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In this paper, we study efficient data collection and aggregation problem in wireless sensor networks. We first propose efficient distributed algorithms for data collection problem with approximately the minimum delay, or the minimum number of messages to be sent by all wireless nodes, or the minimum total energy consumption by all wireless nodes respectively. For example, given an algorithm A for...
The non-line-of-sight (NLOS) transmission of signal enlarges location error greatly.To reduce the influence of NLOS,people proposed several algorithms,among which residual test (RT) is an efficient one.However,the algorithm complexity of RT is high,which makes it hard to be used in practical.In this paper,we propose an algorithm simplified residual test (SRT) to reduce RTpsilas algorithm complexity...
Consider a downlink multicast scenario where a base station equipped with multiple antennas wishes to simultaneously broadcast a number of signals to some given groups of users over a common bandwidth. The goal of the base station is to select appropriate beamforming vectors so as to maximize the minimum signal-to-interference-plus-noise ratio (SINR) among all users under a power budget constraint...
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