太赫兹通信是未来6G中业界关注的重要场景之一。太赫兹频段可以支持超大带宽和超高速率的无线通信，目前3 GPP协议中的正交频分复用(Orthogonal Frequency Division Multiplex，OFDM)技术使用支持的最大子载波间隔和最大快速傅里叶逆变换(Inverse Fast Fourier Transform，IFFT)点数不足以满足太赫兹场景超大带宽的需求。提出了一种新的波形方案:广 义滤波器组-正交频分复用(Generalized Filter Bank Orthogonal Frequency Division Multiplexing，GFB-OFDM)波形，可以将原有的大点数IFFT分解成两级小点数的IFFT，以支持更大的传输带宽。GFB-OFDM还可以灵活地支持不同子载波间隔、不同数据类型的联合处理，以实现不同业务类型的传输。GFB-OFDM在接收端仍然可以采用传统的循环前缀正交频分复用(Cyclic Prefix Orthogonal Frequency Division Multiplexing，CP-OFDM)接收方法，仿真结果表明GFB-OFDM的综合性能优于CP-OFDM。
A Novel Waveform Scheme Suitable for Terahertz Communication:GFB-OFDM
Terahertz communication is one important scenario in future 6G.Terahertz band can support extremely large bandwidth and ultra-high speed wireless communication.At present,the maximum subcarrier interval and the maximum Inverse Fast Fourier Transform(IFFT)points supported by the Orthogonal Frequency Division Multiplexing(OFDM)technology in 3GPP protocol are not enough to meet the demand of super-large bandwidth in terahertz scenarios.Therefore,we propose a novel waveform scheme:General-ized Filter Bank Orthogonal Frequency Division Multiplexing(GFB-OFDM)waveform.It can decompose original large points IFFT into two levels of small points IFFT to support greater transmission bandwidth.GFB-OFDM can also flexibly support joint processing of differ-ent subcarrier intervals and different data types to realize transmission of different service types.GFB-OFDM can still adopt traditional Cyclic Prefix Orthogonal Frequency Division Multiplexing(CP-OFDM)receiving method at the receiving end.Simulation results show that the comprehensive performance of GFB-OFDM is superior to that of CP-OFDM.
terahertzGFB-OFDMwaveformextremely large bandwidth
万方数据
维普
