Near-Optimum Power Allocation for Outage Restricted Distributed MIMO Multi-Hop Networks

Wübben, Dirk; Lang, Yidong

doi:10.1109/glocom.2008.ecp.862

Cited by 12 publications

(21 citation statements)

References 15 publications

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“…The e2e connection is considered to be in outage if any relay can not decode the message correctly and the e2e performance is then determined by the worst relay link in the network. A similar assumption has also been made in [7], [8], [9] in terms of the e2e outage probability. This is clearly a pessimistic assumption; however, these investigations serve as a worst case in terms of system performance.…”

Section: Introductionmentioning

confidence: 89%

Power Allocations for Adaptive Distributed MIMO Multi-Hop Networks

Lang¹,

Wübben²,

Kammeyer³

2009

2009 IEEE International Conference on Communications

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Abstract-Distributed MIMO multi-hop relaying is one of the most promising technologies that permits cost-effective improvement of coverage, data rate and end-to-end (e2e) user experience by utilizing distributed low-complexity space-time codes to overcome path losses and deep fades of wireless channels. However, an efficient transmission scheme and resource management are required to exploit these advantages. Specifically, low-complexity adaptive schemes and power control strategies should be designed, thereby achieving robust and cost-efficient e2e communications. In this paper an adaptive transmission scheme is presented, where one relay stops forwarding the message if it is in outage and other nodes adapt to a new spacetime code. For this adaptive scheme, optimal as well as suboptimal closed-form power allocation solutions are derived which minimize the total transmission power while satisfying a given e2e outage probability. The significant power savings due to the proposed approaches in comparison to a non-adaptive scheme is demonstrated by numerical results.

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Section: Introductionmentioning

confidence: 89%

Power Allocations for Adaptive Distributed MIMO Multi-Hop Networks

Lang¹,

Wübben²,

Kammeyer³

2009

2009 IEEE International Conference on Communications

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“…This will result in a sub-optimal solution to (6). Based on (9), we will have [It should be noted that in order to evaluate α i and β i values, we only need the p.d.f.…”

Section: Power Allocation Schemementioning

confidence: 99%

“…In fact, we are faced with the following optimisation problem max P 1 ,...,P n a 1 ,...,a n R (6) subject to…”

Section: Power Allocation Schemementioning

confidence: 99%

Power allocation scheme in time division multiple access distributed multiple‐input multiple‐output interference channels

Shariatpanahi¹,

Khalaj²,

Shah‐Mansouri³

2013

IET Communications

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In this study, the authors propose a novel power allocation scheme in time division multiple access (TDMA)-based distributed multiple-input multiple-output (MIMO) channels. By modelling the problem with a TDMA MIMO interference channel, the authors have derived closed-form expressions for power and time slot assigned to each MIMO transmission. Although our scheme is sub-optimal, with the aid of Jensen's inequality, it is shown to be superior to solutions based on channel inversion. In addition, the proposed scheme is compared with the optimal solution, and also with the scheme proposed by Dohler. By applying our proposed power allocation to the hierarchical cooperation strategy, the authors have shown that this scheme significantly improves the overall network throughput compared with the channel inversion solution. However, the improvement gain (which is at high-signal-to-noise ratio values) reduces when the method is compared with Dohler's solution.

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“…With a derivation similar to [26], it is straightforward to show that the approximated form (17) serves as an upper bound for the exact outage probability, i.e., ρ out ≤ρ out . Thus, ifρ out is considered for distributing the power within the multihop system, the applied end-to-end probability constraint is more stringent.…”

Section: ) Non-cooperative Multihop Link Costmentioning

confidence: 99%

Interference Analysis and Management for Spatially Reused Cooperative Multihop Wireless Networks

Maham

Saad

Debbah

et al. 2014

IEEE Trans. Commun.

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Abstract-In this paper, we consider a decode-and-forward based wireless multihop network with a single source node, a single destination node, and N intermediate nodes. To increase the spectral efficiency and energy efficiency of the system, we propose a cooperative multihop communication protocol with spatial reuse, in which interference is treated as noise or can be canceled. The performance of spatial-reused space-time coded cooperative multihop network is analyzed over Rayleigh fading channels. In particular, the exact closed-form expression for the outage probability at the nth receiving node is derived when there are multiple interference sources over non-i.i.d. Rayleigh fading channels. Furthermore, the outage probability expressions are derived when nodes are equipped with more than one antenna. In addition, to reduce the effect of interference on multihop transmission, we propose a simple power control scheme which is only dependent on the statistical knowledge of channels. In the second approach for managing the interference, linear interference cancelation schemes are employed for both non-cooperative and cooperative spatial-reused multihop transmissions. Finally, the analytic results were confirmed by simulations. Simulation results show that the spatial-reused multihop transmission outperforms the interference-free multihop transmission in terms of energy efficiency in low and medium SNR scenarios.

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Near-Optimum Power Allocation for Outage Restricted Distributed MIMO Multi-Hop Networks

Cited by 12 publications

References 15 publications

Power Allocations for Adaptive Distributed MIMO Multi-Hop Networks

Power Allocations for Adaptive Distributed MIMO Multi-Hop Networks

Power allocation scheme in time division multiple access distributed multiple‐input multiple‐output interference channels

Interference Analysis and Management for Spatially Reused Cooperative Multihop Wireless Networks

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