Enhanced sampling frequency offset resistance method based on precoding technique in W-band OFDM RoF systems
Enhanced sampling frequency offset resistance method based on precoding technique in W-band OFDM RoF systems
复制标题
DOI：
10.1016/j.optcom.2020.125711
复制
发表时间：
2020-07
影响因子：
2.4
通讯作者：
Zhihua Zhou;Jing He;Yi Liu;Jie Ma;Yaoqiang Xiao
中科院分区：
文献类型：
--
作者：
Zhihua Zhou;Jing He;Yi Liu;Jie Ma;Yaoqiang Xiao
针对W波段OFDM RoF系统中的采样频偏问题，提出了一种预编码技术，并进行了实验验证。研究和比较了Walsh-Hadamard变换（WHT）预编码、离散Hartley变换（DHT）预编码、Zadoff-Chu变换（ZCT）预编码和正交循环矩阵变换（OCT）预编码。从理论上分析了在常规OFDM和预编码OFDM（precoded-OFDM）系统中，SFO引起的子载波间干扰（ICI）。实验结果表明，在W频段OFDM RoF系统中，采用OCT预编码的OFDM（OCT-OFDM）可以显着抵抗SFO引起的ICI。
Precoding technique is proposed and experimental demonstrated to resist sampling frequency offset (SFO) in W-band OFDM RoF systems. Walsh–Hadamard transform (WHT)-precoding, discrete Hartley transform (DHT)-precoding, Zadoff–Chu transform (ZCT)-precoding, and orthogonal circulant matrix transform (OCT)-precoding are investigated and compared. SFO-induced inter-carrier interference (ICI) on each subcarrier of conventional OFDM and OFDM with precoding (precoded-OFDM) are theoretical analyzed. Experimental results indicate OFDM with OCT-precoding (OCT-OFDM) can obtain a remarkable resistance to the SFO-induced ICI in W-band OFDM RoF systems.