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SDR: Difference between revisions
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Software-defined radio moves the majority of radio processing into software, facilitating relatively inexpensive wide-band hardware interfaces to the electromagnetic spectrum, especially those frequencies below 3GHz. Pairing advanced SDRs with software-defined antennas yields dynamically optimal [https://en.wikipedia.org/wiki/Cognitive_radio cognitive radio]. Perhaps most famously, [https://www.rtl-sdr.com/about-rtl-sdr/ DVB-T television tuners] built around the RTL2832U chip, and available in USB form factor for less than $30 (particularly the Rafael Micro R820T2), can reliably provide 2MHz of RX bandwidth anywhere from ~30MHz to ~2GHz (still lower frequencies are supported via direct sampling). For $500, [[BladeRF|powerful units]] capable of tremendous bandwidth and range (as well as transmission capabilities) are available, and from there it's not that great a leap to building your own [https://en.wikipedia.org/wiki/Stingray_phone_tracker stingray]. | Software-defined radio moves the majority of radio processing into software, facilitating relatively inexpensive wide-band hardware interfaces to the electromagnetic spectrum, especially those frequencies below 3GHz. Pairing advanced SDRs with software-defined antennas yields dynamically optimal [https://en.wikipedia.org/wiki/Cognitive_radio cognitive radio]. Perhaps most famously, [https://www.rtl-sdr.com/about-rtl-sdr/ DVB-T television tuners] built around the RTL2832U chip, and available in USB form factor for less than $30 (particularly the Rafael Micro R820T2), can reliably provide 2MHz of RX bandwidth anywhere from ~30MHz to ~2GHz (still lower frequencies are supported via direct sampling). For $500, [[BladeRF|powerful units]] capable of tremendous bandwidth and range (as well as transmission capabilities) are available, and from there it's not that great a leap to building your own [https://en.wikipedia.org/wiki/Stingray_phone_tracker stingray]. | ||
==Hardware== | |||
==Software== | |||
Revision as of 04:38, 6 July 2019
Software-defined radio moves the majority of radio processing into software, facilitating relatively inexpensive wide-band hardware interfaces to the electromagnetic spectrum, especially those frequencies below 3GHz. Pairing advanced SDRs with software-defined antennas yields dynamically optimal cognitive radio. Perhaps most famously, DVB-T television tuners built around the RTL2832U chip, and available in USB form factor for less than $30 (particularly the Rafael Micro R820T2), can reliably provide 2MHz of RX bandwidth anywhere from ~30MHz to ~2GHz (still lower frequencies are supported via direct sampling). For $500, powerful units capable of tremendous bandwidth and range (as well as transmission capabilities) are available, and from there it's not that great a leap to building your own stingray.
