Re: Path loss eqn

Ed Casas (edc@ece.ubc.ca) Tue, 29 Feb 2000 07:38:41 -0800 

Date: Tue, 29 Feb 2000 07:38:41 -0800
From: Ed Casas <edc@ece.ubc.ca>
Subject: Re: Path loss eqn



On Mon, Feb 28, 2000 at 01:01:09PM -0800, Maria Lei [4681] wrote:

> I am confused by the following equations:
> 
> a) Pr(d) = Po(d/do)^-n
>    
>    10logPr(d) = 10logPo - 10nlog(d/do)
> 
> b) PL(dB) = PL(do) + 10nlog(d/do)
> 
> My question is when should each be used? 


(a) is for computing received power, (b) is for computing the
path loss.

The two equations are related.  The received power (Pr) is the
power at the reference distance (P0) times (plus, in dB) the path
loss from the reference point to the receiver.

-- 
Ed Casas   edc@ece.ubc.ca   http://casas.ece.ubc.ca   +1 604 822-2592