Title :
A Fast Suboptimal Algorithm for Detection of 16-QAM Signaling in MIMO Channels
Author :
Park, Soonchul ; Zhang, Hongchao ; Han, Dong Seog ; Kim, Jim ; Kang, Eun Su ; Hager, William W.
Author_Institution :
Kyungpook National University, Daegu, Republic of Korea
Abstract :
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 solving a convex relaxation of the ML problem by an affine-scaling cyclic Barzila-Borwein method for box constrained optimization. Simulation results in a random MIMO system show that this proposed approach outperforms the conventional decorrelator detector and is similar to the semidefinite relaxation (SDR) detector. However, we should note that the complexity of the proposed approach is less than that of those detectors. In the case of 8 antennas and 4 users, about 99% fewer computations are required than the SDR and ML detectors.
Keywords :
Computational complexity; Constraint optimization; Decision feedback equalizers; Decorrelation; Detection algorithms; Detectors; MIMO; Maximum likelihood detection; Maximum likelihood estimation; Signal detection;
Conference_Titel :
Military Communications Conference, 2007. MILCOM 2007. IEEE
Conference_Location :
Orlando, FL, USA
Print_ISBN :
978-1-4244-1513-7
Electronic_ISBN :
978-1-4244-1513-7
DOI :
10.1109/MILCOM.2007.4454878
