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Fig. 3 | EURASIP Journal on Wireless Communications and Networking

Fig. 3

From: A new portable ELF Schumann resonance receiver: design and detailed analysis of the antenna and the analog front-end

Fig. 3

Filtering and amplification chain. The architecture of our Schumann resonance detection and measuring system is shown in the schematic diagram. Two amplifying stages (preamplifier) and four active filtering stages are the signal conditioning setup that provide signal strength enhancement and bandwidth limitation in order to achieve Schumann resonance detection and measuring. The output of the last amplifying and filtering stage is connected to data acquisition system (DAQ). That system exploits digital signal techniques and methods, providing signal spectrum estimation and measuring

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