Influence of the number of tags and their transmission period on the packet reception ratio in the ultrawideband localization system

Abstract

With the rising interest in the services that use the information regarding the position of people or objects in the indoor environment, development of systems capable of providing such data can be observed. Various techniques may be used, with radio-based systems being currently popular and promising. Especially, ultrawideband systems are recently getting more attention. In most cases they utilize TOA (Time of Arrival) or TDOA (Time Difference of Arrival) measurements which allows for achieving localization errors lower than in other radio systems. Time measurements imply that all anchor nodes that the system is comprised of, need to be synchronized. In most cases, when synchronization methods are being described, focus is placed on their accuracy, with their influence on other characteristics of the localization system being omitted. In the paper, two wireless synchronization methods are briefly described and their influence on the tags’ packet reception ratio is simulation-tested.