期刊名称：International Journal of Engineering and Computer Science
印刷版ISSN：2319-7242
出版年度：2015
卷号：4
期号：7
页码：12980-12986
出版社：IJECS
摘要：Orthogonal Frequency Division Multiplexing is considered as an advanced communication model which haswide range of applications such as 3G, 4G, and Wi-Fi etc. Comparing with Frequency Division Multiplexing(FDM), we are providing a higher level of spectral efficiency by using the OFDM Multiple Carriers. Toovercome the problems of the Inter carrier interference (ICI) and inter symbol interference (ISI), using of thecyclic prefix which uses the available bandwidth of 20% for the loss of the Orthogonality between the subcarriers in OFDM. Providing of better Orthogonality which is based on the wavelet of OFDM andimproving of BER (Bit Error Rate) is also used in it. Increasing of the spectral efficiency we doesn’t requirethe cyclic prefix which is based on the wavelet system. In the upcoming of the 4th generation LTE, using ofwavelets in place of Discrete Fourier Transform (DFT) based OFDM is proposed. Using of the wavelets andDFT based OFDM Systems we have compared the performance of the BER
关键词：Inter carrier interference (ICI) and inter symbol interference (ISI); cyclic prefix
