N-continuous正交频分复用时域算法仿真  

Simulation of Time-Domain N-continuous Symbol Padding OFDM Algorithm

作　　者：曹礼梅 周杰[1] 罗宏[1] CAO Li-mei;ZHOU Jie;LUO Hong(Lab.of Meteorological Detection and Information Processing,Nanjing University of Information Science ＆ Technology,Nanjing Jiangsu 210044,China)

机构地区：[1]南京信息工程大学气象探测与信息处理重点实验室,江苏南京210044

出　　处：《计算机仿真》2018年第9期183-188,257,共7页Computer Simulation

基　　金：国家自然科学基金面上项目(61471153;61771248);江苏省高校自然科学基金重大项目(14KJA510001)

摘　　要：传统OFDM系统频谱泄露严重,为抑制旁瓣已经提出N-continuous正交频分复用系统。针对N-continuous正交频分复用实现复杂的问题,提出一种基于N-continuous符号填充正交频分复用的时域算法。算法基于N-continuous符号填充正交频分复用的频域预编码方法,在时域处理信号,仅将平滑修正符号加入循环前缀中进行信号传输,理论上此算法可以在保证旁瓣抑制性能的同时,降低矩阵运算复杂度和接收机的接收复杂度。仿真也表明上述算法不影响旁瓣抑制性能,且易于实现,复杂度比传统N-continuous正交频分复用系统低了至少50%。Traditional OFDM system has serious spectrum leakage. N-continuous orthogonal frequency division multiplexing system has been proposed to suppress sidelobe. For the problem of large computation complexity of transmission and reception of N-continuous OFDM, aN-continuous symbol padding OFDM technique in time-domain is proposed. The algorithm is based on the N-continuous symbol padding orthogonal frequency division multiplexing in frequency domain. And this proposed algorithm is in the time domain, only adds the smoothing correction symbols into the cyclic prefix. Theoretically, this algorithm can guarantee the sidelobe suppression performance while reducing the computational complexity of the matrix and the receiver＇s reception complexity. Simulation experiments also show that this algorithm does not affect sidelobe suppression performance and it is easy to be implemented, and the complexity is lower than that of traditional N-continuous orthogonal frequency division muhiplexing system by at least 50%.

关 键 词：连续正交频分复用技术 旁瓣抑制 计算复杂度 误码率 

分 类 号：TN914.1[电子电信—通信与信息系统]