Abstract
The power adaptation issue for multi-hop sensor networks is considered in this paper to minimize the energy consumption with a given requirement of the average end-toend bit error rate (BER) performance. To optimize the power adaptation, a nonlinear programming problem is formulated and an analytical result is derived from its Karush-Kuhb-Tucker (KKT) necessary conditions. Numerical examples are presented to compare the networks with the proposed power adaptation scheme and a distributed power adaptation scheme, in which the transmitter of each individual hop adjusts its transmission power based on its own channel state information (CSI) and a specified BER requirement for this hop. A significant energy saving is achieved with the use of the proposed scheme.
Original language | English |
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Pages | 112-116 |
Number of pages | 5 |
DOIs | |
State | Published - 2009 |
Event | 5th International Conference on Mobile Ad-hoc and Sensor Networks, MSN 2009 - Fujian Province, China Duration: 14 Dec 2009 → 16 Dec 2009 |
Conference
Conference | 5th International Conference on Mobile Ad-hoc and Sensor Networks, MSN 2009 |
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Country/Territory | China |
City | Fujian Province |
Period | 14/12/09 → 16/12/09 |
Keywords
- End-to-end BER
- Multi-hop networks
- Optimization
- Power adaptation