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arXiv 1205.6907cs.ITmath.IT
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分布式估计的最优恒等二进制量化器设计

Optimal Identical Binary Quantizer Design for Distributed Estimation

Swarnendu Kar, Hao Chen, Pramod K. Varshney

摘要:

我们考虑传感器网络中分布式估计的相同的一位概率量化器的设计。我们假设参数范围是有限的和已知的,并使用最大的Cramér-Rao下限(CRB)的参数范围作为我们的性能指标。我们限制我们的理论分析类反对称量化器,并确定了一组条件的概率量化函数大大简化。我们确定了广泛的一类噪声分布,其中包括高斯噪声在低信噪比制度,经常使用的阈值量化器被发现是最小最大最优的。借助于理论结果,我们制定了一个优化问题,以获得最佳的minimax CRB量化器。对于广泛的噪声分布,我们证明了新的量化器的优越性能-特别是在中等到高信噪比制度。

英文摘要:

We consider the design of identical one-bit probabilistic quantizers for distributed estimation in sensor networks. We assume the parameter-range to be finite and known and use the maximum Cramér-Rao Lower Bound (CRB) over the parameter-range as our performance metric. We restrict our theoretical analysis to the class of antisymmetric quantizers and determine a set of conditions for which the probabilistic quantizer function is greatly simplified. We identify a broad class of noise distributions, which includes Gaussian noise in the low-SNR regime, for which the often used threshold-quantizer is found to be minimax-optimal. Aided with theoretical results, we formulate an optimization problem to obtain the optimum minimax-CRB quantizer. For a wide range of noise distributions, we demonstrate the superior performance of the new quantizer - particularly in the moderate to high-SNR regime.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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