ABSTRACT
SNR P N B NF MdB r= - + + +( log( ) )0 10 (17.2)where Pt is the power input to the transmitting antenna. Gt and Gr are antenna gains of the transmitting and receiving antennas, respectively. d and λ are the distance and wavelength, respectively. (aa) is the atmospheric attenuation at frequency fc. Lex is the excess loss not included in free-space loss (FSL). NF and M are the total noise figure of the receiver and the system margin in decibels. N0 is the noise power spectral density. B is the system noise bandwidth.
