基于Hermite函数设计UWB脉冲的算法

Algorithms of Designing UWB Pulse Based on Hermite Function

由于UWB信号占据的带宽极宽,不可避免地重叠在现有窄带无线通信系统的频段上。为了不干扰其他窄带通信系统,UWB脉冲不仅应具有平坦的频谱且无直流分量,而且其频谱形状也必须满足相应的频谱规划,因此设计满足频谱要求的脉冲是UWB通信系统中一个至关重要的问题。研究了Hermite脉冲的特征,依据其特征提出设计UWB脉冲的算法,用这些脉冲可以构造一个M-ary通信系统。

As UWB signal occupies extremely broad bandwidth, it inevitably overlays existing narrow-band services. In order to coexist with other narrow communication systems, UWB pulse should not only have a nearly flat frequency domain spectrum and no DC component, but also its spectral shape must meet the corresponding requirement. So, design of pulse meeting spectral requirement is of very importance in UWB communication system. The characteristic of Hermite pulse are firstly studied in this paper, then a new pulse design algorithm to generate UWB pulse is proposed based on its characteristics. M-ary communication system is constructed using these pulses.