Lm. Garth et Y. Bresler, THE DEGRADATION OF HIGHER-ORDER SPECTRAL DETECTION USING NARROW-BAND PROCESSING, IEEE transactions on signal processing, 45(7), 1997, pp. 1770-1784
In certain scenarios, higher order statistic (NOS)-based detectors exp
loiting the Gaussian noise rejection property of HOS have been shown t
o have performances superior to widely used second-order (SOS) techniq
ues, However, a crucial limitation on these detectors that has not bee
n addressed is a constraint on the processing bandwidth, We study the
effects of commonly used narrowband processing on those detectors, As
the processing bandwidth is decreased, we characterize the tradeoff be
tween HOS and SOS detectors and demonstrate that the performance of HO
S defectors degrades faster than that of SOS ones, We then consider di
stributed wideband detection by a bank of local narrowband detectors w
hose decisions are fused together, given a fixed-bandwidth input signa
l, we show that as the number of local detectors increases, correspond
ing to a decreasing amount of bandwidth for each local detector, the p
erformance of such a scheme using HOS local detectors degrades more qu
ickly than a scheme using SOS ones.