# Software-Defined Radio ## Identification Software-defined radio implements signal-processing and radio functions substantially in software. ## Scanned_20260730-1235 evidence In [[Scanned_20260730-1235|Scanned_20260730-1235]], [[Scanned_20260730-1235#Scanned_20260730-1235.pdf — PDF page 30|page 30]], [[Scanned_20260730-1235#Scanned_20260730-1235.pdf — PDF page 40|page 40]], it belongs to the notebook's physical-radio layer alongside modems, serial links, GSM, SIP, Wi-Fi, and Bluetooth. ## Evidentiary status The notebook occurrence establishes research context, not installation, account ownership, product use, partnership, or administrative control. Further overlays should preserve this distinction.