Results 31 to 40 of about 55,618 (226)
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
Performance Comparison between Adaptive and Fixed Transmit Power in Underlay Cognitive Radio Networks [PDF]
, 2013 In this paper, we compare the performance in terms of symbol error probability, data rate and power consumption of the use of fixed transmit power (FTP) and adaptive transmit power (ATP) in underlay cognitive radio networks. The use of FTP alleviates the
Ajib, Wessam +2 more
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
A Low-Complexity Precoding Scheme for the Downlink of Multi-Cell Multi-User MIMO AF System [PDF]
, 2012 Because of its simplicity, amplify-and-forward (AF) is one of the most popular cooperative relaying technique. Relays are used in cooperative communication to improve reliability, coverage or spectral efficiency of cell-edge users.
Héliot, Fabien +2 more
core +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
The Cramer-Rao Bound for channel estimation in block fading amplify-and-forward relaying networks [PDF]
, 2010 In this paper, we express the Cramer-Rao Bound (CRB) for channel coefficient and noise variance estimation at the destination of an Amplify-and- Forward (AF) based cooperative system, in terms of the a posteriori expectation of the codewords.
Aerts, Nico +2 more
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
FEBS Open Bio, EarlyView.Tandem VHH targeting distinct EGFR epitopes were engineered into a monovalent bispecific antibody (7D12‐EGA1‐Fc) with more potent ADCC without increasing affinity to EGFR. Structural modeling of 7D12‐EGA1‐Fc showed cross‐linking of separate EGFR domains to enhance CD16a engagement on NK cells.
Yuqiang Xu +5 more
wiley +1 more source
Advanced Functional Materials, EarlyView.An all‐in‐one analog AI accelerator is presented, enabling on‐chip training, weight retention, and long‐term inference acceleration. It leverages a BEOL‐integrated CMO/HfOx ReRAM array with low‐voltage operation (<1.5 V), multi‐bit capability over 32 states, low programming noise (10 nS), and near‐ideal weight transfer.
Donato Francesco Falcone +11 more
wiley +1 more source