IMPROVING INTERFERENCE IMMUNITY OF SPATIAL EVENT DETECTION SYSTEMUSING ARRAY ANTENNA

Hiroyuki Tsuji, Miho Koshikawa, Mikio Suzuki

Abstract

This paper proposes new techniques for improving the co-channel interference immunity of the event detection system which realizes indoor event detection scheme. Similar to the conventional methods the signal subspace-based approach sometimes suffers from interference in the same frequency band because the interference signals with different incident angles affect the signal subspace of the received signals at the receiving array antenna. Two types of new event detection methods are proposed to realize immunity against noise and interference in this paper. The first method proposed in this paper exploits the cyclostationarity of communication signals to distinguish the desired signal from the interference and suppresses noise and interfering signals without major hardware design changes. Another approach that improves immunity against co-channel interference is to utilize the transmission control scheme used for personal area network systems. In the proposed method of the study, carrier sense multiple access with collision avoidance (CSMA/CA) technique is utilized to distinguish the desired signal from the other transmitted signals. As a result of the detection of the presence of signals from other stations, the proposed system can avoid the transmitted interference signals from other systems. We are also developing an evaluation equipment to confirm the effectiveness of the proposed approach.

References

  1. Ikeda S., Tsuji H., and Ohtsuki T., 2009, Indoor Event Detection with Eigenvector Spanning Signal Subspace for Home or Office Security, in IEICE Trans. on Commun., vol. E92-B, no. 7, pp. 2406-2412, July 2009.
  2. Tsuji H., Koshikawa M., and Suzuki M., 2011, Cyclostationarity-Based Spatial Event Detection Using Signal Subspace of Array Antenna, In Proc. of the 14th Wireless Personal Multimedia Communications Symposium (WPMC'11), Brest, France, 3-7, Oct. 2011.
  3. Gardner W. A., 1994, Cyclostationarity in Communications and Signal Processing, IEEE, New York.
  4. Gardner W. A., 1988, Simplification of MUSIC and ESPRIT by exploitation of cyclo-stationarity, In Proc. IEEE, vol. 76, no.7, pp. 845-847.
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Paper Citation


in Harvard Style

Tsuji H., Koshikawa M. and Suzuki M. (2012). IMPROVING INTERFERENCE IMMUNITY OF SPATIAL EVENT DETECTION SYSTEMUSING ARRAY ANTENNA . In Proceedings of the First International Conference on Telecommunications and Remote Sensing - Volume 1: ICTRS, ISBN 978-989-8565-28-0, pages 105-111. DOI: 10.5220/0005414701050111


in Bibtex Style

@conference{ictrs12,
author={Hiroyuki Tsuji and Miho Koshikawa and Mikio Suzuki},
title={IMPROVING INTERFERENCE IMMUNITY OF SPATIAL EVENT DETECTION SYSTEMUSING ARRAY ANTENNA},
booktitle={Proceedings of the First International Conference on Telecommunications and Remote Sensing - Volume 1: ICTRS,},
year={2012},
pages={105-111},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005414701050111},
isbn={978-989-8565-28-0},
}


in EndNote Style

TY - CONF
JO - Proceedings of the First International Conference on Telecommunications and Remote Sensing - Volume 1: ICTRS,
TI - IMPROVING INTERFERENCE IMMUNITY OF SPATIAL EVENT DETECTION SYSTEMUSING ARRAY ANTENNA
SN - 978-989-8565-28-0
AU - Tsuji H.
AU - Koshikawa M.
AU - Suzuki M.
PY - 2012
SP - 105
EP - 111
DO - 10.5220/0005414701050111