Abstract
The spatial relationship between the tag and the reader plays a great role in the performance of passive LANDMARC system. Since it is not easy to change the assignment of the whole reference tags frequently, most research aims at searching for the optimal deployment of readers. Instead of providing the exact RSSI values, the readers in passive system only can provide discrete power grades. In this paper, the detection radius under given power grade is discussed first. Then we explore the power grade management of the reader and propose the time consuming model for the passive LANDMARC, which leads to an objective function suffered from the position of readers. Finally, an enhanced particle swarming optimization algorithm is brought up to find the optimal deployment that bears the least time consuming. Simulation result showed that, the proposed solution provides a better design compared with the uniform deployment.
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