Method for the Detection of Carrierin-Carrier Signals Based on Fourth-Order Cumulants

Abstract

The method for the detection of Carrier-in-Carrier signals based on the calculation of fourthorder cumulants is proposed. In accordance with the methodology based on the "Area under the curve" (AUC) parameter, a threshold value for the decision rule is established. It was found that the proposed method provides the correct detection of the sum of QPSK signals for a wide range of signal-to-noise ratios. The obtained AUC value indicates the high efficiency of the proposed detection method. The advantage of the proposed detection method over the "radiuses" method is also shown.

GNSS Interference Suppression Techniques: A Survey

“…The first proposed technique is to design a post correlation two-stage filter in the GPS receiver to optimize the acquisition of GPS signal in the presence of interference, and to detect the presence of spoofing; the first stage filter is to detect the presence of spoofing, or we can say in other words detection of carrier in carrier by calculating the fourth joint cumulant of the received signal and its conjugate, by comparing the cumulant with threshold. If the value of the cumulant exceeds the limits the decision is the absence of spoofing, and if the value does not exceed the threshold the decision is presence of spoofing [31]. The second stage filter is to get the optimal acquisition of GPS signal in the presence of powerful interference by calculating the cross-ambiguity function (CAF) by searching the maximum range instead of maximum cell value for each doppler frequency in CAF, and then calculating the sum of distances for each doppler frequency [32].…”