Lei Cheng, Chen Hongwei, Chen Minghua, Xie Shizhong
State Key Laboratory on Integrated Optoelectronics Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China.
Opt Express. 2010 Dec 6;18(25):26149-54. doi: 10.1364/OE.18.026149.
By multiplexing two OFDM signals with the same channel space and bit rate together in an interleaved mode, a novel optical multiplexing scheme is proposed and experimentally demonstrated. Since the channel space is halved, the spectral efficiency is doubled compared with conventional OFDM. It is proved that the orthogonality between the subcarriers is maintained as long as the data is real. With discrete Fourier transform, the proposed scheme has similar computational complexity as conventional OFDM and single sideband modulation is conveniently achieved. A 10 Gb/s transmission system is set up, and proves the feasibility and efficiency of the scheme experimentally.
通过以交织模式将具有相同信道间隔和比特率的两个正交频分复用（OFDM）信号复用在一起，提出并通过实验验证了一种新型光复用方案。由于信道间隔减半，与传统OFDM相比，频谱效率提高了一倍。结果表明，只要数据是实值的，子载波之间的正交性就能得以保持。利用离散傅里叶变换，该方案具有与传统OFDM相似的计算复杂度，并且方便地实现了单边带调制。搭建了一个10 Gb/s传输系统，并通过实验证明了该方案的可行性和有效性。
