On Received-Signal-Strength Based Localization with Unknown Transmit Power and Path Loss Exponent

Author

Wang, Gang ; Chen, H. ; Li, Youming ; Jin, Ming

Author_Institution

Coll. of Inf. Sci. & Eng., Ningbo Univ., Ningbo, China

Volume

1

Issue

5

fYear

2012

fDate

10/1/2012 12:00:00 AM

Firstpage

536

Lastpage

539

Abstract

In this letter, we consider the received-signal-strength (RSS) based localization problem with unknown transmit power and unknown path loss exponent (PLE). For the case of unknown transmit power, we derive a weighed least squares (WLS) formulation to jointly estimate the sensor node location and the transmit power, based on the unscented transformation (UT). For the case of unknown PLE, we propose an alternating estimation procedure to alternatively estimate the sensor node location and the PLE. The estimation procedure can also be applied to the case when both the transmit power and the PLE are unknown. Simulation results confirm the effectiveness of the proposed method.

Keywords

least squares approximations; sensor placement; wireless sensor networks; PLE; RSS based localization problem; UT; WLS; path loss exponent; received-signal-strength based localization; sensor node location estimation; unknown transmit power estimation; unscented transformation; weighed least square formulation; wireless sensor networks; Complexity theory; Least squares approximation; Maximum likelihood estimation; Wireless communication; Wireless sensor networks; Localization; path loss exponent (PLE) estimation; received signal strength (RSS); transmit power estimation; weighted least squares (WLS);

fLanguage

English

Journal_Title

Wireless Communications Letters, IEEE

Publisher

ieee

ISSN

2162-2337

Type

jour

DOI

10.1109/WCL.2012.072012.120428

Filename

6248140