CDRsp - Scripta-Ingenia, N.º 5
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Percorrer CDRsp - Scripta-Ingenia, N.º 5 por autor "Gomez-Pulido, J. A."
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- Orthogonal perfect DFT Golay codesPublication . Lanza-Gutierrez, J. M.; Ferreira, M.; Gomez-Pulido, J. A.; Priem-Mendes, S.; Pereira, J. S.; Silva, H. J. A.Deciding about which coding sequences should be used is an important issue in many communication systems, such as those employing Code Division Multiple Access (CDMA). In this paper, we propose a cascading electronic codec based on a recursive algorithm for the generation of perfect sequences, derived from an Inverse Discrete Fourier Transform (IDFT) of Golay codes. The sequences generated have a low Peak-to-Average Power Ratio (PAPR), around 3 dB, which is the PAPR of a sine wave. The proposal is compared to the original Golay codes, verifying that our codec provides better crosscorrelation and autocorrelation results, crucial to gain immunity to multi-path interference.