ZHAO Zhi-jin, WU Jia, XU Chun-yun, et al. The Study on the Detection Methods of DSSS/QPSK Signal Based on the Fourth-Order Cumulants[J]. Acta Electronica Sinica, 2007, 35(6): 1046-1049.
ZHAO Zhi-jin, WU Jia, XU Chun-yun, et al. The Study on the Detection Methods of DSSS/QPSK Signal Based on the Fourth-Order Cumulants[J]. Acta Electronica Sinica, 2007, 35(6): 1046-1049.DOI:
According to the fact that the fourth-order cumulant of the Gaussian White Noise is equal to zero
the fourth-order cumulant of the DSSS/QPSK signal is studied and the time domain and frequency domain detection methods based on the fourth-order cumulant different slices c
4x
(0
0
0)、c
4x
(τ
τ
τ)、c
4x
(0
τ
τ) and c
4x
(0
0
τ) are proposed.Experimental results show that the detection performance of the method in frequency domain is better than that of the method in time domain.Trading off the detection performance and realization difficulty
the frequency domain detection method based on c
4x
(0
0
τ) is the best.When the false alarm probability is set to 1%
its detection probability reaches above 50% at SNR -11dB.The proposed meth