An OFDM-Based Pre-Coded Chaos Shift Keying Transceiver for reliable V2V Transmission
An OFDM-Based Pre-Coded Chaos Shift Keying Transceiver for reliable V2V Transmission
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DOI：
10.1109/tvt.2022.3158395
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发表时间：
2022-06
影响因子：
6.8
通讯作者：
Zuwei Chen;Lin Zhang;Jian Zhang-;Zhiqiang Wu;Danzeng Luobu
中科院分区：
文献类型：
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作者：
Zuwei Chen;Lin Zhang;Jian Zhang-;Zhiqiang Wu;Danzeng Luobu
在这种通信中，我们提出了一种新的正交频分复用基于预编码混沌键控（OFDM-PC-CSK）收发器可靠的车对车（V2 V）通信。与传统的OFDM辅助的差分混沌键控（OFDM-DCSK）系统不同，该系统不需要传递参考混沌信号，并且利用对角化原理进行信息传输，从而获得比差分解调更好的可靠性。在发送端，利用不同初始值的混沌序列构造混沌相位矢量，并将其与离散傅里叶变换（DFT）矩阵和特征值矩阵的共轭相位矩阵相结合构成预编码器。预编码后的用户数据通过混沌循环矩阵进行调制，在多个子载波上传输。在接收器处，进行反向操作。随后，我们推导了V2 V信道上的理论误码率（BER），频谱效率和计算复杂度。仿真结果验证了理论分析的正确性，并表明OFDM-PC-CSK系统在V2 V信道下具有更好的可靠性和安全性。
In this correspondence, we propose a novel orthogonal frequency division multiplexing based pre-coded chaos shift keying (OFDM-PC-CSK) transceiver for reliable vehicle-to-vehicle (V2V) communications. In this design, different from traditional OFDM-aided differential chaos shift keying (OFDM-DCSK) systems, we remove the delivery of reference chaotic signals and utilize the diagonalization principle for information transmissions to achieve better reliability than the differential demodulation in OFDM-DCSK. At the transmitter, we construct the chaotic phase vector with chaotic sequences having different initial values, which are then combined with the discrete Fourier transform (DFT) matrix and a conjugate phase matrix of an eigenvalue matrix to compose a precoder. After precoding, the user data are modulated by the chaotic circulant matrix and transmitted over multiple subcarriers. At the receiver, reverse operations are conducted. Subsequently, we derive the theoretical bit error rate (BER) over V2V channels, the spectrum efficiency and the computational complexity. Simulation results validate the theoretical analysis, and demonstrate that the OFDM-PC-CSK system outperforms the counterpart schemes with better reliability and security performances over V2V channels.