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In this paper, the authors study the reliable packet forwarding in Wireless Sensor Networks (WSNs) with the Multiple-Input Multiple-Output (MIMO) and Orthogonal Space Time Block Codes (OSTBC) techniques. The objective is to propose a cross-layer optimized forwarding scheme to maximize the Successful Transmission Rate (STR) while satisfying the given end-to-end energy consumption constraint. The channel coding, energy allocation, and route planning are jointly considered to improve the STR. After formulating the problem as a local stochastic optimization, they propose a low-complexity distributed scheme to reduce the implementation complexity.
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