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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 1    
Website: http://www.ijser.org
scirp IJSER >> Volume 3,Issue 1,January 2012
Channel Estimation in Multipath fading Environment using Combined Equalizer and Diversity Technique
Full Text(PDF, )  PP.87-91  
Author(s)
Deepmala Singh Parihar, Prof. Ravi Mohan
KEYWORDS
OFDM, Equalizer, Diversity, QAM
ABSTRACT
The channel estimation has become very vast field due to different types of interference present in wireless channel and in equipments. In this thesis, estimation algorithms for digital communications systems in the presence of Additive White Gaussian noise and Multipath environment are explored and their performance is investigated. In particular, least square Error and Zero forcing equalizers are used to provide the optimum solution and compensate for Inter-Symbol error. As the BER performance of equalizers in variable in multipath fading channel therefore we have combined Equal Gain combining and Maximal Ratio Combing Diversity techniques, and searched that Maximal Ratio combining techniques is able to fight with Co-Channel interference and Inter-symbol interference problem.
References
[1] THEODORE S. RAPPAPORT, “Wireless Communication, Principles and practice,”2nd Edition.

[2] Zhifeng Chen, “Performance Analysis of Channel Estimation and adaptive equalization in slow fading Channel”. University of Florida.

[3] Jan-Jaap van de Beek, Ove Edfors, magnus Sundell, Sarah Kate Wilson and Per Ola B. rjesson, “On Channel estimation in OFDM systems”.

[4] D.G.Brennan, “Lineardiversity combining techniques”,

[5] P. Fertt and G.Matz, “Multi-user channel estimation in OFDMA uplink systems based on irregular sampling and reduced pilot overhead”, In Proceedingof IEEE ICASSP 2007.

[6] Edfors,O. Sandell, M., Van de beek, J-J., Landsttrom, D, and sjoberg, F., An introduction orthogonal frequency division multiplexing, Luled Sweden: Luled Tekniska universitet, 1996, pp. 1-58.

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