Resolvable 2-designs for regular low-density parity-check codes

  title={Resolvable 2-designs for regular low-density parity-check codes},
  author={Sarah J. Johnson and Steven R. Weller},
  journal={IEEE Trans. Communications},
This paper extends the class of low-density paritycheck (LDPC) codes that can be algebraically constructed. We present regular LDPC codes based on resolvable Steiner 2-designs which have Tanner graphs free of four-cycles. The resulting codes are -regular or -regular for any value of and for a flexible choice of code lengths. 
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