Journal of the Institute of Electronics and Information Engineers (전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Identification of WLAN Signals Using the Difference in the Occupied Bandwidth

점유 대역폭 차이를 이용한 무선랜 신호 구별 방법

  • Lim, Chang Heon (Department of Electronic Engineering, Pukyong National University) ;
  • Kim, Hyung Jung (Radio Analysis Research Section, Electronics and Telecommunication Research Institute)
  • 임창헌 (부경대학교 전자공학과) ;
  • 김형중 (한국전자통신연구원 신호처리분석연구실)
  • Received : 2015.03.16
  • Accepted : 2015.08.26
  • Published : 2015.09.25
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Abstract

Recently, a lot of research effort has been directed toward spectrum sensing and identification of OFDM signals as the OFDM technique has been adopted for transmission in many wireless communications standards. Among them, two popular WLAN standards, IEEE 802.11a and IEEE 802.11n, have a very similar OFDM symbol structure in terms of the lengths of CP(cyclic prefix) and effective OFDM symbol and so it is not straightforward to distinguish them with existing spectrum sensing methods based on the difference in the parameters. In this paper, we present a spectrum sensing strategy for identifying them by exploiting the fact that they employ different bandwidths and examine its performance.

최근 OFDM 방식을 채택한 무선 전송 표준이 많아지면서 그에 대한 스펙트럼 센싱 및 식별에 대한 연구가 활발하게 전개되고 있다. OFDM 기반 무선랜 전송 방식 중에서 IEEE 802.11a와 IEEE 802.11n 방식은 OFDM 심볼이나 CP(cyclic prefix)의 길이 같은 OFDM 심볼 구조 측면에서 매우 유사하기 때문에 이런 파라미터의 차이를 활용하는 기존의 스펙트럼 센싱 방식으로는 두 가지 방식을 구분하기 어렵다. 본 논문에서는 두 가지 방식이 차지하는 주파수 대역폭이 다르다는 점에 착안하여 이들 전송 방식을 구분할 수 있는 방안을 제안하고 성능을 살펴본다.

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References

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