Bit Error Probability for Pilot-Symbol-Aided OFDM Channel Estimation in Doubly-Selective Channels

Konferenz: WSA 2014 - 18th International ITG Workshop on Smart Antennas
12.03.2014 - 13.03.2014 in Erlangen, Germany

Tagungsband: ITG-Fb. 247: WSA 2014

Seiten: 6Sprache: EnglischTyp: PDF

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Nissel, Ronald; Lerch, Martin; Šimko, Michal; Rupp, Markus (Institute of Telecommunications, Vienna University of Technology, Vienna, Austria)

In this paper, we derive a closed-form expression for the Bit Error Probability (BEP) of an orthogonal frequencydivision multiplexing system that utilizes pilot-symbol-aided channel estimation. We assume Rayleigh fading, additive white Gaussian noise, and that the interpolation is linear but otherwise completely arbitrary. It is shown that the minimum mean squared error interpolation also minimizes the BEP. For a Signal-to-Interference Ratio (SIR) smaller than the signal-to-noise ratio, simulations confirm our analytical results. However, for higher SIR they exhibit differences because the inter-carrier interference is not normally distributed, violating our assumptions.