13 research outputs found
Performance evaluation of DVB-RCT return path in fading channels with added diversity
This paper resulted in an invitation to present the work at Philadelphia University, Jordan, which, itself, resulted in a grant of £200k from Eastern Investment Group Holdings (contact [email protected]) to fund a research fellow and two PhD students to develop this work further. It also paved the way for collaboration with Professor William Webb (Head of Research & Development, OFCOM, [email protected]) to research associated spectrum issues
Orthogonal wavelet division multiplex: an alternative to OFDM
Subsequent research, based on this output, has produced an Electronics Letter and a conference paper. Professor Ulrich Reimers, Braunschweig Technical University ([email protected]) who was the chair of the DVB project indicated that this technology might simplify current technology - specifically in the field of OFDM
Impact of physical and virtual carrier sensing on the route discovery mechanism in noisy MANETs
In cellular consumer devices, one of the limiting factors for efficiency is that of overhead on the network layer that effects on the performance of the network. A substantial design issue is that, with cellular consumer devices, the discovery phase of the routing process, when attempting to establish a mobile ad hoc network, a high demand is placed on the network layer. Hence, a challenge for the designer is to reduce this demand, thus increasing overall device availability.
Routing algorithms, and hence the performance of the networks are adversely affected by inefficient carrier sensing methods which can lead to increasing packet loss within the network environment.
In this paper, the effect of physical and virtual carrier sensing on the route discovery mechanism has been identified and this paper suggests that choosing a suitable carrier sensing threshold in a high density and noisy mobile ad hoc network yields a better performance than if the default value is used