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This paper investigates a listen before talk (LBT) algorithm to realize both collision avoidance with nodes of other wireless systems/operators and one-cell reuse operation among nodes of the same operator for long term evolution (LTE) based licensed-assisted access (LAA) in unlicensed spectrum. When LTE system is operated in unlicensed spectrum, implementation of a LBT algorithm is required to not...
This paper presents a controller design of an electric wheelchair for avoiding collision and downhill turning. The presented method for collision avoidance is based on the information from inexpensive distance sensors so that it may be widely used at low implementation cost. The presented method considers the nonholonomic constraints of a typical differential wheel drive system by employing the model...
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