Electronic & Electrical Eng (Scholarly Publications): Recent submissions
Now showing items 481-500 of 610
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Gradual phase transition between the smectic- C* and smectic- CA* phases and the thresholdless antiferroelectricity
(2008)We have constructed the phase diagrams for a binary-mixture system of antiferroelectric and ferroelectric liquid-crystalline materials in both thick and thin cells. In the phase diagrams the boundary between the smectic-C* ... -
Antiferroelectric dielectric relaxation processes and the interlayer interaction in antiferroelectric liquid crystals
(2008)Antiphase relaxation process of antiferroelectric phase is investigated in binary mixtures of antiferroelectric and ferroelectric liquid crystalline compounds. It is found that the frequency of the antiphase mode ranges ... -
Anomalous dependence of response time on the electric field in an electroclinic liquid crystal with large induced tilt and polarization
(2009)We investigate the response time of an electroclinic liquid crystal with large induced tilt and polarization (de Vries smectic A*). The response time is found to increase with the increase in electric field up to a threshold ... -
OFDM sub-carrier allocation algorithm for a multiple user data enhanced radio server (MUDERS) using a general purpose processor platform
(2004)This paper presents a novel spectrum-allocation technique designed for a high data-rate and spectrally-efficient multiple-user wireless system. The core of this system is a reconfigurable radio, implemented on a ... -
Modulation scheme classification for 4G software radio wireless networks
(2002)This paper describes software radio and a software radio technique for automatic digital modulation scheme recognition. The modulation recognition technique is designed for a real-time software radio using general-pur ... -
Selecting appropriate hardware For software radio systems
(2002)Software radio is an emerging technology that offers great opportunities for the development of future wireless systems. Many different views exist on how to build both the software and hardware required by a software ... -
Mobile context aware stories
(IEEE, 2002)An interactive narrative is a story that is shaped by digital technology and that allows the dynamic presentation of scenes or sequences based on input from the user. In this paper we present a new foundation for interactive ... -
UMBRELLA.net: exploring coincidence ad-hoc networks
(2004)UMBRELLA.net is an experimental platform for developing ad-hoc networks based around coincidence or chance occurrences. The project utilizes the haphazard and unpredictable patterns of weather and crowd formation as ... -
Exploring Reconfigurability: Towards a future of spectrum rental
(IEEE, 2003)This paper focuses on the area of dynamic spectrum management and explores how reconfigurable radio can play a major role in its realization. In particular the paper presents a case study based on IRIS (Implementing ... -
Flexible architecture software radio OFDM transceiver system and frame synchronization analysis
(IEEE, 2003)Abstract-In this paper, we present findings relating to frame synchronization algorithms for software radio based OFDM systems in addition to an overview of the design and implementation of an (OFDM) Software Radio based ... -
Electric-field-dependent dielectric response in the de Vries-type smectic- A* phase possessing local orientational order with nanoscale correlation length
(2008)The dielectric strength is shown to increase and the relaxation frequency to decrease for a large temperature range up to a certain value of the electric field in the smectic-A* phase. This behavior contrasts to that ... -
Radio transmitter fingerprinting: A steady state frequency domain approach
(IEEE, 2008)We present a novel technique for radio transmitter identification based on frequency domain characteristics. Our technique detects the unique features imbued in a signal as it passes through a transmit chain. We are the ... -
Small planar monopole covers multiband BRANs
(2000)The use of a single antenna which can cover a wide range of frequencies is a desirable feature for future wireless communications systems. The emerging self-organising and ad-hoc networks require more than an octave ... -
The social fashioning of emerging communications infrastructures
(2004)This paper looks at the changing dynamics of the networked experience as new communications infrastructures emerge to support a network body whose disembodied presence is grounded in the necessity of the material. Unlike ... -
Symbol timing synchronization in software radio receivers
(2004)The Centre for Telecommunications Value Chain Driven Research (CTVR) approach to software radio is to focus on the use of a general-purpose processor (GPP). The use of a GPP to perform signal processing for communications ... -
Principles of cognitive network teamwork
(2006)This paper looks ahead at the future of wireless communications systems that can combine their resources and capabilities in order to enhance their overall ability to collect and convey information. Cognitive network teamwork ... -
SDR for opportunistic use of UMTS licensed bands
(2006)The UMTS radio frequency spectrum is a highly expensive commodity. While the UMTS standards make very efficient use of the allocated bands there is however opportunity for further advancements. This paper focuses on ... -
A noise adaptive symbol timing synchronization algorithm for software radio receivers
(2004)Software radio promises tremendous benefits from both commercial and military standpoints. Currently, there are a number of different 'shades' of software radio based on the use of FPGAs, DSP chips or general-purpose ... -
A platform for exploring reconfigurability in distributed and disaggregated wireless networks
(IEEE, 2005)The purpose of this paper is to present an overview of a platform for exploring reconfigurability in wireless networks. The types of networks that are particularly of interest here are distributed and disaggregated ...
