It works with me. Thanks, Quoting Saravanan Kandasamy <svana...@gmail.com>:
> > Dear Wben, > > I presume you like to know the relationship between distance vs RXthresh ? > > It might not be that straight forward as it depends on which multipath > propagation you like to use. > > Assume this topology > -Two nodes (T and R), node T would be transmitting to node R placed x > meter away. > > You need to know, > 1. Frequency you like to operate > 2. Which multipath propagation you like to use. > 3. Transmit power > 4. Gain of antenna > 5. Height of the transmitter and receiver > > Assume Two-Ray Ground Reflection Model > > Method > 1. Using the frequency, calculate the cut off distance (m) using > (4*PI*ht*hr)/lambda where lambda is c/freq, ht and hr is the height of > T and R. > 2. If the T-R separation is below the cut off distance, use Friis > Equation, if it is above the cut off distance use two-ray reflection > model. > 3. The Pr is the RXThresh you need to set in your simulation varying > the distance from the Friis/Two-ray ground reflection equation which > you can easily get from the internet. > > So when you get 300m using 1.76149e-10W RxThresh most likely you used > two-ray ground reflection model operating at 2.4GHz frequency. > > Good luck. > > rgds > Saravanan K > > > On Sat, Aug 4, 2012 at 2:18 PM, <wben-...@labri.fr> wrote: >> >> >> Dear all, >> Has anyone an idea about the different corresponding values of the >> parameter RXThresh, when varying the distances. Or when I could find >> these values? >> >> set RXThresh 1.76149e-10 ;#compute with threshold.cc for distance 300m >> >> >> Thanks. >> > >
