To select the desired modulation type, the proper programs must be run by microcomputers that control the transmitter and receiver. A typical voice SDR transmitter, such as might be used in mobile two-way radio or cellular telephone communication, consists of the following stages. A typical receiver designed to intercept the above-described voice SDR signal would employ the following stages, essentially reversing the transmitter's action. Again, items followed by asterisks represent programmable circuits. The most significant asset of SDR is versatility.
Wireless systems employ protocols that vary from one service to another.
Even in the same type of service, for example wireless fax, the protocol often differs from country to country. A single SDR set with an all-inclusive software repertoire can be used in any mode, anywhere in the world. Joseph Mitola III has assembled a course on SDR and cognitive radio. Bringing you the best technology specific search engines.