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This paper presents a modified interpolation-based QR decomposition algorithm for the grouped-ordering multipleinput multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. Based on the original research that integrates the calculations of the frequency-domain channel estimation and the QR decomposition for the MIMO-OFDM system, this study proposes a modified algorithm that possesses a scalable property to save the power consumption for interpolation-based QRdoi:10.1109/tcsi.2010.2092090 fatcat:3akjllo2dngq3eto2woh7bmus4