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Array Communications & Array Processing
Array Communications and Array Processing have evolved into a well-established
research area moving from old diversity systems, conventional direction
nulling and phased-arrays to space-time communications, advanced superresolution
direction finding algorithms and superresolution beamformers. The idea
of combining Arrays with Communication Systems is recent and has the potential
of providing more powerful wireless communication systems where both space
and time information is exploited.
Mobile Communications
The highly successful introduction and rapid growth of mobile telephone
networks has re-emphasised the need for the efficient use of the limited
bandwidth that is available. The activity of the mobile communication
research group is, in one way or another, concerned with the research
into techniques for improving the efficiency of bandwidth utilisation,
and with techniques for improving the reliability of communication over
fading channels.
Communication Networks
With the realisation of new generations of network technologies, the integration
and interoperation of multiple heterogeneous networks supporting mobile
services and user facilities will be of great importance. The Communication
Networks Team is concerned with research leading to the development of
techniques to enhance the responsiveness of new technologies and systems
when facing dynamic traffic changes, a variety of user requirements and
the deployment of new services.
Stochastic Signals and Filters
The team research effort is directed towards the development of design
techniques for fixed and adaptive parameter digital filters. Moreover,
it looks into implementation issues on a range of platforms (FPGA, DSP
Chips, ASICs) and their application in a wide range of stochastic signal
processing problems.
Speech Processing
The Speech Processing group has years of experience in noise cancellation
for speech enhancement, speaker verification using HMM methods and voice
source parameters, as well as multi-rate stereophonic acoustic echo cancellation.
We also research in speech coding, epoch detection for speaker verification
and time segmentation for acoustic echo cancellation.
Image Processing
Image Processing encompasses a variety of techniques applied to digital images in the broadest sense of the word: optical images, hyperspectral images captured by satellites orbiting the Earth, 3D seismic images of the crust of the Earth, 3D tomographic images of the human body, as well as video sequences. The Group has active research on image fusion, enhancement, restoration, texture and shape analysis, object recognition, invariant feature construction, colour analysis etc.
Computer vision
Computer vision is closely associated with image processing and patter recognition. In the simplest terms, computer vision aspires to make computers reason on the content of digital images. The Group has active research projects on cognitive vision, that combines machine learning and computer vision, networks of cameras that cooperate to track moving objects, 3D reconstruction of objects for face modelling and recognition, and on more fundamental aspects of how the human visual system works.
Biomedical Image and Signal ProcessinG
Image and Signal Processing has a lot to offer to Biomedical sciences: Biomedical data analysis may be used to make explicit information that is implicit in the data, thus help us understand better how the human body works and also help the clinicians with diagnosis and visualisation of their data. The Group has active projects concerning the analysis of EEG and MEG data, 3D MRI data related to cancer research, microarray data concerning gene expression, and work combining computer graphics with image processing technologies for plastic surgery planning.
Remote Sensing and the Environment
With the recent climatic changes, the environment is at the forefront of public concern. Earth observation data coming from satellites orbiting the Earth may be combined with ground collected data, map information and other sources to help us monitor the state of the environment, create hazard maps for possible natural disasters, forecast and monitor events like landslides and floods, as well as manage resources and recommend actions. The group has a lot of experience in such research projects.