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A new method for the integration of modulation and channel coding in an ARQ protocol

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1 Author(s)
Benelli, G. ; Dipartimento di Ingegneria Elettronica, Pavia Univ., Italy

A method for the integration of the modulation operation in an automatic-repeat-request (ARQ) scheme is described. This method uses a memory for the successive transmissions of a codeword and, through a suitable encoding operation, the Euclidean distances among the codewords are significantly increased with the number of transmissions. The application of the described method to some different modulation schemes, such as M-ary PSK with M>2 and continuous-phase frequency shift keying modulation, is described. The optimum combination of the modulation and channel coding operations for some short block codes is also presented. The results of the theoretical analysis show that the method described permits improving both the error probability and the throughput of an ARQ protocol with respect to similar schemes

Published in:

Communications, IEEE Transactions on  (Volume:40 ,  Issue: 10 )

Date of Publication:

Oct 1992

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