Page 14 - GuideFWA

1. INTRODUCTION

1.1. OBJECTIVE

The objective of this report is to quantify the interference between:
• FWA TDD systems (1910-1930 MHz) and PCS systems operating in adjacent bands

(1850-1990 MHz)
• FWA TDD systems and UPCS systems operating in the same band (1910-1930 MHz)
As a reference, a secondary priority is to quantify the interference between:
• PCS systems and PCS systems operating in adjacent frequency sub-bands

(1850-1910, 1930-1990 MHz)
• FWA TDD systems and FWA TDD systems operating in the same band (1910-1930 MHz)

1.2. SCOPE

The following systems were analyzed:
• PCS systems: PCS1900, IS-95 CDMA, IS-136 TDMA
• FWA systems: DECT, PHS
• UPCS systems: PCI, PACS-UA, PACS-UB, PWT (the Etiquette Rules allow us to perform

a common analysis, treating all the UPCS systems as a common technology)

1.3. BACKGROUND

Before the creation of this Experts Group, several individual contributions were presented to
CITEL PCC.III by CITEL members. These contributions attempted to highlight interference
issues, however, they used different assumptions and therefore the Experts Group was created to
quantify interference using a consistent set of parameters, assumptions and methodologies.

This Experts Group met three times coinciding with the CITEL PCC.III meetings in Cartagena de
Indias, Brasilia and Mexico City. They have also conducted 5 audio teleconferences as well as
numerous e-mail exchanges.

2. PCS-PCS AND PCS-FWA CASE

2.1. METHODOLOGY AND PARAMETERS

This section provides the methodology and parameters for the analysis of PCS-PCS and PCS-
FWA coexistence in adjacent frequency bands.

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