通信工程文献翻译——摘要

在本文中，是关于满足UWB定义和频谱屏蔽的室内和室外限制的简单波形的研究。研究了矩形通带，调制矩形，调制高斯，矩形双峰，高斯单峰和高斯单轮波形。显示了每个优化波形的PSD和参数。优化结果在结论中讨论。

1.引言

最近，超宽带（UWB）无线电技术已经成为微波通信的一个重要课题，因为它低成本和低功耗的特性[1]。UWB与其他射频（RF）技术不同。代替使用窄行载波频率，UWB发射功率脉冲频谱密度（PSD）在超宽频谱范围内。美国的联邦通信委员会（FCC）[2]规定UWB的频率频谱范围从3.1到10.6 GHz。FCC将UWB信号定义为具有大于0.20的分数带宽或者占据大于500MHz的带宽的信号。分数和占用带宽被定义为

分数带宽=   (1)

占用带宽=  (2)

其中和分别是-10 dB点处的下限和上限频率。

因为它的功率谱低于第15部分的噪声限制，UWB信号的功率密度被认为是其他通信系统的噪声。 UWB接收器收集接收信号的功率以重建脉冲。 因此，UWB无线电技术可以与其他RF技术共存而没有干扰。

许多UWB波形[3] 已经被提出了。对波形设计进行了审查，但没有考虑FCC规定的UWB定义和频谱掩模。有用于设计UWB波形的迈恩技术，如通过使用埃尔米特函数[4]-[5]和扁长椭球波函数[6]。数值技术也可用于设计UWB波形[7]-[8]。 虽然波形在设计的频率范围内具有非常高的有效频谱，但是这些技术的算法比较复杂。

在本文中，简单波形满足UWB定义和室内和室外极限的频谱屏蔽。 研究了矩形通带，调制矩形，调制高斯，矩形双峰，高斯单峰和高斯单轮波形。 它们针对3.1至10.6 GHz......

ABSTRACT

In this paper, the simple waveform is satisfied the UWB definition and spectral masks for the indoor and outdoor limits. The rectangular passband, modulated rectangular,modulated Gaussian, rectangular doublet, Gaussian doublet and Gaussian monocycle waveforms are considered.The PSD and parameters of each optimized waveforms are showed. The optimized results are discussed in the conclusion.

1. INTRODUCTION

Recently, ultra wideband (UWB) radio technology has become an important topic for microwave communication because its potential is low cost and low power consumption properties [1]. UWB is different from other radio frequency (RF) technologies. Instead of using a narrow carrier frequency, UWB transmits pulses of power spectral density (PSD) in the range of the ultra wide frequency spectrum. The Federal Communication Commission (FCC) [2] in US specified that UWB has a frequency spectrum ranging from 3.1 to 10.6 GHz. The FCC defined the UWB signal as those which have a fractional bandwidth greater than 0.20 or occupies bandwidth greater than 500 MHz. The fractional and occupies bandwidth are defined as Fractional bandwidth = 2(fH ? fL) fH + fL , (1)

Occupies bandwidth = fH ? fL, (2)

where fL and fH are the lower and upper frequencies at the -10 dB point, respectively.The power density of the UWB signal is considered to be noise for other communication systems because its.......