Title :
Source Localization from Received Signal Strength Under Log-Normal Shadowing: Bias and Variance
Author :
Chitte, Sree Divya ; Dasgupta, Soura ; Ding, Zhi
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Iowa, Iowa City, IA, USA
Abstract :
This paper considers statistical issues of source localization from received signal strength (RSS) measurements affected by log-normal shadowing with focus on bias and variance. We characterize the class of all unbiased estimates of the source position and show that their error variances grow exponentially with the noise power. Finally, we propose an estimate the bias and error variance of which are both bounded in the noise power.
Keywords :
log normal distribution; signal processing; statistical analysis; RSS measurement; bias estimation; error variance; log-normal shadowing; noise power; received signal strength; source localization; source position; statistical analysis; unbiased estimate; Algorithm design and analysis; Cities and towns; Gaussian noise; Monitoring; Pervasive computing; Random variables; Sensor phenomena and characterization; Shadow mapping; Time difference of arrival; Wireless sensor networks;
Conference_Titel :
Image and Signal Processing, 2009. CISP '09. 2nd International Congress on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4129-7
Electronic_ISBN :
978-1-4244-4131-0
DOI :
10.1109/CISP.2009.5301003
