The Experts below are selected from a list of 9186 Experts worldwide ranked by ideXlab platform
Friedrich K. Jondral - One of the best experts on this subject based on the ideXlab platform.
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Outage Capacity of bursty amplify and forward with incremental relaying
International Symposium on Information Theory and its Applications, 2010Co-Authors: Tobias Renk, Holger Jakel, Friedrich K. Jondral, Deniz Gunduz, Andrea GoldsmithAbstract:We derive the Outage Capacity of a bursty version of the amplify-and-forward (BAF) protocol for small signal-to-noise ratios when incremental relaying is used. We show that the ratio between the Outage capacities of BAF and the cut-set bound is independent of the relay position and that BAF is Outage optimal for certain conditions on the target rate R. This is in contrast to decode-and-forward with incremental relaying, where the relay location strongly determines the performance of the cooperative protocol. We further derive the Outage Capacity for a network consisting of an arbitrary number of relay nodes. In this case the relays transmit in subsequent partitions of the overall transmission block and the destination accumulates signal-to-noise ratio until it is able to decode.
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On Outage Capacity for Incremental Relaying with Imperfect Feedback
arXiv: Information Theory, 2010Co-Authors: Tobias Renk, Holger Jaekel, Friedrich K. JondralAbstract:We investigate the effect of imperfect feedback on the \epsilon-Outage Capacity of incremental relaying in the low signal-to-noise ratio (SNR) regime. We show that imperfect feedback leads to a rescaling of the pre-log factor (comparable to the multiplexing gain for networks operating in the high SNR regime) and thus reduces the \epsilon-Outage Capacity considerably. Moreover, we investigate the effect of different degrees of feedback reliability on the system performance. We further derive a simple binary tree-based construction rule to analyze networks with an arbitrary number of relay nodes with respect to imperfect feedback. This rule can directly be mapped to a comprehensive matrix notation.
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ISITA - Outage Capacity of bursty amplify-and-forward with incremental relaying
2010 International Symposium On Information Theory & Its Applications, 2010Co-Authors: Tobias Renk, Holger Jakel, Friedrich K. Jondral, Deniz Gunduz, Andrea GoldsmithAbstract:We derive the Outage Capacity of a bursty version of the amplify-and-forward (BAF) protocol for small signal-to-noise ratios when incremental relaying is used. We show that the ratio between the Outage capacities of BAF and the cut-set bound is independent of the relay position and that BAF is Outage optimal for certain conditions on the target rate R. This is in contrast to decode-and-forward with incremental relaying, where the relay location strongly determines the performance of the cooperative protocol. We further derive the Outage Capacity for a network consisting of an arbitrary number of relay nodes. In this case the relays transmit in subsequent partitions of the overall transmission block and the destination accumulates signal-to-noise ratio until it is able to decode.
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Outage Capacity of Incremental Relaying at Low Signal-to-Noise Ratios
arXiv: Information Theory, 2009Co-Authors: Tobias Renk, Friedrich K. Jondral, Deniz Gunduz, Holger Jaekel, Andrea GoldsmithAbstract:We present the \epsilon-Outage Capacity of incremental relaying at low signal-to-noise ratios (SNR) in a wireless cooperative network with slow Rayleigh fading channels. The relay performs decode-and-forward and repetition coding is employed in the network, which is optimal in the low SNR regime. We derive an expression on the optimal relay location that maximizes the \epsilon-Outage Capacity. It is shown that this location is independent of the Outage probability and SNR but only depends on the channel conditions represented by a path-loss factor. We compare our results to the \epsilon-Outage Capacity of the cut-set bound and demonstrate that the ratio between the \epsilon-Outage Capacity of incremental relaying and the cut-set bound lies within 1/\sqrt{2} and 1. Furthermore, we derive lower bounds on the \epsilon-Outage Capacity for the case of K relays.
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Outage Capacity of Incremental Relaying at Low Signal-to-Noise Ratios
2009 IEEE 70th Vehicular Technology Conference Fall, 2009Co-Authors: Tobias Renk, Holger Jakel, Friedrich K. Jondral, Deniz Gunduz, Andrea GoldsmithAbstract:We present the � -Outage Capacity of incremental relaying at low signal-to-noise ratios (SNR) in a wireless cooperative network with slow Rayleigh fading channels. The relay performs decode-and-forward and repetition coding is employed in the network, which is optimal in the low SNR regime. We derive an expression on the optimal relay location that maximizes the � -Outage Capacity. It is shown that this location is independent of the Outage probability and SNR but only depends on the channel conditions represented by a path-loss factor. We compare our results to the � -Outage Capacity of the cut-set bound and demonstrate that the ratio between the � -Outage Capacity of incremental relaying and the cut-set bound lies within 1/ √ 2 and 1. Furthermore, we derive lower bounds on the � -Outage Capacity for the case of K relays.
Dirk Dahlhaus - One of the best experts on this subject based on the ideXlab platform.
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simple ergodic and Outage Capacity expressions for correlated diversity ricean fading channels
IEEE Transactions on Wireless Communications, 2006Co-Authors: Simeon Furrer, Pedro Coronel, Dirk DahlhausAbstract:Multiple-antenna systems have been shown to achieve very high spectral efficiencies. In this paper, we derive simple single-integral expressions for the ergodic and Outage Capacity of a diversity system in correlated Ricean fading channels, where the channel coefficients are assumed to be known to the receiver only. For illustration purpose, we present numerical results showing the effect of channel correlation, Ricean components, angular spread and multipath components in an orthogonal frequency-division multiplexing (OFDM) system
Tobias Renk - One of the best experts on this subject based on the ideXlab platform.
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Outage Capacity of bursty amplify and forward with incremental relaying
International Symposium on Information Theory and its Applications, 2010Co-Authors: Tobias Renk, Holger Jakel, Friedrich K. Jondral, Deniz Gunduz, Andrea GoldsmithAbstract:We derive the Outage Capacity of a bursty version of the amplify-and-forward (BAF) protocol for small signal-to-noise ratios when incremental relaying is used. We show that the ratio between the Outage capacities of BAF and the cut-set bound is independent of the relay position and that BAF is Outage optimal for certain conditions on the target rate R. This is in contrast to decode-and-forward with incremental relaying, where the relay location strongly determines the performance of the cooperative protocol. We further derive the Outage Capacity for a network consisting of an arbitrary number of relay nodes. In this case the relays transmit in subsequent partitions of the overall transmission block and the destination accumulates signal-to-noise ratio until it is able to decode.
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On Outage Capacity for Incremental Relaying with Imperfect Feedback
arXiv: Information Theory, 2010Co-Authors: Tobias Renk, Holger Jaekel, Friedrich K. JondralAbstract:We investigate the effect of imperfect feedback on the \epsilon-Outage Capacity of incremental relaying in the low signal-to-noise ratio (SNR) regime. We show that imperfect feedback leads to a rescaling of the pre-log factor (comparable to the multiplexing gain for networks operating in the high SNR regime) and thus reduces the \epsilon-Outage Capacity considerably. Moreover, we investigate the effect of different degrees of feedback reliability on the system performance. We further derive a simple binary tree-based construction rule to analyze networks with an arbitrary number of relay nodes with respect to imperfect feedback. This rule can directly be mapped to a comprehensive matrix notation.
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ISITA - Outage Capacity of bursty amplify-and-forward with incremental relaying
2010 International Symposium On Information Theory & Its Applications, 2010Co-Authors: Tobias Renk, Holger Jakel, Friedrich K. Jondral, Deniz Gunduz, Andrea GoldsmithAbstract:We derive the Outage Capacity of a bursty version of the amplify-and-forward (BAF) protocol for small signal-to-noise ratios when incremental relaying is used. We show that the ratio between the Outage capacities of BAF and the cut-set bound is independent of the relay position and that BAF is Outage optimal for certain conditions on the target rate R. This is in contrast to decode-and-forward with incremental relaying, where the relay location strongly determines the performance of the cooperative protocol. We further derive the Outage Capacity for a network consisting of an arbitrary number of relay nodes. In this case the relays transmit in subsequent partitions of the overall transmission block and the destination accumulates signal-to-noise ratio until it is able to decode.
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Outage Capacity of Incremental Relaying at Low Signal-to-Noise Ratios
arXiv: Information Theory, 2009Co-Authors: Tobias Renk, Friedrich K. Jondral, Deniz Gunduz, Holger Jaekel, Andrea GoldsmithAbstract:We present the \epsilon-Outage Capacity of incremental relaying at low signal-to-noise ratios (SNR) in a wireless cooperative network with slow Rayleigh fading channels. The relay performs decode-and-forward and repetition coding is employed in the network, which is optimal in the low SNR regime. We derive an expression on the optimal relay location that maximizes the \epsilon-Outage Capacity. It is shown that this location is independent of the Outage probability and SNR but only depends on the channel conditions represented by a path-loss factor. We compare our results to the \epsilon-Outage Capacity of the cut-set bound and demonstrate that the ratio between the \epsilon-Outage Capacity of incremental relaying and the cut-set bound lies within 1/\sqrt{2} and 1. Furthermore, we derive lower bounds on the \epsilon-Outage Capacity for the case of K relays.
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Outage Capacity of Incremental Relaying at Low Signal-to-Noise Ratios
2009 IEEE 70th Vehicular Technology Conference Fall, 2009Co-Authors: Tobias Renk, Holger Jakel, Friedrich K. Jondral, Deniz Gunduz, Andrea GoldsmithAbstract:We present the � -Outage Capacity of incremental relaying at low signal-to-noise ratios (SNR) in a wireless cooperative network with slow Rayleigh fading channels. The relay performs decode-and-forward and repetition coding is employed in the network, which is optimal in the low SNR regime. We derive an expression on the optimal relay location that maximizes the � -Outage Capacity. It is shown that this location is independent of the Outage probability and SNR but only depends on the channel conditions represented by a path-loss factor. We compare our results to the � -Outage Capacity of the cut-set bound and demonstrate that the ratio between the � -Outage Capacity of incremental relaying and the cut-set bound lies within 1/ √ 2 and 1. Furthermore, we derive lower bounds on the � -Outage Capacity for the case of K relays.
Simeon Furrer - One of the best experts on this subject based on the ideXlab platform.
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simple ergodic and Outage Capacity expressions for correlated diversity ricean fading channels
IEEE Transactions on Wireless Communications, 2006Co-Authors: Simeon Furrer, Pedro Coronel, Dirk DahlhausAbstract:Multiple-antenna systems have been shown to achieve very high spectral efficiencies. In this paper, we derive simple single-integral expressions for the ergodic and Outage Capacity of a diversity system in correlated Ricean fading channels, where the channel coefficients are assumed to be known to the receiver only. For illustration purpose, we present numerical results showing the effect of channel correlation, Ricean components, angular spread and multipath components in an orthogonal frequency-division multiplexing (OFDM) system
Andrea Goldsmith - One of the best experts on this subject based on the ideXlab platform.
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Outage Capacity of bursty amplify and forward with incremental relaying
International Symposium on Information Theory and its Applications, 2010Co-Authors: Tobias Renk, Holger Jakel, Friedrich K. Jondral, Deniz Gunduz, Andrea GoldsmithAbstract:We derive the Outage Capacity of a bursty version of the amplify-and-forward (BAF) protocol for small signal-to-noise ratios when incremental relaying is used. We show that the ratio between the Outage capacities of BAF and the cut-set bound is independent of the relay position and that BAF is Outage optimal for certain conditions on the target rate R. This is in contrast to decode-and-forward with incremental relaying, where the relay location strongly determines the performance of the cooperative protocol. We further derive the Outage Capacity for a network consisting of an arbitrary number of relay nodes. In this case the relays transmit in subsequent partitions of the overall transmission block and the destination accumulates signal-to-noise ratio until it is able to decode.
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ISITA - Outage Capacity of bursty amplify-and-forward with incremental relaying
2010 International Symposium On Information Theory & Its Applications, 2010Co-Authors: Tobias Renk, Holger Jakel, Friedrich K. Jondral, Deniz Gunduz, Andrea GoldsmithAbstract:We derive the Outage Capacity of a bursty version of the amplify-and-forward (BAF) protocol for small signal-to-noise ratios when incremental relaying is used. We show that the ratio between the Outage capacities of BAF and the cut-set bound is independent of the relay position and that BAF is Outage optimal for certain conditions on the target rate R. This is in contrast to decode-and-forward with incremental relaying, where the relay location strongly determines the performance of the cooperative protocol. We further derive the Outage Capacity for a network consisting of an arbitrary number of relay nodes. In this case the relays transmit in subsequent partitions of the overall transmission block and the destination accumulates signal-to-noise ratio until it is able to decode.
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Outage Capacity of Incremental Relaying at Low Signal-to-Noise Ratios
arXiv: Information Theory, 2009Co-Authors: Tobias Renk, Friedrich K. Jondral, Deniz Gunduz, Holger Jaekel, Andrea GoldsmithAbstract:We present the \epsilon-Outage Capacity of incremental relaying at low signal-to-noise ratios (SNR) in a wireless cooperative network with slow Rayleigh fading channels. The relay performs decode-and-forward and repetition coding is employed in the network, which is optimal in the low SNR regime. We derive an expression on the optimal relay location that maximizes the \epsilon-Outage Capacity. It is shown that this location is independent of the Outage probability and SNR but only depends on the channel conditions represented by a path-loss factor. We compare our results to the \epsilon-Outage Capacity of the cut-set bound and demonstrate that the ratio between the \epsilon-Outage Capacity of incremental relaying and the cut-set bound lies within 1/\sqrt{2} and 1. Furthermore, we derive lower bounds on the \epsilon-Outage Capacity for the case of K relays.
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Outage Capacity of Incremental Relaying at Low Signal-to-Noise Ratios
2009 IEEE 70th Vehicular Technology Conference Fall, 2009Co-Authors: Tobias Renk, Holger Jakel, Friedrich K. Jondral, Deniz Gunduz, Andrea GoldsmithAbstract:We present the � -Outage Capacity of incremental relaying at low signal-to-noise ratios (SNR) in a wireless cooperative network with slow Rayleigh fading channels. The relay performs decode-and-forward and repetition coding is employed in the network, which is optimal in the low SNR regime. We derive an expression on the optimal relay location that maximizes the � -Outage Capacity. It is shown that this location is independent of the Outage probability and SNR but only depends on the channel conditions represented by a path-loss factor. We compare our results to the � -Outage Capacity of the cut-set bound and demonstrate that the ratio between the � -Outage Capacity of incremental relaying and the cut-set bound lies within 1/ √ 2 and 1. Furthermore, we derive lower bounds on the � -Outage Capacity for the case of K relays.
