SINCRONIZAÇÃO DE PORTADORA EM SISTEMAS COM MODULAÇÃO CODIFICADA EM TRELIÇA / CARRIER DISCOVERY FOR DETECTION OF TRELLIS-CODED MODULATED SIGNAL

AUTOR(ES)
DATA DE PUBLICAÇÃO

1993

RESUMO

This thesis analyses some coherent decoding schemes for TCM signals reception. In addition, a new scheme, which makes use of a per survivor processing, is propoed. In this scheme, each trellis state has an associated phase estimate which is generated by a data-aided PLL-like algorithm, based on the survivor sequence associated to that state. Some useful expressions are developed to help the parameters selection for use on the estimation algorthm. These expressions are based on a simplified linear analysis which are carried out on both transient and stationary cases. We compare the proposed scheme performance to others schemes by means of computer simulation. These results show that the new scheme has better performance in terms of bit-error-rate.

ASSUNTO(S)

decodificacao algoritmos algorithms decoding

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