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In this paper, convolutional encoders are studied for unequal error protection (UEP) from an algebraic theoretical viewpoint. Given any convolutional code, UEP-optimal encoders with the smallest McMillan degree are constructed to minimize the coding complexity. The noncatastrophic property of encoder is also maintained to avoid the undesired catastrophic propagation of decoding errors.
Quadratic permutation polynomial (QPP) interleaver has the advantage of contention-free for parallel memory access and has been adopted in the 3GPP LTE for turbo coding. Conventional implementations of the QPP interleaver based on the look-up table or on-line calculation usually result in large circuit area or higher clock rate for parallel turbo decoding. In this paper, an architecture design of...
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