23 p.
length = 1 + (attenuation > 21.0 ?
24 ceil((attenuation - 7.95) / (2.285 * transition)) :
25 ceil(5.79 / transition));
26 p.
beta = (attenuation > 50.0 ?
27 0.1102 * (attenuation - 8.7) :
29 0.5842 * pow(attenuation - 21.0, 0.4) + 0.07886 * (attenuation - 21.0) :