Question
Which of these functions is performed by software in a software-defined radio (SDR)?
Answer Options
- A) Filtering
- B) Detection
- C) Modulation
- D) All these choices are correct
Correct Answer: D
Explanation
A Software-Defined Radio (SDR) is characterized by moving most of the traditional radio functions (which were once performed by analog components like mixers and filters) into the digital domain, where they are executed by a computer processor or specialized chip (FPGA).
Since these functions are implemented using algorithms and code, key operations like filtering (shaping the passband), detection (demodulation), and modulation (shaping the transmitted signal) are all performed by software. Therefore, all these choices are correct, as software replaces the dedicated hardware for the majority of the transceiver’s operational functions.
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