Jammers characterized by their instantaneous frequencies can be effectively mitigated in direct sequence spread spectrum communications by using open-loop adaptive excision filters. The primary requirement for these filters is that they must possess a notch in tune with the jammer instantaneous frequency (IF) to annihilate the interference power at every time sample. The interference time-varying frequency can be obtained using existing IF estimators, including quadratic time-frequency distribution methods. Without focusing on any specific estimator, we develop expressions for the receiver performance using a general class of multiple-zero FIR excision filters and show the dependence of the bit error rate (BER) on the filter order and its group delay. The effect of inaccuracies in the jammer instantaneous frequency information on the receiver performance is considered and evaluated as a function of the filter notch bandwidth. The latter is defined by the filter zero multiplicity, which is shown to be an important factor in the analysis of the correlator signal-to-noise ratio (SNR).


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Performance analysis of instantaneous frequency-based interference excision techniques in spread spectrum communications


    Contributors:
    Wang, Chenshu (author) / Amin, M.G. (author)

    Published in:

    Publication date :

    1998


    Size :

    13 Seiten, 22 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English






    Self-encoded spread spectrum communications

    Nguyen, L. | Tema Archive | 1999


    Spread Spectrum Vehicle Communications Network

    Hockaday, S. / Gerfen, J. B. / Hartin, W. J. et al. | British Library Conference Proceedings | 1994