Secure communication is a promising technology for wireless networks because it ensures secure transmission of information. In this paper, we investigate the joint subcarrier (SC) assignment and power allocation problem for nonorthogonal multiple access (NOMA) amplify-and-forward twoway relay wireless networks, in the presence of eavesdroppers. By exploiting cooperative jamming (CJ) to enhance ...

Relay networks have recently attracted extensive attention due to its potential to increase coverage area and channel capacity. In a relay network, a source node communicates with a destination node with the help of the relay node. The performances of improving the channel capacity and coverage area have been explored and evaluated in the literature (Sendonaris et al., 2003)-(Laneman et al., 20...

In this paper, we study end-to-end energy efficiency of an orthogonal frequency-division multiplexing relay-based system under power constraints for the base station and relay node with system circuit power considerations. Using a two-phase amplify-and-forward relaying protocol, we assume that relay has a fixed power constraint and the source power can vary in transmission power interval where ...

Ultra Wideband (UWB) system is overlapped with various wireless systems, such as WLAN, WiMax and UMTS, which limits the use of UWB. Cognitive Radio (CR) enables UWB systems to efficiently use the overlapped spectrum without causing interference to other wireless systems. In this paper, we focuses on the low-complexity joint optimization algorithm design with respect to transmit power allocation...

In this paper, we consider partitioned edge learning (PARTEL), which implements parameter-server training, a well known distributed learning method, in wireless network. Thereby, PARTEL leverages computation resources at devices to train large-scale artificial intelligence (AI) model by dynamically partitioning the into parametric blocks for separated updating devices. Targeting b...