DocumentCode
910064
Title
The minimum variance of estimates in quantum signal detection
Author
Helstrom, Carl W.
Volume
14
Issue
2
fYear
1968
fDate
3/1/1968 12:00:00 AM
Firstpage
234
Lastpage
242
Abstract
A quantum-mechanical form of the Cramér-Rao inequality is derived, setting a lower bound to the variance of an unbiased estimate of a parameter of a density operator. It is applied to the estimates of parameters such as amplitude, arrival time, and carrier frequency of a coherent signal as picked up by an ideal receiver in the presence of thermal noise. The estimation of parameters of a noise-like signal is also treated.
Keywords
Quantum estimation; Frequency estimation; Information theory; Laser radar; Optical noise; Optical receivers; Parameter estimation; Physics; Quantum mechanics; Signal detection; Signal processing;
fLanguage
English
Journal_Title
Information Theory, IEEE Transactions on
Publisher
ieee
ISSN
0018-9448
Type
jour
DOI
10.1109/TIT.1968.1054108
Filename
1054108
Link To Document