60 GHz OFDM radio-over-fiber (RoF) system. The interleaved configuration of training sequence of OFDM signal is proposed to decrease the influence of the SSBI. The experimental results show that after the 2.5 Gb/s interleaved OFDM signal transmitting over 20 km single mode fiber in 58 GHz millimeter-wave system, the power penalty of the interleaved OFDM signal is only 0.5 dB at the bit error rate (BER) of 10-3 without dispersion compensation. In comparison, the power penalty of the continued OFDM signal under the same conditions is 2 dB. It is demonstrated that the fiber transmission performance of the interleaved OFDM signal is better than the continued OFDM signal in robust tolerance against SSBI.
邹伟刚, 王鑫, 肖江南, 曹子峥, 陈林, 余建军. 基于训练序列进行系统优化的60 GHz正交频分复用-光载无线通信系统[J]. 中国激光, 2011, 38(5): 0505010. 邹伟刚, 王鑫, 肖江南, 曹子峥, 陈林, 余建军. Optimization of 60 GHz Orthogonal Frequency Division Multiplexing Radio-over-Fiber System Based on Training Sequence[J]. Chinese Journal of Lasers, 2011, 38(5): 0505010.
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