Effective FM Bandwidth Estimate Scheme with the DARC in Broadcasting Networks

In this paper we propose the effect on the RF bandwidth when the DARC data signal is added to the ordinary FM broadcasting signal. Generally, the bandwidth of the commercial FM broadcasting signal is strictly restricted to 200KHz. Hence, even though the DARC data signal is added at the ordinary stereophonic FM signal, the required bandwidth should not exceed 200KHz. The simulation results show that even in the worst case, the required bandwidth is about 184 KHz, and the rest of 16 KHz bandwidth could be used for other FM data broadcasting services.