Orthogonal Frequency Division Multiplexing (OFDM) is a rapidly growing technology in digital communications. OFDM performance is degraded by impulsive noise which can be mitigated by introducing different non-linearity schemes at the OFDM receiver like clipping, nulling, hybrid clipping-nulling and replacement. Clipping and nulling are the simplest schemes. Hybrid clipping-nulling combines the advantages of both clipping and nulling and performs better than the other schemes. Replacement scheme defines the clipping level equal to the average of the transmitted signal and gives comparable results as hybrid clipping-nulling. This article reviews some impulsive noise mitigation schemes suggested in literature and proposes a new scheme, known as hybrid median-nulling, which clips the signal values at the level defined by median of the received signal samples. Simulation results show that the proposed scheme results in better signal to noise ratio and symbol error rate as compared to other schemes.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Hybrid median-nulling scheme for impulsive noise mitigation in OFDM transmission


    Contributors:
    Ali, Zehra (author)


    Publication date :

    2015-09-01


    Size :

    383679 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Optimization of Impulsive Noise Mitigation Scheme for PAPR Reduced OFDM Signals over Powerline Channels

    Anoh, Kelvin / Adebisi, Bamidele / Rabie, Khaled M. et al. | IEEE | 2018


    Robust switching vector median filter for impulsive noise removal

    Celebi, M.E. / Aslandogan, Y.A. | British Library Online Contents | 2008



    Self Nulling Hybrid Maglev Suspension System

    Herbermann, R. | British Library Conference Proceedings | 1993