Acquisition Performance Comparison of Energy Detector and Single-pulse Correlator for UWB Systems
Acquisition Performance Comparison of Energy Detector and Single-pulse Correlator for UWB Systems
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DOI：
10.1109/ciss.2007.4298288
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发表时间：
2007-03
期刊：
影响因子：
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通讯作者：
K. Bai;Ning He;C. Tepedelenlioğlu
中科院分区：
文献类型：
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作者：
K. Bai;Ning He;C. Tepedelenlioğlu
由于超宽带(UWB)信号的发射功率极低，有效的捕获对UWB系统来说是一项非常具有挑战性的任务。能量检测器(ED)不仅易于实现，而且可以合并多径能量，从而使捕获算法的信噪比(SNR)获得可能的增益。本文提出了一种用于捕获过程的两步随机搜索算法。在同一级上分析比较了单脉冲相关器方案和ED方案的捕获性能。结果表明，在相同的误捕率(FAR)约束下，ED方案的平均捕获时间(AAT)比单脉冲相关器方案快得多。
Efficient acquisition is a very challenge task for ultra-wideband (UWB) systems due to the extremely low transmission power of UWB signals. An energy detector (ED) is not only easy to implement in practice but also can combine the multipath energy, which in turn renders a possible gain in the signal-to-noise ratio (SNR) of the acquisition algorithm. In this paper, we propose a two-step random search algorithm for the acquisition process. The acquisition performances of single-pulse correlator schemes and ED schemes are analyzed and compared over a common stage. The results show the ED scheme achieves a much faster average acquisition time (AAT) than the single-pulse correlator scheme does under the same false-acquisition rate (FAR) constraint.