Low-complexity blind synchronization and demodulation for (ultra-)wideband multi-user ad hoc access

Xiliang Luo; Georgios B. Giannakis

doi:10.1109/TWC.2006.1673104

Low-complexity blind synchronization and demodulation for (ultra-)wideband multi-user ad hoc access

Xiliang Luo, Georgios B. Giannakis

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

62 Scopus citations

Abstract

Synchronization is a performance-critical factor in most communication systems: from classical narrowband and emerging (ultra) wideband (UWB) point-to-point links to cooperative or ad hoc networking, where access must deal with multi-user interference (MUI) and possibly severe intersymbol interference (ISI). For universal applicability to all these scenarios, we develop a blind synchronization and demodulation scheme which relies on intermittent transmission of nonzero mean symbols. These enable MUI- and ISI-resilient timing acquisition via energy detection and low-complexity demodulation by matching to a synchronized aggregate template (SAT). The resultant SAT receiver offers distinct advantages over RAKE, has low-complexity and lends itself naturally to decision-directed enhancements. Its blind operation nicely fits the requirements of multi-user ad hoc access and its ability to handle ISI is particularly attractive for UWB communications. Analytical performance evaluation and simulations testing our novel scheme in UWB settings confirm its high potential for deployment.

Original language	English (US)
Article number	1673104
Pages (from-to)	1930-1941
Number of pages	12
Journal	IEEE Transactions on Wireless Communications
Volume	5
Issue number	7
DOIs	https://doi.org/10.1109/TWC.2006.1673104
State	Published - Jul 2006

Bibliographical note

Funding Information:
Manuscript received September 30, 2004; revised February 10, 2005; accepted February 21, 2005. The associate editor coordinating the review of this paper and approving it for publication was G. Vitetta. This work was supported through collaborative participation in the Communications and Networks Consortium sponsored by the U. S. Army Research Laboratory under the Collaborative Technology Alliance Program, Cooperative Agreement DAAD19-01-2-0011. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation thereon.

Keywords

Ad hoc multiple access
Blind receivers
Synchronization
Timing offset estimation
Ultra-Wideband (UWB)
Wireless sensor networks

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10.1109/TWC.2006.1673104

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abstract = "Synchronization is a performance-critical factor in most communication systems: from classical narrowband and emerging (ultra) wideband (UWB) point-to-point links to cooperative or ad hoc networking, where access must deal with multi-user interference (MUI) and possibly severe intersymbol interference (ISI). For universal applicability to all these scenarios, we develop a blind synchronization and demodulation scheme which relies on intermittent transmission of nonzero mean symbols. These enable MUI- and ISI-resilient timing acquisition via energy detection and low-complexity demodulation by matching to a synchronized aggregate template (SAT). The resultant SAT receiver offers distinct advantages over RAKE, has low-complexity and lends itself naturally to decision-directed enhancements. Its blind operation nicely fits the requirements of multi-user ad hoc access and its ability to handle ISI is particularly attractive for UWB communications. Analytical performance evaluation and simulations testing our novel scheme in UWB settings confirm its high potential for deployment.",

keywords = "Ad hoc multiple access, Blind receivers, Synchronization, Timing offset estimation, Ultra-Wideband (UWB), Wireless sensor networks",

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note = "Funding Information: Manuscript received September 30, 2004; revised February 10, 2005; accepted February 21, 2005. The associate editor coordinating the review of this paper and approving it for publication was G. Vitetta. This work was supported through collaborative participation in the Communications and Networks Consortium sponsored by the U. S. Army Research Laboratory under the Collaborative Technology Alliance Program, Cooperative Agreement DAAD19-01-2-0011. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation thereon.",

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N2 - Synchronization is a performance-critical factor in most communication systems: from classical narrowband and emerging (ultra) wideband (UWB) point-to-point links to cooperative or ad hoc networking, where access must deal with multi-user interference (MUI) and possibly severe intersymbol interference (ISI). For universal applicability to all these scenarios, we develop a blind synchronization and demodulation scheme which relies on intermittent transmission of nonzero mean symbols. These enable MUI- and ISI-resilient timing acquisition via energy detection and low-complexity demodulation by matching to a synchronized aggregate template (SAT). The resultant SAT receiver offers distinct advantages over RAKE, has low-complexity and lends itself naturally to decision-directed enhancements. Its blind operation nicely fits the requirements of multi-user ad hoc access and its ability to handle ISI is particularly attractive for UWB communications. Analytical performance evaluation and simulations testing our novel scheme in UWB settings confirm its high potential for deployment.

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Low-complexity blind synchronization and demodulation for (ultra-)wideband multi-user ad hoc access

Abstract

Bibliographical note

Keywords

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