Software-defined radio, sometimes shortened to software radio (SR), refers to wireless communication in which the transmitter modulation is generated or defined by a computer, and the receiver uses a computer to recover the signal intelligence. To select the desired modulation type, the proper programs must be run by microcomputers that control the transmitter and receiver.

The US Federal Communications Commission (FCC) has announced
its approval of the first software-defined radio (SDR) device allowed in the United States.

The most significant asset of SDR is versatility. For instance, wireless systems employ protocols that vary from one service to another - even in the same type of service - whereas a single SDR set with an all-inclusive software repertoire can be used in any mode, anywhere in the world. Software defined radios can change the frequency range, modulation type or output power of a radio device without making changes to hardware components. This programmable capacity permits radios to be highly adaptable to changing needs, protocols and environments.

If you want to learn more, see this white paper.

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