The Cognitive Radio paradigm for Ultra-Wideband systems: The European Project EUWB

Giorgetti, Andrea; Chiani, Marco; Dardari, Davide; Piesiewicz, Radoslaw; Bruck, Guido H.

doi:10.1109/icuwb.2008.4653378

Cited by 19 publications

(11 citation statements)

References 7 publications

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“…where J ττ is still as in (10). Comparison with (28) reveals that the conditional bound is equal or less than the joint bound.…”

Section: B Conditional Boundingmentioning

confidence: 99%

“…Its main feature is a fine delay resolution property that is exploited for estimating the time-of-arrival (TOA) of the first path signal [8], [9]. Especially in its multicarrier version [10], UWB is also well-suited for CR applications as an underlay technology thanks to its intrinsic capability to perform wideband sensing and adapt its transmitted spectrum shape.…”

Section: Introductionmentioning

confidence: 99%

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Performance Limits on Ranging with Cognitive Radio

Dardari

Karisan

Gezici

et al. 2009

2009 IEEE International Conference on Communications Workshops

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Abstract-Cognitive radio is a promising paradigm for efficient utilization of the radio spectrum due to its capability to sense environmental conditions and adapt its communication and localization features. In this paper, the theoretical limits on time-of-arrival estimation for cognitive radio localization systems are derived in the presence of interference. In addition, an optimal spectrum allocation strategy which provides the best ranging accuracy limits is proposed. The strategy accounts for the constraints from the sensed interference level as well as from the regulatory emission mask. Numerical results are presented to illustrate the improvements that can be achieved by the proposed approach.Index Terms-Ranging, time-of-arrival (TOA) estimation, cognitive radio, interference, ultra-wideband (UWB), orthogonal frequency division multiplexing (OFDM).

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“…where J ττ is still as in (10). Comparison with (28) reveals that the conditional bound is equal or less than the joint bound.…”

Section: B Conditional Boundingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Limits on Ranging with Cognitive Radio

Dardari

Karisan

Gezici

et al. 2009

2009 IEEE International Conference on Communications Workshops

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“…To design the direct sequence (DS) or the TH sequence in UWB signal is an effective approach to shape the UWB signal spectrum. Based on conclusions from [11], a delicate DS can suppress the narrowband interference on certain bands to some extent. Moreover, their mutual interference is immensely mitigated.…”

Section: Introductionmentioning

confidence: 99%

Ultra-wideband direct-sequence design approach for multiple narrowband interference suppression

Guo

Shi³

2013

J. of Syst. Eng. Electron.

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A novel direct sequence (DS) design method for suppressing the narrowband interference in DS spread spectrum ultra-wideband receivers is proposed. The method has low computational complexity and can be easily implemented in practical systems. Simulation results prove that the proposed method is effective to suppress the narrowband interference. Therefore, the integrity of both the ultra-wide bandwidth and the narrowband systems can be highly enhanced.Keywords: bit error rate (BER), narrowband interference, Rayleigh-Ritz, direct sequence (DS).

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“…The three first sub-bands form the so-called Mode 1 band group (3.1-4.8 GHz also known as band group (BG) 1) [4]- [8]. In Europe the 6-8.5 GHz has received a lot of attention, with an in future possible extension to 9 or 10.6 GHz [9]- [10].…”

Section: Introductionmentioning

confidence: 99%

“…Various legal respiratory around the world has adopted additional constraints on the use of the UWB frequency-band [8]- [10]. There is one based on the direct sequence spread spectrum technique [4], [7]- [8].…”

Section: Introductionmentioning

confidence: 99%

Circular dipole antennas for lower and upper UWB bands with integrated balun

Karlsson

Osth

Owais

et al. 2009

2009 IEEE International Conference on Ultra-Wideband

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Two fully integrated dipole antennas with balun for ultra-wideband (UWB) radio utilizing a flexible and rigid printed circuit board are presented in this paper. The concept in this paper is to take advantage of the respective possibilities of the rigid and the flexible part. The balun utilizes broadside-coupled microstrips and is integrated in the rigid part of the printed circuit board, while the radiator is placed in the flexible part. The lower UWB band antenna with the balun covers the frequency-band 3.1-4.8 GHz (with margin) at VSWR<2.0. The upper UWB band antenna with the balun covers the frequencyband 6.0-8.5 GHz (with margin) at VSWR<2.0, and 5.5-11.0 GHz at VSWR<2.5.

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The Cognitive Radio paradigm for Ultra-Wideband systems: The European Project EUWB

Cited by 19 publications

References 7 publications

Performance Limits on Ranging with Cognitive Radio

Performance Limits on Ranging with Cognitive Radio

Ultra-wideband direct-sequence design approach for multiple narrowband interference suppression

Circular dipole antennas for lower and upper UWB bands with integrated balun

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