Resumo

FERMIN, José R.  e  PIZARRO, Juan C.. Modelo de radio propagación a través de un canal con ruido gaussiano. Rev. mex. fis. [online]. 2012, vol.58, n.6, pp.515-520. ISSN 0035-001X.

We present a physical model of radio waves propagation through a channel with white Gaussian noise. The continuous channel is simulated using a dissipative linear model, which consists of a flexible string of uniform density and immersed into a thermal bath. The channel is characterized by signal to noise ratio, which is calculated as a function of temperature, frequency of the signal and the propagation distance. For some value of temperature, propagation distance and frequency, the SNR exceeds the threshold below which Shannon's error-free transmission is not possible.

Palavras-chave : Linear system; thermal noise; signal to noise ratio (SNR); Gaussian channel; continuous channel.

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