Energy Detection of DVB-T Signals Against Noise Uncertainty
Energy Detection of DVB-T Signals Against Noise Uncertainty
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DOI：
10.1109/lcomm.2014.2347278
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发表时间：
2014-08
期刊：
影响因子：
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通讯作者：
Ming Jin;Qinghua Guo;Jun Tong;J. Xi;Youming Li
中科院分区：
文献类型：
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作者：
Ming Jin;Qinghua Guo;Jun Tong;J. Xi;Youming Li
在这封信中，我们认为频谱感知的数字视频广播地面（DVB-T）信号与能量检测（艾德）。艾德在低计算复杂度的检测器中提供了上级性能，但是它容易受到噪声不确定性的影响。利用DVB-T信号导频的周期性，提出了一种低复杂度的噪声功率估计器，该估计器工作在多径信道中，不需要时间和频率同步。仿真结果表明，在噪声功率估计的情况下，艾德检测的性能明显优于DVB-T频谱感知中常用的基于导频相关的检测。
In this letter, we consider the spectrum sensing of digital video broadcasting-terrestrial (DVB-T) signals with energy detection (ED). ED delivers a superior performance among low computational complexity detectors, but it is vulnerable to noise uncertainty. By exploiting the pilot periodicity in DVB-T signals, we propose a low complexity noise power estimator which works in multipath channels, and does not require time and frequency synchronization. Simulations show that, with the noise power estimator, ED significantly outperforms the pilot correlation-based detection which is often used in DVB-T spectrum sensing.