| 物理层网络编码系统中不同转发模式的性能研究 |
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| 引用本文： | 孔媛媛,杨震,吕斌,田峰. 物理层网络编码系统中不同转发模式的性能研究[J]. 信号处理, 2018, 34(10): 1169-1177. DOI: 10.16798/j.issn.1003-0530.2018.10.004 |
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| 作者姓名： | 孔媛媛 杨震 吕斌 田峰 |
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| 作者单位： | 南京邮电大学宽带无线通信与传感网技术教育部重点实验室 |
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| 基金项目： | 国家自然科学基金项目(61671252, 61772287)；江苏省高校自然科学研究重大项目(14KJA510003)；江苏省研究生科研与实践创新计划项目(CXZZ11_0394)
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| 摘 要： | 在物理层网络编码系统中，中继节点的转发模式对系统性能有很大的影响，论文研究了放大转发、去噪转发和去噪再编码转发三种转发模式在物理层网络编码系统中的应用。首先给出了正交相移键控(QPSK)时三种转发模式的信号星座图，分析了编码方法的星座图对应关系。其次根据QPSK和正交振幅调制(QAM)的误码率公式，结合联合概率计算推导出了加性高斯白噪声信道环境下系统的误码率公式。最后进行了仿真验证，证明了误码率公式推导的正确性，对三种转发模式的抗噪声性能进行了分析和比较。
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| 关 键 词： | 物理层网络编码 双向中继系统 放大转发 去噪转发 去噪再编码转发 |
| 收稿时间： | 2018-05-08 |
Study on the Performance of Different Forward Modes in Physical Layer Network Coding Systems |
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| Affiliation: | Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications |
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| Abstract: | In physical layer network coding systems, the system performance is affected by forwarding modes used in the relay node. In this paper, we study three different modes in physical layer systems, e.g., amplify and forward, denoise and forward, denoise encode and forward. We first study the constellation diagrams for encoded signals of the three modes where quadrature phase shift keying (QPSK) scheme is used. Then, the s of signal error rate (SER) are derived in the additive white Gaussian noise channel based on the existing s of SER for QPSK and Quadrature Amplitude Modulation (QAM). Simulation results are given to verify the correctness of the derived s and compare the performance of the studied three modes. |
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