Joint Clock Synchronization and Ranging: Asymmetrical Time-Stamping and Passive Listening

被引：43

作者：

Chepuri, Sundeep Prabhakar ^{[1
]}

Rajan, Raj Thilak ^{[1
,2
]}

Leus, Geert ^{[1
]}

van der Veen, Alle-Jan ^{[1
]}

机构：

[1] Delft Univ Technol, Fac Elect Engn Math & Comp Sci, Delft, Netherlands

[2] Netherlands Inst Radio Astron ASTRON, Dwingeloo, Netherlands

来源：

IEEE SIGNAL PROCESSING LETTERS | 2013年 / 20卷 / 01期

关键词：

Clock synchronization; clock-offset; clock-skew; wireless sensor networks; SENSOR NETWORKS;

D O I：

10.1109/LSP.2012.2222371

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A fully asynchronous network with one sensor and anchors (nodes with known locations) is considered in this letter. We propose a novel asymmetrical time-stamping and passive listening (ATPL) protocol for joint clock synchronization and ranging. The ATPL protocol exploits broadcast to not only reduce the number of active transmissions between the nodes, but also to obtain more information. This is used in a simple estimator based on least-squares (LS) to jointly estimate all the unknown clock-skews, clock-offsets, and pairwise distances of the sensor to each anchor. The Cramer-Rao lower bound (CRLB) is derived for the considered problem. The proposed estimator is shown to be asymptotically efficient, meets the CRLB, and also performs better than the available clock synchronization algorithms.

引用

页码：51 / 54

页数：4

共 6 条

[1] Fundamentals of Large Sensor Networks: Connectivity, Capacity, Clocks, and Computation [J].

Freris, Nikolaos M. ;

Kowshik, Hemant ;

Kumar, P. R. .

PROCEEDINGS OF THE IEEE, 2010, 98 (11) :1828-1846

[2] A new approach for time synchronization in Wireless Sensor Networks: Pairwise broadcast synchronization [J].

Noh, Kyoung-Lae ;

Serpedin, Erchin ;

Qaraqe, Khalid .

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2008, 7 (09) :3318-3322

[3] Locating the nodes [J].

Patwari, N ;

Ash, JN ;

Kyperountas, S ;

Hero, AO ;

Moses, RL ;

Correal, NS .

IEEE SIGNAL PROCESSING MAGAZINE, 2005, 22 (04) :54-69

[4]

Rajan R. T., 2011, 2011 4th IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), P297, DOI 10.1109/CAMSAP.2011.6136008

[5] Robust Time-Based Localization for Asynchronous Networks [J].

Wang, Yiyin ;

Ma, Xiaoli ;

Leus, Geert .

IEEE TRANSACTIONS ON SIGNAL PROCESSING, 2011, 59 (09) :4397-4410

[6] Clock Synchronization of Wireless Sensor Networks [J].

Wu, Yik-Chung ;

Chaudhari, Qasim ;

Serpedin, Erchin .

IEEE SIGNAL PROCESSING MAGAZINE, 2011, 28 (01) :124-138

← 1 →