Efficient Channel-Adaptive MIMO Detection Using Just-Acceptable Error Rate
Journal
IEEE Transactions on Wireless Communications
Journal Volume
10
Journal Issue
1
Pages
73-83
Date Issued
2011-01
Author(s)
Abstract
This paper proposes a new concept of multiple-input multiple-output (MIMO) detection, aiming at minimizing the average computational cost. The detection methods are adapted according to the estimated channel state information to deliver just-acceptable error rate (JAER) performance. Error rate models for two popular MIMO detection algorithms are derived given the channel matrix. From these models, a channel-adaptive-MIMO (CA-MIMO) receiver with detector-switching strategies is proposed. Simulation results demonstrate that the proposed CA-MIMO detector meets the JAER criterion efficiently. Compared with the sophisticated Sphere Search (SS) MIMO detector, the average saving at moderate signal-to-noise ratio (SNR) is around 58% to 72%, depending on different modulation alphabets. At high SNR, the CA-MIMO detector almost always switch to Zero-Forcing (ZF) detection, where the complexity is several orders lower than the SS detector. © 2011 IEEE.
Subjects
error probability; just-acceptable error rate (JAER); maximum likelihood; MIMO detection; OFDM; sphere search; zero-forcing
Other Subjects
Error probabilities; just-acceptable error rate (JAER); MIMO detection; OFDM; Zero-forcing; Error detection; Maximum likelihood; MIMO systems; Orthogonal functions; Probability; Signal to noise ratio; Spheres; Detectors
Type
journal article