Comments on "A New Random-Error-Correction Code"

This correspondence investigates the error propagation properties of six different systems using a (12, 6) systematic double-error-correcting convolutional encoder and a one-step majority-logic feedback decoder. For the generally accepted assumption that channel errors are much more likely to occur than hardware errors in the decoder, it is shown that the system proposed by Massey outperforms the system proposed by En in the above note.
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Further, a third system is found which, even iftemporary hardware errors in the decoder are taken into account, is superior to the system proposed by En.