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MIMO Soft Near-ML Demodulation with Fixed Low-Complexity Candidate Selection

Title
MIMO Soft Near-ML Demodulation with Fixed Low-Complexity Candidate Selection
Authors
Choi, Ji-WoongLee, JungwonChoi, Jihwan P.Lou, Hui-Ling
DGIST Authors
Choi, Ji-Woong
Issue Date
2012-09
Citation
IEICE Transactions on Communications, E95B(9), 2884-2891
Type
Article
Article Type
Article
Keywords
Bit-to-Symbol MappingCandidate SelectionComplex MultiplicationComputer SimulationDecodingDemodulationDistance CalculationEuclidean DistanceLikelihood InformationLow-ComplexityMIMO SystemsMultiple-Input-Multiple-Ouput (MIMO)Near-ML (Maximum Likelihood) DemodulationNear-Optimal PerformanceOptical Variables MeasurementRegular StructureSoft Decoding
ISSN
0916-8516
Abstract
In this paper, we propose a soft-decoding near-MLMIMO demodulation scheme that achieves near optimal performance with fixed and low complexity. Exploiting the regular structure of bit-to-symbol mapping, the proposed scheme performs hard demodulation to find the first candidate symbol for each stream followed by selection of nearby candidate points such that at least one candidate exists for the computation of likelihood information of bit 0 and 1 without intermediate calculation of the Euclidean distance. This demodulation scheme enables an improvement in performance by guaranteeing the existence of candidates and a significant reduction in the number of distance calculations which is a major complexity burden. The performance is evaluated by computer simulation, and computational complexity is also assessed in terms of the number of complex multiplication. Copyright © 2012 The Institute of Electronics, Information and Communication Engineers.
URI
http://hdl.handle.net/20.500.11750/5350
DOI
10.1587/transcom.E95.B.2884
Publisher
Institute of Electronics, Information and Communication Engineers
Related Researcher
  • Author Choi, Ji Woong CSP(Communication and Signal Processing) Lab
  • Research Interests Communication System; Signal Processing; Communication Circuit Design; 생체 신호 통신 및 신호 처리; 뇌-기계 인터페이스(BMI); 차세대 교차계층 통신 및 신호 처리; 5G 모바일 통신
Files:
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Collection:
Department of Information and Communication EngineeringCSP(Communication and Signal Processing) Lab1. Journal Articles


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