Examinando por Autor "Carmona Valencia, Augusto"
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Ítem Estudio de sistemas de detección e inhibición para emisores celulares presentes en redes comerciales(Universidad EAFIT, 2014) Carmona Valencia, Augusto; Marulanda Bernal, José IgnacioÍtem Insertion of random spaces in time domain for frequency hopping sequences for RF systems(Universidad EAFIT, 2020) Carmona Valencia, Augusto; Marulanda Bernal, José IgnacioImprovements over the communications protocols are always a continuous research. Fast Frequency Hopping is an important method still in use and orthogonal codes used in SFH-CDMA are the special interest in several areas of technology. This research uses one coincident orthogonal code with restrictive adjacent spectral distance for the design of RF correlation detectors based on planar resonators arrays. Inclusion of uniform time delays sections between adjacent resonators is a well-known method to improve the MAI, at expenses of decrease the data rate and finally the bandwidth of protocol. Another strategy is selecting random delays between symbols in the way of adjacent peaks in cross correlation function vanishes, improving the dynamic range of asynchronous detector and accordingly the user number sharing the channel of communications.