Improvement of Fixed WiMAX OSTBC–OFDM Transceiver Based Wavelet Signals by Non-Linear Precoding Using SDR Platform
Mohammed Aboud Kadhim1, Hamood Shehab Hamid2, Nooraldeen Raaoof Hadi3
1Dr.Mohammed Aboud Kadhim, Foundation of Technical Education, Baghdad, Iraq.
2Dr.Hamood Shehab Hamid, Foundation of Technical Education, Al-Nbar Iraq.
3Nooraldeen Raaoof Hadi, Foundation of Technical Education, Baghdad, Iraq.
Manuscript received on October 25, 2013. | Revised Manuscript received on November 01, 2013. | Manuscript published on November 05, 2013. | PP: 143-150 | Volume-3 Issue-5, November 2013 . | Retrieval Number: E1939113513 /2013©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This paper inquire, a new Non-Linear precoding method to the acclimatization for the Worldwide Interoperability for fixed Microwave Access (WiMAX) baseband, in the physical layer performance of multi-antenna techniques, All cases are based on the IEEE 802.16d standard using orthogonal frequency division multiplexing (OFDM) based discrete wavelet transform (DWT) and 16-Quadrature amplitude modulation (QAM), ½ of coding rates and using SFF SDR development platform. The proposed Non-Linear Precoding Tomlinson-Harashima Precoding (THP) in WiMAX baseband consider a new way to further reduce the level of interference signals achieved much lower bit error rates and increase spectral efficiency. The proposed model was modeled-tested, and its performance was found to comply with International Telecommunications Union channel models (ITU) that have been elected for the wireless channel in the simulation process.
Keywords: THP, WIMAX, SFF SDR, OFDM, RS, Coding, OSTBC, IDWT, DWT.