Results 221 to 230 of about 139,761 (263)
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A Practical Differential Receiver for Amplify-and-Forward Relaying
IEEE Wireless Communications Letters, 2014A practical sequence detector of differential phase-shift keying (DPSK) is developed in closed-form for amplify-and-forward (AF) cooperative networks. This detector is applicable for general M-DPSK (M ≥ 2) with arbitrary sequence length N 8 ≥ 1, which includes a single-by-symbol detector as a special case N 8 = 1.
Peng Liu 0015 +2 more
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On the Power Allocation for Cooperative Amplify-and-Forward Transmission
2007 IEEE 66th Vehicular Technology Conference, 2007In this paper, efficient power allocation strategy for user cooperative transmission using amplify-and-forward (AF) approach is investigated. Power allocation is solved by finding the desirable ratio of power used for cooperative- information transmission to total power in an attempt to minimize bit error rate (BER) with a constraint of fixed total ...
Lian Zhao, Zaiyi Liao
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Cooperative Phase Sweep Amplify-and-Forward Transmission
2008 IEEE 68th Vehicular Technology Conference, 2008This work presents a new amplify-and-forward (AF) cooperative multiple input multiple output (MIMO) transmission scheme based on phase sweep transmit diversity. In a single hop cooperative link, the relay node imposes a phase sweep on the signal it receives from the source node.
Geoffrey G. Messier +2 more
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Overview of Amplify-and-Forward Relaying
2010Amplify-and-Forward (AF) is a simple cooperative strategy for ad-hoc networks with critical power constraints. It involves an amplification of the received signal in the analogue domain at the relays without further signal processing. This chapter gives an overview of the basic AF protocols in the literature and discuss recent research contributions in
Ioannis Krikidis, John S. Thompson
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On the Error Exponent of Amplify and Forward Relay Networks
IEEE Communications Letters, 2011In this letter we derive the exact random coding error exponent of a dual hop amplify and forward (AF) relay network with channel state information (CSI) assisted ideal relay gain. Numerical results have been presented, which provide insight about the performance tradeoff between the error exponent and the data rate of the network.
Bappi Barua +3 more
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Cooperative Amplify-and-Forward with Trellis Coded Modulation
2009 IEEE Wireless Communications and Networking Conference, 2009In a cooperative communication network, individual users are encouraged not only to transmit their own data, but also relay other user's data. This relaying transmission creates spatial diversity to combat the effect of individual severe fading and path loss.
Li Chen 0013 +3 more
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Relay-Aided Amplify-and-Forward Powerline Communications
IEEE Transactions on Smart Grid, 2013Powerline communications (PLC) is a favorable technique for many smart grid applications. By transmitting information over the existing powerline infrastructure, PLC has the benefit of low deployment cost. However, due to low transmit power, limited bandwidth, and harsh channel conditions, reliable long-distance and high-capacity PLC is challenging ...
Xilin Cheng, Rui Cao, Liuqing Yang 0001
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Linear detection for the nonorthogonal amplify and forward protocol
IEEE Transactions on Wireless Communications, 2009In this paper, we present three new detection schemes for the nonorthogonal amplify and forward (NAF) protocol in a cooperative diversity system based on a multiuser detection approach, namely, a channel inversion type detector, a maximal-ratio combining (MRC) type detector, and a biased maximum likelihood (ML) detector. The decision variables in these
Aakanksha Chowdhery, Ranjan K. Mallik
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Amplify-and-forward with full-duplex relay selection
2012 IEEE International Conference on Communications (ICC), 2012This paper focuses on the relay selection problem in amplify-and-forward (AF) cooperative communication with full-duplex (FD) operation. Different relay selection schemes assuming the availability of different instantaneous information are studied. We consider an optimal relay selection that maximizes the instantaneous FD channel capacity and requires ...
Krikidis, Ioannis A. +5 more
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On the Outage Probability in Amplify-and-Forward Relay Channels
2009 IEEE Wireless Communications and Networking Conference, 2009The overall relay channel from the source to the destination via relays has temporal properties quite different from any cellular channel. This work presents a study for time-dependent performance of relay channels for both fast-fading and log-normal shadow fading in terms of average outage duration, frequency of outage and probability of outage ...
Dorra Ben Cheikh Battikh, Ahmed Saadani
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