面向WSN的QAM系统功放性能分析

doi:10.7523/j.issn.2095-6134.2021.03.016

中国科学院大学学报 ›› 2021, Vol. 38 ›› Issue (3): 417-422.DOI: 10.7523/j.issn.2095-6134.2021.03.016

面向WSN的QAM系统功放性能分析

朱百明¹, 燕丽艳², 尹洪胜³, 齐洪钢⁴

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

收稿日期:2019-08-09 修回日期:2019-10-20 发布日期:2021-05-17
通讯作者: 齐洪钢
基金资助:
国家自然科学基金（61841114，61901475）资助

Analysis for QAM performance on WSN

ZHU Baiming¹, YAN Liyan², YIN Hongsheng³, QI Honggang⁴

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

Received:2019-08-09 Revised:2019-10-20 Published:2021-05-17

摘要/Abstract

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。

关键词: QAM, 理想功放, 功率回退, WSN

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.

Key words: QAM, ideal power amplifier, power back-off, WSN

中图分类号:

TN722.75

朱百明, 燕丽艳, 尹洪胜, 齐洪钢. 面向WSN的QAM系统功放性能分析[J]. 中国科学院大学学报, 2021, 38(3): 417-422.

ZHU Baiming, YAN Liyan, YIN Hongsheng, QI Honggang. Analysis for QAM performance on WSN[J]. Journal of University of Chinese Academy of Sciences, 2021, 38(3): 417-422.

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面向WSN的QAM系统功放性能分析

Analysis for QAM performance on WSN

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