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This paper discusses the possible application of a particular family of binary sequences, the De Bruijn ones, as spreading codes in a vehicular scenario, by evaluating their performance according to different analytical tools. In an unfriendly environment, such as the vehicular one, that poses several constraints on transmission techniques for their reliability, it might be useful to have a wide set...
The problem of providing a collaborative early warning system for multiple moving vehicles against a small size fast moving object like a motorbike. This approach consists of three stages: The first stage consists of detecting the incoming object using a highly directive antenna at 5.0 GHz in license free industrial, scientific and medical (ISM) band. The second stage consists of broadcasting the...
In recent years the technological development has encouraged several applications based on node to node communications without any fixed infrastructure. This paper presents preliminary evaluation of popular estimating techniques to populate active nodes in the neighborhood using De Bruijn sequences. They have much higher cardinality compared to any other family of binary sequences at a parity of length...
In recent years the technological development has encouraged several applications based on distributed communications network without any fixed infrastructure. The problem of providing a collaborative early warning system for multiple mobile nodes against a fast moving object. The solution is provided subject to system level constraints: motion of nodes, antenna sensitivity and Doppler effect at 2...
Self organizing mobile Ad-Hoc networks have gained much attention in the last decade particularly due to their ease of deployment in war zones and natural disasters. Because of the fact that the Ad-Hoc network is a virtual network created by the participating nodes, this approach can be applied to remote areas with no fixed networking capability, and is ideal for coordination in remote locations....
Emergency Medical Services (EMS) accident notification time is often delayed in areas with sparse cellular coverage and non-periodic communication access points. It is possible to mitigate such coverage gaps using cooperative communication which, by its distributed nature, does not rely on fixed base stations in remote areas. In the event of a collision EMS notification can be relayed through surrounding...
Satellite communication systems operate in the presence of path loss and atmospherically induced fading, which results in waveform distortion, altering phase and bit time period. After penetrating through several atmospheric layers, the signal experiences Doppler shift which results in frequency change and phase reversal, thus to sync the receiver to the incoming signal we make use of the Phase Locked...
Communicating effectively over a large distance has always been the quest of engineers and scientists and with the transition of modern day systems from analog to digital, has further complicated the scenario. Several modulation techniques like the AM and FM, have been tried and tested in the past century to get the desired analog signal at the receiver. But with the introduction of digital systems...
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