Spectrum Monitoring and Source Separation in POWDER
Spectrum Monitoring and Source Separation in POWDER
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DOI：
10.1145/3411276.3412192
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发表时间：
2020-09
期刊：
影响因子：
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通讯作者：
Boston C Terry;Alex Orange;Neal Patwari;S. Kasera;J. Merwe
中科院分区：
文献类型：
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作者：
Boston C Terry;Alex Orange;Neal Patwari;S. Kasera;J. Merwe
目前的软件定义无线电系统能够以几乎任意的频率进行传输，这可能会在空中广播时对现有的通信服务造成有害干扰。开放无线数据驱动实验研究平台（POWDER）提供软件无线电，其输出可以被放大并通过空中传输。POWDER必须包括频谱监控系统，该系统可以识别在允许的频带之外进行传输的用户，以确保无线频谱许可证持有人不会受到有害干扰。发射信号路径中的功率放大器可在中心频率谐波处产生发射及其它杂散发射。频谱监测系统与发射链中所有放大器之后的信号路径相结合，可以检测到这些发射。然而，入射射频能量与输出信号结合，不再由放大器缓冲。事件和传输信号必须分开和隔离。然后，监视器可以分析隔离的传输信号的带外能量。本文提出了一种系统，可以实现隔离和识别用户的广播带外。
Current software-defined radio systems enable transmission at nearly arbitrary frequencies, presenting the possibility of harmful interference to existing communication services when broadcasting over-the-air. The Platform for Open Wireless Data-driven Experimental Research (POWDER) provides software radios whose output can be amplified and transmitted over-the-air. POWDER must include a spectrum monitoring system that can identify users who are transmitting outside allowed frequency bands to ensure wireless spectrum license holders do not experience harmful interference. Power amplifiers in the transmit signal path can create emissions at center frequency harmonics and other spurious emissions. A spectrum monitoring system, coupled with signal paths after all amplifiers in the transmit chain, can detect these emissions. However, incident radio frequency energy combines with the output signal, which is no longer buffered by the amplifier. Incident and transmitted signals must be separated and isolated. The monitor can then analyze the isolated transmitted signal for out-of-band energy. This paper presents a system that can achieve isolation and identify users that broadcast out-of-band.