Research on Multi-mode Scheme of Frequency Modulation System Based on Software Defined Radio

With the development of the times, science and technology progress, the traditional practice platform has been unable to meet the needs of users. This paper puts forward the design idea of innovative practice platform based on software radio. Taking the application of FM(Frequency Modulation) system as an example, four modes of FM modulation and demodulation system based on software defined radio platform, FM modulation and demodulation system built by software simulation, FM radio with soft and hard combination, FM transmitter and receiver with virtual and real combination are analyzed, and the scheme design and parameter setting of each mode under the same hardware equipment are discussed in detail. The platform is flexible, simple and reliable, and the practical results under the combination of virtual and real mode are described, and the collaboration between software and hardware is demonstrated.