RTL-SDR is the name given to USB dongles that can be used to receive I/Q samples. They use a chipset that was originally meant to be used to watch Digital TV on computers, but with the help of a debug mode in the chip, raw samples can be received from a wide frequency range.
@article{yaltirakliwikirtlsdr, title = "RTL-SDR", author = "Yaltirakli, Gokberk", journal = "gkbrk.com", year = "2023", url = "https://www.gkbrk.com/wiki/rtl-sdr/" }
Gokberk Yaltirakli, "RTL-SDR", May, 2023. [Online]. Available: https://www.gkbrk.com/wiki/rtl-sdr/. [Accessed May. 30, 2023].
Yaltirakli, G. (2023, May 30). RTL-SDR. https://www.gkbrk.com/wiki/rtl-sdr/
Gokberk Yaltirakli, RTL-SDR, GKBRK.COM (May. 30, 2023), https://www.gkbrk.com/wiki/rtl-sdr/