Interference‐resilient spectrum sharing with collision detection and data recovery for cognitive radio networks,International Journal of Communication Systems

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Interference‐resilient spectrum sharing with collision detection and data recovery for cognitive radio networks
International Journal of Communication Systems ( IF 1.7 ) Pub Date : 2020-04-27 , DOI: 10.1002/dac.4432
Imran Javed ₁ , Asim Loan ₂ , Waqar Mahmood ₃

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Data recovery under collision of primary/secondary users in cognitive radio networks is largely an unaddressed problem. Existing approaches require either (a) retransmissions, (b) interference‐free alignment of transmission parameters, or (c) prior knowledge for data recovery. In contrast to the existing approaches, the paper proposes estimation of channel state information based on received collided frames and recommends techniques for spectrum sharing, collision detection, and data recovery. Specifically, based on estimated channel vector, interference‐resilient spectrum‐sharing protocol and techniques are proposed for (a) identification of primary user (PU) activity before (or during) secondary user's (SU's) transmission, (b) MIMO channel estimation under collision, (c) optimal pilot permutation, and (d) interference cancellation (with/without receiver diversity). Results are reported for different baseband modulation techniques under frequency selective/flat fading channel scenarios that demonstrate the efficacy of a proposed work.

中文翻译：

认知无线电网络中具有冲突检测和数据恢复的抗干扰频谱共享

认知无线电网络中主要/次要用户冲突下的数据恢复在很大程度上是一个未解决的问题。现有方法需要（a）重传，（b）传输参数的无干扰对齐或（c）数据恢复的先验知识。与现有方法相反，本文提出了基于接收到的冲突帧的信道状态信息估计，并推荐了用于频谱共享，冲突检测和数据恢复的技术。具体而言，基于估计的信道向量，提出了抗干扰频谱共享协议和技术，用于（a）在次用户（SU）传输之前（或期间）识别主要用户（PU）活动，（b）在以下情况下的MIMO信道估计碰撞；（c）最佳导频排列；（d）干扰消除（有/无接收机分集）。报告了在频率选择/平坦衰落信道方案下使用不同基带调制技术的结果，这些结果证明了拟议工作的有效性。

更新日期：2020-04-27

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