An Efficient Timing Synchronization Scheme for Asymmetrically Clipped Optical Orthogonal Frequency Division Multiplexing Systems Using Implicit Training

摘要：

Orthogonal frequency division multiplexing (OFDM) can effectively improve the information transfer speed and has the robustness for multipath dispersion. OFDM is a promising technology for optical communications. An efficient timing synchronization scheme for asymmetrically clipped optical OFDM (ACO-OFDM)-based optical wireless communications systems with implicit training is proposed. The pseudo-noise (PN) sequence modulated by ACO-OFDM as training sequence is sent synchronously with a data symbol in the same symbol cycle. By using local sequence and the received signal correlation operation, receiver accumulates the energy of the implicit training to achieve timing synchronization. Via simulation, both in line of sight (LOS) and diffuse channel, the proposed scheme also has better synchronization accuracy, less timing offset estimator variance. And it has the flexibility of time and power allocation, and it is able to improve the bandwidth efficiency.

关键词： wireless optical communications(WOC) asymmetrically clipped optical orthogonal frequency division multiplexing(ACO-OFDM) timing synchronization implicit training

作者: Wang Zhuo Wu Dapeng Liu Zuqi Wang Ruyan Cui Xin

作者单位: Special Research Centre for Optical Internet and Wireless Information Networks, CQUPT Chongqing, Chi Hebei Communication Design & Consultation CO., LTD Shijiazhuang, Hebei, China

会议类型: 国际会议

会议名称: The 2010 International Conference on Computer Application and System Modeling(2010计算机应用与系统建模国际会议 ICCASM 2010)

会议地点: 太原

会议语种:英文

页码: 338-342

在线出版日期: 2010-10-22（万方平台首次上网日期，不代表论文的发表时间）