Browsing by Autor "Erick Adrian Iglesias Rodriguez"

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    Analysis and numeric determination of difference between SNR and CNR in Digital Television ISDB-Tb
    (2018) Erick Adrian Iglesias Rodriguez
    In the present article, it is analyzed the difference between the Signal-to-Noise Ratio (SNR) and the Carrier-to-Noise Ratio (CNR) for the Digital Television System, ISDB-Tb (Integrated Services Digital Broadcasting-Terrestrial Brazil). To achieve it, the number and amplitude of payload and pilot carriers into ISDB-Tb useful signal's bandwidth are considered based on the standard [1, p.13]. The importance of the analysis is given by the section I based on [2]. It is also considered some analysis of the SNR and the CNR proposed by [3, p.404, 389] for the European digital television system DVB-T (Digital Video Broadcasting Terrestrial). Finally, an experiment is performed in order to validate the theoric results.
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    Measurements and Analysis of I/Q Signal Using Software Defined Radio for Evaluation of Technical Operational Quality of Digital Television ISDB-T
    (2018) Erick Adrian Iglesias Rodriguez
    In the present article, we will use a tool based on Software Defined Radio (SDR) [1] and USRP (Universal Serial Radio Peripheral) N200 [2] to measure I/Q imbalance impairments such as Amplitude Imbalance, Quadrature Error as well as Residual Carrier, which get worse the quality of the digital television base band signal. These parameters evaluate the performance of a Digital Television modulator [11]. Moreover, we will also measure the Signal-to-Noise Ratio and the Modulation Error Ratio, the latter will provide a single “figure of merit” analysis of the received signal in order to summary all impairments present from transmitter to receiver.