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.
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Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0347247
Funder
Australian Research Council
Funding Amount
$400,000.00
Summary
Optical and Microwave Free-Space Communications Development and Test Facility. Our aim is to upgrade the capability of the University of Canberra, Monash University, the RMIT University and The University of New South Wales at ADFA to collaborate in the development and testing of next generation ultra-broadband telecommunications and data-communications devices and systems. We will augment existing instrumentation at each of the institutions to enable the collaborative development, testing and ....Optical and Microwave Free-Space Communications Development and Test Facility. Our aim is to upgrade the capability of the University of Canberra, Monash University, the RMIT University and The University of New South Wales at ADFA to collaborate in the development and testing of next generation ultra-broadband telecommunications and data-communications devices and systems. We will augment existing instrumentation at each of the institutions to enable the collaborative development, testing and system integration of high capacity free-space optical and microwave components. Experimental systems will be tested in the free-space optical communications range and satellite earth station complex situated on the University of Canberra campus.Read moreRead less