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Simplified Soft-Output Demapper for Binary Interleaved COFDM with Application to HIPERLAN/2

Tosato, Filippo; Bisaglia, Paola


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Abstract: In this paper a comparison in 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. Notes: Filippo Tosato, Dipartimento di Elettronica e Informatica, University of Padova, Via Gradenigo 6/A, 35131 Padova, Italy

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