New asymptotics for performance of energy detector
Global Communications Conference(2014)
摘要
Performance analysis of the energy detector (ED) in fading channels has received enormous attention recently. However, averaging the generalized Marcum-Q function over fading statistics often results in complicated special functions and/or infinite series based expressions. Motivated by the need for simple expressions without compromising the accuracy, we propose a new representation for the probability density function (PDF) of the fading channel gain. This representation is then used to derive simple, unified expression for asymptotic miss-detection probability in closed-form. The derived expression is evaluated for several fading channels and antenna diversity schemes. Numerical results reveal its high accuracy over a wide range of signal-to-noise-ratio (SNR) (as low as 0 dB) unlike the existing asymptotic expression which is accurate only for high SNR regime (say, SNR ≥ 20 dB).
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关键词
antennas,diversity reception,fading channels,probability,series (mathematics),signal detection,ED,Marcum-Q function,PDF,SNR,antenna diversity scheme,asymptotic missdetection probability,energy detector performance,fading channel,fading statistics,infinite series based expression,probability density function,signal-to-noise-ratio,Energy detector,diversity combining,fading
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