Viterbi decoder for error control of digital data transmission in digital cellular networks

摘要

The Viterbi decoder includes a branch metric processing unit (52) for calculating the amount of branching of signals from an input terminal. The ACS (add, compare, select) processor unit (53) receives state values from previous points in time as well as the branch metric values and computes path information. A state value storage device (56) stores values output from a normalisation unit. The decoder further includes a maximum branching value detection device (56), a maximum branching value storage device and a follow-up control device (58). A path storage device (59) stores the path information from the AVA processor unit.