TY - JOUR
T1 - Photonic-aided pre-coding QAM signal transmission in multi-antenna radio over fiber system
AU - Zhang, Qi
AU - Yu, Jianjun
AU - Li, Xinying
AU - Zhu, Ming
AU - Xin, Xiangjun
AU - Chang, Gee Kung
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/6/14
Y1 - 2015/6/14
N2 - Abstract A novel method has been proposed and experimentally demonstrated to provide photonic-aided pre-coding quadrature amplitude modulation (QAM) signal transmission in multi-antenna radio over fiber system to increase the throughput. For downlink, two different multi-level amplitude-shift-keying (M-ASK) modulated signals, such as 4-ASK signals, are applied on two uncorrelated optical Mach-Zehnder modulators at central office. After photonic-aided pre-coding module and photo-detection process, the received M-ASK mm-waves from two remote access units (RAUs) can be synthesized to a M2-QAM signal in the proposed system. Regardless of forward error correction (FEC) coding overhead, the 4-Gb/s and 8-Gb/s 16-QAM mm-wave signals are obtained from two independent 2-Gb/s and 4-Gb/s 4-ASK 40-GHz channels, respectively. The experimental results show that a doubled bit rate of the original 4-ASK one can be achieved without additional digital signal processing (DSP) in small cell RAUs and mobile users.
AB - Abstract A novel method has been proposed and experimentally demonstrated to provide photonic-aided pre-coding quadrature amplitude modulation (QAM) signal transmission in multi-antenna radio over fiber system to increase the throughput. For downlink, two different multi-level amplitude-shift-keying (M-ASK) modulated signals, such as 4-ASK signals, are applied on two uncorrelated optical Mach-Zehnder modulators at central office. After photonic-aided pre-coding module and photo-detection process, the received M-ASK mm-waves from two remote access units (RAUs) can be synthesized to a M2-QAM signal in the proposed system. Regardless of forward error correction (FEC) coding overhead, the 4-Gb/s and 8-Gb/s 16-QAM mm-wave signals are obtained from two independent 2-Gb/s and 4-Gb/s 4-ASK 40-GHz channels, respectively. The experimental results show that a doubled bit rate of the original 4-ASK one can be achieved without additional digital signal processing (DSP) in small cell RAUs and mobile users.
KW - Multi-antenna
KW - Photonic-aided precoding
KW - Radio-over-fiber (RoF)
UR - http://www.scopus.com/inward/record.url?scp=84931262066&partnerID=8YFLogxK
U2 - 10.1016/j.optcom.2015.05.067
DO - 10.1016/j.optcom.2015.05.067
M3 - Article
AN - SCOPUS:84931262066
SN - 0030-4018
VL - 354
SP - 236
EP - 239
JO - Optics Communications
JF - Optics Communications
M1 - 20204
ER -