Spectrum sensing has been identified as a key enabling functionality to ensure that cognitive radios would not interfere with primary users, by reliably detecting primary user signals. Recent research studied spectrum sensing using energy detection and network cooperation via modeling and simulations. However, there is a lack of experimental study that shows the feasibility and practical performance limits of this approach under real noise and interference sources in wireless channels. In this work, we implemented energy detector on a wireless testbed and measured the required sensing time needed to achieve the desired probability of detection and false alarm for modulated and sinewave-pilot signals in low SNR regime. We measured the minimum detectable signal levels set by the receiver noise uncertainties. Our experimental study also measured the sensing improvements achieved via network cooperation, identified the robust threshold rule for hard decision combining and quantified the effects ofspatial separation between radios in indoor environments.
频谱感测已被确认为关键功能,可通过可靠地检测主要用户信号来确保认知无线电不会干扰主要用户。最近的研究使用能量检测以及通过建模和仿真的网络协作研究了频谱感测。但是,缺乏实验研究来表明这种方法在无线信道中的实际噪声和干扰源下的可行性和实际性能限制。在这项工作中,我们在无线测试平台上实现了能量检测器,并测量了在低SNR情况下为调制和正弦波导频信号实现所需的检测概率和虚警所需的感应时间。我们测量了由接收机噪声不确定性确定的最小可检测信号电平。我们的实验研究还测量了通过网络合作实现的感知改善,确定了用于硬决策组合的鲁棒阈值规则,并量化了室内环境中无线电之间的空间分隔效果。 P>
Berkeley Wireless Research Center, Berkeley, CA;
机译:BLSBA-ED-SSO:基于双变量Levy稳定bat算法的能量检测,用于认知无线电网络(CRN)中的频谱感知优化
机译:关于认知无线电网络能量检测频谱感测的新数学模型
机译:认知无线电无线传感器网络中使用低延迟列位压缩(LLCBC)MAC的基于能量检测的SoC架构
机译:基于自适应阈值的结合能量和频谱宽度检测的认知网络,使用USRP B200 GNU无线电进行RF信道检测:一项实验研究
机译:改善无线认知无线电网络中的频谱感知和多用户合作。
机译:认知合作网络的增强范例:一对一能量和频谱双重合作
机译:基于能量检测和网络协作的频谱感知实验研究