SDDRM: Software Defined Digital Radio Mondiale

The analog transmission using AM (Amplitude Modulation) and FM (Frequency Modulation) techniques is still commonly used due to its simplicity, inexpensiveness, and reliability than the state of the art digital counterparts. The problems with AM/FM modulation are it consumes more bandwidth, quality of transmission is not good and transmission is not secure. Therefore a digital transmission system is required that uses existing protocols and gives advanced features. In this project, the UCERD Pvt Ltd Islamabad has presented a Software Defined Digital Radio Mondiale (SDDRM) broadcasting system that transfers the information securely over a wide geographical area. The system uses configurable Radio Frequency (RF) front-end, High-Performance Computing (HPC) system and simple to utilize programming environment. The SDDRM gives a complete solution for digitizing analog radio bands such as Short-Wave/Medium-Wave/Frequency-Modulation (SW/MW/FM) and other VHF bands. It can be used for both public and industrial transmissions for national, regional and international coverage. The developed SDDRM is a high-quality digital replacement for popular analog radio broadcasting system for the AM and FM/VHF bands. It gives a complete solution for digitizing analog radio bands. The results confirms that the SDDRM transfers 64 audio channels consecutively over a single frequency band without compromising quality of signals.