改进型ACO-OFDM调制系统及其FPGA实现  

Visible Light Radio Frequency Identification Tag System Based on Improved ACO-OFDM Modulation

作　　者：梁继然 杨智群 毛陆虹 冯人海 Liang Jiran;Yang Zhiqun;Mao Luhong;Feng Renhai(School of Microelectronics,Tianjin University,Tianjin 300072,China;School of Automation,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学微电子学院,天津300072 [2]天津大学自动化学院,天津300072

出　　处：《南开大学学报（自然科学版）》2022年第5期56-60,共5页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：国家重点研发计划(2017YFB0403603)。

摘　　要：非对称削波光正交频分复用(ACO-OFDM)是一种适用于光通信的高效数字调制解调系统.传统具有高速傅里叶变换模块(FFT)的ACO-OFDM系统,由于FFT模块的架构与系统本身不完全匹配,造成了硬件资源的大量占用与频谱资源的浪费.为了解决这个问题,完成了基2标准时延结构流水线型FFT处理器的设计验证,在150 MHz的系统时钟下,输出延迟为990 ns,功能表现良好.并通过加入载波同步单元,降低了约60%误码率.仿真结果表明,该方法提高了ACO-OFDM系统的通信性能.Asymmetric clipped optical orthogonal frequency division multiplexing(ACO-OFDM)is an efficient digital modulation and demodulation system for optical communications.The traditional ACOOFDM system with a fast Fourier transform module(FFT),because the architecture of the FFT module does not completely match the system itself,causes a large occupation of hardware resources and waste of spectrum resources.In order to solve this problem,a new non-uniform limiting optical orthogonal frequency division multiplexing(ACO-OFDM)system is proposed.The bit error rate is reduced about 60%by adding a carrier synchronization unit and the stability of the system is improved.Under 150 MHz system clock,the output delay is 990 ns.Simulation results show that the proposed method improves the communication performance of the ACO-OFDM system.

关 键 词：非对称削波光正交频分复用 载波同步 快速傅里叶变换 

分 类 号：TN409[电子电信—微电子学与固体电子学]