Yang Z Y, Yu S, Chen L Q, Zhou J, Qiao Y J, Gu W Y
Opt Express. 2013 Dec 30;21(26):32441-9. doi: 10.1364/OE.21.032441.
In this paper, we theoretically and experimentally prove that sub-carriers in double-side band fast orthogonal frequency division multiplexing (DSB-FOFDM) are orthogonal over a symbol interval independent of the signal phase and amplitude. Therefore, the commonly utilized DSB-FOFDM is quadrature amplitude modulation (QAM) accommodated; while previously DSB-FOFDM was usually modulated by amplitude shift keying (ASK) or binary phase shift keying (BPSK). In our proof-of-concept experiments, bit error ratio (BER) performance of 10 Gb/s quadrature phase shift keying (QPSK) modulated DSB-FOFDM was equivalent to that of 10 Gb/s QPSK modulated OFDM after 500 km standard single mode fiber (SSMF) transmission. 10 Gb/s QPSK modulated DSB-FOFDM largely outperformed the commonly utilized 4-ASK modulated DSB-FOFDM in BER performance. Additionally, BER performance of 10 Gb/s 16-QAM modulated DSB-FOFDM was equivalent to that of 10 Gb/s 16-QAM modulated OFDM after 500 km SSMF transmission.
在本文中，我们从理论和实验上证明，双边带快速正交频分复用（DSB - FOFDM）中的子载波在一个符号间隔内是正交的，与信号相位和幅度无关。因此，常用的DSB - FOFDM采用正交幅度调制（QAM）；而之前DSB - FOFDM通常采用幅移键控（ASK）或二进制相移键控（BPSK）进行调制。在我们的概念验证实验中，10 Gb/s正交相移键控（QPSK）调制的DSB - FOFDM在500 km标准单模光纤（SSMF）传输后的误码率（BER）性能与10 Gb/s QPSK调制的OFDM相当。10 Gb/s QPSK调制的DSB - FOFDM在BER性能上大大优于常用的4 - ASK调制的DSB - FOFDM。此外，10 Gb/s 16 - QAM调制的DSB - FOFDM在500 km SSMF传输后的BER性能与10 Gb/s 16 - QAM调制的OFDM相当。
