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    Channel estimation for stationary fading channels: orthogonal versus superimposed pilots

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    Publication date
    2014
    Author
    Asyhari, A.Taufiq
    ten Brink, S.
    Keyword
    Fading; Signal to noise ratio; Channel estimation; Transmitting antennas; Vectors; MIMO; Data communication
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    Two training schemes namely the orthogonal pilot scheme (OPS) and the superimposed pilot scheme (SPS) are compared in terms of achievable rates in multiple-antenna fading channels with memory. For both schemes, we show that the achievable rate depends on the number of antennas, signal-to-noise ratio (SNR) and fading speed via the channel estimation error variance and the fraction of time for data transmission. To guarantee positive achievable rates, we show that for the OPS the number of transmit antennas that can be accommodated is limited by the fading speed whereas for the SPS the number of antennas can be arbitrary. For most antenna configurations, we observe that while the SPS is superior in the low-SNR and fastfading regimes, the OPS is superior in other regimes. However, for a few number of antennas (e.g., single antenna), the SPS may also be superior in the low-SNR and slow-fading regimes.
    URI
    http://hdl.handle.net/10454/10595
    Version
    No full-text available in the repository
    Citation
    Asyhari AT and ten Brink S (2014) Channel estimation for stationary fading channels: orthogonal versus superimposed pilots. In: 11th International Symposium on Wireless Communications Systems (ISWCS). 26-29 Aug 2014, Barcelona, Spain: 70-74.
    Link to publisher’s version
    https://doi.org/10.1109/ISWCS.2014.6933322
    Type
    Conference Paper
    Collections
    Engineering and Informatics Publications

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