Adaptive Modulation For OFDM Signals. The sub band Signal To Noise Ratio in an OFDM communications channel varies by as much as 30 dB. In order to optimise the bandwidth efficiency of OFDM signalling it is desirable to adapt the chosen modulation technique such as M-ary QAM to the SNR available in sub bands. In this way high quality channels transmit the highest bit rates, whilst low quality channels accommodate the lowest bit rates. The net result is that the capacity of the communications link ....Adaptive Modulation For OFDM Signals. The sub band Signal To Noise Ratio in an OFDM communications channel varies by as much as 30 dB. In order to optimise the bandwidth efficiency of OFDM signalling it is desirable to adapt the chosen modulation technique such as M-ary QAM to the SNR available in sub bands. In this way high quality channels transmit the highest bit rates, whilst low quality channels accommodate the lowest bit rates. The net result is that the capacity of the communications link does not have to be limited by designing for worst case conditions.Read moreRead less
Optimal Waveform Design and Compensation Techniques for Non Linear Communication Channels. Distortion effects in satellite amplifiers have a serious impact upon communication system performance, for example, by increasing the error rates.
The research study we are proposing involves analysing these distortion causing non linear effects and designing techniques to compensate for them. Although we are initially interested in the nonlinear satellite channel, we intend the results to be extended t ....Optimal Waveform Design and Compensation Techniques for Non Linear Communication Channels. Distortion effects in satellite amplifiers have a serious impact upon communication system performance, for example, by increasing the error rates.
The research study we are proposing involves analysing these distortion causing non linear effects and designing techniques to compensate for them. Although we are initially interested in the nonlinear satellite channel, we intend the results to be extended to other difficult nonlinear channels such as will be present in future 3G and 4G mobile communication systems.
The proposed research will place Australia at the forefront of cutting edge Information Technology and Communications research.
Read moreRead less
High Bandwidth Efficient Schemes for Portable Multimedia Communications. The introduction of multimedia services for mobile users has resulted in a shortage of satellite spectrum. Spot beam technology is used to provide service in areas of high user density. Adjacent overlapping beams are allocated different frequency bands, however interference from neighbouring beams limits capacity. Multi-User Detection is a technology capable of significantly increasing capacity by frequency re-use in adj ....High Bandwidth Efficient Schemes for Portable Multimedia Communications. The introduction of multimedia services for mobile users has resulted in a shortage of satellite spectrum. Spot beam technology is used to provide service in areas of high user density. Adjacent overlapping beams are allocated different frequency bands, however interference from neighbouring beams limits capacity. Multi-User Detection is a technology capable of significantly increasing capacity by frequency re-use in adjacent spot beams. The aim of this project is to investigate receiver design for multi-user spot-beam channels and develop associated synchronisation and channel estimation methods. The outcome will be efficient communications systems supporting higher user populations, without increasing the bandwidth required.Read moreRead less
Downlinks for Future Earth Observation Satellites: Breaking the Bottlenecks. Future earth-observation satellites require gigabit transmission rates in higher frequency bands. Limitations in the radio frequency spectrum call for spectrally-efficient modulation schemes, which make gigabit data rates particularly challenging. This project aims to design a next-generation transmission scheme for future Ka-Band gigabit satellite downlinks, including novel approaches for dealing with channel effects s ....Downlinks for Future Earth Observation Satellites: Breaking the Bottlenecks. Future earth-observation satellites require gigabit transmission rates in higher frequency bands. Limitations in the radio frequency spectrum call for spectrally-efficient modulation schemes, which make gigabit data rates particularly challenging. This project aims to design a next-generation transmission scheme for future Ka-Band gigabit satellite downlinks, including novel approaches for dealing with channel effects such as group delay, ripple and non-linear satellite power amplifiers. The design intends to include high-speed signal processing and coding architectures, plus real-time signal synthesis and acquisition to allow realistic performance testing and optimisation with satellite hardware from Thales Alenia Space.Read moreRead less
Efficient Transmission Strategies for Cooperative Wireless Ad Hoc Networks. The contribution of information and communications technologies to the national economy has been widely recognized. It enables wealth creation, employment and exports, underpinning many innovation processes. Immediate project benefits will be: contribution to the knowledge base and fundamental capabilities in wireless communication; education of future Australian academic and industrial innovators; raising the internati ....Efficient Transmission Strategies for Cooperative Wireless Ad Hoc Networks. The contribution of information and communications technologies to the national economy has been widely recognized. It enables wealth creation, employment and exports, underpinning many innovation processes. Immediate project benefits will be: contribution to the knowledge base and fundamental capabilities in wireless communication; education of future Australian academic and industrial innovators; raising the international profile of Australian research in the area of information technology. The proposed research is in areas of great commercial interest, addressing new directions and technologies for future wireless networks. Applied development of the outcomes will lead to valuable intellectual property for commercial exploitation.Read moreRead less
Adaptive Broadband Wireless Communication. The contribution of Information and Communications Technologies to the National Economy has been widely recognized. ICT enables wealth creation, employment and exports, and underpins many innovation processes. Immediate project benefits will be: Contribution to the knowledge base and fundamental capabilities in broadband wireless communication; Education of future Australian academic and industrial innovators; Raising the international profile of Austr ....Adaptive Broadband Wireless Communication. The contribution of Information and Communications Technologies to the National Economy has been widely recognized. ICT enables wealth creation, employment and exports, and underpins many innovation processes. Immediate project benefits will be: Contribution to the knowledge base and fundamental capabilities in broadband wireless communication; Education of future Australian academic and industrial innovators; Raising the international profile of Australian research in the area of information technology. Applied development of the outcomes will lead to valuable intellectual property with potential for commercial exploitation. Close links to Australian industry ensures Australian ICT companies stand to gain commercial advantage.Read moreRead less
RNS Hardware for Public-Key Cryptography and E-security. In a world where electronic communication is ever-present, the security of electronic information, e-security, is an issue of the utmost concern for government, business and individuals alike. Public-key cryptography is a powerful tool in the e-security toolkit. Using this technology it is possible to confirm the identity of individuals, maintain the privacy of personal data and guarantee the authenticity of transactions.
The aim of this ....RNS Hardware for Public-Key Cryptography and E-security. In a world where electronic communication is ever-present, the security of electronic information, e-security, is an issue of the utmost concern for government, business and individuals alike. Public-key cryptography is a powerful tool in the e-security toolkit. Using this technology it is possible to confirm the identity of individuals, maintain the privacy of personal data and guarantee the authenticity of transactions.
The aim of this project is to design new public-key cryptography hardware to provide faster, more secure communications for computers, networks and smart cards. Achieving this will require innovations in the way computers perform arithmetic and how this arithmetic is realised as an integrated circuit.Read moreRead less
Improved image analysis: maximised statistical use of geometry/shape constraints. This project will improve image analysis to apply such applications as 3D street-scape reconstruction, synthetic inserts into video for special effects, autonomous navigation, and scene understanding. It will do so by maximally exploiting the geometry of planar surfaces (e.g. walls) and straight lines and other simple geometric shapes.
Transmission beyond linear capacity in fibre optics. This project aims to develop the concept and demonstrate the practicality of a new fibre optic communication technology that allows data transmission rates beyond currently accepted fundamental limits. This project aims to design and demonstrate the feasibility and practicality of utilising nonlinear modes of data transmission. This would assist in the management of fibre impairments that fundamentally limit further increase in data rate causi ....Transmission beyond linear capacity in fibre optics. This project aims to develop the concept and demonstrate the practicality of a new fibre optic communication technology that allows data transmission rates beyond currently accepted fundamental limits. This project aims to design and demonstrate the feasibility and practicality of utilising nonlinear modes of data transmission. This would assist in the management of fibre impairments that fundamentally limit further increase in data rate causing the capacity crunch problem. This is expected to present Australia with leading edge technology to compete in the area of high-speed, high-capacity communication, which is the backbone of our economy, heath, education, social participation, and security.Read moreRead less
Low-energy electro-photonics: novel materials, devices and systems. This project aims to develop low-power technologies for programming and tuning photonic integrated circuits (PICs). By replacing thermal tuning, the project will reduce power consumption from watts to milliwatts, which also eliminates the thermal crosstalk that limits the complexity of today's PICs. The expected outcome will be the basis for a generic field-programmable photonic chip, which can be used to rapidly prototype desig ....Low-energy electro-photonics: novel materials, devices and systems. This project aims to develop low-power technologies for programming and tuning photonic integrated circuits (PICs). By replacing thermal tuning, the project will reduce power consumption from watts to milliwatts, which also eliminates the thermal crosstalk that limits the complexity of today's PICs. The expected outcome will be the basis for a generic field-programmable photonic chip, which can be used to rapidly prototype designs for production as full custom chips as part of a new Australian industry capability. The expected benefits will be a faster innovation cycle, greater adoption of photonic technologies, and support of research into, for example, neuromorphic optical processing, and advanced communications and sensing systems.Read moreRead less