### Abstract

Original language | English |
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Title of host publication | 2008 IEEE Global Telecommunications Conference |

Subtitle of host publication | IEEE GLOBECOM 2008 |

Publisher | IEEE Institute of Electrical and Electronic Engineers |

Pages | 4679-4684 |

Number of pages | 6 |

ISBN (Print) | 978-1-4244-2324-8 |

DOIs | |

Publication status | Published - 2008 |

MoE publication type | A4 Article in a conference publication |

Event | IEEE Global Telecommunications Conference, IEEE GLOBECOM 2008 - New Orleans, United States Duration: 30 Nov 2008 → 3 Dec 2008 |

### Conference

Conference | IEEE Global Telecommunications Conference, IEEE GLOBECOM 2008 |
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Abbreviated title | IEEE GLOBECOM 2008 |

Country | United States |

City | New Orleans |

Period | 30/11/08 → 3/12/08 |

### Fingerprint

### Keywords

- power control
- fading
- programmable control
- adaptive control
- finance
- calculus
- vectors
- channel capacity
- random variables
- probability distribution

### Cite this

*2008 IEEE Global Telecommunications Conference: IEEE GLOBECOM 2008*(pp. 4679-4684). IEEE Institute of Electrical and Electronic Engineers . https://doi.org/10.1109/GLOCOM.2008.ECP.896

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*2008 IEEE Global Telecommunications Conference: IEEE GLOBECOM 2008.*IEEE Institute of Electrical and Electronic Engineers , pp. 4679-4684, IEEE Global Telecommunications Conference, IEEE GLOBECOM 2008, New Orleans, United States, 30/11/08. https://doi.org/10.1109/GLOCOM.2008.ECP.896

**Efficient power control over fading channels.** / Kotelba, Adrian; Mämmelä, Aarne.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Efficient power control over fading channels

AU - Kotelba, Adrian

AU - Mämmelä, Aarne

PY - 2008

Y1 - 2008

N2 - This paper introduces a novel concept of efficient power control in nonergodic fading channels. We use the risk-reward approach to quantitatively describe the performance of power control schemes. A power control scheme is said to be efficient if it minimizes the risk for a given level of reward. The reward and risk are measured, respectively, as the expected value of the link spectral efficiency in excess of some predefined target value and the below-target semideviation of the link spectral efficiency distribution. Furthermore, we introduce a novel fundamental limit on the performance of adaptive power control schemes. The new fundamental limit, which we call the efficient frontier, is the set of all efficient power control schemes. We analytically derive the adaptive power control rule that achieves the fundamental limit. We show that no power control scheme can be constructed with the performance above the efficient frontier. The numerical results suggest that various state-of-the-art power control schemes are suboptimal, i.e., their risk-reward performance is below the efficient frontier.

AB - This paper introduces a novel concept of efficient power control in nonergodic fading channels. We use the risk-reward approach to quantitatively describe the performance of power control schemes. A power control scheme is said to be efficient if it minimizes the risk for a given level of reward. The reward and risk are measured, respectively, as the expected value of the link spectral efficiency in excess of some predefined target value and the below-target semideviation of the link spectral efficiency distribution. Furthermore, we introduce a novel fundamental limit on the performance of adaptive power control schemes. The new fundamental limit, which we call the efficient frontier, is the set of all efficient power control schemes. We analytically derive the adaptive power control rule that achieves the fundamental limit. We show that no power control scheme can be constructed with the performance above the efficient frontier. The numerical results suggest that various state-of-the-art power control schemes are suboptimal, i.e., their risk-reward performance is below the efficient frontier.

KW - power control

KW - fading

KW - programmable control

KW - adaptive control

KW - finance

KW - calculus

KW - vectors

KW - channel capacity

KW - random variables

KW - probability distribution

U2 - 10.1109/GLOCOM.2008.ECP.896

DO - 10.1109/GLOCOM.2008.ECP.896

M3 - Conference article in proceedings

SN - 978-1-4244-2324-8

SP - 4679

EP - 4684

BT - 2008 IEEE Global Telecommunications Conference

PB - IEEE Institute of Electrical and Electronic Engineers

ER -