Currently I am researching in
the field of antenna arrays as a part-time PhD student in DIT. My
supervisors are Dr. Conor Downing (DIT) and Dr Brian Foley (TCD) .
Specifically we are investigating MIMO techniques for improving the
efficiency of radio systems. A brief description of the theory is supplied
and further details may be found in the recent ISSC paper (see
publications webpage). Also, a power point slide presentation of recent
results is included.
Previously I completed an Msc
investigating the simultaneous transmission of speech and data by means of
adaptive signal processing.
MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) SYSTEMS
Foschini, Gans et al of Lucent Technologies
have proposed using two arrays in a multipath environment, to create
multiple parallel channels over the same bandwidth.
The general idea of such systems is to use an array of N
transmitters and N receivers to transmit data at N times the rate of a
single transmitter receiver pair (the multiple data streams being
transmitted in the same the same frequency band). Hence, they are
categorized as multiple input multiple output systems (MIMO) systems. The
techniques depend on a combination of spatial and time diversity, which is
derived from the presence of multiple copies of the data due to multipath.
This ‘echo signature’ is used as the basis for the digital signal
processing at the receiver that extracts the data.
POWER POINT PRESENTATION