基于训练序列的OOFDM采样时钟频率偏差估计算法
发布时间：2018-07-26 16:41
【摘要】：研究了光正交频分复用(optical orthogonal frequency division multiplexing,OOFDM)系统中采样时钟同步问题,提出了一种基于训练序列互相关特性的易于硬件实现的采样时钟频偏估计算法.算法的主要思想是对接收到的训练序列与本地已知训练序列作互相关,利用该相关值周期性变化一次产生一个采样点数差的特性,由少量加法器和一个除法器得到采样时钟频率偏差(sampling clock frequency offset,SCFO)值.通过在一个强度调制直接检测的光正交频分复用(intensity-modulation and direct-detection-OFDM,IMDD-OFDM)系统上的实验,验证了该算法具有较好的准确度和抗噪性能.
[Abstract]:The problem of sampling clock synchronization in optical orthogonal frequency division multiplexing (OOFDM) (optical orthogonal frequency division multiplexing system is studied. A sampling clock frequency offset estimation algorithm based on the cross-correlation property of training sequence is proposed, which is easy to implement in hardware. The main idea of the algorithm is to correlate the received training sequence with the local known training sequence, and make use of the characteristic of the periodic variation of the correlation value to produce a sampling point difference at a time. The sampling clock frequency deviation (sampling clock frequency off set SCFO) is obtained from a few adder and a divider. Experiments on a intensity-modulation and direct-detection-OFDM IMDD-OFDM system for direct detection of intensity modulation show that the proposed algorithm has good accuracy and anti-noise performance.
【作者单位】： 上海大学特种光纤与光接入网省部共建重点实验室;
【基金】：国家自然科学基金资助项目(61132004,61275073,61420106011) 上海市科委重点资助项目(13JC1402600,14511100100)
【分类号】：TN915.63
[Abstract]:The problem of sampling clock synchronization in optical orthogonal frequency division multiplexing (OOFDM) (optical orthogonal frequency division multiplexing system is studied. A sampling clock frequency offset estimation algorithm based on the cross-correlation property of training sequence is proposed, which is easy to implement in hardware. The main idea of the algorithm is to correlate the received training sequence with the local known training sequence, and make use of the characteristic of the periodic variation of the correlation value to produce a sampling point difference at a time. The sampling clock frequency deviation (sampling clock frequency off set SCFO) is obtained from a few adder and a divider. Experiments on a intensity-modulation and direct-detection-OFDM IMDD-OFDM system for direct detection of intensity modulation show that the proposed algorithm has good accuracy and anti-noise performance.
【作者单位】： 上海大学特种光纤与光接入网省部共建重点实验室;
【基金】：国家自然科学基金资助项目(61132004,61275073,61420106011) 上海市科委重点资助项目(13JC1402600,14511100100)
【分类号】：TN915.63
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