面向5G的基于IFFT/FFT方式的OFDM多载波传输技术

OFDM multi carrier transmission based on IFFT/FFT mode for 5G

由于时域、空域、码域和功率域等信息承载资源的可用范围有限,无线通信中承载高速率、高带宽和高数据量重任的信息承载资源仍然是以频域为主。基于IFFT/FFT方式的OFDM多载波传输技术是当前传输速率最快、传输带宽最大、频谱利用率最高的宽带数字式无线通信传输技术。本文以付里叶变换为理论基础,分析了IFFT/FFT完成数字式子载波正交频分的过程,以及IFFT/FFT中子载波与无线信道中子载波的对应关系等重要内容,可为全面了解基于IFFT/FFT方式的OFDM多载波传输技术提供许多有益的帮助。

Because the available range of information resources such as time domain,space domain,code domain and power domain is limited,the information carrying resources of high speed,high bandwidth and high data load in wireless communication are still dominated by frequency domain.OFDM based multi carrier transmission technology of IF-FT/FFT is the fastest transmission rate,the largest transmission bandwidth,the highest frequency spectrum utilization of broadband digital wireless communication transmission technology.In this paper,Fourier transform theory,analyzes the IFFT/FFT to complete the process of digital sub carrier orthogonal frequency division,important content and carrier IF-FT/FFT subcarrier and wireless channel in the corresponding relations,can provide many useful help to fully understand the IFFT/FFT based OFDM multi carrier transmission technology.