Least Squares Interpolation Methods for LTE System Channel Estimation Over Extended ITU Channels

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Provided by: International Journal of Information and Electronics Engineering
Topic: Mobility
Format: PDF
Performance of pilot-aided channel estimation techniques such as the Least Squares (LS) method depends on not only on the Signal-to-Noise Ratio (SNR), channel conditions and pilot ratio, but also on the choice of interpolation method for deriving channel estimates at non-pilot subcarriers. In this paper, the authors investigate the Bit-Error-Rate (BER) performance of linear, spline and Piecewise Cubic Hermite Interpolating Polynomial (PCHIP) interpolation methods in LS channel estimation over the three extended ITU channel profiles defined for Long Term Evolution (LTE) testing.
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