Results 41 to 50 of about 40,503 (307)

Dispensing with channel estimation: differentially modulated cooperative wireless communications

, 2011
As a benefit of bypassing the potentially excessive complexity and yet inaccurate channel estimation, differentially encoded modulation in conjunction with low-complexity noncoherent detection constitutes a viable candidate for user-cooperative systems ...
Wang, Li, Li Wang, Hanzo, Lajos, Lajos Hanzo   +3 more
core   +1 more source

Optimizing cooperative cognitive radio networks with opportunistic access [PDF]

, 2012
Optimal resource allocation for cooperative cognitive radio networks with opportunistic access to the licensed spectrum is studied. Resource allocation is based on minimizing the symbol error rate at the receiver.
Radaydeh, Redha M., Yunfei Chen, Zafar, A, Alouini, Mohamed-Slim, Radaydeh, RM, Zafar, Ammar, Mohamed-Slim Alouini, Redha M. Radaydeh, Chen, Yunfei, Chen, Y, Ammar Zafar, Alouini, MS   +11 more
core   +1 more source

Information Theoretical Limits on Cooperative Communications

, 2009
This chapter provides an overview of the information theoretic foundations of cooperative communications. Earlier information theoretic achievements, as well as the more recent developments, are discussed. The analysis accounts for full/half-duplex node,
Elza Erkip, Melda Yuksel, Yüksel, M., Erkip, E.   +3 more
core   +1 more source

Hardware- and Interference-Limited Cognitive IoT Relaying NOMA Networks With Imperfect SIC Over Generalized Non-Homogeneous Fading Channels

IEEE Access, 2020
Internet-of-Things (IoT) technology has received much attention due to its great potential to interconnect billions of devices in a broad range of applications. IoT networks can provide high-quality services for a large number of users and smart objects.
Sultangali Arzykulov, Galymzhan Nauryzbayev, Mohammad S. Hashmi, Ahmed M. Eltawil, Khaled M. Rabie, Shakhmaran Seilov   +5 more
doaj   +1 more source

Cooperative SWIPT MIMO-NOMA for Reliable THz 6G Communications

Network, 2022
In this paper, cooperative simultaneous wireless information and power transfer (SWIPT) terahertz (THz) multiple-input multiple-output (MIMO) nonorthogonal multiple access (NOMA) are considered.
Haider W. Oleiwi, Nagham Saeed, Hamed Al-Raweshidy   +2 more
doaj   +1 more source

A low complexity approach of combining cooperative diversity and multiuser diversity in multiuser cooperative networks [PDF]

, 2013
In this paper, we investigate the scheduling scheme to combine cooperative diversity (CD) and multiuser diversity (MUD) in multiuser cooperative networks under the time resource allocation (TRA) framework in which the whole transmission is divided into ...
Lv, Tiejun, Yang, Shaoshi, Zhang, Zhang
core   +1 more source

Ti3C2Tx MXene/Silver Composite Foams For Lightweight, High‐Performance Electromagnetic Interference Shielding and Joule Heating

Advanced Materials Interfaces, EarlyView.
Ultrathin MXene/EMF composite foams achieve a specific shielding efficiency of 749.6 dB.dB·cm3$\mathrm{dB}\cdot {\mathrm{cm}}^{3}$/g, while the silver‐enhanced MXene/Ag/EMF reaches 81.4 dB shielding effectiveness at just 1.0 mm thickness. Both composites exhibit rapid Joule heating, retain stability up to 250∘C$^\circ{\rm C}$, and withstand 1000 ...
Abdullah A. Mahmood, Mingxuan Li, Vahid Rad, Mehdi Zarei, Chen‐Yu Yeh, Masoud Soroush, Guangyong Li, Paul W. Leu   +7 more
wiley   +1 more source

Cluster Head-Based Cooperative Communication System for Efficient Energy Consumption in Swarm UAVs

IEEE Access
Demand for unmanned aerial vehicles (UAVs) has surged across diverse domains. Because UAV systems are battery-powered, their available energy is limited, which in turn constrains transmit power and thus communication range. To mitigate these constraints,
Donghyeon Kim, Yoseb Lee, Sangoh Park
doaj   +1 more source

Ergodic Capacity Analysis of Decode-and-Forward Relay-Assisted FSO Systems Over Alpha–Mu Fading Channels Considering Pointing Errors

IEEE Photonics Journal, 2016
The ergodic capacity of decode-and-forward (DF) relay-assisted free-space optical (FSO) communication systems when line of sight is available is analyzed over gamma–gamma fading channels with pointing errors.
Ruben Boluda-Ruiz, Antonio Garcia-Zambrana, Beatriz Castillo-Vazquez, Carmen Castillo-Vazquez   +3 more
doaj   +1 more source

Cooperation, Conflict and the Evolution of Communication [PDF]

Adaptive Behavior, 1999
This paper presents a general model that covers signaling with and without conflicts of interest between signalers and receivers. Krebs and Dawkins (1984) argued that a conflict of interests will lead to an evolutionary arms race between manipulative signalers and sceptical receivers, resulting in ever more costly signals; whereas common interests will
openaire   +4 more sources