MIMO-Aided Near-Capacity Turbo Transceivers: Taxonomy and Performance versus Complexity

• Published in: IEEE Communications surveys and tutorials Vol. 14; no. 2; pp. 421 - 442
• Main Authors: Sugiura, S., Sheng Chen, Hanzo, L.
• Format: Journal Article
• Language: English
• Published: IEEE 01.01.2012
• Subjects: Computational complexity; Detectors; EXIT chart; iterative detection; Markov processes; MIMO; Multiplexing; multiuser detection; Niobium; turbo coding; wireless communication
• ISSN: 1553-877X
• DOI: 10.1109/SURV.2011.032511.00136

In this treatise, we firstly review the associated Multiple-Input Multiple-Output (MIMO) system theory and review the family of hard-decision and soft-decision based detection algorithms in the context of Spatial Division Multiplexing (SDM) systems. Our discussions culminate in the introduction of a range of powerful novel MIMO detectors, such as for example Markov Chain assisted Minimum Bit-Error Rate (MC-MBER) detectors, which are capable of reliably operating in the challenging high-importance rank-deficient scenarios, where there are more transmitters than receivers and hence the resultant channel-matrix becomes non-invertible. As a result, conventional detectors would exhibit a high residual error floor. We then invoke the Soft-Input Soft-Output (SISO) MIMO detectors for creating turbo-detected two- or three-stage concatenated SDM schemes and investigate their attainable performance in the light of their computational complexity. Finally, we introduce the powerful design tools of EXtrinsic Information Transfer (EXIT)-charts and characterize the achievable performance of the diverse near-capacity SISO detectors with the aid of EXIT charts.