Adaptive time-varying cancellation of wideband interferences inspread-spectrum communications based on time-frequencydistributions

Authors:
S. Barbarossa;A. Scaglione
Affiliations:
Dept. of Inf. & Commun., Rome Univ.;-
Venue:
IEEE Transactions on Signal Processing
Year:
1999

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Abstract

The paper proposes an adaptive method for suppressing wideband interferences in spread-spectrum (SS) communications. The proposed method is based on the time-frequency representation of the received signal from which the parameters of an adaptive time-varying interference excision filter are estimated. The approach is based on the generalized Wigner-Hough transform as an effective way to estimate the instantaneous frequency of parametric signals embedded in noise. The performance of the proposed approach is evaluated in the presence of linear and sinusoidal FM interferences plus white Gaussian noise in terms of the SNR improvement factor and bit error rate (BER)