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发表于 2008-10-24 16:07:23
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回复:UWB经典论文：Communication techniques using monopulse waveforms
原帖由yaoyaoer于2007-07-30 23:27发表:
Communication techniques using monopulse waveforms
以下为一般性资料发贴选项：
【资料成文时间】：1999
【语言】：英
【页数】：5
【何人（公司）所著】：J. T. Conroy
【文件格式】：pdf
【文件原名】：Communication techniques using monopulse waveforms
【摘要或目录】：Abstract-This paper studies wireless communication
systems using technology that does not require a carrier signal.
The vehicle used for transmission is a monopulse waveform.
Such waveforms possess a bandpass nature, having no DC
content. The short time duration of these waveforms, typically
in the order of nanoseconds, provides has an ultrawide,
bandpass characteristic, with a spectrum in the range of
hundreds of megahertz, making them ideally suited for a spread
spectrum communication system. The temporal representations
of several monopulse signals are illustrated, and the power
spectral densities of the Gaussian and Rayleigh monopulse
waveshapes are presented. The relationship between effective
time duration, peak-to-RMS value, and bandwidth is detailed.
The spectral effect of pulse amplitude modulated data and pulse
position modulated data is compared. A methodology for
efficient data transmission and a technique for rate doubling at
not cost in bandwidth is described. Diversity methods to
mitigate harsh environment, such as those encountered in fading
channels, jamming, and multipath situations, are introduced. A
discussion of the results concludes this paper. |
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