The Journal of the Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회논문지)

The Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회)
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New Method of Cooperative Spectrum Sharing for Interference Mitigation

간섭 완화를 위한 새로운 협력 스펙트럼 공유 기법

  • 공형윤 (울산대학교 전기전자정보시스템공학부)
  • Received : 2014.09.24
  • Accepted : 2015.02.13
  • Published : 2015.02.28
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Abstract

This article considers a model of cooperative spectrum sharing between primary and secondary systems in which transmission occurs in two phases. In this scheme, we introduce that a single secondary transmitter, ST, employs a quadrature-phase-based signal to present the secondary message, while the primary message is presented by an in-phase-based signal. This allows simultaneous spectrum sharing without mutual interference. Therefore, an interference constraint is not necessary to protect primary operating performance from being degraded by the secondary user operations. Theoretical analysis and Simulations are then provided to confirm the superiority of the proposed scheme over the the current conventional methods.

본 논문은 인지 통신의 1차, 2차 시스템 사이에서 발생되는 협력 스펙트럼 공유 모델을 고려한다. 제시된 모델은 동상 신호로 표현되는 1차 사용자의 메시지가 존재할 때, 직교 위상 기반의 신호인 2차 사용자의 메시지가 존재하기 위한 단일 2차 송신기 ST의 배치에 대해 표현한다. 상호 간섭이 없는 순간적인 스펙트럼 공유로 가정하였으므로, 2차 사용자의 동작으로 인한 1차 사용자의 동작을 보호하는 것은 불필요하다. 또한 1차 시스템의 신호, 2차 시스템의 신호가 동상 및 직교 위상인 직교 차원에 위치하는 것을 기반으로 하기 때문에, 1차 시스템과 2차 시스템의 신호는 상호 간섭이 발생하지 않으며 2차 시스템 전원의 일부를 사용하여 1차 시스템의 신호를 강화시킬 수 있다.

Keywords

References

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