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Spectral shaping of UWB signals for time-hopping impulse radio

Nakache, YP and Molisch, Andreas LU (2006) In IEEE Journal on Selected Areas in Communications 24(4). p.738-744
Abstract
This paper studies the design of signaling waveforms for time-hopping impulse radio (TH-IR) with limits on the power spectral density. Such restrictions are imposed by the spectral mask prescribed by frequency regulators for ultra-wideband (UWB) signals. The "conventional" TH-IR system with pulse-position modulation and time-hopping multiple access gives rise to spectral lines that either violate the regulations, or require a significant power backoff. To remedy this situation, we propose the use of polarity randomization, which eliminates the spectral lines and also leads to a smoothing of the continuous part of the spectrum. We analyze different variants of the polarity randomization, considering short and long randomization sequences,... (More)
This paper studies the design of signaling waveforms for time-hopping impulse radio (TH-IR) with limits on the power spectral density. Such restrictions are imposed by the spectral mask prescribed by frequency regulators for ultra-wideband (UWB) signals. The "conventional" TH-IR system with pulse-position modulation and time-hopping multiple access gives rise to spectral lines that either violate the regulations, or require a significant power backoff. To remedy this situation, we propose the use of polarity randomization, which eliminates the spectral lines and also leads to a smoothing of the continuous part of the spectrum. We analyze different variants of the polarity randomization, considering short and long randomization sequences, as well as symbol-based or pulse-based randomization. We analyze the effect of this technique on both pulse position modulation and binary phase-shift keying modulation. (Less)
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author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
spectral lines, polarity randomization, power spectral density, time-hopping impulse radio (TH-IR)
in
IEEE Journal on Selected Areas in Communications
volume
24
issue
4
pages
738 - 744
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000236775900005
  • scopus:33947304787
ISSN
1558-0008
DOI
10.1109/JSAC.2005.863817
language
English
LU publication?
yes
id
0376de8d-ad89-4552-bdcd-918317ec965d (old id 414077)
date added to LUP
2016-04-01 16:57:40
date last changed
2021-02-17 01:06:55
@article{0376de8d-ad89-4552-bdcd-918317ec965d,
  abstract     = {This paper studies the design of signaling waveforms for time-hopping impulse radio (TH-IR) with limits on the power spectral density. Such restrictions are imposed by the spectral mask prescribed by frequency regulators for ultra-wideband (UWB) signals. The "conventional" TH-IR system with pulse-position modulation and time-hopping multiple access gives rise to spectral lines that either violate the regulations, or require a significant power backoff. To remedy this situation, we propose the use of polarity randomization, which eliminates the spectral lines and also leads to a smoothing of the continuous part of the spectrum. We analyze different variants of the polarity randomization, considering short and long randomization sequences, as well as symbol-based or pulse-based randomization. We analyze the effect of this technique on both pulse position modulation and binary phase-shift keying modulation.},
  author       = {Nakache, YP and Molisch, Andreas},
  issn         = {1558-0008},
  language     = {eng},
  number       = {4},
  pages        = {738--744},
  publisher    = {IEEE - Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Journal on Selected Areas in Communications},
  title        = {Spectral shaping of UWB signals for time-hopping impulse radio},
  url          = {http://dx.doi.org/10.1109/JSAC.2005.863817},
  doi          = {10.1109/JSAC.2005.863817},
  volume       = {24},
  year         = {2006},
}