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This letter addresses the effect of threshold offset on the average performance and UEP capability of higher order constellation (HOC) unequal error protection low density parity check (UEP-LDPC) codes. We optimize the variable node degree distribution for an HOC UEP-LDPC code at a minimum threshold, with a fixed check node degree distribution and code rate. The average performance and the UEP capability...
Interleaving is a key to Turbo coding's exceptional performance. An interleaver provides bit-permutation designed to ensure deterministic randomness. When applying interleavers to unequal error protecting (UEP) Turbo codes, typically, priority classes protected with different rates are kept separate. This work, however, gives insight, how the performance changes, when block boundaries are relaxed,...
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