IEEE 802.11a/b/g standards support multiple transmission rates. Even though the use of multiple transmission rates increase the WLAN capacity, this feature leads to the performance anomaly problem. Cooperative communication was introduced to relieve the performance anomaly problem. Data packets are delivered to the destination much faster through a relay node with high rate than through direct ...

This work analyzes the optimal power allocation in coded cooperative communication systems with a single relay and using the amplify-and-forward protocol. Non-binary lowdensity parity-check (LDPC) codes are used at the source and a fast Fourier transform (FFT)-based decoding algorithm is employed at the destination. We study the power distribution between the source and the relay based on the m...

This paper investigates a wireless cooperative relay network with multiple relays communicating with the destination over orthogonal channels. Proposed is a cooperative transmission scheme that employs two signal-to-noise ratio (SNR) thresholds and multiple hard-decision detections (HDD) at the destination. One SNR threshold is used to select transmitting relays, and the other threshold is used...

This paper presents design and implementation of three new Infrared Counter-Countermeasure (IRCCM) efficient methods using Neural Network (NN), Fuzzy System (FS), and Kalman Filter (KF). The proposed algorithms estimate tracking error or correction signal when jamming occurs. An experimental test setup is designed and implemented for performance evaluation of the proposed methods. The methods v...

Physical layer security (PLS) and simultaneous wireless information power transfer (SWIPT) in cooperative relaying have gained great interest as technologies for energy enhancement Internet-of-Things (IoT) networks. In this work, we investigate PLS a SWIPT- AF-enabled IoT system, consisting of one source, multiple harvesting (EH) relays, destination, the presence an eavesdropper that tries to o...

Intelligence reconfigurable surfaces (IRS) have attracted attention due to their ability create an intelligent and controllable wireless propagation environment for supporting efficient, secure design. Security privacy protection are fundamental requirements based on the eavesdropping attacks in networks. Physical layer security (PLS) is important technique that guarantees information-theoretic...

IEEE 802.11a/b/g standards support multiple data rates. Although the use of multiple data rates increases the capacity of wireless networks, it can lead to a performance anomaly problem. Cooperative communication for wireless networks has attracted considerable interest owing to its ability to mitigate this performance anomaly problem. In cooperative communication, a number of relay nodes suppo...

Due to the limited energy supplies of nodes, in many applications like wireless sensor networks energy-efficiency is crucial for extending the lifetime of these networks. We study the routing problem for multihop wireless ad hoc networks based on cooperative transmission. The source node wants to transmit messages to a single destination. Other nodes in the network may operate as relay nodes. I...

Cooperative communication provides a new way of introducing spatial diversity to wireless systems. In order to increase the spectral efficiency of coded cooperative relaying system, the adaptive modulation technique is presented under Rayleigh fading channel in this paper. The source and relay adapt their modulation schemes based on the channel condition of all three links, i.e. source to relay...