EXIT-Chart-Aided Near-Capacity Quantum Turbo Code Design
EXIT-Chart-Aided Near-Capacity Quantum Turbo Code Design
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DOI：
10.1109/tvt.2014.2328638
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发表时间：
2015-03-01
影响因子：
6.8
通讯作者：
Hanzo, Lajos
中科院分区：
文献类型：
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作者：
Babar, Zunaira;Ng, Soon Xin;Hanzo, Lajos
高检测复杂度是未来千兆无线系统的主要障碍。然而，基于量子的检测器凭借其固有的并行性质能够同时检测数百个用户信号。这又需要近容量量子纠错码来保护量子检测器的组成量子比特免受不期望的环境退相干的影响。在这一探索中，我们适当地适应传统的非二进制外部信息传输（EXIT）图表的量子Turbo码（QTC），利用内在的量子经典同构。EXIT图分析不仅使我们能够免除耗时的Monte Carlo模拟，但有利于近容量代码的设计，而不诉诸于他们的距离谱的分析。我们已经证明，我们的EXIT图预测是符合蒙特卡洛模拟结果。我们还使用EXIT图优化了纠缠辅助的QTC，其性能优于现有的基于距离谱的QTC。更明确地说，我们优化的QTC的性能接近0.3 dB到相应的哈希边界。
High detection complexity is the main impediment in future gigabit-wireless systems. However, a quantum-based detector is capable of simultaneously detecting hundreds of user signals by virtue of its inherent parallel nature. This, in turn, requires near-capacity quantum error correction codes for protecting the constituent qubits of the quantum detector against undesirable environmental decoherence. In this quest, we appropriately adapt the conventional nonbinary EXtrinsic Information Transfer (EXIT) charts for quantum turbo codes (QTCs) by exploiting the intrinsic quantum-to-classical isomorphism. The EXIT chart analysis not only allows us to dispense with the time-consuming Monte Carlo simulations but facilitates the design of near-capacity codes without resorting to the analysis of their distance spectra as well. We have demonstrated that our EXIT chart predictions are in line with the Monte Carlo simulation results. We have also optimized the entanglement-assisted QTC using EXIT charts, which outperforms the existing distance-spectra-based QTCs. More explicitly, the performance of our optimized QTC is as close as 0.3 dB to the corresponding hashing bound.