Pilotless Frame Synchronization via LDPC Code Constraint Feedback
Dong-U Lee, Hyungjin Kim, Chris R. Jones, John D. Villasenor · IEEE Communications Letters · 2007
In traditional receiver architectures, frame synchronization is performed using pilot symbols and a correlation rule. In this paper we show that outputs from the constraint node side of a bipartite decoding graph can be used to achieve frame synchronization in a pilotless low-density parity-check (LDPC) coded transmission, thereby avoiding the bandwidth cost inherent in use of pilot symbols. The complexity of the frame synchronizer is kept relatively low due to its XOR-based approach.