Theoretical analysis of a MAP based blind frame synchronizer
IEEE Transactions on Wireless Communications
A code-aided soft frame synchronization algorithm for quasi-cyclic LDPC coded system
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Low-complexity list-based frame synchronization for LDPC coded transmission
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
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We present a pilotless frame synchronization approach that exploits feedback from a low-density parity-check (LDPC) code decoder. The synchronizer is based on syndrome checks using hard decisions from the channel observations. The bandwidth overhead associated with pilot symbols in conventional receiver architectures is eliminated while providing sufficient synchronization performance. An LDPC decoder coupled with our synchronizer exhibits negligible frame error rate degradation over a system with perfect synchronization. The complexity of the frame synchronizer is kept relatively low due to its XOR-based approach.