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The energy leakage from non-sampled-spaced multipath time delays results in the degradation for the discrete Fourier transform (DFT)-based channel estimation method. The leakage effect escalates when virtual subcarriers are reserved to ease the filter requirements in OFDM systems. To alleviate the leakage effect, a novel windowed DFT-based channel estimation method by adding virtual channel frequency...
In this paper, we propose a method to design equiripple FIR interpolation filter. The proposed method is based on weighted least squares technique. The weighted least squares solution will be equiripple by updating frequency response weighting function to get a suitable weighting function. Furthermore, via extensive computational study of the relationships among filter parameters for equiripple interpolation...
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