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The radiometer and its practical implementation

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1 Author(s)
Torrieri, D. ; U.S. Army Res. Lab., Adelphi, MD, USA

The radiometer or energy detector is useful in detecting target signals about which little is known. A practical radiometer is described and analyzed for the AWGN and Rayleigh channels with and without diversity combining. The practical implications of bandwidth, the number of samples processed, and imperfect noise-power estimation are examined. The radiometer has been criticized because of its alleged sensitivity to imperfect noise-power estimates. Conditions under which the noise-power estimation error is small are discussed. It is shown that the effects of this error on the probability of detection of the target signal can be kept small.

Published in:

MILITARY COMMUNICATIONS CONFERENCE, 2010 - MILCOM 2010

Date of Conference:

Oct. 31 2010-Nov. 3 2010