To allow multiple-access between small earth terminals and a satellite hub in a fully unsynchronized manner, the authors present a hub receiver which uses iterative interference cancelation on the physical-layer to separate the traffic. Instead of approaches like Contention Resolution Diversity Slotted ALOHA, which operates on the data-link layer, the receiver presented allows for interference cancelation within one time slot. While the general structure of the hub receiver was already introduced in [7] and [8], the estimation and equalization of channel impairments like sampling-clock offsets as well as carrier frequency offsets are targeted here. The system model is introduced briefly and channel estimation and equalization approaches are presented. For channel estimation the authors recommend a correlation-based channel tap estimator which uses the preamble as well as received and corrected data as pilots for better channel estimation in subsequent iterations. To equalize channel impairments two kinds of single-tap equalizers are investigated. The impact of the estimation and equalization approaches on the bit error rate performance of the system in comparison to previous investigated scenarios where the channel was assumed known are studied [8].


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Channel Estimation for a Multi-User System with Iterative Interference Cancelation


    Contributors:


    Publication date :

    2019-03-01


    Size :

    2376264 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




    Efficient random multiple-access using iterative interference cancelation receivers

    Grinewitschus, Lukas / Schlegel, Christian | IEEE | 2018


    Adaptive algorithms for interference cancelation in multi-user communications systems

    Bar-Ness, Y. / IEEE; Vehicular Technology/Communications Society / IEEE; Benelux Section | British Library Conference Proceedings | 1993


    Adaptive interference cancelation using a pair of magnetometers

    Sheinker, Arie / Moldwin, Mark B. | IEEE | 2016


    Iterative interference mitigation and channel estimation for LDACS1

    Li, Qiaoyu / Zhang, Jun / Xie, Jindong et al. | IEEE | 2014