Resumen

PEREIRA RUISANCHEZ, Dariel et al. Study of Self-Interference on SFN for DTMB. EAC [online]. 2020, vol.41, n.1, pp. 73-88.  Epub 09-Mar-2020. ISSN 1815-5928.

This paper presents a study of the self-interference on SFN for DTMB based on the results of laboratory tests with professional and commercial receivers. The spectral inefficiency of the actual MFN represents a constraint for the evolution of the telecommunication technologies on Cuba, but It´s is necessary to know the real capabilities of SFN on DTMB before a possible transition. The principal restriction for the design of SFN is the incapability of the receivers to estimate and equalize correctly the signals with delays bigger than frame header length. However, signals within this interval could represent either constructive or destructive interference. For that reason, in this paper, two ways to determinate the influence of the auto-interference on the DTMB signal quality are presented. First, the SFN gain values are analyzed using the MER as the measuring parameter. The signal strength and the delay and attenuation between signals are varied to emulate real conditions of a two-transmitter SFN. Second, a group of commercial receivers is evaluated using the TOV condition to determine the necessary attenuation between two SFN signals for keeping the correct visualization.

Palabras clave : DTMB; SFN; MER; Self-Interference.

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