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Advanced Signal Processing for Cognitive Radio Networks

  1. Research Article

    Time-Delay Estimation in Dispersed Spectrum Cognitive Radio Systems

    Time-delay estimation is studied for cognitive radio systems, which facilitate opportunistic use of spectral resources. A two-step approach is proposed to obtain accurate time-delay estimates of signals that o...

    Fatih Kocak, Hasari Celebi, Sinan Gezici, Khalid A. Qaraqe, Huseyin Arslan and H. Vincent Poor

    EURASIP Journal on Advances in Signal Processing 2010 2010:675959

    Published on: 23 February 2010

  2. Research Article

    Optimal Policy of Cross-Layer Design for Channel Access and Transmission Rate Adaptation in Cognitive Radio Networks

    In this paper, we investigate the cross-layer design of joint channel access and transmission rate adaptation in CR networks with multiple channels for both centralized and decentralized cases. Our target is t...

    Hao He, Jun Wang, Jiang Zhu and Shaoqian Li

    EURASIP Journal on Advances in Signal Processing 2010 2010:305145

    Published on: 12 January 2010

  3. Review Article

    A Review on Spectrum Sensing for Cognitive Radio: Challenges and Solutions

    Cognitive radio is widely expected to be the next Big Bang in wireless communications. Spectrum sensing, that is, detecting the presence of the primary users in a licensed spectrum, is a fundamental problem fo...

    Yonghong Zeng, Ying-Chang Liang, Anh Tuan Hoang and Rui Zhang

    EURASIP Journal on Advances in Signal Processing 2010 2010:381465

    Published on: 6 January 2010

  4. Research Article

    A Unified Approach to Optimal Opportunistic Spectrum Access under Collision Probability Constraint in Cognitive Radio Systems

    We consider a cognitive radio system with one primary channel and one secondary user, and then we introduce a channel-usage pattern model and a fundamental access scheme in this system. Based on this model and...

    Qinghai Xiao, Yunzhou Li, Xiaofeng Zhong, Xibin Xu and Jing Wang

    EURASIP Journal on Advances in Signal Processing 2009 2010:148698

    Published on: 28 December 2009

  5. Research Article

    Uplink User Signal Separation for OFDMA-Based Cognitive Radios

    Spectrum awareness of orthogonal frequency division multiple access- (OFDMA-) based cognitive radios (CRs) can be improved by enabling them to separate the primary user signals in the uplink (UL). Assuming ava...

    MustafaE Şahin, Ismail Guvenc and Hüseyin Arslan

    EURASIP Journal on Advances in Signal Processing 2009 2010:502369

    Published on: 13 December 2009

  6. Research Article

    Spectral Correlation of Multicarrier Modulated Signals and Its Application for Signal Detection

    Spectral correlation theory for cyclostationary time-series signals has been studied for decades. Explicit formulas of spectral correlation function for various types of analog-modulated and digital-modulated ...

    Haijian Zhang, Didier Le Ruyet (EURASIPMember) and Michel Terré

    EURASIP Journal on Advances in Signal Processing 2009 2010:794246

    Published on: 13 December 2009

  7. Research Article

    Securing Collaborative Spectrum Sensing against Untrustworthy Secondary Users in Cognitive Radio Networks

    Cognitive radio is a revolutionary paradigm to migrate the spectrum scarcity problem in wireless networks. In cognitive radio networks, collaborative spectrum sensing is considered as an effective method to im...

    Wenkai Wang, Husheng Li, Yan(Lindsay) Sun and Zhu Han

    EURASIP Journal on Advances in Signal Processing 2009 2010:695750

    Published on: 22 November 2009

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