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Content Provider | IET Digital Library |
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Author | Ge, Songhu Xi, Yong Huang, Shengchun Ma, Yue Wei, Jibo |
Abstract | In this study, the outage-limited optimal power allocation problem for hybrid automatic repeat request (HARQ) protocol over multiple-input–multiple-output (MIMO) block Rayleigh fading channels is addressed. Considering three typical HARQ protocols, the authors first derive the approximate outage probabilities of the MIMO HARQ protocols at the high signal-to-noise ratio region. On the basis of the approximations, they then formulate an optimisation problem of minimising the average total power usage with the constraints of the targeted outage probability and the maximum number of transmission rounds. A closed-form optimal power sequence is obtained by solving the outage-limited optimisation problem. Applying the solutions, the monotonicity of the optimal power sequence is further investigated. It is found that the optimal power sequence is monotonically increasing when the targeted outage probability is smaller than a threshold. They also study the impacts of the system parameters on the optimal power sequence and the power allocation gain under various conditions. Finally, the numerical and simulation results are presented to verify the theoretical derivation. |
Starting Page | 2023 |
Ending Page | 2032 |
Page Count | 10 |
ISSN | 17518628 |
Volume Number | 9 |
e-ISSN | 17518636 |
Issue Number | Issue 16, Nov (2015) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-com/9/16 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.1263 |
Journal | IET Communications |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Approximate Closed-form Outage-limited Optimal Power Allocation Scheme Approximate Outage Probability Automatic Repeat Request Average Total Power Usage Minimisation Closed-form Optimal Power Sequence MIMO Communication MIMO HARQ Protocol Multiple Input Multiple Output Hybrid Automatic Repeat Request Protocol Optimisation Optimisation Technique Outage-limited Optimisation Problem Probability Protocol Radio Link And Equipment Rayleigh Block Fading Channel Rayleigh Channel Reliability Signal-to-noise Ratio Region Statistics Telecommunication Network Reliability Telecommunication Power Management |
Content Type | Text |
Resource Type | Article |
Subject | Electrical and Electronic Engineering Computer Science Applications |
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