Nelson Costa

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Narrowband multiple input–multiple -output (MIMO) measurements using 16 transmitters and 16 receivers at 2.11 GHz were carried out in Manhattan. High capacities were found for full, as well as smaller array configurations, all within 80% of the fully scattering channel capacity. Correlation model parameters are derived from data. Spatial MIMO channel(More)
The basic concepts for exoskeletal systems have been suggested for some time with applications ranging from construction, manufacturing and mining to rescue and emergency services. In recent years, research has been driven by possible uses in medical/rehabilitation and military applications. Yet there are still significant barriers to the effective use and(More)
Narrowband MIMO measurements using 16 transmitters and 16 receivers at 2.11 GHz were carried out in Manhattan. High capacities were found for full as well as smaller array configurations, all within 80% of the fully scattering channel capacity. It was found that two streets which might be considered near LOS, had different capacities one about 45% of and(More)
Many patients with spinal injures are confined to wheelchairs, leading to a sedentary lifestyle with secondary pathologies and increased dependence on a carer. Increasing evidence has shown that locomotor training reduces the incidence of these secondary pathologies, but the physical effort involved in this training is such that there is poor compliance.(More)
The present work proposes an adaptive solution to provide quality of service in Voice over IP communications. This solution is based on three components that interact inorder to achieve higher quality in voice communication. The first two consist in changing the Codec and the transport protocol in real-time during a conversation; the third consists in using(More)
The basic concepts for exoskeletal systems have been suggested for some time with 21 applications ranging from construction, manufacturing and mining to rescue and emergency services. In recent years, research has been driven by possible uses in medi23 cal/rehabilitation and military applications. Yet there are still significant barriers to the effective(More)
Currently many patients with brain/spinal cord/sport injuries or stroke, are confined to wheelchairs which results in many secondary conditions. Locomotor training attempts to encourage the patient to undertake walking exercises but the physical effort is such that there is poor compliance, as it requires a highly intensive and task-specific therapy(More)
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