The larger the

path attenuation is, the less contribution is made to the total symbol branch metric increment.

Therefore, sound pressure is the resulting room sound level after sound power has been subjected to a room effect or sound path attenuation.

Sound path attenuations must be determined for both radiated and discharge sound in order to calculate the maximum allowable sound power levels.

In our previous work [33], we derived the path attenuation prediction expressions for a terrestrial link in Durban which are summarized below.

With these results and the knowledge of the path length, the expected path attenuation at 0.

Modern signal generators such as the unit shown in Figure 8 have the ability to simulate a Rician or Rayleigh distribution, with control over the speed through the path, the Doppler speed and the

path attenuation ratios.

Code Rate--Modern satellite modems use forward error-correcting codes to compensate for the very high

path attenuation that gives rise to low signal-to-noise ratios and high bit-error rates.

The maximum available path for the required availability, selected link hardware and the location of the installed link is determined by the condition in which the sum of the system gain and the two antenna gains are equal to the sum of the free space loss (FSL), the path attenuation due to rain and the path losses due to water vapor and atmospheric gases.

The total path attenuation is the sum of FSL, rain attenuation and the vapor losses.