Abstract: Focusingonthepassiveintermodulation(PIM)probleminspreadspectrumschemeTT&Clink,awaveletpacketdecompositionbasedfullblindPIMsuppressionalgorithmwasproposed.MultilayerswaveletpacketdecompositionwasemployedonthereceivedspreadspectrumTT&Csignals,accordingtothecharacteristicthedecomposedsignalshouldobeyGaussiandistribution,andinterferencesuppressionwasachieved,NosuppressiongatewassetduringthewholeprocessandthiswasafullblindPIMsuppressedalgorithm.Finally,Matlabsimulationresultshowsthat7dBsignalinterferenceratiogaincanbeobtained.

Key words: TT&Clink, spreadspectrum, passiveintermodulation, waveletpacket, interferencesuppression