Roger Varea, S.; Gonzalez, A.; Almenar Terré, V.; Matz, G. (2012). An efficient fixed-complexity sphere decoder with quantized soft outputs. IEEE Communications Letters. 16(11):1828-1831. https://doi.org/10.1109/LCOMM.2012.091712.121702
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/47021
Title:
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An efficient fixed-complexity sphere decoder with quantized soft outputs
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Author:
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Roger Varea, Sandra
Gonzalez, Alberto
Almenar Terré, Vicenç
Matz, Gerald
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UPV Unit:
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Universitat Politècnica de València. Instituto Universitario de Telecomunicación y Aplicaciones Multimedia - Institut Universitari de Telecomunicacions i Aplicacions Multimèdia
Universitat Politècnica de València. Departamento de Comunicaciones - Departament de Comunicacions
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Issued date:
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Abstract:
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In practical multiple-input multiple-output bit-interleaved-coded-modulation (MIMO-BICM) systems, demodulators have to deliver finite word-length (quantized) log-likelihood-ratios (LLRs). In this letter, we propose an ...[+]
In practical multiple-input multiple-output bit-interleaved-coded-modulation (MIMO-BICM) systems, demodulators have to deliver finite word-length (quantized) log-likelihood-ratios (LLRs). In this letter, we propose an efficient modification of the fixed-complexity sphere decoder for MIMO-BICM systems working with quantized LLRs. Our approach reduces the complexity of previously proposed schemes via pruning strategies that exploit the clipping and quantization of LLRs. Numerical results confirm that our scheme achieves a significant complexity reduction (by 37% for the case of 2 bits per LLR and by 31% for the case of 3 bits per LLR) with negligible degradation in bit error rate performance.
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Subjects:
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MIMO-BICM
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FSD
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LLR quantization
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MIMO communication
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Copyrigths:
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Cerrado |
Source:
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IEEE Communications Letters. (issn:
1089-7798
)
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DOI:
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10.1109/LCOMM.2012.091712.121702
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Publisher:
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Institute of Electrical and Electronics Engineers (IEEE)
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Publisher version:
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http://dx.doi.org/10.1109/LCOMM.2012.091712.121702
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Project ID:
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info:eu-repo/grantAgreement/FWF//S10606/
info:eu-repo/grantAgreement/Generalitat Valenciana//PROMETEO09%2F2009%2F013/ES/Computacion de altas prestaciones sobre arquitecturas actuales en porblemas de procesado múltiple de señal/
info:eu-repo/grantAgreement/MICINN//TEC2009-13741/ES/Spatial Audio Systems Based On Massive Parallel Processing Of Multichannel Acoustic Signals With General Purpose-Graphics Processing Units (Gp-Gpu) And Multicores/ /
info:eu-repo/grantAgreement/MEC//AP2007-01417/ES/AP2007-01417/
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Thanks:
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This work was supported in part by the PROMETEO/2009/013 and TEC2009-13741 projects, by the AP2007-01417 FPU grant, and by FWF grant S10606.
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Type:
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Artículo
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