When we think of the term radio, “high-tech” isn’t the first word that comes to mind anymore. A lot of people will think of analog commercial radio (“FM/AM“), something that started up around the 1920s. In fact, many airports, public safety organizations, and businesses still use conventional analog radio to communicate. However, digital radio completely dominates cellular communication and is increasing in usage with public safety organizations.
Given how low-level analog radio electronics are, how do software engineers and computers fit into the picture? Software-defined radio (SDR) is a way of performing radio communications using software components in place of hardware components (e.g., mixers, modulators, filters, etc.).