Title :
Pilotless Frame Synchronization via LDPC Code Constraint Feedback
Author :
Lee, Dong-U ; Kim, Hyungjin ; Jones, Christopher R. ; Villasenor, John D.
Author_Institution :
Univ. of California, Los Angeles
fDate :
8/1/2007 12:00:00 AM
Abstract :
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.
Keywords :
decoding; parity check codes; receivers; synchronisation; LDPC code constraint feedback; XOR-based approach; bipartite decoding graph; low-density parity-check code; pilotless frame synchronization; receiver architectures; Bandwidth; Channel coding; Convergence; Costs; Equations; Feedback; Iterative decoding; Laboratories; Parity check codes; Propulsion;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2007.070525
