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Co-operative Amplify and Forward Relaying Strategy for Mobile Adhoc Network for Efficient Communication

Vivek K. Dethe, Dr. Ghule C.V., Dr. Om Prakash
In this paper, we will discuss about the cooperative communications and analyze the performance of amplify and forward protocol for single relay model in idealistic condition which gives way forward to  ...  Such an arrangement creates a virtual MIMO (multiple-input and multiple-output) system [2] [3] .  ...  Amplify and Forward Strategy As the name suggests, in the Amplify and Forward technique simply amplify the signal received by the relay and then forward it to the destination.  ... 
doi:10.17148/ijireeice.2017.5204 fatcat:qriuie2azfbafhpbyjb4w7ipaa

Wireless Cooperative Networks

Andrea Conti, Jiangzhou Wang, Hyundong Shin, Ramesh Annavajjala, Moe Z. Win
2008 EURASIP Journal on Advances in Signal Processing  
Ikki and M. H. Ahmed. They consider an amplify-and-forward (AF) cooperative diversity system where a source node communicates with a  ...  On the other hand, the cooperation among nodes, as in the case of wireless sensor networks, allows a distributed space-time signal processing which enables, among others, environmental monitoring, localization  ...  Chockalingam consider cooperative space-frequency block-coded orthogonal frequencydivision multiplexing (SFBC-OFDM) networks with amplify-and-forward (AF) and decode-and-forward (DF) protocols at the relays  ... 
doi:10.1155/2008/810149 fatcat:c6vwhztbpjaglnjnz2fsdpgvam

On the Error Rate and Delay Performance Analysis of OFDM based Cooperative Protocol for 802.11 Networks

Irfan Ahmed
We develop and analyze a distributed space-frequency block code-orthogonal frequency division multiplexing protocol for cooperative communications in 802.11 networks.  ...  Space frequency block codes (SFBC) are spread over OFDM subcarriers instead of OFDM symbols to compensate for the small coherence time.  ...  [1] indicated that adaptive decode-and-forward strategies offer the same performance as fixed amplify-and-forward. Meng Yu et al.  ... 
doi:10.24297/ijct.v10i2.7001 fatcat:v2uvz3xrxzaejhgem3ztalx2ia

Adaptive Distributed Space-Time Coding for Cooperative MIMO Relaying Systems with Limited Feedback

Tong Peng, Rodrigo C. de Lamare, Anke Schmeink
2013 2013 IEEE 77th Vehicular Technology Conference (VTC Spring)  
An adaptive distributed space-time coding (DSTC) scheme is proposed for two-hop cooperative MIMO networks.  ...  Linear minimum mean square error (MMSE) receive filters and adjustable matrices subject to a power constraint are considered with an amplify-and-forward (AF) cooperation strategy.  ...  algorithm [3] and various distributed space-time coding (DSTC) schemes in [4] , [5] and [16] can be employed.  ... 
doi:10.1109/vtcspring.2013.6691856 dblp:conf/vtc/PengLS13 fatcat:m67446mfmje4xj67b3eaq63ko4

Adaptive Distributed Space-Time Coding in Cooperative MIMO Relaying Systems using Limited Feedback [article]

T. Peng, R. C. de Lamare, A. Schmeink
2013 arXiv   pre-print
Linear minimum mean square error (MMSE) receiver filters and randomized matrices subject to a power constraint are considered with an amplify-and-forward (AF) cooperation strategy.  ...  An adaptive randomized distributed space-time coding (DSTC) scheme is proposed for two-hop cooperative MIMO networks.  ...  space-time coding (DSTC) schemes in [2] , [3] and [19] can be employed.  ... 
arXiv:1303.4384v1 fatcat:zmeljasen5d3lgkg4aqgxu5q4a

Distributed Space-Time Systems

Ranjan K. Mallik, Arogyaswami J. Paulraj, Mrityunjoy Chakraborty, Keith Q. T. Zhang, George K. Karagiannidis
2008 EURASIP Journal on Advances in Signal Processing  
Does distributed space-time coding (DSTC) work well with OFDMA as it does with standard MIMO systems?  ...  What are good space-time codes for distributed antennas? What are the channel models for this problem? What are good strategies for channel estimation? How do we do precoding?  ...  The paper "Distributed space-time block coded transmission with imperfect channel estimation: achievable rate and power allocation" by L. Musavian and S.  ... 
doi:10.1155/2008/891036 fatcat:7s27pofeubdqrabiz3qyx7ngkm

Adaptive Randomized Distributed Space-Time Coding in Cooperative MIMO Relay Systems [article]

T. Peng, R. C. de Lamare, A. Schmeink
2013 arXiv   pre-print
Linear minimum mean square error (MMSE) receivers and an amplify-and-forward (AF) cooperation strategy are considered.  ...  An adaptive randomized distributed space-time coding (DSTC) scheme and algorithms are proposed for two-hop cooperative MIMO networks.  ...  In this paper, we propose an adaptive randomized distributed space-time coding scheme and algorithms for a two-hop cooperative MIMO relaying system with the AF protocol and linear MMSE receivers.  ... 
arXiv:1303.4120v1 fatcat:qipl5li5undurp7na73md46s3i

Distributed MIMO technologies in cooperative wireless networks

Shichuan Ma, Yaoqing Yang, Hamid Sharif
2011 IEEE Communications Magazine  
Commonly used distributed space-time codes are distributed space-time block codes and distributed space-time trellis codes.  ...  AMPLIFY-AND-FORWARD The simplest relay protocol is amplify-and-forward (AF) [6] . In AF, each relay amplifies the received noisy signals and forwards them to the destination.  ... 
doi:10.1109/mcom.2011.5762801 fatcat:vktt3566unbrrat773qveu3fl4

Simple Cooperative Relaying Strategies for WiMAX Communication System

Simone Morosi, Dania Marabissi, Romano Fantacci, Enrico Del Re, Sara Jayousi
2009 2009 IEEE Wireless Communications and Networking Conference  
The cooperative schemes proposed combine the Amplify and Forward (AAF) and the Decode and Forward (DAF) algorithm with Delay Diversity (DD) and Cyclic Delay Diversity (CDD) techniques, in order to exploit  ...  We investigated the pros and cons of each scheme, comparing the assumptions which are required and the simulation results with respect to two cooperative implementations of the Alamouti scheme.  ...  In OFDM system Alamouti scheme can be implemented both in the time domain (STBC, Space Time Block Coding) and in the frequency domain (SFBC, Space Frequency Block Coding) [11] [12] [13] .  ... 
doi:10.1109/wcnc.2009.4917966 dblp:conf/wcnc/MorosiMFRJ09 fatcat:lqgx4w6bdbdlxhfktnqnibzfzi

A Low Complex Modified Golden Code in a Cooperative Relaying System

K. Thilagam, K. Jayanthi
2014 International Journal of Computer Networks & Communications  
Concerning with the physical layer issues, in this paper it is focussed on with providing a better space time block coding (STBC) scheme and incorporating it in the cooperative relaying nodes to upgrade  ...  The single relay cooperative STBC consisting of source, relay and destination are considered. The cooperative protocol strategy considered in the relay node is Decode and forward (DF) protocol.  ...  been discussed in [10] .In [11] , the space time block codes for a half-duplex multiple input multiple output (MIMO) and non-orthogonal amplify and forward (NAF) cooperative diversity scheme with multiple  ... 
doi:10.5121/ijcnc.2014.6106 fatcat:lutjygtmyvhojnlhiackzvsh6y

Hybrid Turbo FEC/ARQ Systems and Distributed Space-Time Coding for Cooperative Transmission

Adrian Agustin, Josep Vidal, Olga Muñoz
2005 International Journal of Wireless Information Networks  
of the relay (decode&forward or amplify&forward) and the number of antennas at each terminal.  ...  This design involves the definition of the type of retransmission (incremental redundancy, repetition coding), the design of the distributed space-time codes, the error correcting scheme, the operation  ...  Distributed space-time block codes Distributed space-time block codes are based on the space-time block codes applied to distributed antennas.  ... 
doi:10.1007/s10776-005-0012-z fatcat:mqz3zr7g3ncvld2i6cchkuq7ru

On the performance of cooperative diversity protocols in practical wireless systems

E. Zimmermann, P. Herhold, G. Fettweis
2003 2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484)  
As with other diversity schemes (e.g. space time block codes), our results for uncoded transmission can easily be combined with FEC techniques to obtain excellent error rate performance.  ...  Our findings imply that under these conditions full second order diversity can only be achieved by using adaptive versions of cooperative protocols.  ...  Consider, for example, the case of channel coding or space-time codes for a higher numbers of antennas with R < 1.  ... 
doi:10.1109/vetecf.2003.1285922 fatcat:cvduyoxq6veixgnebswccojr34

Study of Buffer-Aided Space-Time Coding for Multiple-Antenna Cooperative Wireless Networks [article]

T. Peng, R. C. de Lamare
2015 arXiv   pre-print
A maximum likelihood receiver and adjustable code vectors are considered subject to a power constraint with an amplify-and-forward cooperation strategy.  ...  In this work we propose an adaptive buffer-aided space-time coding scheme for cooperative wireless networks.  ...  In traditional cooperative systems, amplify-and-forward (AF), decode-andforward (DF) or compress-and-forward (CF) [4] cooperation strategies are designed with the help of multiple relay nodes.  ... 
arXiv:1506.08487v2 fatcat:5htyttjsgjekdloswxr7a7u6c4

A Review on Cooperative Communication Protocols in Wireless World

Juhi Garg, Priyanka Mehta, Kapil Gupta
2013 International Journal of Wireless & Mobile Networks  
Cooperative communications can efficiently combat the severity of fading and shadowing through the assistance of relays.  ...  Future generations of cellular communications requires higher data rates and a more reliable transmission link with the growth of multimedia services, while keeping satisfactory quality of service, .  ...  In [36] , outage performance of MIMO relay channel has been investigated when source and relay use same orthogonal space time block code.  ... 
doi:10.5121/ijwmn.2013.5209 fatcat:pfwbtdjc4vh2fc7qvuzaplstfy

Distributed On-Off Power Control for Amplify-and-Forward Relays with Orthogonal Space-Time Block Code

Mingjun Dai, Chi Wan Sung, Yan Wang
2011 IEEE Transactions on Wireless Communications  
Index Terms-Orthogonal space-time block codes (OSTBC), amplify-and-forward (AF), parallel relay network, power control.  ...  We call this transmission protocol as distributed orthogonal space-time block coded adaptive amplifyand-forward (DOSTBC-AAF).  ...  GCOD COMBINED WITH ADAPTIVE AMPLIFY-AND-FORWARD We apply the half symbol-rate GCOD code to the parallel relay network, with each relay acts as an antenna.  ... 
doi:10.1109/twc.2011.040511.101285 fatcat:53fqqo3pvvcnvckpvcypth2i2a
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