The data transmission in WSN is in free space where it has minimum path loss as compared to WBAN.
According to a free-space path loss (FSPL) propagation model, minimum path loss for the frequency range of interest (470 to 790 MHz) is roughly −50dBB.
where Λ→ wavelength = (speedoflight/carrierfrequency), p Max → maximum transmission power possible, α → minimum path loss coefficient, sat → minimum signal attenuation threshold and minRecvPow → minimum power level to be able to physically receive a signal.
The path loss in the LOS scenario varies along element positions as expected, e.g., minimum path loss present at element position 360 (i.e., orientation angle 180°), which corresponds well to the element positions illustrated in Fig. 3.
To account for the potential inaccuracies (or estimation errors) in the location of a WSD or DVB-T receiver within a pixel, the above minimum path loss within a pixel is specified as the minimum of those calculated for the M surrounding pixels, i.e., the 8 first-tier adjacent pixels (M = 8), as illustrated in Figure 4.
But from (23) and (24), we have no indication about the validity of either C erg wf,FR1 ( H pl, 0 ) ≥ C erg wf,FR3 ( H pl, 0 ) or C erg wf,FR1 ( H pl, 0 ) ≤ C erg wf,FR3 ( H pl, 0 ). Figure 7 We illustrate the waterfilling gain for the ergodic capacity at the minimum path loss H p, 0 min for both frequency reuse schemes FR1 and FR3 (full-CSI scheme).
Figures 8 and 9 show the impact of path loss and minimum CQI constrains on EE gain of our proposed scheme.
When the path loss exponent is 2, EEMC also achieves minimum latency.
In such mechanisms, the minimum and maximum distances between a transmitter and each receiver are approximated from a signal path loss propagation model, such as the log-normal shadowing model [11].
For distances of approximately 120 m, the minimum energy consumption required to achieve the same estimation quality increases tenfold for both algorithms due to path loss.
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