Semidefinite Relaxations for MIMO Transmissions With High-Order QAM Constellations


In this letter, simple semidefinite relaxations are proposed for the detection of high-order quadrature amplitude modulations in multiple-input–multiple-output systems. The detector is based on the addition of several convex and concave quadratic inequality constraints into the maximum-likelihood detector before relaxing the problem into a convex one… (More)
DOI: 10.1109/LSP.2016.2576640

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