Zhen Yang

Publications (2)0 Total impact

• Article: Multi-channel transmission strategy for dynamic spectrum access

  Yingxiao Wu, Zhen Yang
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  ABSTRACT: Cognitive radio is a promising technology that deals with the scarcity of radio spectrum. In this paper, we propose a new multi-channel transmission strategy for dynamic spectrum access in cognitive radio network. Starting with the model of spectrum activities, we present the multi-channel transmission strategy which has primary user’s protection mechanism to improve the spectrum efficiency and study its performance under perfect and imperfect sensing. Numerical example results reveal that the performance of the proposed strategy has the superiority with respect to capacity performance of cognitive users and the protection of primary users. Key wordsTransmission strategy-Dynamic spectrum access-Multiple channe
  Journal of Electronics (China) 05/2012; 27(3):345-352.
• Article: Coexistence of primary users and secondary users under interference temperature and SINR limit

  Yingxiao Wu, Zhen Yang
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  ABSTRACT: Spectrum sharing offers the opportunity for promising efficiency gains, and it will be a valuable tool in the era of future radios. To address this issue, we develop a multi-user cognitive radio sharing network based on opportunistic spectrum access and propose a new spectrum sharing strategy. The objective of our interest is to obtain the number of secondary users who can coexist peacefully with primary users to improve the utility of licensed spectrum, at the same time maximize the total goodput under the interference temperature and SINR constraints. Through analysis and simulation, the new strategy of spectrum sharing does improve the goodput performance as well as guarantee the Quality of Service (QoS) of primary and secondary users.
  Journal of Electronics (China) 04/2012; 26(3):303-311.