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A channel-sharing method was proposed to improve the bandwidth and energy efficiency per detection task in wireless sensor network. The sensor nodes transmitted their log-likelihood ratios (LLR) to the fusion center in approximately descending order of the absolute value of their LLRs by modifying the value of backoff timer and frame interval according to the values of their LLRs. Simulation results...
For wireless sensor network specialized in distributed detection application, communication power of each sensor should dedicate to improve the total detection performance of the system and its utilization should be energy efficient. There is a balance point for communication power. Above the point, it is difficult to improve the system's detection performance. Below it, it is easy to improve system's...
In the type-based distributed detection (TBDD for short) framework proposed recently, the type statistic of each sensor must be transmitted to a fusion center for making a final decision. The detection error probability using this approach is high when the transmission channel is highly noisy. Therefore, an approach combining TBDD with channel error detection was proposed to design a fault-tolerant...
To deal with the signal detection with multiple sensors under correlated K-distributed clutter with unknown parameter, a bootstrap based distributed detector (BBDD for short) was presented where detection decisions of local sensors are transmitted from each bootstrap detector to the data fusion center, where the overall decision is made based on k-out-of-N fusion rule. Considering the assumption that...
In practical mutisensor system, the signal-to-clutter ratio of the returns of the same target at different sensors may be unknown and variant, which leads to the nonexistence of the uniformly most powerful test. By investigating the demonstration of the nonexistence, it was found that the canonical detector based on the likelihood ratio test can not possess robust performance of detection. Therefore,...
The body of distributed detection theory is based on the common assumption that all sensors test the same resolution cell at the same time. However, for multiple monostatic radars that are far from one another, it is unreasonable to assume they have common resolution cell grid. Meanwhile, it is economically appealing to use existing radars to fulfil the distributed detection. Thus, we proposed a simple...
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