Re: Assignment question for 563

Ed Casas (edc@ece.ubc.ca) Mon, 24 Jan 2000 16:14:05 -0800 

Date: Mon, 24 Jan 2000 16:14:05 -0800
From: Ed Casas <edc@ece.ubc.ca>
Subject: Re: Assignment question for 563



On Mon, Jan 24, 2000 at 02:55:18PM -0800, a student asked:

> For problem 2.8

> We are supposed to get the maximum distance using the received
> power equation

> P(d)=P(d0) (d/d0)^-n

> Does this (d) indicates the cell radius directly or it
> indicates the maximum distance for all cells. Which means that
> the cell radius would be d/N?

d is the distance at which the received power is measured.  In
this problem the power (-100 dBm) is specified at the co-channel
base station.  The major radius of a cell "R" and the distance
between (first-ring) co-channel base stations is "D".  For
well-behaved reuse ratios ("N"), the ratio D/R is a function of
the re-use ratio.

D/R and thus R (which is what the question is asking for).

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