Efficient Probabilistic Parity Shaping for Irregular Repeat-Accumulate LDPC Codes
By: Diego Lentner, Thomas Wiegart, Richard D. Wesel
Potential Business Impact:
Improves wireless signals for clearer communication.
Algorithms are presented that efficiently shape the parity bits of systematic irregular repeat-accumulate (IRA) low-density parity-check (LDPC) codes by following the sequential encoding order of the accumulator. Simulations over additive white Gaussian noise (AWGN) channels with on-off keying show a gain of up to 0.9 dB over uniform signaling.
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