| 摘要: |
| 为了降低研发成本，提高频谱系统的灵活性和缩短研制周期，提出了一种基于软件无线电的嵌入式频谱监测系统。首先研究了系统硬件平台组成和特点，在此基础上设计了一种灵活的软件定义系统架构；然后考虑到硬件平台自身性能的限制，重点研究了频率偏移校正、频谱扫描策略等关键技术，分别提出了基于GSM信号和温度传感器的频偏校正方法和基于相关性的扫频策略；最后通过具体实验，对系统性能进行验证与评估，结果表明所提出的频偏校正方法能够将绝对平均频偏控制在1.749×10-6以内，所设计的基于相关性的扫频策略对时变信号的频谱监测效果最好。 |
| 关键词: 频谱监测 软件无线电 频偏校正 扫频策略 |
| DOI： |
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| 基金项目: |
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| An Embedded Spectrum Monitoring System Based on Software Defined Radio |
| LI Kui,ZHANG Ting,GAO Yang,WANG Chengbin |
| (1.State Key Laboratory of Geo-information Engineering,Xi′an 710054,China;
2.Xi′an Research Institute of Surveying and Mapping,Xi′an 710054,China) |
| Abstract: |
| In order to reduce the cost of research and development,improve the flexibility of spectrum system and shorten the development cycle,an embedded spectrum monitoring system based on software defined radio（SDR） is proposed.Firstly,the composition and characteristics of the system hardware platform are studied.Then,in consideration of the limitation of the hardware platform's performance,the key technologies such as frequency offset correction and spectrum sweeping strategy are mainly studied,and the frequency offset correction method based on GSM signal and temperature sensor and frequency sweeping strategy based on correlation are proposed respectively.Finally,the performance of the system is verified and evaluated by experiments.The results show that the frequency offset correction method proposed can control the absolute average frequency offset within 1.749×10-6,and the frequency sweeping strategy based on correlation has the best spectrum monitoring effect on time-varying signals. |
| Key words: spectrum monitoring software defined radio frequency offset correction spectrum sweeping strategy |
