343 research outputs found
Polynomial Moment Relaxation for MIMO Detection
We develop a polynomial-time detector for maximum
likelihood (ML) detection over multiple-input multiple-output (MIMO) channels. Our proposed polynomial moment relaxation (PMR) detection gives a unified framework for MIMO detection with relaxation including semi-definite relaxation as a special case. We give three approaches to replace a finite alphabet constraint with a polynomial constraint. Since both the objective function and the constraints are polynomials, we use a moment relaxation approach by applying the dual theories of moments and positive polynomials solvable by semi-definite programming.
With different relaxation orders, our PMR achieve a flexible
trade-off between complexity and performance
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