一种基于时域处理的低复杂度HACO-OFDM系统  

Low complexity HACO-OFDM system based on time-domain processing

作　　者：王涛[1] 陈善继[1] 贾国庆[1] 吴国庆[1] 陈超[1] WANG Tao;CHEN Shanji;JIA Guoqing;WU Guoqing;CHEN Chao(School of Physics and Electronic Information Engineering,Qinghai Nationafities University,Xining 810007,China)

机构地区：[1]青海民族大学物理与电子信息工程学院,西宁810007

出　　处：《光通信技术》2021年第1期28-31,共4页Optical Communication Technology

基　　金：青海民族大学新一代无线通信关键技术研究及原型开发科研创新团队资助。

摘　　要：针对计算复杂度高和误码率(BER)受限幅噪声估计精度影响的问题,提出一种低复杂度的混合非对称限幅光正交频分复用(HACO-OFDM)系统及基于时域处理的接收解调方法,详细介绍了HACO-OFDM系统的组成及其时域信号的结构特点,通过简单的时域信号处理实现限幅噪声消除。实验结果表明:该方案显著降低了计算复杂度;当限幅噪声估计误差较大时,系统接收机的脉冲幅度调制的离散多音频(PAM-DMT)支路BER性能显著优于传统系统接收机。Aiming at the problems of high computational complexity and the influence of bit error ratio(BER)limited amplitude noise estimation accuracy,a low complexity hybrid asymmetric limited amplitude optical orthogonal frequency division multiplexing(HACO-OFDM)system and a receiving demodulation method based on time domain processing are proposed.The composition of HACO-OFDM system and the structure characteristics of time domain signal are introduced in detail.The limited amplitude noise is eliminated by simple time-domain signal processing.The experimental results show that the proposed scheme significantly reduces the computational complexity,and the BER performance of pulse-amplitude-modulated discrete multitone(PAM-DMT)branch of system receiver is significantly better than that of traditional system receiver when the estimation error of clipping noise is large.

关 键 词：非对称限幅光正交频分复用 脉冲幅度调制离散多音频 混合不对称限幅光正交频分复用 计算复杂度 

分 类 号：TN929.1[电子电信—通信与信息系统]