Cognitive relay nodes for airborne LTE emergency networks

This paper is proposing a novel concept of Cognitive Relay Node for intelligently improving the radio coverage of an airborne LTE emergency network, considering the scenarios outlined in the ABSOLUTE research project. The proposed network model was simulated comparing the different cases of deploying relay nodes to complement the coverage of an aerial LTE network. Simulation results of the proposed Cognitive Relay Nodes show significant performance improvement in terms of radio coverage quantified by the regional outage probability enhancement. Also, this paper is presenting the methodology and results of choosing the optimum aerial eNodeB altitude

Detection of satellite telephones for maritime security

The technological progress on the digital processing has an impact on the approach to the detection and localization of electromagnetic sources. In this technical report, we present a monitoring system to detect mobile satellite terminals in the open sea. The monitoring system is based on high gain antennas and amplifiers and the correlation of the known spectrum responses. The monitoring system can be implemented using low-cost component and it can be deployed in the patrolling boats. The prototype can be improved and deployed on the vessels of the coast guard or the navy, which have the responsibility to patrol the sea for illegal immigrants and piracy activities. A similar monitoring system can also be installed on Unmanned Air Vehicles (UAV) used for the same purpose.JRC.G.6-Security technology assessmen

Experimentally detecting IEEE 802.11n wi-fi based on cyclostationarity features for ultra-wide band cognitive radios

In this paper we present some experimental results on the cyclostationarity properties of the IEEE802.11n Wi-Fi transmissions, and the usage of the cyclostationarity features to detect IEEE802.11n radios in the context of ultra wide band (UWB) based cognitive radios (CR). The IEEE 802.11n lies in the UWB frequency range, at 5.2GHz, and the CR needs to successfully detect the legacy user to avoid interference. By performing cyclostationarity analysis we compute the cyclic power spectrum (CPS) of the IEEE802.11n transmissions and use it for detecting the presence of the legacy user. We conduct experimentations to perform our study under different channel conditions and perform post signal analysis to measure the detection performance using the CPS based detection technique. The probability of false alarm and the probability of missed detection are computed and the results are presented for different channel conditions, together with the CPS of the legacy user's signal

Chapter UWB Cognitive Radios

Management & management technique

Aerial-terrestrial communications: terrestrial cooperation and energy-efficient transmissions to aerial-base stations

Hybrid aerial-terrestrial communication networks based on low-altitude platforms are expected to meet optimally the urgent communication needs of emergency relief and recovery operations for tackling large-scale natural disasters. The energy-efficient operation of such networks is important given that the entire network infrastructure, including the battery-operated ground terminals, exhibits requirements to operate under power-constrained situations. In this paper, we discuss the design and evaluation of an adaptive cooperative scheme intended to extend the survivability of the battery-operated aerial-terrestrial communication links. We propose and evaluate a real-time adaptive cooperative transmission strategy for dynamic selection between direct and cooperative links based on the channel conditions for improved energy efficiency. We show that the cooperation between mobile terrestrial terminals on the ground could improve energy efficiency in the uplink, depending on the temporal behavior of the terrestrial and aerial uplink channels. The corresponding delay in having cooperative (relay-based) communications with relay selection is also addressed. The simulation analysis corroborates that the adaptive transmission technique improves overall energy efficiency of the network whilst maintaining low latency, enabling real-time applications