Performance analysis and improvement of digital communications in Nakagami-m fading channels

Nakagami-m fading model is summed up by Nakagami from a large number of experimental data in 1960. It is a very flexible model with the fading parameter m and has a relatively simple form mathematically. In this Thesis, we did the analysis and simulation to evaluate the bit error rate (BER) performa...

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Main Author: Ma, Xinyan
Other Authors: Li Kwok Hung
Format: Thesis-Master by Coursework
Language:English
Published: Nanyang Technological University 2021
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Online Access:https://hdl.handle.net/10356/149371
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1493712023-07-04T17:00:41Z Performance analysis and improvement of digital communications in Nakagami-m fading channels Ma, Xinyan Li Kwok Hung School of Electrical and Electronic Engineering EKHLI@ntu.edu.sg Engineering::Electrical and electronic engineering::Wireless communication systems Nakagami-m fading model is summed up by Nakagami from a large number of experimental data in 1960. It is a very flexible model with the fading parameter m and has a relatively simple form mathematically. In this Thesis, we did the analysis and simulation to evaluate the bit error rate (BER) performance for Nakagami-m fading channels. After the performance analysis, the problem comes to optimization. To make compensation for the loss caused by the fading effect, we here choose to apply some combining schemes at the receive side. Since the maximal ratio combining (MRC) scheme yields an optimal performance for coherent modulations, it is analyzed and simulated. From the simulation results, we can see that the MRC scheme can help to improve the system performance, and its ability increases with the number of antennas at the receiver side. Through our analysis, we found that the existing works have not taken the constraint of the total transmitted energy into consideration. So, we also made a supplement analysis on that case. The curves of the corresponding theoretical results are also plotted and found consistent with the simulation results. The selection combining (SC) scheme is also analyzed due to its simplicity, and a comparison between the two schemes is made. Furthermore, since the MRC scheme requires full knowledge of all channel parameters, which leads to high complexity for the receivers, we tried to find a balance between system performance and complexity by introducing the hybrid combining scheme. The simulation result for the hybrid selection/maximal-ratio combining (HS/MRC) scheme is consistent with our analysis. Master of Science (Communications Engineering) 2021-05-19T04:06:59Z 2021-05-19T04:06:59Z 2021 Thesis-Master by Coursework Ma, X. (2021). Performance analysis and improvement of digital communications in Nakagami-m fading channels. Master's thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/149371 https://hdl.handle.net/10356/149371 en application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering::Wireless communication systems
spellingShingle Engineering::Electrical and electronic engineering::Wireless communication systems
Ma, Xinyan
Performance analysis and improvement of digital communications in Nakagami-m fading channels
description Nakagami-m fading model is summed up by Nakagami from a large number of experimental data in 1960. It is a very flexible model with the fading parameter m and has a relatively simple form mathematically. In this Thesis, we did the analysis and simulation to evaluate the bit error rate (BER) performance for Nakagami-m fading channels. After the performance analysis, the problem comes to optimization. To make compensation for the loss caused by the fading effect, we here choose to apply some combining schemes at the receive side. Since the maximal ratio combining (MRC) scheme yields an optimal performance for coherent modulations, it is analyzed and simulated. From the simulation results, we can see that the MRC scheme can help to improve the system performance, and its ability increases with the number of antennas at the receiver side. Through our analysis, we found that the existing works have not taken the constraint of the total transmitted energy into consideration. So, we also made a supplement analysis on that case. The curves of the corresponding theoretical results are also plotted and found consistent with the simulation results. The selection combining (SC) scheme is also analyzed due to its simplicity, and a comparison between the two schemes is made. Furthermore, since the MRC scheme requires full knowledge of all channel parameters, which leads to high complexity for the receivers, we tried to find a balance between system performance and complexity by introducing the hybrid combining scheme. The simulation result for the hybrid selection/maximal-ratio combining (HS/MRC) scheme is consistent with our analysis.
author2 Li Kwok Hung
author_facet Li Kwok Hung
Ma, Xinyan
format Thesis-Master by Coursework
author Ma, Xinyan
author_sort Ma, Xinyan
title Performance analysis and improvement of digital communications in Nakagami-m fading channels
title_short Performance analysis and improvement of digital communications in Nakagami-m fading channels
title_full Performance analysis and improvement of digital communications in Nakagami-m fading channels
title_fullStr Performance analysis and improvement of digital communications in Nakagami-m fading channels
title_full_unstemmed Performance analysis and improvement of digital communications in Nakagami-m fading channels
title_sort performance analysis and improvement of digital communications in nakagami-m fading channels
publisher Nanyang Technological University
publishDate 2021
url https://hdl.handle.net/10356/149371
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