Evaluating power in wireless transmission system

[Mr_electricals]

I'm working on a project where I need to evaluate received power in a wireless transmission system, specifically over a mid range distance (around 20–30 meters) in a semi obstructed indoor environment. I've got the TX power, antenna gains, and general layout, but real world readings are coming in lower than expected. I'm wondering if I'm underestimating multipath losses or maybe not accounting correctly for material attenuation. I used the Friis equation for a rough baseline, but clearly, I need something more dynamic. Anyone here have experience with modeling or measuring received power under these conditions? tools, tricks, or even cautionary tales welcome, I'm trying to dial this in without throwing more power at the problem.

 

[VoltWise]

Indoor wireless can be tough, especially over distances like 20–30 meters. The Friis model is a decent starting point, but it doesn't really deal with issues like multipath interference or material loss very well. I recommend looking into an indoor path loss model like ITU-R P.1238 and considering how walls affect the signal

If you can, run some ray tracing simulations or at least take RSSI measurements in the area to gather some real data. You'll often find that multipath and how materials absorb signals can really dampen the strength more than we think

 

[SpilBeard]

I'm working on a project where I need to evaluate received power in a wireless transmission system, specifically over a mid range distance (around 20–30 meters) in a semi obstructed indoor environment. I've got the TX power, antenna gains, and general layout, but real world readings are coming in lower than expected. I'm wondering if I'm underestimating multipath losses or maybe not accounting correctly for material attenuation. I used the Friis equation for a rough baseline, but clearly, I need something more dynamic. Anyone here have experience with modeling or measuring received power under these conditions? tools, tricks, or even cautionary tales welcome, I'm trying to dial this in without throwing more power at the problem.

Try the ITU indoor model or log distance with fading to get closer to reality and then check out NetSpot or Ekahau for quick heatmapping, or look into COST 231 if you're modeling deeper.

 

[poseidon't]

I'm working on a project where I need to evaluate received power in a wireless transmission system, specifically over a mid range distance (around 20–30 meters) in a semi obstructed indoor environment. I've got the TX power, antenna gains, and general layout, but real world readings are coming in lower than expected. I'm wondering if I'm underestimating multipath losses or maybe not accounting correctly for material attenuation. I used the Friis equation for a rough baseline, but clearly, I need something more dynamic. Anyone here have experience with modeling or measuring received power under these conditions? tools, tricks, or even cautionary tales welcome, I'm trying to dial this in without throwing more power at the problem.

You might want to look into ray tracing tools or even try a site survey app to get real readings. Also, don't sleep on the impact of stuff like metal studs or tinted glass.