Multi-Level Encrypted Transmission Scheme Using Hybrid Chaos and Linear Modulation
Multi-Level Encrypted Transmission Scheme Using Hybrid Chaos and Linear Modulation
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DOI：
10.1587/transcom.2021ebp3092
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发表时间：
2022
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通讯作者：
Kaga Tomoki;Mamoru Okumura;E. Okamoto;Tetsuya Yamamoto
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文献类型：
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作者：
Kaga Tomoki;Mamoru Okumura;E. Okamoto;Tetsuya Yamamoto
在第五代移动通信系统(5G)中，确保无线安全以及大容量和高速通信是至关重要的。为此，提出了一种混沌调制方法，作为物理层的加密和信道编码调制方法。然而，在传统的混沌调制方法中，解码复杂度相对于调制阶数呈指数增加。为了解决这一问题，本研究提出了一种采用正交幅度调制(QAM)和混沌相结合的混合调制方法，将部分传输比特分配给QAM，同时保持对所有比特的加密，从而降低了译码复杂度。在该方法中，基于索引调制理论，通过对混沌和QAM符号进行排序，构造了一种低复杂度的译码方法。数值结果表明，该方法在保持良好误码率性能的同时，降低了译码复杂度，保证了无线通信的安全性。
SUMMARY In the fifth-generation mobile communications system (5G), it is critical to ensure wireless security as well as large-capacity and high-speed communication. To achieve this, a chaos modulation method as an encrypted and channel-coded modulation method in the physical layer is proposed. However, in the conventional chaos modulation method, the decoding complexity increases exponentially with respect to the modulation order. To solve this problem, in this study, a hybrid modulation method that applies quadrature amplitude modulation (QAM) and chaos to reduce the amount of decoding complexity, in which some transmission bits are allocated to QAM while maintaining the encryption for all bits is proposed. In the proposed method, a low-complexity decoding method is constructed by ordering chaos and QAM symbols based on the theory of index modulation. Numerical results show that the proposed method maintains good error-rate performance with reduced decoding complexity and ensures wireless security.