Semidefinite Programming Relaxation Based Virtually Antipodal Detection for MIMO Systems Using Gray-Coded High-Order QAM

An efficient generalized Semi-Definite Programming Relaxation (SDPR) based Virtually Antipodal (VA) detection approach is proposed for Gray-coded high-order rectangular Quadrature Amplitude Modulation (QAM) signalling over Multiple-Input - Multiple-Output (MIMO) channels. Albeit the decomposition of symbol-based detection to a bit-based one is desirable owing to its reduced complexity and increased flexibility, Gray-mapping is nonlinear, and hence the direct bit-based detection of Gray-coded-QAM MIMO systems constitutes a challenging problem. In this paper, the authors find a way of exploiting the structural regularity of Gray-coded high-order rectangular QAM, and transforms the classic symbol-based MIMO detection model to a low-complexity bit-based detection model.

Provided by: Institute of Electrical & Electronic Engineers Topic: Mobility Date Added: Dec 2012 Format: PDF

Find By Topic