1. August 2004
doc.: IEEE /444r0
August 2004
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: Propagation Pathloss for TG4 Range Issue
Date Submitted: 24 August 2004
Source: Colin Lanzl
Address: 83 Nottingham Drive, Nashua, New Hampshire, 03062, USA
Voice: , FAX: ,
Re: Pathloss model for TG4 in support of TG4a range comparison.
Abstract: This document provides a pathloss model to be used to determine TG4 device ranges for use in comparing proposals for TG4a.
Purpose: This document is provided in support of TG4a activities.
Notice: This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P
Colin Lanzl, Kai Siwiak
Colin Lanzl, Kai Siwiak

2. Propagation Pathloss model
August 2004
Propagation Pathloss model
Colin Lanzl
Kai Siwiak
Colin Lanzl, Kai Siwiak

3. Propagation pathloss model description
August 2004
doc.: IEEE /444r0
August 2004
Propagation pathloss model description
Model provides for free-space propagation (1/r^2) in a near-zone propagation and far-zone propagation as 1/r^.
Model provides for a breakpoint, dt, between near-zone and far-zone.
Model can be used for both narrow-band and wide-band applications.
With suitable definition of dt , model can be used for both indoor and two-ray propagation.
Colin Lanzl, Kai Siwiak
Colin Lanzl, Kai Siwiak

4. Model PL(d )= -10log{[c/(4*p * d *fm)]2 * [1-exp(-(dt /d)*(g-2))]},
August 2004
doc.: IEEE /444r0
August 2004
Model
PL(d )= -10log{[c/(4*p * d *fm)]2 * [1-exp(-(dt /d)*(g-2))]},
where:
PL: pathloss,
d: distance between transmitter and receiver,
fm: geometric mean of transmitted frequency band,
g : propagation constant after breakpoint,
c: velocity of propagation,
and
dt: breakpoint distance from transmitter.
Colin Lanzl, Kai Siwiak
Colin Lanzl, Kai Siwiak

5. August 2004
Indoor Parameters
dt is physically defined by the environment, as it represents the distance of the first scatterers from the transmitter; suggested indoor office value is 3m (???)
In an indoor environment ,the suggested value for g is 3.3 (??)
Colin Lanzl, Kai Siwiak

6. August 2004
Outdoor Parameters
Outdoors, a two-ray model (propagation over a ground plane) is appropriate;
Suggested parameters:
dt=h1*h2*4*p*fm/c and g=4,
where
h1 and h2 are the transmit and receive antenna heights (in meters) above the ground plane.
Colin Lanzl, Kai Siwiak