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IJSTR >> Volume 3- Issue 5, May 2014 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Analysis Of Ici Using Blackman Gaussian And Kaiser Window Fuctions

[Full Text]



Alok Kumar Dubey, Prateek Nigam



Index Terms: Frequency Spectrum, SIR, Power of Desired Signal, Fading and AWGN, OFDM, ICI.



Abstract: Orthogonal Frequency Division Multiplexing (OFDM) is technique of multi-carrier modulation in which a single high rate data-stream is first divided into multiple low rate data-streams and is then modulated using sub-carriers. These sub-carriers are orthogonal to each other. Its main advantages are multipath delay spread tolerance, high spectral efficiency, immunity to Frequency Selective Fading Channels, efficient modulation and demodulation process which is performed by computationally efficient Inverse Fast Fourier Transform (IFFT) and Fast Fourier Transform (DFT) operation respectively. An important disadvantage of OFDM is the carrier frequency offset which disturbs the orthogonality among the carriers and results Inter carrier interference (ICI). The undesired ICI degrades the performance of the system. In Orthogonal Frequency Division Multiplexing (OFDM) carriers are orthogonally related and hence no guard band is necessary like in Frequency Division Multiplexing (FDM). So spectrums of users can overlap which enhances the spectrum efficiency of the network. In this thesis one of the main concern of OFDM, inter carrier interference (ICI) is considered using different window functions in frequency domain in pulse shaping of OFDM data symbols which are considered uncorrelated. It reduces the inter carrier interference (ICI) power into simply the square magnitude of window function. Here we have taken different window functions for comparing performance of the wireless links in content of ICI power and desired received signal.



[1]. Md. Al- Mahadi Hasan, Shoumik Das, Md. Imdadul Islam, and M. R. Amin, “REDUCTION of ICI in OFDM USING WINDOW FUNCTIONS”, 2012 7th International Conference on Electrical and Computer Engineering, 20-22 December, 2012, Dhaka, Bangladesh.

[2]. R.W Chang, “Synthesis of Band-Limited Orthogonal Signals for Multi-channel Data Transmission,” Bell Syst. Tech., Vol.45, pp.1775-1797, Dec. 1966.

[3]. R.W Chang, “Orthogonal Frequency Division Multiplexing,” U.S Patent 3388455, Jan 6, 1970, Filed Nov.4.1966.

[4]. B.R. Satzberg, “Performance of an Efficient Parallel Data Transmission System, IEEE Trans. Commun. Technol., Vol.COM-15, no.6, pp. 805-811, Dec 1967.

[5]. S .Weinstein and P. Ebert, “Data Transmission by Frequency Division Multiplexing Using the Discrete Fourier Transform,” IEEE Transaction of Communication, Vol.19, and Issue: 5, pp. 628–634, Oct.1971.

[6]. B. Hirosaki, “An Analysis of Automatic Equalizers for Orthogonally Multiplexed QAM Systems,” IEEE Transaction Communication, Vol.28, pp.73-83, Jan.1980.

[7]. B. Hirosaki, S.Hasegawa, and A. Sabato, “Advanced Group-band Data Modem Using Orthogonally Multiplexed QAM Technique,” IEEE Trans. Commun. Vol. 34, no. 6, pp. 587-592, Jun. 1986.

[8]. M. A. Saeed, B. M. Ali and M. H. Habaebi, “Performance evaluation of OFDM scenes over multipath fading channel”, in The Asia-Pacific Conference on Communications (APCC), Malaysia, 2003, pp. 415-419.

[9]. J. Armstrong, “Analysis of new and existing methods of reducing inter carrier interference due to carrier frequency offset in OFDM,” in IEEE Trans. Communication., vol. 47, pp. 365-369, Mar. 1999.

[10]. A. Peled and A. Ruiz, “Frequency Domain Data Transmission using Reduced Computational Complexity Algorithms,” Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '80, Vol. 5, pp.964 – 967, Apr. 1980.

[11]. M.S Zimmerman and A.L Kirsch, “The AN/GSC-10 (KATHRYN) Variable rate data modem for HF radio,” IEEE Trans. Commun. Technol., Vol.15, no.2, pp. 197-205, Apr. 1967.

[12]. W.E. Keasler, Jr., “Reliable Data Communications over the Voice band-width Telephone Using Orthogonal Frequency Division Multiplexing,” Ph.D. dissertation, Univ. Illinois, Urbana, Il, 1982.

[13]. L. J. Cimini, “Analysis and Simulation of a Digital Mobile Channel using Orthogonal Frequency Division multiplexing,” IEEE Transaction Communications, Vol.33, pp. 665-675. July 1985.