Research Article
An Extended Semidefinite-Relaxation Method for MIMO Detection of High-Order QAM Signals
@INPROCEEDINGS{10.1109/CHINACOM.2009.5339927, author={Shu Cai and Kehu Yang}, title={An Extended Semidefinite-Relaxation Method for MIMO Detection of High-Order QAM Signals}, proceedings={ChinaCom2009-Signal Processing for Communications Symposium}, publisher={IEEE}, proceedings_a={CHINACOM2009-SPC}, year={2009}, month={11}, keywords={}, doi={10.1109/CHINACOM.2009.5339927} }- Shu Cai
Kehu Yang
Year: 2009
An Extended Semidefinite-Relaxation Method for MIMO Detection of High-Order QAM Signals
CHINACOM2009-SPC
IEEE
DOI: 10.1109/CHINACOM.2009.5339927
Abstract
In this paper, we propose an extended semidefinite-relaxation (SDR) method for multiple-input multiple-output (MIMO) detection of high-order QAM signals. In the proposed method, high-order QAM constellations are represented by an equivalent virtually-antipodal form. Based on this form, the alphabet relaxation components in the existing SDR formulation can be constrained to the original alphabet set by additional inequalities. Simulation results demonstrate that the extended SDR method provides an alternative to the existing SDR algorithm of with compact formulation for arbitrary constellations.
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