技术报告：OFDM辅助的量子与经典太赫兹同时通信
Technical Report OFDM-Assisted Simultaneous Quantum and Classical THz Communications
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中文总结 AI 辅助
本文提出基于OFDM的量子与经典太赫兹同时通信方案，在频率选择性信道中实现实用密钥率，优于单载波方案，后者需经典信号强于量子信号100倍。
中文摘要 AI 辅助
本文研究了在光频段和太赫兹（THz）频段中，通过叠加相干态同时传输量子密钥和经典信息的低成本同时量子与经典通信（SQCC）的可行性。由于现有的太赫兹SQCC方案假设在平坦衰落信道上进行单载波（SC）传输，我们着手研究在现实的频率选择性多径太赫兹衰落信道中的SQCC。随后，我们提出了一种基于正交频分复用（OFDM）的SQCC系统，用于时不变频率选择性太赫兹场景，并辅以低密度奇偶校验编码（LDPC）的多维QKD协调方案。仿真结果表明，基于OFDM的SQCC方案能够在经典信号与量子信号之间广泛的功率共享场景下实现实用的密钥率（SKR）。相比之下，其单载波对应方案在太赫兹SQCC中要求经典信号至少比量子信号强100倍。
英文摘要
The feasibility of cost-effective simultaneous quantum and classical communication (SQCC) transmitting both the quantum key and classical information via a superimposed coherent state is investigated both in optical and Terahertz (THz) bands. Since the existing THz SQCC schemes assume single-carrier (SC) transmission over flat fading channels, we embark on investigating SQCC in realistic frequency-selective multipath THz fading channels. We then propose an orthogonal frequency division multiplexing (OFDM) based SQCC system for time-invariant frequency-selective THz scenarios, supported by low-density parity-check coded (LDPC) multidimensional QKD reconciliation schemes. Our simulation results demonstrate that the OFDM-based SQCC scheme is capable of achieving a practical secret key rate (SKR) over a wide range of power sharing scenarios between the classical and quantum signals. By contrast its single-carrier counterpart requires the classical signal to be at least 100 times stronger than the quantum signal in THz SQCC.
发表机构
- University of Southampton（南安普顿大学）
- The University of Tokyo（东京大学）
机构由 AI 辅助整理，请以论文原文为准。
