On the Nonlinear Teager-Kaiser Operator for Energy Detection Based Impulse Radio UWB Receivers
On the Nonlinear Teager-Kaiser Operator for Energy Detection Based Impulse Radio UWB Receivers
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DOI：
10.1109/glocom.2012.6503755
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发表时间：
2012-12
影响因子：
10.4
通讯作者：
Zhimeng Xu;H. Nie;Z. Chen;Hassan Khani;Lun Yu
中科院分区：
文献类型：
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作者：
Zhimeng Xu;H. Nie;Z. Chen;Hassan Khani;Lun Yu
本文通过将窄带干扰建模为广义平稳的零均值高斯带通随机过程，首次建立了一个系统的理论框架来描述基于能量检测（艾德）的脉冲无线电超宽带（IR-UWB）接收机的工作和性能改进，该接收机采用非线性Teager-Kaiser算子（TKO）和高通滤波器。此外，通过理论分析和仿真，我们已经确定：（1）TKO技术不仅可以有效地减轻NBI引起的性能下降，而且还可以有效地减轻由加性白色高斯噪声引起的性能下降，以及（2）UWB信号的较大带宽导致更好的缓解。因此，TKO技术被认为是一个非常有前途的技术，以提高整体性能的ED为基础的IR-UWB接收机无论NBI存在与否。
In this paper, by modeling a narrowband interference (NBI) as a wide-sense stationary (WSS), zero-mean Gaussian bandpass random process, a systematic theoretical framework is developed for the first time to characterize the operation and performance improvement of energy detection (ED) based impulse radio ultra-wideband (IR-UWB) receivers that employ a nonlinear Teager-Kaiser operator (TKO) and a highpass filter. Furthermore, through both theoretical analysis and simulations, we have identified (1) that the TKO technique can effectively mitigate not only the performance degradation caused by an NBI but also that caused by additive white Gaussian noise and (2) that a larger bandwidth of the UWB signal leads to better mitigation. Therefore, the TKO technique is considered as a very promising technique to improve the overall performance of ED-based IR-UWB receivers no matter an NBI is present or not.