如何解读wireshark信号强度
我使用 Google 几个小时,但没有找到令人满意的答案,如何解释由 radiotap 标头给出的捕获信号强度。例如,Wireshark 显示了 -52 dBm 的 SSI 信号,我想将其转换为线性表示/单位。对我来说,一个合理的单位是天线的信号功率,单位为瓦特/毫瓦。是否可以将-52 dBm 转换为mW?
一些背景信息:我实现了基于 WLAN 的定位,并希望通过结合一些参考点和测量的信号强度来估计 AP 的位置。在三角测量的帮助下,这应该会生成一个粗略的环境地图。
I use Google for hours but I do not find a satisfying answer how to interpret the captured signal strength, given by the radiotap header. For instance Wireshark shows me a SSI Signal of -52 dBm and I want to convert it to a linear representation/unit. For me, a sensible unit would be the signal power at the antenna in Watt over mW. Is it possible to convert this -52 dBm to mW?
Some background information: I implement a WLAN-based localisation and want to estimate the position of APs by combining some reference points and the measured signal strength. With the help of triangulation, this should produce a rough map of the environment.
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正如 Wikipedia 页面 中所解释的那样,您可以通过应用以下方法将 x dBm 转换为 P 瓦特:
因此,在您的情况下,-52 dBm = 6.3 nW,这似乎是正确的。
As explained quite well on the Wikipedia page, you can convert from x dBm to P Watts by applying:
So in your case, -52 dBm = 6.3 nW, which seems about right.