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Application Note AN042 CC2431 Location Engine By K. Aamodt 1 KEYWORDS • CC2430 • ZigBee • CC2431 • Location Engine 2 INTRODUCTION This document describes the location The main purposes of this document it to engine implemented in the CC2431. present some basic aspects of the location CC2431 is a ZigBee system on chip, so it technology, and provide some hints and will be natural to use the location engine in tips for easy developing of systems using a ZigBee network. This manual is written the CC2431 location engine. This to be as general as possible and will not document should be read as an extension describe any protocol specific to the CC2431 and CC2430 data sheets. considerations. Application Note AN042 (Rev. 1.0) SWRA095 Page 1 of 20
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【资料目录】
KEYWORDS
INTRODUCTION
LOCATION ENGINE
Node types
Reference node
Blind Node
The location hardware
Input
Output
RECEIVED SIGNAL STRENGTH INDICATOR (RSSI)
Offset
Linearity
Theoretical signal propagation
RSSI – Practical considerations
Simple ways to filter the RSSI values
Calculated RSSI vs. measured RSSI
DIFFERENT PARAMETERS – INFLUENCE
A – RSSI value measured one meter from the sender
Measuring A
A versus calculated position
N – Signal propagation coefficient
Measuring n
Number of reference nodes
SOFTWARE ALGORITHMS
Selection of “best” reference nodes
Extension of the covered area
Level/ floor indication
CONTROL SYSTEM/ CENTRAL
GENERAL INFORMATION
Document History
【资料预览】Application Note AN042 CC2431 Location Engine By K. Aamodt 1 KEYWORDS • CC2430 • ZigBee • CC2431 • Location Engine 2 INTRODUCTION This document describes the location The main purposes of this document it to engine implemented in the CC2431. present some basic aspects of the location CC2431 is a ZigBee system on chip, so it technology, and provide some hints and will be natural to use the location engine in tips for easy developing of systems using a ZigBee network. This manual is written the CC2431 location engine. This to be as general as possible and will not document should be read as an extension describe any protocol specific to the CC2431 and CC2430 data sheets. considerations. Application Note AN042 (Rev. 1.0) SWRA095 Page 1 of 20
