Results 61 to 70 of about 180,313 (330)
Pilot based channel estimation in amplify-and-forward MIMO relay networks
Tongxin xuebao, 2014 A channel estimation method in two time slots for two-hop amplify-and-forward MIMO relay channels is pro-posed.An algorithm for computing the optimal pair of source pilot and relay amplify matrix is developed,which mini-mizes the mean square error of the
Jian ZHOU, Bao-yu ZHENG
doaj +2 more sources
IEEE Access, 2018 In this paper, we investigate the secrecy performance of dual-hop randomize-and-forward (RaF) cognitive relay multi-channel wiretap networks over correlated fading channels, in which the eavesdropper can wiretap the information from source and relays ...
Mu Li +4 more
doaj +1 more source
Spatially Coupled LDPC Codes for Decode-and-Forward in Erasure Relay Channel
, 2011 We consider spatially-coupled protograph-based LDPC codes for the three terminal erasure relay channel. It is observed that BP threshold value, the maximal erasure probability of the channel for which decoding error probability converges to zero, of ...
Kasai, Kenta +2 more
core +1 more source
Functional Metal Complexes for Solar–Light‐Driven Energy Conversion
Advanced Materials, EarlyView.This review provides an exhaustive summary of the recent advancements of functional metal complexes in solar‐to‐electrical, ‐chemical, and ‐thermal energy conversion, comprising material categories, design strategies, underlying principles of operation, and identified improvement of performances.
Yanyan Qin +3 more
wiley +1 more source
Tongxin xuebao, 2012 In a two-way relay system where two nodes exchange information via a half-duplex relay,the achievable data rates of both directions are limited by the weaker link.When the two-way channel is asymmetric due to relay positioning or channel fading,the sum ...
Dan WU, Ya-fei TIAN, Chen-yang YANG
doaj +2 more sources
Bounds on the Capacity of the Relay Channel with Noncausal State at Source
, 2011 We consider a three-terminal state-dependent relay channel with the channel state available non-causally at only the source. Such a model may be of interest for node cooperation in the framework of cognition, i.e., collaborative signal transmission ...
Piantanida, Pablo +3 more
core +4 more sources
Quasi-Concavity for Gaussian Multicast Relay Channels [PDF]
Entropy, 2015 Standard upper and lower bounds on the capacity of relay channels are cut-set (CS), decode-forward (DF), and quantize-forward (QF) rates. For real additive white Gaussian noise (AWGN) multicast relay channels with one source node and one relay node, these bounds are shown to be quasi-concave in the receiver signal-to-noise ratios and the squared source-
Mohit Thakur, Gerhard Kramer
openaire +6 more sources
Advanced Materials, EarlyView.ABSTRACT Biohybrid microswimmers, which integrate the unique mobility and taxis of living cells with the versatility of synthetic cargo, offer exciting opportunities for targeted delivery. However, current biohybrids lack autonomous decision‐making capabilities due to the absence of communication between living and synthetic components. Here, we report
Xiaoran Zheng +3 more
wiley +1 more source
Secrecy Capacity of a Class of Orthogonal Relay Eavesdropper Channels
EURASIP Journal on Wireless Communications and Networking, 2009 The secrecy capacity of relay channels with orthogonal components is studied in the presence of an additional passive eavesdropper node. The relay and destination receive signals from the source on two orthogonal channels such that the destination also ...
Vaneet Aggarwal +3 more
doaj +2 more sources
Topological Interference Management for K-User Downlink Massive MIMO Relay Network Channel
Sensors, 2017 In this paper, we study the emergence of topological interference alignment and the characterizing features of a multi-user broadcast interference relay channel.
Poongundran Selvaprabhu +3 more
doaj +1 more source