8[1]Urkowitz H.Energy Detection of Unknown Deterministic Signal[J].Pro.IEEE,1967,55(4):523-531.
9[2]Dillard R A.Detectability of Spread-Spectrum Signals[J].IEEE Trans.on AES,1979,15(4):526-537.
10[3]Davidovici S,Kanterrakis E G.Radiometric Detection of Direct-Sequence Spread-Spectrum Signal Using Interference Excision[J].IEEE Journal on SAIC,1989,7(4):576-588.