Activity recognition using array antenna

Yusuke Hino, Jihoon Hong, Tomoaki Ohtsuki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)


Nowadays, the population of elderly persons who live alone is increasing in Japan. Some systems are available to monitor those persons' activities, however, they have some limitations; physical burden and need to wear sensors. In our previous work, we have proposed a fall detection method using an array antenna. Array antenna is an antenna, which detects radio wave propagation by observing the direction of arrival (DOA) of the received signal. In the conventional method, it can only detect whether the activity is fall or not, so it is impossible to recognize which kind of non-fall activity the person does. In addition, the detection accuracy of the non-fall activity is not so high, because of the difficulty to detect the difference of fall and sit. In this paper, we propose an activity recognition system by using array antenna. We detect the person's activity (fall, walk, sit, and stand still). To improve the accuracy, we set thresholds for the continuous number of each activity, and correct the result which continues less than the threshold. Also, we use the state transition of the activity, and correct the impossible activity transition.

Original languageEnglish
Title of host publicationIEEE International Conference on Communications
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Print)9781467364324
Publication statusPublished - 2015 Sept 9
EventIEEE International Conference on Communications, ICC 2015 - London, United Kingdom
Duration: 2015 Jun 82015 Jun 12


OtherIEEE International Conference on Communications, ICC 2015
Country/TerritoryUnited Kingdom

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications


Dive into the research topics of 'Activity recognition using array antenna'. Together they form a unique fingerprint.

Cite this