Title :
Performance of block turbo coded 16-QAM and 64-QAM modulations
Author :
Pyndiah, Ramesh ; Picart, Annie ; Glavieux, Alain
Author_Institution :
Telecom Bretagne, Brest, France
Abstract :
We present the results of our investigation concerning the performance of block turbo codes associated with high spectral efficiency QAM modulations. By using a pragmatic approach, simulation results show that all the block turbo coded QAM modulations we have tested are at 2.9±0.2 dB of their Shannon´s limit. The block turbo coded QAM modulations also outperform TCM schemes by at least 1 dB at a BER (bit error rate) of 10-5. Concerning convolutional turbo coded QAM modulations, the block turbo coded QAM modulations exhibit slightly better performance for spectral efficiencies greater than 4 bits/s/Hz
Keywords :
block codes; coding errors; concatenated codes; convolutional codes; error statistics; modulation coding; quadrature amplitude modulation; BER; Shannon´s limit; bit error rate; block turbo coded 16-QAM; block turbo coded 64-QAM; block turbo codes; convolutional turbo coded QAM; high spectral efficiency QAM; performance; simulation results; spectral efficiencies; Bit error rate; Convolutional codes; Digital modulation; Iterative algorithms; Iterative decoding; Maximum likelihood decoding; Modulation coding; Product codes; Quadrature amplitude modulation; Turbo codes;
Conference_Titel :
Global Telecommunications Conference, 1995. GLOBECOM '95., IEEE
Print_ISBN :
0-7803-2509-5
DOI :
10.1109/GLOCOM.1995.502563
