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In this letter, we derive a low-complexity channel estimation scheme for multiple-input multiple-output multiband orthogonal frequency division multiplexing ultrawideband (MIMO MB-OFDM UWB) system over spatially correlated channel. More precisely, we drive a linear minimum mean-squared-error (LMMSE) channel estimation algorithm. Then, an optimal low-rank LMMSE channel estimation method based on low-rank...
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