Evolutionary coded modulation: a coded-modulation extension of turbo codes designed with genetic algorithms

2002 ◽  
Author(s):  
W.E. Snelling
Keyword(s):  
Genetic Algorithms ◽  
Turbo Codes ◽  
Coded Modulation

Genetic Algorithms for Better Turbo Codes

2008 ◽  
Author(s):  
Václav Snášel ◽  
Jan Platoš ◽  
Pavel Krömer ◽  
Nabil Ouddane
Keyword(s):  
Genetic Algorithms ◽  
Turbo Codes

Coded modulation scheme employing turbo codes

1995 ◽  
Vol 31 (18) ◽  
pp. 1546-1547 ◽  
Author(s):  
P. Robertson ◽  
T. Wörz
Keyword(s):  
Turbo Codes ◽  
Coded Modulation ◽  
Modulation Scheme

scholarly journals Improving the performance of BICM-ID and MLC systems with different FEC codes

2013 ◽  
Vol 11 ◽  
pp. 87-93 ◽  
Author(s):  
T. Arafa ◽  
W. Sauer-Greff ◽  
R. Urbansky
Keyword(s):  
Turbo Codes ◽  
Channel Coding ◽  
Communication Systems ◽  
Forward Error Correction ◽  
Convolutional Codes ◽  
Coded Modulation ◽  
Modulation Formats ◽  
Coding Schemes ◽  
Multilevel Modulation ◽  
Exit Charts

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.

Sign in / Sign up

Export Citation Format

Share Document