Design and Simulation of parallel CDMA System Based on 3D-Hadamard Transform
Future wireless systems aim to provide higher transmission data rates, improved spectral efficiency and greater capacity. In this paper a spectral efficient two dimensional (2-D) parallel code division multiple access (CDMA) system is proposed for generating and transmitting (2-D CDMA) symbols thro...
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| Format: | Article |
| Language: | English |
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University of Diyala
2013-12-01
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| Series: | Diyala Journal of Engineering Sciences |
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| Online Access: | https://djes.info/index.php/djes/article/view/497 |
| _version_ | 1811282956384206848 |
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| author | Ali T. Shaheen |
| author_facet | Ali T. Shaheen |
| author_sort | Ali T. Shaheen |
| collection | DOAJ |
| description |
Future wireless systems aim to provide higher transmission data rates, improved spectral efficiency and greater capacity. In this paper a spectral efficient two dimensional (2-D) parallel code division multiple access (CDMA) system is proposed for generating and transmitting (2-D CDMA) symbols through 2-D Inter-Symbol Interference (ISI) channel to increase the transmission speed. The 3D-Hadamard matrix is used to generate the 2-D spreading codes required to spread the two-dimensional data for each user row wise and column wise. The quadrature amplitude modulation (QAM) is used as a data mapping technique due to the increased spectral efficiency offered. The new structure simulated using MATLAB and a comparison of performance for serial one-dimensional (1-D) CDMA and parallel (2-D) CDMA is made under Additive White Gaussian Noise (AWGN), flat fading and multi-path selective fading channels conditions. It is found that 2-D CDMA has better speed and performance than serial 1-D CDMA.
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| first_indexed | 2024-04-13T02:01:55Z |
| format | Article |
| id | doaj.art-9b612c84d15b49e08ff5e7bc91982394 |
| institution | Directory Open Access Journal |
| issn | 1999-8716 2616-6909 |
| language | English |
| last_indexed | 2024-04-13T02:01:55Z |
| publishDate | 2013-12-01 |
| publisher | University of Diyala |
| record_format | Article |
| series | Diyala Journal of Engineering Sciences |
| spelling | doaj.art-9b612c84d15b49e08ff5e7bc919823942022-12-22T03:07:36ZengUniversity of DiyalaDiyala Journal of Engineering Sciences1999-87162616-69092013-12-016410.24237/djes.2013.06404Design and Simulation of parallel CDMA System Based on 3D-Hadamard TransformAli T. Shaheen0Electrical Eng. Dept., College of Engineering, University of Baghdad Future wireless systems aim to provide higher transmission data rates, improved spectral efficiency and greater capacity. In this paper a spectral efficient two dimensional (2-D) parallel code division multiple access (CDMA) system is proposed for generating and transmitting (2-D CDMA) symbols through 2-D Inter-Symbol Interference (ISI) channel to increase the transmission speed. The 3D-Hadamard matrix is used to generate the 2-D spreading codes required to spread the two-dimensional data for each user row wise and column wise. The quadrature amplitude modulation (QAM) is used as a data mapping technique due to the increased spectral efficiency offered. The new structure simulated using MATLAB and a comparison of performance for serial one-dimensional (1-D) CDMA and parallel (2-D) CDMA is made under Additive White Gaussian Noise (AWGN), flat fading and multi-path selective fading channels conditions. It is found that 2-D CDMA has better speed and performance than serial 1-D CDMA. https://djes.info/index.php/djes/article/view/497DS-CDMA3-D Hadamard2-D Spreading Codes2-D CDMA2-D ISI Channel |
| spellingShingle | Ali T. Shaheen Design and Simulation of parallel CDMA System Based on 3D-Hadamard Transform Diyala Journal of Engineering Sciences DS-CDMA 3-D Hadamard 2-D Spreading Codes 2-D CDMA 2-D ISI Channel |
| title | Design and Simulation of parallel CDMA System Based on 3D-Hadamard Transform |
| title_full | Design and Simulation of parallel CDMA System Based on 3D-Hadamard Transform |
| title_fullStr | Design and Simulation of parallel CDMA System Based on 3D-Hadamard Transform |
| title_full_unstemmed | Design and Simulation of parallel CDMA System Based on 3D-Hadamard Transform |
| title_short | Design and Simulation of parallel CDMA System Based on 3D-Hadamard Transform |
| title_sort | design and simulation of parallel cdma system based on 3d hadamard transform |
| topic | DS-CDMA 3-D Hadamard 2-D Spreading Codes 2-D CDMA 2-D ISI Channel |
| url | https://djes.info/index.php/djes/article/view/497 |
| work_keys_str_mv | AT alitshaheen designandsimulationofparallelcdmasystembasedon3dhadamardtransform |