Iterative cyclic prefix reconstruction for coded single-carrier systems with frequency-domain equalization (SC-FDE)

In this paper, we propose iterative methods to reconstruct the cycle prefix for coded single-carrier frequency-domain equalization (SC-FDE) systems that employ insufficient length of cycle prefix at the transmitter. Since the insertion of the cyclic prefix for SC-FDE systems decreases the bandwidth utilization efficiency as the channel´s delay span increase, it is desirable to improve the bandwidth utilization efficiency by limiting the length of the cycle prefix. Two novel schemes for reconstructing the cycle prefix of coded SC-FDE systems are discussed: one employing the soft output of the soft output of the decoder and the other employing precoding. The performance of these schemes is shown by computer simulations.