![]() This may seem pretty straightforward, but it’s actually one of the most crucial steps. Once you have obtained the receiver, you will need an antenna and a place to put it. Those pre-process the signal for the digital components. For that reason, real SDR receivers use some hardware components, most commonly wide-band, low-noise amplifiers and band-pass filters. The main obstacle is the analog-to-digital converters turns out it is pretty hard to design a converter that can convert quickly and accurately enough, even signals at nanovolt level. Unfortunately, we don’t live in an ideal world. You could just hook up the antenna to the converter, feed the output to the signal processor, and voila you can process the data stream in a computer. ![]() In an ideal world, Software-Defined Radio (SDR) would require only three hardware components: antenna, analog-to-digital converter, and a digital signal processor.
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