| 面向WSN的QAM系统功放性能分析 |
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| 作者姓名： | 朱百明 燕丽艳 尹洪胜 齐洪钢 |
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| 作者单位： | 1. 江苏联合职业技术学院徐州财经分院, 江苏 徐州;2. 江苏师范大学, 江苏 徐州 221116;3. 中国矿业大学信息与控制工程学院, 江苏 徐州 221116;4. 中国科学院大学, 北京 100049 |
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| 基金项目： | 国家自然科学基金（61841114，61901475）资助 |
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| 摘 要： | 采用单载波正交幅值调制（Quadrature Amplitude Modulation，QAM）的无线传感网络（Wireless Sensor Network，WSN）系统性能的分析研究中，一般都忽略功率放大器的非线性特性，实际上功放的非线性特性对系统性能的影响不可忽略。在功放经过非线性失真补偿后近似理想A类功率放大器特性的假设基础上，分析滤波器滚降系数、功放功率回退量对系统星座图、功率谱密度（Power Spectral Density，PSD），、误符号率（Symbol Error Rate，SER）3个性能参数的影响。仿真结果验证了理论分析的正确性。
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| 关 键 词： | QAM 理想功放 功率回退 WSN |
| 收稿时间： | 2019-08-09 |
| 修稿时间： | 2019-10-20 |
Analysis for QAM performance on WSN |
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| Authors: | ZHU Baiming YAN Liyan YIN Hongsheng QI Honggang |
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| Institution: | 1. Xuzhou Vocational Technology Academy of Finance and Economics, Jiangsu Union Technical Institute, Xuzhou;2. Jiangsu Normal University, Xuzhou 221116, Jiangsu, China;3. School of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China;4. University of Chinese Academy of Science, Beijing 100049, China |
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| Abstract: | The nonlinear characteristics of power amplifiers are always ignored in the research of wireless sensor network system in which the single carrier quadrature amplitude modulation is adopted. In fact, the effect of the nonlinear characteristics of power amplifiers on the system is also very important. In this paper, we assume the characteristics of the power amplifier, which is processed with nonlinear distortion compensation, as the approximate ideal class A of power amplifier. The different effects of the power amplifier are analyzed from the roll-off coefficient of the filter and the power regression of the power amplifier aspects on the three parameters of constellation, power spectral density, and symbol error rate. The simulation results verify our theoretical analysis. |
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| Keywords: | QAM ideal power amplifier power back-off WSN |
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