I have many low-power electrical devices generating signals on small antenna that are located inside of a strong magnetic field. I want to extract those signals referencing the field itself, as I cannot touch or come close to the devices.
How might this be done?
If the frequency of the interfering sources is different from the frequency of the strong signal you can detect the weak signals by means of filters.
An other solution you can acquire the signal and correlate it with every source in this way if the sources are not correlated then you can separate them by this method. You can also make Fourier transform of the detected signal and distinguish the signals by their frequencies. The last method is similar to the filter method.
Best wishes
Could you be a bit more specific in your question? What are the frequencies and relative field strengths of the fields?
Dear Don
the answer, as described by Zekry, is definitly YES. But this is a theoritical answer. In practice you may see some limitations ranging from frequency domain analysis to the reciever’s sensitivity and its dynamic range.
A practical example is Deep Space Probs which are working on boundaries of our solar system. The earth-bound transeivers are enclosed by earth’s strong magnetic field but the communication with the probe us possible.
To answer the question of HOW, as asked by Marvin, some detailed information are required to choose the optimum choice
thank you
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