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On the application of two dimensional chirplets for resilient digital image watermarking
(Signals and Systems Conference (ISSC 2013), 24th IET Irish, 2013-06)
Chirplets (swept-frequency harmonic signals) find applications in several areas, including real and synthetic aperture radar, (Fresnel) optics and image processing. The robustness of chirplets to extreme (additive) noise ...
Cooperatively extending the range of indoor localisation
(Signals and Systems Conference (ISSC 2013), 24th IET Irish, 2013-06)
Whilst access to location based information has been mostly possible in the outdoor arena through the use of GPS, the provision of accurate positioning estimations and broad coverage in the indoor environment has proven ...
Impact of DFT properties on the inherent resolution of compressed sensing reconstructed images
(Signals and Systems Conference (ISSC 2013), 24th IET Irish, 2013-06)
Compressed sensing (CS) algorithms exploit sparseness properties to reconstruct high spatial resolution magnetic resonance (MR) images from k-space data acquisitions significantly under sampled to reduce imaging times. CS ...
Towards shifted NMF for improved monaural separation
(Signals and Systems Conference (ISSC 2013), 24th IET Irish, 2013-06)
The ability of Non-negative Matrix Factorisation (NMF) to decompose magnitude spectrogram into meaningful entities has found use in many audio applications. NMF can be used to factorise audio spectrogram of a music signal ...
Linearity vs. power consumption of CMOS LNAs in LTE systems
(Signals and Systems Conference (ISSC 2013), 24th IET Irish, 2013-06)
This paper presents a study of linearity in wideband CMOS low noise amplifiers (LNA) and its relationship to power consumption in context of Long Term Evolution (LTE) system. Using proposed figure of merit to compare 35 ...
IEEE 802.15.4a UWB-IR ranging with bilateral transmitter power control methodology for multipath effects mitigation
(Signals and Systems Conference (ISSC 2013), 24th IET Irish, 2013-06)
IEEE 802.15.4a Ultra Wideband Impulse Radio (UWB-IR) measures the distance using the time-of-arrival (TOA) of the leading path signal. Multipath propagation in indoor environments can adversely affect the signal to noise ...
Modeling user behaviour in response to cyberthreats
(IET CONFERENCE PUBLICATIONS, 2013-06)
Considerable challenges exist for the average computer user, organizations and indeed governmental agencies with the advent and evolution of threats directed against the computer user today. Combating cyberthreats has not ...
Comparing and contrasting smartphone and non-smartphone usage
(Signals and Systems Conference (ISSC 2013), 24th IET Irish, 2013-06)
This paper presents a large-scale network wide analysis of both user behaviour and network dynamics in a live nationwide 2G/3G network. The employed data set tracks over one million subscribers across upwards of ten thousand ...
Phase noise analysis of Colpitts and Hartley CMOS oscillators
(Signals and Systems Conference (ISSC 2013), 24th IET Irish, 2013-06)
This paper reports comparative analyses of the phase noise predictions through Cadence simulations for two LC oscillator topologies: Colpitts and Hartley oscillators. The oscillators have been designed and phase noise ...
Design implementation and evaluation of a tablet-based student response system for an engineering classroom
(Signals and Systems Conference (ISSC 2013), 24th IET Irish, 2013-06)
Student response systems (SRSs) have generated significant debate and discussion in the educational research literature in the past decade. It is well known that they offer several important advantages including encouraging ...