Sequential decoding device for decoding systematic code

Abstract From the Canadian patent

A sequential decoding device for decoding a data expressed by a systematic code having a symbol memory a, maximum likelihood path decision circuit and a path, memory, includes: an overflow detection circuit for detecting an overflow of the symbol memory and a switch, for supplying signal bit data as an decoded output, read from the symbol memory directly to the path memory in correspondence with an overflow detection signal from the overflow detection circuit. The device includes further a path metric value increase/decrease monitoring circuit for monitoring the increase/decrease of a path metric value delivered from the maximum likelihood path decision circuit and controlling the switch in …