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In this paper, we investigate the energy-efficient transmission problem by resource allocation in SCMA networks. We formulate it as an optimization problem to maximize the network energy efficiency (EE) subject to quality-of-service (QoS) requirements, codebook assignment, power allocation, and subcarrier reuse constraints. Due to its mixed combinatory, we separate codebook assignment and power allocation...
To improve the poor locating performance of DV-Hop algorithm in calculating the distance of unknown nodes to beacon nodes, we present an improved DV-HOP localization algorithm on the basis of analyzing the error of beacon nodes' estimated distances and actual distances. This paper mainly focuses on two respects: Firstly, the average one-hop distance error of beacon nodes was modified. Secondly, considering...
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