An adaptive algorithm named low complexity phase off- set estimation （LC-POE） is proposed for orthogonal frequency division multiplexing （OFDM） signals. Depending on the requirement, the estimation procedure is di...An adaptive algorithm named low complexity phase off- set estimation （LC-POE） is proposed for orthogonal frequency division multiplexing （OFDM） signals. Depending on the requirement, the estimation procedure is divided into several scales to accelerate the adaptive convergence speed and ensure the estimation accuracy. The true phase offset is estimated through shrinking the detection range and raising the resolution scale step by step. Both the convergence performance and complexity are discussed in the paper. Simulation results show the effectiveness of the proposed algorithm. The LC-POE algorithm is promising in the application of OFDM systems.展开更多
针对可见光通信直流偏置光正交频分复用(direct current-biased optical-OFDM,DCO-OFDM)系统中峰均功率比(peak-to-average power ratio,PAPR)大的缺点,采用限幅与滤波(clipping and filtering,CAF)、部分传输序列(partial transmit seq...针对可见光通信直流偏置光正交频分复用(direct current-biased optical-OFDM,DCO-OFDM)系统中峰均功率比(peak-to-average power ratio,PAPR)大的缺点,采用限幅与滤波(clipping and filtering,CAF)、部分传输序列(partial transmit sequence,PTS)、矩阵变换技术(matrix transformation method,MTM)对DCO-OFDM系统进行PAPR抑制。首先建立DCO-OFDM系统模型,然后对3种抑制技术进行原理分析,最后进行实验仿真,从互补累积分布函数(complementary cumulative distribution function,CCDF)和计算复杂度两方面比较了3种算法的PAPR抑制性能,并总结实验存在的不足以及提出展望。展开更多
基金supported by the National Natural Science Foundation of China (60972072)the National Science and Technology Major Projects: the New Generation Broadband Wireless Mobile Communication Network (2009ZX03003-03)the "111 Project" of China (B08038)
文摘An adaptive algorithm named low complexity phase off- set estimation （LC-POE） is proposed for orthogonal frequency division multiplexing （OFDM） signals. Depending on the requirement, the estimation procedure is divided into several scales to accelerate the adaptive convergence speed and ensure the estimation accuracy. The true phase offset is estimated through shrinking the detection range and raising the resolution scale step by step. Both the convergence performance and complexity are discussed in the paper. Simulation results show the effectiveness of the proposed algorithm. The LC-POE algorithm is promising in the application of OFDM systems.
基金The Natural Science Foundation of Tianjin,China(No.15JCYBJC17000)the Science Foundation for the Youth of Hebei Province,China(Nos.F2014202036,F2015202331)the High-level Talents Program of Hebei Province,China(Nos.C2013001048,GCC2014011)
文摘针对可见光通信直流偏置光正交频分复用(direct current-biased optical-OFDM,DCO-OFDM)系统中峰均功率比(peak-to-average power ratio,PAPR)大的缺点,采用限幅与滤波(clipping and filtering,CAF)、部分传输序列(partial transmit sequence,PTS)、矩阵变换技术(matrix transformation method,MTM)对DCO-OFDM系统进行PAPR抑制。首先建立DCO-OFDM系统模型,然后对3种抑制技术进行原理分析,最后进行实验仿真,从互补累积分布函数(complementary cumulative distribution function,CCDF)和计算复杂度两方面比较了3种算法的PAPR抑制性能,并总结实验存在的不足以及提出展望。
