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Motivated by the fact that wideband spectrum sensing is critical for reliably finding spectral opportunities and achieving opportunistic spectrum access for generation cellular networks, we made a brief survey of the state-of-the-art wideband spectrum sensing algorithms

Wideband spectrum sensing for cognitive radio networks: a survey

IEEE Wireless Commun., no. 2 (2013): 74-81

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摘要

Cognitive radio has emerged as one of the most promising candidate solutions to improve spectrum utilization in next generation cellular networks. A crucial requirement for future cognitive radio networks is wideband spectrum sensing: secondary users reliably detect spectral opportunities across a wide frequency range. In this article, va...更多

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重点内容
  • Radio frequency (RF) spectrum is a valuable but tightly regulated resource due to its unique and important role in wireless communications
  • New spectrum policies are being developed by the Federal Communications Commission (FCC) that will allow secondary users to opportunistically access a licensed band, when the primary user (PU) is absent
  • Since cognitive radios are considered as secondary users for using the licensed spectrum, a crucial requirement of cognitive radio networks is that they must efficiently exploit under-utilized spectrum without causing harmful interference to the PUs
  • While present narrowband spectrum sensing algorithms have focused on exploiting spectral opportunities over narrow frequency range, cognitive radio networks will eventually be required to exploit spectral opportunities over wide frequency range from hundreds of megahertz (MHz) to several gigahertz (GHz) for achieving higher opportunistic throughput
  • OPEN RESEARCH CHALLENGES we identify the following research challenges that need to be addressed for implementing a feasible wideband spectrum sensing device for future cognitive radio networks
  • Motivated by the fact that wideband spectrum sensing is critical for reliably finding spectral opportunities and achieving opportunistic spectrum access for generation cellular networks, we made a brief survey of the state-of-the-art wideband spectrum sensing algorithms
表格
  • Table1: SUMMARY OF ADVANTAGES AND DISADVANTAGES OF NARROWBAND SPECTRUM SENSING ALGORITHMS
  • Table2: SUMMARY OF ADVANTAGES, DISADVANTAGES, AND CHALLENGES OF WIDEBAND SPECTRUM SENSING ALGORITHMS
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基金
  • Nallanathan acknowledge the support of the UK Engineering and Physical Sciences Research Council (EPSRC) with Grant No EP/I000054/1
  • Wang acknowledges the support from the RCUK for the UK-China Science Bridges Project: R&D on (B)4G Wireless Mobile Communications, the Key Laboratory of Cognitive Radio and Information Processing (Guilin University of Electronic Technology), Ministry of Education, China (Grant No.: 2011KF01), the Fundamental Research Program of Shenzhen City (Grant No JCYJ20120817163755061), and SNCS research center at University of Tabuk under the grant from the Ministry of Higher Education in Saudi Arabia
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