Re: Ass #1 problem 3-21

Ed Casas (edc@ece.ubc.ca) Fri, 28 Jan 2000 08:28:13 -0800 

Date: Fri, 28 Jan 2000 08:28:13 -0800
From: Ed Casas <edc@ece.ubc.ca>
Subject: Re: Ass #1 problem 3-21



On Thu, Jan 27, 2000 at 09:48:54PM -0800, Amr Mohamed wrote:

> Anyone solved problem 3-21 and can give us a clue about the
> relation betwee c/I and PL(d) for B1 and B2?

The forward link is the one from the base to the mobile.  The
mobile's C/I will be worst at the cell boundary.  It will be
given by the ratio of the path loss from the desired base to the
path loss from the interfering base.  However, in this case each
of the path losses has a probability distribution so you will
have to find the probability distribution of the C/I.

Hint: the sum of two uncorrelated Gaussian RV is also Gaussian
RV.

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