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DC Field | Value | Language |
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dc.creator | Sameer Akram, Dawood | |
dc.date | 2017 | |
dc.date.accessioned | 2023-03-07T07:42:27Z | |
dc.date.available | 2023-03-07T07:42:27Z | |
dc.identifier.uri | http://dspace.unimap.edu.my:80/xmlui/handle/123456789/78088 | |
dc.description | Doctor of Philosophy in Communication Engineering | en_US |
dc.description.abstract | Orthogonal Frequency-Division Multiplexing (OFDM) has been widely utilized in the field of high speed communication systems, due to its prominent features. However, it is prone to impairments such as Inter-Symbol Interference (ISI), Inter-Carrier Interference (ICI), and high Peak-to-Average Power Ratio (PAPR). Moreover, the Guard Interval (GI), which is inserted between the OFDM symbols, will take up nearly 25% of the bandwidth, decreasing the data rate and increasing the system‟s complexity. To mitigate for these impairments, a new OFDM based on Discrete Multiwavelet Critical-Sampling Transform (OFDM-DMWCST) model (Model 1) has been proposed in this work. The theoretical analysis proved that the OFDM-DMWCST model has higher bandwidth efficiency and less computational complexity compared to other OFDM systems utilizing Discrete Multiwavelet Over-Sampling Transform (DMWOST), Discrete Wavelet Transform (DWT), and Fast Fourier Transform (FFT). The simulation results showed that the OFDM-DMWCST provides better Bit Error Rate (BER) performance among all OFDM systems over different channel models, namely, Additive White Gaussian Noise (AWGN), flat fading, and frequency-selective fading. For instance, in the frequency-selective fading channel with 4-QAM mapping, at BER = 10-3, the OFDM-DMWCST reported a 1.5 dB and 14.2 dB gain in Signal-to-Noise Ratio (SNR) over OFDM based on DWT and OFDM based on FFT, respectively, while the OFDM based on DMWOST failed to realize such a BER value. Also, the OFDMDMWCST model can realize better PAPR reduction compared to the traditional OFDM model. Moreover, a hybrid technique, consisting of FFT and Sliding Window (SW) algorithm, has been proposed for the development of a new model for OFDMDMWCST and render it more suitable for outdoor applications. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Universiti Malaysia Perlis (UniMAP) | en_US |
dc.rights | Universiti Malaysia Perlis (UniMAP) | en_US |
dc.subject | Wireless communication systems | en_US |
dc.subject | Orthogonal Frequency-Division Multiplexing (OFDM) | en_US |
dc.subject | Wireless | en_US |
dc.title | Development of new model for multiwavelet-based OFDM over wireless channel and its implementation in FPGA | en_US |
dc.type | Thesis | en_US |
dc.contributor.advisor | Anuar, Mat Safar, Prof. Ir. Dr. | |
dc.publisher.department | School of Computer and Communication Engineering | en_US |
Appears in Collections: | School of Computer and Communication Engineering (Theses) |
Files in This Item:
File | Description | Size | Format | |
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Page 1-24.pdf | Access is limited to UniMAP community. | 406.17 kB | Adobe PDF | View/Open |
Full text.pdf | This item is protected by original copyright. | 2.33 MB | Adobe PDF | View/Open |
Sameer.pdf | Declaration Form | 226.76 kB | Adobe PDF | View/Open |
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