EXIT-Chart Aided Design of Irregular Multiple-Rate Quantum Turbo Block Codes

EXIT-Chart Aided Design of Irregular Multiple-Rate Quantum Turbo Block Codes

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We propose a novel quantum turbo short-block code, which subsumes multiple-rate quantum short-block codes (MR-QSBCs) as the outer codes and a quantum unity-rate code (QURC) as the inner code.The proposed design is denoted as MR-QSBC-QURC.More specifically, the proposed design exhibits multiple quantum coding rates despite relying only on a single quantum encoder.Moreover, here the flexibility offered by the single-encoder MR-QSBCs enables us to leverage extrinsic information transfer (EXIT)-chart based heuristic optimization for determining the optimal weighting in the fractional encoding of MR-QSBCs.Our simulation results show that the MR-QSBC-QURC scheme conceived performs relatively close to the ultimate limit of the quantum hashing bound.

Specifically, when considering the target quantum tokidoki hello kitty blind box coding rates of $r_{Q} = lbrace 0.3, 0.4, 0.5, 0.6, 0.

7 brace $ , the MR-QSBC-QURC operates at a distance of $D = lbrace 0.042, 0.029, 0.030, 0.024, 0.

017 brace $ from the quantum hashing bound, respectively, at a quantum bit error ratio (QBER) of 10−3.