Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/308154
Title: Performance analysis of mimo ofdm system using various techniques under rayleigh fading channels
Researcher: Kebila anns subi L
Guide(s): Albert raj A
Keywords: Engineering and Technology
Computer Science
Computer Science Information Systems
rayleigh fading
mimo ofdm
University: Anna University
Completed Date: 2019
Abstract: The high data transmission rates in the communication channel are a growing demand in recent times, in 4G and 5G broadband wireless communication. Transmitting the signal using Single Input Single Output (SISO) method weakens the transmitting data and it is also time consuming. When the number of antennas increases using Multiple Input and Multiple Output (MIMO), the complexity and Bit Error Rate (BER) are high while concentrating to reduce the BER, the PAPR is more. For achieving the reliable communication, the Orthogonal Frequency Division Multiplexing (OFDM) technique is used with the MIMO technique. To meet the requirements of high data rate and eliminate channel impairments, MIMOOFDM is the best technique. The OFDM systems that endorse the Cyclic-Delay Diversity (CDD) scheme require an operation of Inverse Discrete Fourier transform (IDFT) at the transmitter. Hence, the CDD affords a low-complexity by means of accumulating the transmission diversity in MIMO-OFDM systems. To improve the performance of the OFDM systems, CDD is a good approach in frequency diversity. In CDD Scheme before adding the cyclic prefix the OFDM symbols and sub carriers are transmitted uniquely with different cyclic delay. So the corresponding cyclic prefix is varied for each antenna. Time delay is added during each phase shift in frequency on a frequency band. So the sub carriers are spatially different from each other with each one being slightly delayed before being received by another antenna. Thus the frequency selectivity increases and the destructive fading occurs in every subcarrier but not in the full transport block. This allows making the coding channel easy to send data. This scheme is implemented in frequency domain with a limited number of sample newline
Pagination: xxii, 142p.
URI: http://hdl.handle.net/10603/308154
Appears in Departments:Faculty of Information and Communication Engineering

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02_certificates.pdf1.33 MBAdobe PDFView/Open
03_abstracts.pdf29.84 kBAdobe PDFView/Open
04_acknowledgements.pdf22.46 kBAdobe PDFView/Open
05_contents.pdf71.61 kBAdobe PDFView/Open
06_listofabbreviations.pdf75.07 kBAdobe PDFView/Open
07_chapter1.pdf377.3 kBAdobe PDFView/Open
08_chapter2.pdf238.56 kBAdobe PDFView/Open
09_chapter3.pdf3.48 MBAdobe PDFView/Open
10_chapter4.pdf1.84 MBAdobe PDFView/Open
11_chapter5.pdf1.51 MBAdobe PDFView/Open
12_conclusion.pdf109.14 kBAdobe PDFView/Open
13_references.pdf129.62 kBAdobe PDFView/Open
14_listofpublications.pdf59.94 kBAdobe PDFView/Open
80_recommendation.pdf128.21 kBAdobe PDFView/Open


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