نتایج جستجو برای: cooperative diversity network
تعداد نتایج: 908044 فیلتر نتایج به سال:
In this paper, we propose a cooperative transmission scheme for multihop underwater (UW) acoustic sensor networks to enhance network performance. Relay nodes are employed as virtual antennas to achieve diversity gains. Based on the distinct characteristics of the UW channel, such as high transmission loss, propagation delay, and ambient noises, this paper presents a distributed cooperative sche...
In this paper, we propose a modulation multiplexing distributed space-time coding for two-user cooperative diversity in wireless network, in which the information of one user lies in the in-phase axis (I axis), while that of the other user lies in quadrature-phase axis (Q axis). Since two users share both time and frequency resource in cooperation sub-frame, the proposed scheme is more bandwidt...
Like any sentient organism, a smart environment relies first and foremost on sensory data captured from the real world. The sensory data come from sensor nodes of different modalities deployed on different locations forming a Wireless Sensor Network (WSN). Embedding smart sensors in humans has been a research challenge due to the limitations imposed by these sensors from computational capabilit...
As wireless communication becomes more prevalent, the demand for higher data rates and uninterrupted connectivity is increasing. Future wireless systems are provisioned to be highly heterogeneous and interconnected. On one side, wireless ad hoc networks are emerging for a wide range of new applications, on the other side; infrastructure based broadband wireless systems are expanding to provide ...
Recently proposed physical-layer network coding (PNC) [1] has demonstrated the promise to significantly improve the throughput of wireless networks whose links can be modeled as additive white Gaussian noise (AWGN) channels. However, the extension to multipath channels is problematic, since the technique would then require both amplitude and phase compensation at each transmitter. Phase compens...
In our previous work Li et al., in Proc of 3rd IEEE Int Workshop on Engineering of Automatic & Automation Systems, Potsdam, Germany, 2006, pp 25–34; Li et al., in Proc Workshop on Nature Inspired Cooperative Strategies for Optimization, Granada, Spain, 2006, pp 123–134, we introduced automated self-assembly programming paradigm (ASAP2) using unguided selfassembly and swarm-inspired methodologie...
In our previous work Li et al., in Proc of 3rd IEEE Int Workshop on Engineering of Automatic & Automation Systems, Potsdam, Germany, 2006, pp 25–34; Li et al., in Proc Workshop on Nature Inspired Cooperative Strategies for Optimization, Granada, Spain, 2006, pp 123–134, we introduced automated self-assembly programming paradigm (ASAP2) using unguided selfassembly and swarm-inspired methodologie...
In this paper, we consider a cooperative network that is trying to reach consensus on the occurrence of an event by communicating over not fully connected and time-invariant network topologies with fading channels. We first discuss the fusion and diversity decision-making strategies over time-invariant network topologies and shed light on the underlying trade-offs. We then propose an integrated...
Each node in the network is equipped with a single omnidirectional antenna and motivated by the large body of physical layer research indicating its potential utility, that multiple nodes are able to coordinate their transmissions at the physical layer in order to take advantage of spatial diversity. Such coordination, however, is intrinsically intertwined with routing decisions, thus motivatin...
J.Bhuvaneswari#1 , G.Rajkumar*2,C.Nishanthini#3, D.Sharmila#4, R.Sujitha#5 *Assistant Professor,School of Electrical and Electronics Engineering, SASTRA University, # PG Student, School of Electrical and Electronics Engineering, SASTRA University, Thanjavur, India-613402 1 [email protected], 2 [email protected] , 3 [email protected] , [email protected], 5 [email protected] Ab...
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