Cycle-slip-detector-aided iterative timing recovery

The latest developments in low-density parity-check codes have shown performances very close to the channel capacity. However, in order to use these capacity-approaching codes in the magnetic recording channel, the cycle-slip problem in the synchronizer has to be solved. In this paper, we develop a cycle-slip detector (CSD) for the binary intersymbol interference channel that uses the channel soft-output information as its input. This CSD is then used in an iterative timing recovery scheme to eliminate cycle slips. Our simulation results show that utilizing the CSD improves the convergence speed of iterative timing recovery.