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A low-complexity 2D signal space diversity solution for future broadcasting systems

Abstract : —DVB-T2 was the first industrial standard deploying rotated and cyclic Q delayed (RCQD)modulation to improve performance over fading channels. This enablesimportantgains compared toconventional quadrature amplitude modulations(QAM) under severe channel conditions.However, the corresponding demodulation complexitystill prevents its use forwider applications. This paper proposes several rotation angles for different QAM constellations anda corresponding low-complexity detection method. Results show that the proposed solution simplifies both the transmitter and the receiver with often betterperformancethan the proposed angles in DVB-T2. Compared with the lowest complexity demappers currently used in DVB-T2, the proposed solution achieves an additional reduction bymore than 60%. Index Terms— DVB-T2, Rotated and Cyclic Q Delayed (RCQD) Modulations, Signal Space Diversity (SSD), Fading Channel, Quadrature Amplitude Modulations (QAM), Max-Log, ComputationalComplexity.
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Submitted on : Wednesday, November 4, 2015 - 3:00:15 PM
Last modification on : Tuesday, October 19, 2021 - 11:14:16 AM
Long-term archiving on: : Friday, February 5, 2016 - 11:13:14 AM

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Jianxiao Yang, Wan Kai, Benoit Geller, Charbel Abdel Nour, Olivier Rioul, et al.. A low-complexity 2D signal space diversity solution for future broadcasting systems. IEEE International Conference on Communications (ICC 2015), Jun 2015, London, United Kingdom. pp.2762-2767, ⟨10.1109/ICC.2015.7248744⟩. ⟨hal-01224303⟩

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