Novel DDS Based OFDM Transmitter Structure without IFFT and Interpolation Filter

作     者：Sanjun Liu Guangming Gan Sanjun Liu;Guangming Gan

作者机构：School of Information EngineeringHubei Minzu UniversityEnshi 445000China School of physics and electronic information engineeringHubei Engineering UniversityWuhan 432003China 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2021年第18卷第12期

页      面：219-229页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：the Natural Science Foun-dation of Hubei Province under Grant 2019CFB593 National Natural Science Foundation of China un-der Grant 61961016 Starting Fund for Doc-toral Research in Hubei Minzu University under Grant MY2018B018 

主　　题：OFDM transmitter direct digital synthe-sis(DDS) fast Fourier transform(FFT) 

摘      要：The traditional orthogonal frequency divi-sion multiplexing(OFDM)transmitter is implemented by inverse fast Fourier transform(IFFT),up-sampling and low pass shaping filter(LPSF),which occupy a large number of hardware resources and have long *** further meet the 5G and future 6G commu-nication requirements,this paper proposes a novel di-rect digital synthesis(DDS)based OFDM transmitter structure that can replace these *** to the strong parallelism of the system structure,it is very suitable for implementation on field programable gate array(FPGA)*** making two special sim-plifications to the primary structure,the refined struc-ture becomes very simple compared with the tradi-tional *** attractively,the proposed struc-ture has the following three advantages that i)the data transformation from frequency domain to time domain has zero latency,ii)the transformation length does not need to be an integer power of 2 and iii)the struc-ture does not even need to use any multiplier,thus leading to low implementation complexity and high *** experiments are carried out on Intel FPGA platform which show that our DDS based structure can save more than half of the resources com-pared with the traditional structures and can provide the same bit error rate(BER)performance under the condition without using any LPSF.