This paper develops a novel Machine Learning (ML)-based strategy to distribute aperiodic Cooperative Awareness Messages (CAMs) through cellular Vehicle-to-Vehicle (V2V) communications. According it, an ML algorithm is employed by each vehicle forecast its future CAM generation times; then, the autonomously selects radio resources for message broadcasting on basis of provided algorithm. action c...

Unmanned aerial vehicles (UAVs) are widely used in wireless communication networks due to their rapid deployment and high mobility. However, practical scenarios, the existence of obstacles eavesdroppers will seriously interfere with quality UAV network produce a security risk. Thus, this paper combines reconfigurable intelligent surface (RIS) technology UAVs build secure network. Normally, rota...

We study the performance of differential spacetime codes with linear constellation precoding (LCP) for orthogonal frequency division multiplexing (OFDM) cooperative networks over frequency selective channels. Through exploiting the unitary structure of the orthogonal STBCs, we design a low complexity differential STBC-LCP-OFDM receiver for cooperative networks. We assume the amplify-and-forward...

Cooperative communications involves nodes that exchange information and transmitting jointly to a common destination [1]. Whilst different users sharing content is increasingly common on the network-and data-layer, it has so far not occurred on the physical wireless interface. Cooperative transmission has the underlying potential to dynamically tradeoff data rate with reliability, depending on ...

A Wireless Ad-hoc network is an autonomous and self-organizing network without any centralized controller. Cooperative communication is a technique used to increase the reliability and the quality of service (QoS), coverage area range. Space time coding and spatial diversity schemes enhances the performance of the wireless networks. Such networks can be used in military communications and have ...

A robust way to combat multipath fading phenomena in wireless communications is to implement diversity techniques. Diversity is achieved by providing the receivers multiple independent replicas of the same information-bearing symbols through space, time, or frequency. Recently, a new type of diversity, so-called cooperative diversity, has been proposed in order to provide diversity when the wir...

Orthogonal frequency division multiplexing (OFDM) is becoming the chosen modulation technique for wireless communications. OFDM can provide high data rate, large spectrum efficiency with sufficient robustness to radio channel impairments. Cooperative diversity in wireless communication is a promising technique to mitigate multipath fading, which results in a fluctuation in the amplitude of the ...

The paper describes how multimedia technology and cooperative learning are used to teach an online course at the junior level covering signal processing techniques in communications. Students study online presentations enhanced by multimedia animations and perception quizzes, discuss problems using an asynchronous conferencing system, and meet weekly on campus for a cooperative laboratory sessi...

In this paper we address the cooperative navigation of Autonomous Underwater Vehicles (AUVs), where navigation data is exchanged by the vehicles with acoustic modems, with the goal of improving their individual position estimates. The following key points are considered: (i) the fact that the system is continuous but the communications are discrete, and (ii) and the problem of deciding when sho...

For many years, researchers at the Human-Computer Interaction Lab (HCIL) have partnered with children ages 7-11 in designing technology through Cooperative Inquiry. In this paper, we present two cases in which we have worked with adolescents as designers using both a modified form of Cooperative Inquiry and design-focused interview techniques. We find that adolescents can participate as design ...