It is very important to correct the synchronization errors that occur if the receiver is not completely synchronized with the transmitter. However, it is impossible to achieve perfect synchronization in many communication systems.
Synchronization errors due to the insertion and deletion of symbols can cause serious performance degradation if the coding scheme does not possess the capability to recover from such errors.
Pak Jang Son, a researcher at the Faculty of Communications, has proposed a method for correcting synchronization errors that occur in Turbo code sequence using the algebraic operation principle of Scarce-State-Transition (SST) Viterbi decoder.
The encoding/decoding procedures of Turbo code in this method are similar to the common case, except making corrupted bit positions caused by bit insertion/deletion in received Turbo code sequence take their original positions.
The simulation result shows that the proposed method is capable of correcting synchronization errors occurring in the received Turbo code sequences.