Semidefinite relaxation for detection of 16-QAM signaling in MIMO channels

被引：93

作者：

Wiesel, A ^{[1
]}

Eldar, YC ^{[1
]}

Shamai, S ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Dept Elect Engn, IL-32000 Haifa, Israel

来源：

IEEE SIGNAL PROCESSING LETTERS | 2005年 / 12卷 / 09期

基金：

以色列科学基金会;

关键词：

maximum likelihood detection; MIMO systems; semidefinite relaxation;

D O I：

10.1109/LSP.2005.853044

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We develop a computationally efficient approximation of the maximum likelihood (ML) detector for 16 quadrature amplitude modulation (16-QAM) in multiple-input multiple-output (MIMO) systems. The detector is based on a convex relaxation of the ML problem. The resulting optimization is a semidefinite program that can be solved in polynomial time with respect to the number of inputs in the system. Simulation results in a random MIMO system show that the proposed algorithm outperforms the conventional decorrelator detector by about 2.5 dB at high signal-to-noise ratios.

引用

页码：653 / 656

页数：4

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