Perhitungan Wireless

1
Perhitungan Wireless

• Onno W. Purbo
• Onno_at_indo.net.id

2
SOM Diagram
3
Konversi

• dBm (10Log10(Power Watts)) 30
• Watts 10((dBm - 30)/10)
• MilliWatts 10(dBm/10)

4
Rumus SOM

• SOM RX Signal Level - RX Sensitivity
• RX Signal Level TX Power - TX Cable Loss TX
  Antenna Gain - FSL RX Antenna Gain - RX Cable
  Loss

5
Free Space Loss

• Free Space Loss (isotropic)FSL (isotropic)
  20Log10(Frequency in MHz) 20Log10 (Distance in
  Miles) 36.6

6
Antenna Tilt

• Tilt 57.2957795((hB - hR)/(5280DistMi)) -
  (DistMi/7920)

7
Fresnel Zone Clearance

• Fresnel Zone 72.1 SqrRoot(dist1Mi dist2Mi /
  FreqGHz DistanceMi)