Title :
Rician envelope estimation and confidence intervals in low signal/noise levels
Author :
Stewart, Brian G. ; Simmons, J.F.L.
Author_Institution :
Robert Gordon´s Institute of Technology, School of Electronic & Electrical Engineering, Aberdeen, UK
Abstract :
The determination of a Rician signal envelope in low signal/noise is a biased estimate of the true (noiseless) envelope. Four statistical estimators which attempt to correct for the biasing are investigated, namely the maximum likelihood, most probable, mean and median estimators. Confidence intervals on the envelope estimation are also presented at the 68%, 95% and 99% confidence levels.
Keywords :
radiocommunication; random noise; signal detection; signal processing; Rician envelope estimation; Rician signal envelope; SNR; confidence intervals; low signal/noise levels; maximum-likelihood estimator; mean estimator; median estimators; most probable estimator; statistical estimators;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870589
