北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (5): 28-31.doi: 10.13190/jbupt.200905.28.huangzh

• 论文 • 上一篇    下一篇

无线传感器网络下中继辅助的分布式估计策略

黄振,温志刚,乐光新   

  1. (北京邮电大学 无线通信系统与网络实验室, 北京 100876)
  • 收稿日期:2009-03-12 修回日期:2009-05-11 出版日期:2009-10-28 发布日期:2009-10-28
  • 通讯作者: 黄振

Relay-Aided Decentralized Estimation in Wireless Sensor Networks

HUANG Zhen,\ WEN Zhigang,\ YUE Guang-xin   

  1. (Laboratory of Wireless Communication Systems and Networks, Beijing Uni
    versity of Posts and Telecommunications, Beijing 100876, China)
  • Received:2009-03-12 Revised:2009-05-11 Online:2009-10-28 Published:2009-10-28
  • Contact: HUANG Zhen

摘要:

与传统的星形拓扑结构下无中继辅助估计策略相比,新颖的中继辅助分布式参数估计(RADE)
策略能利用中继节点协作传输,提高系统估计性能,对传输能量和处理能力受限的无线传感
器网络有极大帮助. 根据中继节点的信号处理方式,分为放大转发(AF)和估计转发(EF)2种
中继辅助分布式估计策略. 通过凸优化算法得到上述2种估计策略的闭式解. 仿真结果表明
,此策略能在不额外占用带宽的情况下提供更好的估计性能.

关键词: 放大转发, 估计转发, 中继辅助, 分布式估计

Abstract:

The decentralized estimation of a noise-corrupted deterministic parameter in wireless sensor networks with the aid of relay is considered. A new relayaided decentralized estimation (RADE) scheme is proposed, by which relay collects the overheard messages from sensors and sends the locally processed message to a destination. Amplify-and-forward (AF) and estimate-and-forward (EF) strategies are proposed and the corresponding closed-form solutions are derived. Numerical simulation shows the proposed strategies can provide better estimation performance without any bandwidth loss.

Key words: amplify-and-forward, estimateandforward, relayaided, decentralized estimation