Propagation of Errors in the Decoding of Uniform Convolutional Codes

The effect of error propagation for certain convolutional codes is investigated on the basis of the concept of the stability of the decoder. Among the PO-codes of J. Massey [Threshold Decoding, Cambridge, MIT Press, 1963] we select those in which the effect of decoding errors is extended to an arbitrary distance. For a class of uniform convolutional codes we find the length of the region in which decoding errors have an effect.