正交频分复用通信专业系统设计及其性能讨论正交频分复用通信系统设计及其性能讨论年 级:学 号:姓 名:专 业:指导老师:二零一五年五月摘 要由于 OFDM 技术出现了近四十年的时间，该技术在移动通信上已经得到快速进展。本论文主要讨论 OFDM 系统的应用，介绍了 OFDM 技术的基本概念和进展历程，并简要阐述 OFDM 在无线移动技术中的进展前景。在介绍 OFDM 原理的同时，比较 FDM 与 OFDM 的异同点，认识保护间隔和循环前缀对 OFDM 的意义，简述OFDM 的优势和缺点，了解 OFDM 的关键技术，讨论 OFDM 频域和时域的波形图，利用加窗技术来提高 OFDM 的功率谱密度。 关键字： 正交频分复用；码间干扰；循环前缀；高斯白噪声AbstractBecause of OFDM technology emerged about forty years, it has developed rapidly in the field of mobile communications,This thesis mainly studies the application of OFDM system, introduces the basic concepts and development of the OFDM technology, besides, the thesis also describes the future development in wireless mobile technology. While introduce the principles of OFDM, comparing the similarities and differences between FDM and OFDM, understanding the significance of protection interval and cyclic prefix in OFDM,I described the advantages and disadvantages of OFDM briefly, and known the key technologies of OFDM,studied the domain waveform figure OFDM frequency domain and time domain, by using the window technology to improve the power spectral density of OFDM.Keywords: OFDM; ISI; CP; WGN 目 录摘 要................................................................................................................................II Abstract..............................................................................................................................III第 1 章 绪论..........................................................................................................................1........................................................
