Zhou Ji, Qiao Yaojun
Opt Lett. 2015 Sep 1;40(17):4034-7. doi: 10.1364/OL.40.004034.
In this Letter, we propose a discrete Hartley transform (DHT)-spread asymmetrically clipped optical orthogonal frequency-division multiplexing (DHT-S-ACO-OFDM) uplink transmission scheme in which the multiplexing/demultiplexing process also uses the DHT algorithm. By designing a simple encoding structure, the computational complexity of the transmitter can be reduced from O(Nlog(2)(N)) to O(N). At the probability of 10(-3), the peak-to-average power ratio (PAPR) of 2-ary pulse amplitude modulation (2-PAM)-modulated DHT-S-ACO-OFDM is approximately 9.7 dB lower than that of 2-PAM-modulated conventional ACO-OFDM. To verify the feasibility of the proposed scheme, a 4-Gbit/s DHT-S-ACO-OFDM uplink transmission scheme with a 1∶64 way split has been experimentally implemented using 100-km standard single-mode fiber (SSMF) for a long-reach passive optical network (LR-PON).
在本信函中，我们提出了一种离散哈特利变换（DHT）扩频非对称限幅光正交频分复用（DHT-S-ACO-OFDM）上行链路传输方案，其中复用/解复用过程也采用DHT算法。通过设计一种简单的编码结构，发射机的计算复杂度可从O(Nlog(2)(N))降至O(N)。在概率为10(-3)时，二进脉冲幅度调制（2-PAM）调制的DHT-S-ACO-OFDM的峰均功率比（PAPR）比2-PAM调制的传统ACO-OFDM约低9.7 dB。为验证所提方案的可行性，已使用100公里标准单模光纤（SSMF）针对长距离无源光网络（LR-PON）通过实验实现了一种具有1∶64路分光的4 Gbit/s DHT-S-ACO-OFDM上行链路传输方案。
