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Source-Sum-Power Minimization in Multi-Sensor Single-Relay Networks with Direct Links
- Authors
- Kim, Insook; Kim, Dongwoo
- Issue Date
- Jul-2012
- Publisher
- Institute of Electrical and Electronics Engineers
- Keywords
- Source-sum-power minimization; direct link; sensor networks; relaying technique
- Citation
- IEEE Communications Letters, v.16, no.7, pp.1076 - 1079
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE Communications Letters
- Volume
- 16
- Number
- 7
- Start Page
- 1076
- End Page
- 1079
- ISSN
- 1089-7798
- Abstract
- This letter provides power allocation that minimizes source-sum-power in wireless multi-sensor single-relay networks with direct links. As relaying methods, amplify-and-forward (AF) and decode-and-forward (DF) are examined, respectively. For DF relaying, an exact optimal power allocation is provided by using Karush-Kuhn-Tucker (KKT) condition, but a suboptimal allocation is presented for AF relaying since the problem becomes non-convex in AF case. Numerical investigation is used to verify the optimality of the proposed solutions, to compare the source-power consumptions with and without the direct link and to examine the effect of relay location on the power consumption.
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Related Researcher
- Kim, Dong woo
- ERICA 공학대학 (SCHOOL OF ELECTRICAL ENGINEERING)