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The QR-OSIC receiver design for the transmitter-side power allocated MIMO system. Based on the properties of the function and ordering results, the authors develop the efficient ordering algorithms in combination with the PA scheme. From the convexity of the -function, they derive the ordering strategy that makes the channel gains converge to their geometric mean. Based on this approach, the fixed ordering algorithm is first designed, for which the geometric mean is used for a constant threshold. To further improve the performance, the modified scheme employing adaptive thresholds is developed using the correlation among ordering results.
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