TY - JOUR
T1 - An improved diversity combining receiver for layered ACO-FOFDM in IM/DD systems
AU - Guo, Mengqi
AU - Zhou, Ji
AU - Tang, Xizi
AU - Hu, Fan
AU - Qi, Jia
AU - Qiao, Yaojun
AU - Yang, Aiying
AU - Lu, Yueming
N1 - Publisher Copyright:
© 2017, Springer Science+Business Media, LLC.
PY - 2018/4/1
Y1 - 2018/4/1
N2 - In this paper, an improved receiver based on diversity combining is proposed to improve the bit error rate (BER) performance of layered asymmetrically clipped optical fast orthogonal frequency division multiplexing (ACO-FOFDM) for intensity-modulated and direct-detected (IM/DD) optical transmission systems. Layered ACO-FOFDM can compensate the weakness of traditional ACO-FOFDM in low spectral efficiency, the utilization of discrete cosine transform in FOFDM system instead of fast Fourier transform in OFDM system can reduce the computational complexity without any influence on BER performance. The BER performances of layered ACO-FOFDM system with improved receiver based on diversity combining and DC-offset FOFDM (DCO-FOFDM) system with optimal DC-bias are compared at the same spectral efficiency. Simulation results show that under different optical bit energy to noise power ratios, layered ACO-FOFDM system with improved receiver has 2.86, 5.26 and 5.72 dB BER performance advantages at forward error correction limit over DCO-FOFDM system when the spectral efficiencies are 1, 2 and 3 bits/s/Hz, respectively. Layered ACO-FOFDM system with improved receiver based on diversity combining is suitable for application in the adaptive IM/DD systems with zero DC-bias.
AB - In this paper, an improved receiver based on diversity combining is proposed to improve the bit error rate (BER) performance of layered asymmetrically clipped optical fast orthogonal frequency division multiplexing (ACO-FOFDM) for intensity-modulated and direct-detected (IM/DD) optical transmission systems. Layered ACO-FOFDM can compensate the weakness of traditional ACO-FOFDM in low spectral efficiency, the utilization of discrete cosine transform in FOFDM system instead of fast Fourier transform in OFDM system can reduce the computational complexity without any influence on BER performance. The BER performances of layered ACO-FOFDM system with improved receiver based on diversity combining and DC-offset FOFDM (DCO-FOFDM) system with optimal DC-bias are compared at the same spectral efficiency. Simulation results show that under different optical bit energy to noise power ratios, layered ACO-FOFDM system with improved receiver has 2.86, 5.26 and 5.72 dB BER performance advantages at forward error correction limit over DCO-FOFDM system when the spectral efficiencies are 1, 2 and 3 bits/s/Hz, respectively. Layered ACO-FOFDM system with improved receiver based on diversity combining is suitable for application in the adaptive IM/DD systems with zero DC-bias.
KW - Discrete cosine transform (DCT)
KW - Diversity combining
KW - Intensity-modulated and direct-detected (IM/DD) systems
KW - Layered asymmetrically clipped optical fast orthogonal frequency division multiplexing (ACO-FOFDM)
KW - Spectral efficiency
UR - http://www.scopus.com/inward/record.url?scp=85025074920&partnerID=8YFLogxK
U2 - 10.1007/s11107-017-0725-9
DO - 10.1007/s11107-017-0725-9
M3 - Article
AN - SCOPUS:85025074920
SN - 1387-974X
VL - 35
SP - 187
EP - 194
JO - Photonic Network Communications
JF - Photonic Network Communications
IS - 2
ER -