摘要
针对直流偏置光正交频分复用(DCO-OFDM)水下光无线通信(UOWC)系统存在高峰均功率比(PAPR)问题,文中采用自适应迭代限幅滤波(AICF)法降低信号PAPR,并根据均方误差最小准则(MMSE)对限幅后的失真信号进行补偿,使失真信号与原始信号间的误差达到最小。仿真结果表明:与传统方法相比,该方案在相同的迭代次数条件下,能进一步降低PAPR,并且保证误码率(BER)性能不受影响。
In the underwater optical wireless communication(UOWC)systems,the problem of high peak-to-average power ratio(PAPR)exists in the direct current-biased optical orthogonal frequency division multiplexing(DCO-OFDM)signals.The adaptive iterative clipping and filtering(AICF)scheme is adopted to reduce the PAPR of the optical OFDM(O-OFDM)signal,and the minimum mean square error(MMSE)method is utilized to compensate the distorted signal after clipping,to minimize the error between the processed signals and the original signals.The simulation results show that the proposed scheme significantly outperforms the conventional scheme in the PAPR reduction performance,without sacrificing the BER performance under the same iteration numbers.
作者
康博
白菊蓉
KANG Bo;BAI Ju-rong(School of Electronic Engineering,Xi'an University of Posts & Telecommunications,Xi'an 710121,China)
出处
《信息技术》
2019年第2期66-70,共5页
Information Technology
基金
国家自然科学基金(61775180)
