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Performance Improvement of Multi-UserMC-CDMA system Using Discrete Hartly Transform Mapper | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 31, Issue 9, 2013, Pages 1674-1691 PDF (963.11 K) | ||
| DOI: 10.30684/etj.2013.82182 | ||
| Author | ||
| Ali T. Shaheen | ||
| Abstract | ||
| Future wireless communication systems must be able to accommodate a large number of users and simultaneously to provide the high data rates at the required quality of service. In this paper a method is proposed to perform the N-Discrete Hartley Transform (N-DHT) mapper, which are equivalent to 4-Quadrature Amplitude Modulation (QAM), 16-QAM, 64-QAM, 256-QAM, … etc. in spectral efficiency. The N-DHT mapper is chosen in the Multi Carrier Code Division Multiple Access (MC-CDMA) structure to serve as a data mapper instead of the conventional data mapping techniques like QPSK and QAM schemes. The proposed system is simulated using MATLAB and compared with conventional MC-CDMA for Additive White Gaussian Noise, flat, and multi-path selective fading channels. Simulation results are provided to demonstrate that the proposed system improves the BER performance and reduce the constellation energy as compared with the conventional system | ||
| Keywords | ||
| Discrete Hartley Transform; Hartley Mapper; CDMA | ||
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