scholarly journals Dispersion Tolerance of 40 Gbaud Multilevel Modulation Formats with up to 3 bits per Symbol

Author(s):  
Jesper Bevensee Jensen ◽  
Torger Tokle ◽  
Yan Geng ◽  
Palle Jeppesen ◽  
Murat Serbay ◽  
...  
2009 ◽  
Author(s):  
Hadrien Louchet ◽  
Konstantin Kuzmin ◽  
Igor Koltchanov ◽  
André Richter

2016 ◽  
Vol 31 ◽  
pp. 168-171 ◽  
Author(s):  
Peter Madsen ◽  
Lau Frejstrup Suhr ◽  
Juan Sebastian Rodriguez ◽  
Idelfonso Tafur Monroy ◽  
Juan José Vegas Olmos

Author(s):  
Torger Tokle ◽  
Murat Serbay ◽  
Jesper Bevensee Jensen ◽  
Werner Rosenkranz ◽  
Palle Jeppesen

2013 ◽  
Vol 21 (23) ◽  
pp. 28914 ◽  
Author(s):  
Mario Bolea ◽  
José Mora ◽  
Beatriz Ortega ◽  
José Capmany

2013 ◽  
Vol 11 ◽  
pp. 87-93 ◽  
Author(s):  
T. Arafa ◽  
W. Sauer-Greff ◽  
R. Urbansky

Abstract. In bandwidth limited communication systems, the high data rate transmission with performance close to capacity limits is achieved by applying multilevel modulation schemes in association with powerful forward error correction (FEC) coding, i.e. coded modulation systems. The most important practical approaches to coded modulation systems are multilevel coding with multistage decoding (MLC/MSD) and bit interleaved coded modulation with iterative demapping and decoding (BICM-ID). Multilevel modulation formats such as M-QAM, which can be used as a part of coded modulation systems, have the capability of multilevel protection. Based on this fact, we investigate the methods to improve the performance of BICM-ID using multiple interleavers with different binary channel coding schemes such as convolutional codes, turbo codes and low-density parity-check (LDPC) codes. Moreover, an MLC system with parallel decoding on levels (PDL) at the receiver is considered. In our contribution, we propose to design the individual coding schemes using the extrinsic information transfer (EXIT) charts for individual bit levels in the constellation. Our simulation results show that the BICM-ID systems, taking into account different bit-level protections, can provide an improvement of 0.65 dB, 1.2 dB and 1.5 dB for 256-QAM with turbo, LDPC and convolutional codes, respectively. On the other hand, MLC systems with PDL designed using EXIT charts for individual bit levels can slightly improve the performance and eliminate the error floor compared to the systems with MSD.


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