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arXiv 1102.3939cs.ITmath.ITstat.AP
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TV频段白空间多路无线麦克风信号检测的子空间方法

A Sub-Space Method to Detect Multiple Wireless Microphone Signals in TV Band White Space

Harpreet S. Dhillon, Jeong-O Jeong, Dinesh Datla, Michael Benonis, R. Michael Buehrer, Jeffrey H. Reed

摘要:

从物理层的角度来看,实现动态频谱接入(DSA)系统的主要障碍是低功率许可用户的可靠感知。一种这样的场景出现在TV频带的未授权使用中,其中TV频带设备(TVBD)需要感测极低功率无线麦克风(WM)。各无线制造商之间缺乏技术标准,以及某些WM信号与窄带干扰信号(例如杂散发射)的相似性,进一步加剧了该问题。由于这些不确定性,这是非常困难的提取WM信号的特征,从而开发鲁棒的传感算法。为了部分应对这些挑战,我们开发了一个两阶段的子空间算法,检测多个窄带模拟调频信号产生的WM。该算法的性能进行了验证,通过使用实验捕获的低功率WM信号的接收功率范围从-100到-105 dBm。如何区分WM信号和其他窄带信号的问题有待于进一步研究。

英文摘要:

The main hurdle in the realization of dynamic spectrum access (DSA) systems from physical layer perspective is the reliable sensing of low power licensed users. One such scenario shows up in the unlicensed use of TV bands where the TV Band Devices (TVBDs) are required to sense extremely low power wireless microphones (WMs). The lack of technical standard among various wireless manufacturers and the resemblance of certain WM signals to narrow-band interference signals, such as spurious emissions, further aggravate the problem. Due to these uncertainties, it is extremely difficult to abstract the features of WM signals and hence develop robust sensing algorithms. To partly counter these challenges, we develop a two-stage sub-space algorithm that detects multiple narrow-band analog frequency-modulated signals generated by WMs. The performance of the algorithm is verified by using experimentally captured low power WM signals with received power ranging from -100 to -105 dBm. The problem of differentiating between the WM and other narrow-band signals is left as a future work.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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