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The radiometer and its practical implementation

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1 Author(s)
Don Torrieri ; U.S. Army Research Laboratory Adelphi, MD

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.

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Date of Conference:

Oct. 31 2010-Nov. 3 2010