Title :
Simplified soft-output demapper for binary interleaved COFDM with application to HIPERLAN/2
Author :
Tosato, Filippo ; Bisaglia, Paola
Author_Institution :
Dipt. di Elettronica e Inf., Padova Univ., Italy
Abstract :
A comparison in the performance between hard- and soft-decision Viterbi decoding, with application to the HIPERLAN/2 standard, is presented. The results show that when channel state information (CSI) is included in the generation of the soft-decision information, the soft-decision method greatly outperforms the hard method. Moreover, a simplified algorithm for the soft-output demapper for the 16-QAM and 64-QAM constellations is developed, which allows the complexity of the demapper to be maintained at almost the same level for all the possible modes of HIPERLAN/2.
Keywords :
OFDM modulation; Viterbi decoding; binary codes; interleaved codes; maximum likelihood decoding; modulation coding; quadrature amplitude modulation; telecommunication standards; wireless LAN; 16-QAM constellation; 64-QAM constellation; ETSI BRAN; European standard; HIPERLAN/2 standard; binary interleaved COFDM; bit-interleaved coded modulation; channel state information; hard-decision Viterbi decoding; maximum likelihood decoding; performance; soft-decision Viterbi decoding; soft-decision information; soft-decision method; soft-output demapper algorithm; Binary phase shift keying; Convolution; Convolutional codes; Decoding; Modulation coding; OFDM modulation; Physical layer; Quadrature amplitude modulation; Quadrature phase shift keying; Viterbi algorithm;
Conference_Titel :
Communications, 2002. ICC 2002. IEEE International Conference on
Print_ISBN :
0-7803-7400-2
DOI :
10.1109/ICC.2002.996940
