Adaptive quantization for distributed estimation in cluster-based wireless sensor networks

作者：Liu, Guiyun^*; Xu, Bugong; Chen, Hongbin; Zhang, Chunliang; Xiang, Jianhua; Zhou, Chao

来源：AEU-International Journal of Electronics and Communications, 2014, 68(6): 484-488.

DOI：10.1016/j.aeue.2013.12.004

• Sensor network
• Distributed estimation
• Cluster
• Quantization

In this paper, the problem of parameter estimation in cluster-based wireless sensor networks is studied. Particularly, we focus on how to choose a suitable threshold in the one-bit adaptive quantization scheme. An adaptive quantization scheme for parameter estimation in cluster-free sensor networks is extended to this scenario. Intra-cluster and inter-cluster maximum likelihood estimators (MLEs) as well as the corresponding Cramer-Rao lower bounds (CRLBs) are derived. Due to the energy constraint of sensors, the performance-energy tradeoff of parameter estimation is also investigated. Simulation results show that parameter estimation in cluster-based sensor networks with adaptive quantization can be more energy-efficient than that-in cluster-free sensor networks, while achieving close performance as the number of sensors increases.

• 出版日期2014
• 单位华南理工大学; 桂林电子科技大学; 广州大学