以认知无线电为核心的动态频谱共享接入作为解决万物智联时代频谱稀缺问题的关键技术之一，快速、鲁棒的频谱感知是动态接入的基础。优化改进一种基于能量检测的宽带频谱感知方法，在无需先验信息的情况下实现了快速频谱边界识别与信道状态判定。实验结果表明，本方法适用于宽频带频谱盲感知，且在低信噪比情况下具有良好的性能。
The explosive growth of traffic demand in the era of internet of everything has resulted in the spectrum scarcity, which enabled a rapid development of dynamic spectrum access technologies in cognitive radio (CR). Fast and robust spectrum sensing method is evoked as the base of dynamic access. We optimized a wide-band spectrum sensing method based on energy detection. The optimized method can implement spectrum edge detection and channel state determination fast without any prior information (bandwidth, power spectrum density, etc.). Results show that our method is suitable for the wide-band blind spectrum sensing, and has an acceptable performance in low SNR scenario.
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