Simplified Non-Square Quadrature Amplitude Modulation Demapper for DOCSIS 3.1

被引：4

作者：

Lee, Jewon ^{[1
]}

Jung, Joon-Young ^{[1
]}

Ahn, Jae Min ^{[2
]}

机构：

[1] Elect & Telecommun Res Inst, Broadcasting Syst Res Dept, Daejeon 34129, South Korea

[2] Chungnam Natl Univ, Dept Radio & Informat Commun Engn, Daejeon 34134, South Korea

来源：

IEEE TRANSACTIONS ON BROADCASTING | 2017年 / 63卷 / 01期

关键词：

Log likelihood ratio (LLR); max-log maximum a posteriori (MAP); non-square quadrature amplitude modulation (QAM); ROTATED CONSTELLATION DEMAPPER; INTERLEAVED CODED MODULATION; 2ND-GENERATION; COMPLEXITY; DVB-T2; DEMODULATION; PERFORMANCE; GENERATION; DIVERSITY;

D O I：

10.1109/TBC.2016.2619583

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A simplified soft demapper for non-square quadrature amplitude modulation (QAM) provided by fifth generation of highspeed data-over-cable systems (DOCSIS 3.1) is proposed. By using the geometric tendency of the non-square QAM constellation and "fold-and-overlap" approach, the non-linear log likelihood ratio (LLR) equation based on the max-log maximum a posteriori (MAP) algorithm can be approximated to linear equations. With this approximation, the proposed method can be applied to high-order non-square QAM, up to 8192 QAM, with negligible bit error rate performance degradation under additive white Gaussian noise and multipath flat-fading channels. Computational complexity is reduced by at least 93% compared to the LLR calculation based on the max-log MAP algorithm.

引用

页码：156 / 161

页数：6

共 33 条

[1] Abdel Nour Charbel, 2008, 2008 IEEE 10th International Symposium on Spread Spectrum Techniques and Applications (ISSSTA), P354, DOI 10.1109/ISSSTA.2008.71
[2] [Anonymous], 2016, CMSPPHYV31I09160602
[3] Finite-Precision Analysis of Demappers and Decoders for LDPC-Coded M-QAM Systems
Baldi, Marco
Chiaraluce, Franco
Cancellieri, Giovanni
[J]. IEEE TRANSACTIONS ON BROADCASTING, 2009, 55 (02) : 239 - 250
[4] Digital Video Broadcasting (DVB), 2012, 302769 ETSI EN
[5] Douillard Catherine, 2013, NEXT GENERATION MOBI
[6] DVB-T2: The Second Generation of Terrestrial Digital Video Broadcasting System
Eizmendi, Inaki
Velez, Manuel
Gomez-Barquero, David
Morgade, Javier
Baena-Lecuyer, Vicente
Slimani, Mariem
Zoellner, Jan
[J]. IEEE TRANSACTIONS ON BROADCASTING, 2014, 60 (02) : 258 - 271
[7] An Overview of the ATSC 3.0 Physical Layer Specification
Fay, Luke
Michael, Lachlan
Gomez-Barquero, David
Ammar, Nejib
Caldwell, M. Winston
[J]. IEEE TRANSACTIONS ON BROADCASTING, 2016, 62 (01) : 159 - 171
[8] Low-Complexity Demapping Algorithm for Two-Dimensional Non-Uniform Constellations
Fuentes, Manuel
Vargas, David
Gomez-Barquero, David
[J]. IEEE TRANSACTIONS ON BROADCASTING, 2016, 62 (02) : 375 - 383
[9] Gallager R. G., 1963, RES MONOGRAPH SERIES
[10] DVB-NGH: The Next Generation of Digital Broadcast Services to Handheld Devices
Gomez-Barquero, David
Douillard, Catherine
Moss, Peter
Mignone, Vittoria
[J]. IEEE TRANSACTIONS ON BROADCASTING, 2014, 60 (02) : 246 - 257

← 1 2 3 4 →