Prototype of Data Link Based on Random Modulation Hopping and Automatic Modulation Recognition

A model of data link system based on modulation hopping and Automatic Modulation Recognition (AMR) is proposed, and the prototype of the pro-posed system is developed with GNU radio platform and the universal software radio peripheral (USRP). At the transmitting end of the prototype, the random sequence is generated to control modulation hopping pattern. At the receiver part, an AMR Network module recognizes the modulation mode and sends the information to the demodulation module to obtain the data flow. In the experiment, the speed of modulation recognition and the tracking ability of the modulation hopping under typical working environments are verified and analysed. The experimental results and the analysis of the corresponding parameters verify the rationality and availability of the system design.