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Fast-tracking delay-locked loop for UWB communication systems

机译:UWB通信系统的快速跟踪延迟锁定环

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Maintaining the synchronization between receiver and transmitter in the presence of Doppler effect is considered as a major challenge for ultra-wideband (UWB) communication systems. Delay-Locked Loop (DLL) method is widely proposed to keep the satisfactory synchronization. In this paper, we modify the structure of DLL, using Internal Model Control (IMC). Unfortunately, primary simulation results confirm that the IMC-DLL has a high opportunity to lose tracking in the presence of Doppler effect. In order to solve this problem, we develop the IMC tracking structure by adding an adaptive filter block, which has a simple structure: one addition and one division operators. The simulation results confirm that the proposed IMC-DLL has better transient response, compared with the classical DLL.
机译:在存在多普勒效应的情况下维持接收机和发射机之间的同步被认为是超宽带(UWB)通信系统的主要挑战。为了保持令人满意的同步,广泛提出了延迟锁定环(DLL)方法。在本文中,我们使用内部模型控制(IMC)修改DLL的结构。不幸的是,主要的仿真结​​果证实,在存在多普勒效应的情况下,IMC-DLL很有可能失去跟踪。为了解决这个问题,我们通过添加自适应滤波器块来开发IMC跟踪结构,该结构具有简单的结构:一个加法运算符和一个除法运算符。仿真结果证实,与经典的DLL相比,本文提出的IMC-DLL具有更好的瞬态响应。

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