5G候选波形Filtered-OFDM技术研究与分析  

Analysis on Filtered-OFDM Technology for 5G Candidate Waveform

作　　者：刘会衡 

机构地区：[1]湖北文理学院物理与电子工程学院,湖北襄阳441053

出　　处：《通信技术》2018年第2期289-293,共5页Communications Technology

基　　金：湖北文理学院科研基金项目资助(No.2016ZK020)~~

摘　　要：在对4G系统OFDM技术分析的基础上,针对5G候选波形Filtered-OFDM技术的特点,研究了2个子带情况下的系统性能。仿真结果表明,Filtered-OFDM系统的带外泄露比OFDM系统约低40 d B;当滤波器长度更长时,系统能获得较低的误码率,但滤波器设计更加复杂;保护间隔越大,两个子带数据的干扰越小,同时浪费了更多的频谱资源;调制阶数越高,误码率越高。在实际设计中,应该综合考虑这些因素的影响。Based on the analysis of OFDM technology for 4G system and characteristics of 5G candidate waveform Filtered-OFDM technology, the system performance of Filtered-OFDM with two sub-bands is explored. Simulation results indicates that the out-of-band emission of Filtered-OFDM system is improved by 40dB as compared with that of OFDM system. When the filter length is longer, the Filter-OFDM system can acquire a lower bit error rate, and however, filter becomes more complex in design. Meanwhile, the lager the guard-tone is, the smaller the interference of data in the two sub-bands would be. At the same time, more spectrum resources are wasted. In addition, when there is a higher modulation order, the bit error rate would go high. The influence of these factors should be comprehensively considered in practical design.

关 键 词：Filtered-OFDM 子带 滤波器 保护间隔 OFDM 

分 类 号：TN929.5[电子电信—通信与信息系统]