Results 31 to 40 of about 54,061 (146)
IEEE Photonics Journal, 2022 The scheme of combining relay and optical code division multiple access (OCDMA) is one of the effective methods to improve the reliability and security of free space optical (FSO) communication system.
Jianhua Ji +4 more
doaj +1 more source
IEEE AccessThis paper introduces the cooperative quadrature spatial modulation (CQSM) system with hybrid decode-amplify-forward (HDAF) relaying protocol. Compered with the traditional CQSM system which only uses amplify-and-forward (AF) protocol and decode-and ...
Xiangyan Bu, Ke Pang
doaj +1 more source
How to Solve the Problem of Bad Performance of Cooperative Protocols at Low SNR
EURASIP Journal on Advances in Signal Processing, 2007 We propose some new adaptive amplify-and-forward (AF) and decode-and-forward (DF) protocols using a selection. The new selection criterion is a function of the instantaneous capacities of all possible transmission schemes (with or without cooperation ...
Jean-Claude Belfiore +2 more
doaj +1 more source
Piggybacking Codes for Network Coding: The High/Low SNR Regime
, 2017 We propose a piggybacking scheme for network coding where strong source inputs piggyback the weaker ones, a scheme necessary and sufficient to achieve the cut-set upper bound at high/low-snr regime, a new asymptotically optimal operational regime for the
Ghanem, Samah A. M.
core +1 more source
When Can a Relay Reduce End-to-End Communication Delay?
, 2014 The impact of relaying on the latency of communication in a relay channel is studied. Both decode-forward (DF) and amplify-forward (AF) are considered, and are compared with the point-to-point (P2P) scheme which does not use the relay. The question as to
Chaaban, Anas, Sezgin, Aydin
core +1 more source
Sensors, 2018 Cooperative relaying is an effective technology to improve the capacity of physical-layer security, in which the relay helps forward the received signal to the destination. In this paper, a cooperative compressive sensing and amplify-and-forward (CCS-AF)
Jialun Li +5 more
doaj +1 more source
Optimization of Full-Duplex Relaying System With Non-Linear Energy Harvester
IEEE Access, 2020 Simultaneous wireless information and power transfer (SWIPT) is a promising technique to prolong the lifetime of energy constrained relay-based systems. Most of the existing literature on relay-based SWIPT systems incorporate linear energy harvesting (EH)
Syed Adil Abbas Kazmi, Sinem Coleri
doaj +1 more source
Performansi Sistem Komunikasi Kooperatif Menggunakan Teknik Amplify and Forward (Af) Dengan Modulasi Quadrature Phase Shift Keying (Qpsk) [PDF]
, 2013 Pada media nirkabel sinyal yangdikirimkan sering mengalami gangguan yang dapatmenurunkan kinerja sistem. Hal ini dapat membuat kondisikanal menurun, mengakibatkan kapasitas kanal dankeandalan data yang dikirimkan juga menurun.
M. Fauzan Edy Purnomo, ST., MT., Alvin Yazlin., Ali Mustofa, ST., MT
core
Asymptotic Capacity of Large Fading Relay Networks with Random Node Failures
, 2010 To understand the network response to large-scale physical attacks, we investigate the asymptotic capacity of a half-duplex fading relay network with random node failures when the number of relays $N$ is infinitely large.
Cui, Shuguang +2 more
core +1 more source
Asymptotic Capacity of Large Relay Networks with Conferencing Links
, 2011 In this correspondence, we consider a half-duplex large relay network, which consists of one source-destination pair and $N$ relay nodes, each of which is connected with a subset of the other relays via signal-to-noise ratio (SNR)-limited out-of-band ...
Cui, Shuguang +2 more
core +1 more source